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Message-ID: <CAAhV-H5cdw+GdKL43dZ2WGpTr3cMARE7Sv34yqOXD8xL_4ZsEw@mail.gmail.com>
Date: Sun, 1 May 2022 23:07:03 +0800
From: Huacai Chen <chenhuacai@...il.com>
To: WANG Xuerui <kernel@...0n.name>
Cc: Huacai Chen <chenhuacai@...ngson.cn>,
Arnd Bergmann <arnd@...db.de>,
Andy Lutomirski <luto@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Andrew Morton <akpm@...ux-foundation.org>,
David Airlie <airlied@...ux.ie>,
Jonathan Corbet <corbet@....net>,
Linus Torvalds <torvalds@...ux-foundation.org>,
linux-arch <linux-arch@...r.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Xuefeng Li <lixuefeng@...ngson.cn>,
Yanteng Si <siyanteng@...ngson.cn>,
Guo Ren <guoren@...nel.org>,
Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: Re: [PATCH V9 06/24] LoongArch: Add CPU definition headers
Hi, Xuerui,
On Sun, May 1, 2022 at 7:05 PM WANG Xuerui <kernel@...0n.name> wrote:
>
>
> On 4/30/22 17:05, Huacai Chen wrote:
> > This patch adds common headers (CPU definition and address space layout)
> > for basic LoongArch support.
> >
> > Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
> > ---
> > arch/loongarch/include/asm/addrspace.h | 110 ++
> > arch/loongarch/include/asm/cpu-features.h | 69 +
> > arch/loongarch/include/asm/cpu-info.h | 136 ++
> > arch/loongarch/include/asm/cpu.h | 127 ++
> > arch/loongarch/include/asm/fpregdef.h | 49 +
> > arch/loongarch/include/asm/loongarch.h | 1528 +++++++++++++++++++++
> > arch/loongarch/include/asm/loongson.h | 159 +++
> > arch/loongarch/include/asm/regdef.h | 43 +
> > 8 files changed, 2221 insertions(+)
> > create mode 100644 arch/loongarch/include/asm/addrspace.h
> > create mode 100644 arch/loongarch/include/asm/cpu-features.h
> > create mode 100644 arch/loongarch/include/asm/cpu-info.h
> > create mode 100644 arch/loongarch/include/asm/cpu.h
> > create mode 100644 arch/loongarch/include/asm/fpregdef.h
> > create mode 100644 arch/loongarch/include/asm/loongarch.h
> > create mode 100644 arch/loongarch/include/asm/loongson.h
> > create mode 100644 arch/loongarch/include/asm/regdef.h
> >
> > diff --git a/arch/loongarch/include/asm/addrspace.h b/arch/loongarch/include/asm/addrspace.h
> > new file mode 100644
> > index 000000000000..e92541629d25
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/addrspace.h
> > @@ -0,0 +1,110 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> This file obviously comes from the MIPS asm/addrspace.h, with visible
> similarities, so you should add attribution here.
> > + */
> > +#ifndef _ASM_ADDRSPACE_H
> > +#define _ASM_ADDRSPACE_H
> > +
> > +#include <linux/const.h>
> > +
> > +#include <asm/loongarch.h>
> > +
> > +/*
> > + * This gives the physical RAM offset.
> > + */
> > +#ifndef __ASSEMBLY__
> > +#ifndef PHYS_OFFSET
> > +#define PHYS_OFFSET _AC(0, UL)
> > +#endif
> > +extern unsigned long vm_map_base;
> > +#endif /* __ASSEMBLY__ */
> > +
> > +#ifndef IO_BASE
> > +#define IO_BASE CSR_DMW0_BASE
> > +#endif
> > +
> > +#ifndef CAC_BASE
> > +#define CAC_BASE CSR_DMW1_BASE
> Could use something less terse than the MIPS name... "CACHED_BASE"
> sounds a lot better while only costing a few more keystrokes.
I will use CACHE_BASE and UNCACHE_BASE.
> > +#endif
> > +
> > +#ifndef UNCAC_BASE
> > +#define UNCAC_BASE CSR_DMW0_BASE
> > +#endif
> > +
> > +#define DMW_PABITS 48
> > +#define TO_PHYS_MASK ((1ULL << DMW_PABITS) - 1)
> > +
> > +/*
> > + * Memory above this physical address will be considered highmem.
> > + */
> > +#ifndef HIGHMEM_START
> > +#define HIGHMEM_START (_AC(1, UL) << _AC(DMW_PABITS, UL))
> > +#endif
> > +
> > +#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
> > +#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
> > +#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
> > +
> > +/*
> > + * This handles the memory map.
> > + */
> > +#ifndef PAGE_OFFSET
> > +#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
> > +#endif
> > +
> > +#ifndef FIXADDR_TOP
> > +#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
> > +#endif
> > +
> > +/*
> > + * Configure language
> What's a "configure language"? This seems to be carried over from MIPS
> too, better clarify a bit...
> > + */
> > +#ifdef __ASSEMBLY__
> > +#define _ATYPE_
> > +#define _ATYPE32_
> > +#define _ATYPE64_
> > +#define _CONST64_(x) x
> > +#else
> > +#define _ATYPE_ __PTRDIFF_TYPE__
> > +#define _ATYPE32_ int
> > +#define _ATYPE64_ __s64
> > +#ifdef CONFIG_64BIT
> > +#define _CONST64_(x) x ## L
> > +#else
> > +#define _CONST64_(x) x ## LL
> > +#endif
> > +#endif
> > +
> > +/*
> > + * 32/64-bit LoongArch address spaces
> > + */
> > +#ifdef __ASSEMBLY__
> > +#define _ACAST32_
> > +#define _ACAST64_
> > +#else
> > +#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
> > +#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
> > +#endif
> > +
> > +#ifdef CONFIG_32BIT
> > +
> > +#define UVRANGE 0x00000000
> > +#define KPRANGE0 0x80000000
> > +#define KPRANGE1 0xa0000000
> > +#define KVRANGE 0xc0000000
> > +
> > +#else
> > +
> > +#define XUVRANGE _CONST64_(0x0000000000000000)
> > +#define XSPRANGE _CONST64_(0x4000000000000000)
> > +#define XKPRANGE _CONST64_(0x8000000000000000)
> > +#define XKVRANGE _CONST64_(0xc000000000000000)
> > +
> > +#endif
> > +
> > +/*
> > + * Returns the physical address of a KPRANGEx / XKPRANGE address
> > + */
> > +#define PHYSADDR(a) ((_ACAST64_(a)) & TO_PHYS_MASK)
> > +
> > +#endif /* _ASM_ADDRSPACE_H */
> > diff --git a/arch/loongarch/include/asm/cpu-features.h b/arch/loongarch/include/asm/cpu-features.h
> > new file mode 100644
> > index 000000000000..e29d446112e8
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/cpu-features.h
> > @@ -0,0 +1,69 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> This is also awfully similar to the MIPS header with the same name. Add
> attribution... I won't repeat myself for the other files out there, but
> make sure all derivative work are appropriately marked!
> > + */
> > +#ifndef __ASM_CPU_FEATURES_H
> > +#define __ASM_CPU_FEATURES_H
> > +
> > +#include <asm/cpu.h>
> > +#include <asm/cpu-info.h>
> > +
> > +#define cpu_opt(opt) (cpu_data[0].options & (opt))
> > +#define cpu_has(feat) (cpu_data[0].options & BIT_ULL(feat))
> > +
> > +#define cpu_has_loongarch (cpu_has_loongarch32 | cpu_has_loongarch64)
> > +#define cpu_has_loongarch32 (cpu_data[0].isa_level & LOONGARCH_CPU_ISA_32BIT)
> > +#define cpu_has_loongarch64 (cpu_data[0].isa_level & LOONGARCH_CPU_ISA_64BIT)
> > +
> > +#define cpu_icache_line_size() cpu_data[0].icache.linesz
> > +#define cpu_dcache_line_size() cpu_data[0].dcache.linesz
> > +#define cpu_vcache_line_size() cpu_data[0].vcache.linesz
> > +#define cpu_scache_line_size() cpu_data[0].scache.linesz
> > +
> > +#ifdef CONFIG_32BIT
> > +# define cpu_has_64bits (cpu_data[0].isa_level & LOONGARCH_CPU_ISA_64BIT)
> > +# define cpu_vabits 31
> > +# define cpu_pabits 31
> > +#endif
> > +
> > +#ifdef CONFIG_64BIT
> > +# define cpu_has_64bits 1
> > +# define cpu_vabits cpu_data[0].vabits
> > +# define cpu_pabits cpu_data[0].pabits
> > +# define __NEED_ADDRBITS_PROBE
> > +#endif
> > +
> > +/*
> > + * SMP assumption: Options of CPU 0 are a superset of all processors.
> > + * This is true for all known LoongArch systems.
> > + */
> > +#define cpu_has_cpucfg cpu_opt(LOONGARCH_CPU_CPUCFG)
> > +#define cpu_has_lam cpu_opt(LOONGARCH_CPU_LAM)
> > +#define cpu_has_ual cpu_opt(LOONGARCH_CPU_UAL)
> > +#define cpu_has_fpu cpu_opt(LOONGARCH_CPU_FPU)
> > +#define cpu_has_lsx cpu_opt(LOONGARCH_CPU_LSX)
> > +#define cpu_has_lasx cpu_opt(LOONGARCH_CPU_LASX)
> > +#define cpu_has_complex cpu_opt(LOONGARCH_CPU_COMPLEX)
> > +#define cpu_has_crypto cpu_opt(LOONGARCH_CPU_CRYPTO)
> > +#define cpu_has_lvz cpu_opt(LOONGARCH_CPU_LVZ)
> > +#define cpu_has_lbt_x86 cpu_opt(LOONGARCH_CPU_LBT_X86)
> > +#define cpu_has_lbt_arm cpu_opt(LOONGARCH_CPU_LBT_ARM)
> > +#define cpu_has_lbt_mips cpu_opt(LOONGARCH_CPU_LBT_MIPS)
> > +#define cpu_has_lbt (cpu_has_lbt_x86|cpu_has_lbt_arm|cpu_has_lbt_mips)
> > +#define cpu_has_csr cpu_opt(LOONGARCH_CPU_CSR)
> > +#define cpu_has_tlb cpu_opt(LOONGARCH_CPU_TLB)
> > +#define cpu_has_watch cpu_opt(LOONGARCH_CPU_WATCH)
> > +#define cpu_has_vint cpu_opt(LOONGARCH_CPU_VINT)
> > +#define cpu_has_csripi cpu_opt(LOONGARCH_CPU_CSRIPI)
> > +#define cpu_has_extioi cpu_opt(LOONGARCH_CPU_EXTIOI)
> > +#define cpu_has_prefetch cpu_opt(LOONGARCH_CPU_PREFETCH)
> > +#define cpu_has_pmp cpu_opt(LOONGARCH_CPU_PMP)
> > +#define cpu_has_perf cpu_opt(LOONGARCH_CPU_PMP)
> > +#define cpu_has_scalefreq cpu_opt(LOONGARCH_CPU_SCALEFREQ)
> > +#define cpu_has_flatmode cpu_opt(LOONGARCH_CPU_FLATMODE)
> > +#define cpu_has_eiodecode cpu_opt(LOONGARCH_CPU_EIODECODE)
> > +#define cpu_has_guestid cpu_opt(LOONGARCH_CPU_GUESTID)
> > +#define cpu_has_hypervisor cpu_opt(LOONGARCH_CPU_HYPERVISOR)
> These are all dynamic, according to these definitions, unlike the MIPS
> asm/cpu-features.h where features can be statically overridden by
> individual mach. So we can drop most of these and just write
> cpu_opt(XXX) inline everywhere?
> > +
> > +
> > +#endif /* __ASM_CPU_FEATURES_H */
> > diff --git a/arch/loongarch/include/asm/cpu-info.h b/arch/loongarch/include/asm/cpu-info.h
> > new file mode 100644
> > index 000000000000..8c173ee5650b
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/cpu-info.h
> > @@ -0,0 +1,136 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef __ASM_CPU_INFO_H
> > +#define __ASM_CPU_INFO_H
> > +
> > +#include <linux/cache.h>
> > +#include <linux/types.h>
> > +
> > +#include <asm/loongarch.h>
> > +
> > +/*
> > + * Descriptor for a cache
> > + */
> > +struct cache_desc {
> > + unsigned int waysize; /* Bytes per way */
> > + unsigned short sets; /* Number of lines per set */
> > + unsigned char ways; /* Number of ways */
> > + unsigned char linesz; /* Size of line in bytes */
> > + unsigned char waybit; /* Bits to select in a cache set */
> > + unsigned char flags; /* Flags describing cache properties */
> > +};
> > +
> > +struct cpuinfo_loongarch {
> > + u64 asid_cache;
> > + unsigned long asid_mask;
> > +
> > + /*
> > + * Capability and feature descriptor structure for LoongArch CPU
> > + */
> > + unsigned long ases;
> Please don't use MIPS acronyms, especially NOT this one. ASE means
> Application-Specific Extension, but LoongArch has none
> "application-specific" adaptations at the moment...
OK, ases should be removed.
> > + unsigned long long options;
> > + unsigned int processor_id;
> > + unsigned int fpu_vers;
> > + unsigned int fpu_csr0;
> > + unsigned int fpu_mask;
> > + unsigned int cputype;
> > + int isa_level;
> > + int tlbsize;
> > + int tlbsizemtlb;
> > + int tlbsizestlbsets;
> > + int tlbsizestlbways;
> > + struct cache_desc icache; /* Primary I-cache */
> > + struct cache_desc dcache; /* Primary D or combined I/D cache */
> > + struct cache_desc vcache; /* Victim cache, between pcache and scache */
> > + struct cache_desc scache; /* Secondary cache */
> > + struct cache_desc tcache; /* Tertiary/split secondary cache */
> > + int package;/* physical package number */
> > + unsigned int globalnumber;
> > + int vabits; /* Virtual Address size in bits */
> > + int pabits; /* Physical Address size in bits */
> > + void *data; /* Additional data */
> > + unsigned int watch_dreg_count; /* Number data breakpoints */
> > + unsigned int watch_ireg_count; /* Number instruction breakpoints */
> > + unsigned int watch_reg_use_cnt; /* min(NUM_WATCH_REGS, watch_dreg_count + watch_ireg_count), Usable by ptrace */
> > + unsigned int kscratch_mask; /* Usable KScratch mask. */
> > +} __aligned(SMP_CACHE_BYTES);
> > +
> > +extern struct cpuinfo_loongarch cpu_data[];
> > +#define boot_cpu_data cpu_data[0]
> > +#define current_cpu_data cpu_data[smp_processor_id()]
> > +#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
> > +
> > +extern void cpu_probe(void);
> > +
> > +extern const char *__cpu_family[];
> > +extern const char *__cpu_full_name[];
> > +#define cpu_family_string() __cpu_family[raw_smp_processor_id()]
> > +#define cpu_full_name_string() __cpu_full_name[raw_smp_processor_id()]
> > +
> > +struct seq_file;
> > +struct notifier_block;
> > +
> > +extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
> > +extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
> > +
> > +#define proc_cpuinfo_notifier(fn, pri) \
> > +({ \
> > + static struct notifier_block fn##_nb = { \
> > + .notifier_call = fn, \
> > + .priority = pri \
> > + }; \
> > + \
> > + register_proc_cpuinfo_notifier(&fn##_nb); \
> > +})
> > +
> > +struct proc_cpuinfo_notifier_args {
> > + struct seq_file *m;
> > + unsigned long n;
> > +};
> > +
> > +static inline unsigned int cpu_cluster(struct cpuinfo_loongarch *cpuinfo)
> > +{
> > + return (cpuinfo->globalnumber & LOONGARCH_GLOBALNUMBER_CLUSTER) >>
> > + LOONGARCH_GLOBALNUMBER_CLUSTER_SHF;
> > +}
> > +
> > +static inline unsigned int cpu_core(struct cpuinfo_loongarch *cpuinfo)
> > +{
> > + return (cpuinfo->globalnumber & LOONGARCH_GLOBALNUMBER_CORE) >>
> > + LOONGARCH_GLOBALNUMBER_CORE_SHF;
> > +}
> > +
> > +extern void cpu_set_cluster(struct cpuinfo_loongarch *cpuinfo, unsigned int cluster);
> > +extern void cpu_set_core(struct cpuinfo_loongarch *cpuinfo, unsigned int core);
> > +
> > +static inline bool cpus_are_siblings(int cpua, int cpub)
> > +{
> > + struct cpuinfo_loongarch *infoa = &cpu_data[cpua];
> > + struct cpuinfo_loongarch *infob = &cpu_data[cpub];
> > + unsigned int gnuma, gnumb;
> > +
> > + if (infoa->package != infob->package)
> > + return false;
> > +
> > + gnuma = infoa->globalnumber & ~LOONGARCH_GLOBALNUMBER_VP;
> > + gnumb = infob->globalnumber & ~LOONGARCH_GLOBALNUMBER_VP;
> > + if (gnuma != gnumb)
> > + return false;
> > +
> > + return true;
> > +}
>
> Please don't use the "global number" expression anywhere in the port;
> come up with another suitable name.
>
> I'm initially confused by all the "GLOBALNUMBER" and "VP" things, only
> knowing they might be related to something MIPS-specific, because the
> "global numbers" of powerpc and microblaze obviously stand for PCI
> domain number, as explained by their comments. After some further
> digging it became obvious, that GlobalNumber is actually a MIPSr6+
> configuration register, introduced by the MT ASE and conveying
> information regarding Virtual Processors. Of course LoongArch doesn't
> have anything similar to that...
Globalnumber can encode cluster number, core number and threading
number in a single word. Since we have no SMT now, I will remove it.
>
> > +
> > +static inline unsigned long cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo)
> > +{
> > + return cpuinfo->asid_mask;
> > +}
> > +
> > +static inline void set_cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo,
> > + unsigned long asid_mask)
> > +{
> > + cpuinfo->asid_mask = asid_mask;
> > +}
> Why keep the accessors when you can just inline the expression at call
> site? MIPS does this because they have to differentiate based on
> CONFIG_MIPS_ASID_BITS_VARIABLE, but LoongArch doesn't behave the same,
> so the 2 functions here should be removed.
> > +
> > +#endif /* __ASM_CPU_INFO_H */
> > diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
> > new file mode 100644
> > index 000000000000..62e9cb6520a9
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/cpu.h
> > @@ -0,0 +1,127 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * cpu.h: Values of the PRId register used to match up
> > + * various LoongArch cpu types.
>
> "PRID"; "CPU".
>
> Similarly please change all other "PRId" to "PRID" to match the
> reference manual...
>
> > + *
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef _ASM_CPU_H
> > +#define _ASM_CPU_H
> > +
> > +/*
> > + * As of the LoongArch specs from Loongson Technology, the PRId register
> > + * (CPUCFG.00) is defined in this (backwards compatible) way:
> > + *
> > + * +----------------+----------------+----------------+----------------+
> > + * | Reserved | Company ID | Processor ID | Revision |
> > + * +----------------+----------------+----------------+----------------+
> > + * 31 24 23 16 15 8 7 0
>
> I can't find the relevant spec... at least not in the Loongson
> 3A5000/3B5000 Processor Reference Manual nor the LoongArch reference
> manual. The former only gives the default value of 0x14c010 while the
> latter only mentions the field's name and meaning.
>
> Also, "as of the specs" is broken; you should say "As described in the ...".
>
> > + *
> > + */
> > +
> > +/*
> > + * Assigned Company values for bits 23:16 of the PRId register.
> > + */
> > +
> > +#define PRID_COMP_MASK 0xff0000
> > +
> > +#define PRID_COMP_LOONGSON 0x140000
> > +
> > +/*
> > + * Assigned Processor ID (implementation) values for bits 15:8 of the PRId
> > + * register. In order to detect a certain CPU type exactly eventually
> > + * additional registers may need to be examined.
> > + */
> > +
> > +#define PRID_IMP_MASK 0xff00
> > +
> > +#define PRID_IMP_LOONGSON_32 0x4200 /* Loongson 32bit */
> > +#define PRID_IMP_LOONGSON_64R 0x6100 /* Reduced Loongson 64bit */
> > +#define PRID_IMP_LOONGSON_64C 0x6300 /* Classic Loongson 64bit */
> Do we even have "classic" LoongArch cores? This scheme surely is carried
> over from the MIPS era, but I don't think any of the "classic"
> Loongson/MIPS cores is getting a LoongArch refresh...
You should consider 2K500 and so on.
> > +#define PRID_IMP_LOONGSON_64G 0xc000 /* Generic Loongson 64bit */
> > +#define PRID_IMP_UNKNOWN 0xff00
> > +
> > +/*
> > + * Particular Revision values for bits 7:0 of the PRId register.
> > + */
> > +
> > +#define PRID_REV_MASK 0x00ff
> > +
> > +#if !defined(__ASSEMBLY__)
> > +
> > +enum cpu_type_enum {
> > + CPU_UNKNOWN,
> > + CPU_LOONGSON32,
> > + CPU_LOONGSON64,
> > + CPU_LAST
> > +};
> > +
> > +#endif /* !__ASSEMBLY */
> > +
> > +/*
> > + * ISA Level encodings
> > + *
> > + */
> > +
> > +#define LOONGARCH_CPU_ISA_LA32R 0x00000001
> > +#define LOONGARCH_CPU_ISA_LA32S 0x00000002
> > +#define LOONGARCH_CPU_ISA_LA64 0x00000004
> > +
> > +#define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S)
> > +#define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64
> > +
> > +/*
> > + * CPU Option encodings
> > + */
> > +#define CPU_FEATURE_CPUCFG 0 /* CPU has CPUCFG */
> > +#define CPU_FEATURE_LAM 1 /* CPU has Atomic instructions */
> > +#define CPU_FEATURE_UAL 2 /* CPU has Unaligned Access support */
> > +#define CPU_FEATURE_FPU 3 /* CPU has FPU */
> > +#define CPU_FEATURE_LSX 4 /* CPU has 128bit SIMD instructions */
> > +#define CPU_FEATURE_LASX 5 /* CPU has 256bit SIMD instructions */
> > +#define CPU_FEATURE_COMPLEX 6 /* CPU has Complex instructions */
> > +#define CPU_FEATURE_CRYPTO 7 /* CPU has Crypto instructions */
> > +#define CPU_FEATURE_LVZ 8 /* CPU has Virtualization extension */
> > +#define CPU_FEATURE_LBT_X86 9 /* CPU has X86 Binary Translation */
> > +#define CPU_FEATURE_LBT_ARM 10 /* CPU has ARM Binary Translation */
> > +#define CPU_FEATURE_LBT_MIPS 11 /* CPU has MIPS Binary Translation */
> > +#define CPU_FEATURE_TLB 12 /* CPU has TLB */
> > +#define CPU_FEATURE_CSR 13 /* CPU has CSR feature */
> > +#define CPU_FEATURE_WATCH 14 /* CPU has watchpoint registers */
> > +#define CPU_FEATURE_VINT 15 /* CPU has vectored interrupts */
> > +#define CPU_FEATURE_CSRIPI 16 /* CPU has CSR-IPI */
> > +#define CPU_FEATURE_EXTIOI 17 /* CPU has EXT-IOI */
> > +#define CPU_FEATURE_PREFETCH 18 /* CPU has prefetch instructions */
> > +#define CPU_FEATURE_PMP 19 /* CPU has perfermance counter */
> > +#define CPU_FEATURE_SCALEFREQ 20 /* CPU support scale cpufreq */
> > +#define CPU_FEATURE_FLATMODE 21 /* CPU has flatmode */
> > +#define CPU_FEATURE_EIODECODE 22 /* CPU has extioi int pin decode mode */
> "EXTIOI interrupt pin decoding mode"?
> > +#define CPU_FEATURE_GUESTID 23 /* CPU has GuestID feature */
> > +#define CPU_FEATURE_HYPERVISOR 24 /* CPU has hypervisor (run in VM) */
> "CPU is virtualized (under a hypervisor)"?
> > +
> > +#define LOONGARCH_CPU_CPUCFG BIT_ULL(CPU_FEATURE_CPUCFG)
> > +#define LOONGARCH_CPU_LAM BIT_ULL(CPU_FEATURE_LAM)
> > +#define LOONGARCH_CPU_UAL BIT_ULL(CPU_FEATURE_UAL)
> > +#define LOONGARCH_CPU_FPU BIT_ULL(CPU_FEATURE_FPU)
> > +#define LOONGARCH_CPU_LSX BIT_ULL(CPU_FEATURE_LSX)
> > +#define LOONGARCH_CPU_LASX BIT_ULL(CPU_FEATURE_LASX)
> > +#define LOONGARCH_CPU_COMPLEX BIT_ULL(CPU_FEATURE_COMPLEX)
> > +#define LOONGARCH_CPU_CRYPTO BIT_ULL(CPU_FEATURE_CRYPTO)
> > +#define LOONGARCH_CPU_LVZ BIT_ULL(CPU_FEATURE_LVZ)
> > +#define LOONGARCH_CPU_LBT_X86 BIT_ULL(CPU_FEATURE_LBT_X86)
> > +#define LOONGARCH_CPU_LBT_ARM BIT_ULL(CPU_FEATURE_LBT_ARM)
> > +#define LOONGARCH_CPU_LBT_MIPS BIT_ULL(CPU_FEATURE_LBT_MIPS)
> > +#define LOONGARCH_CPU_TLB BIT_ULL(CPU_FEATURE_TLB)
> > +#define LOONGARCH_CPU_CSR BIT_ULL(CPU_FEATURE_CSR)
> > +#define LOONGARCH_CPU_WATCH BIT_ULL(CPU_FEATURE_WATCH)
> > +#define LOONGARCH_CPU_VINT BIT_ULL(CPU_FEATURE_VINT)
> > +#define LOONGARCH_CPU_CSRIPI BIT_ULL(CPU_FEATURE_CSRIPI)
> > +#define LOONGARCH_CPU_EXTIOI BIT_ULL(CPU_FEATURE_EXTIOI)
> > +#define LOONGARCH_CPU_PREFETCH BIT_ULL(CPU_FEATURE_PREFETCH)
> > +#define LOONGARCH_CPU_PMP BIT_ULL(CPU_FEATURE_PMP)
> > +#define LOONGARCH_CPU_SCALEFREQ BIT_ULL(CPU_FEATURE_SCALEFREQ)
> > +#define LOONGARCH_CPU_FLATMODE BIT_ULL(CPU_FEATURE_FLATMODE)
> > +#define LOONGARCH_CPU_EIODECODE BIT_ULL(CPU_FEATURE_EIODECODE)
> > +#define LOONGARCH_CPU_GUESTID BIT_ULL(CPU_FEATURE_GUESTID)
> > +#define LOONGARCH_CPU_HYPERVISOR BIT_ULL(CPU_FEATURE_HYPERVISOR)
> > +#endif /* _ASM_CPU_H */
> > diff --git a/arch/loongarch/include/asm/fpregdef.h b/arch/loongarch/include/asm/fpregdef.h
> > new file mode 100644
> > index 000000000000..151dc9aee1c6
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/fpregdef.h
> > @@ -0,0 +1,49 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Definitions for the FPU register names
> > + *
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef _ASM_FPREGDEF_H
> > +#define _ASM_FPREGDEF_H
> > +
> > +#define fv0 $f0 /* return value */
> > +#define fv1 $f2
> > +#define fa0 $f12 /* argument registers */
> > +#define fa1 $f13
> > +#define fa2 $f14
> > +#define fa3 $f15
> > +#define fa4 $f16
> > +#define fa5 $f17
> > +#define fa6 $f18
> > +#define fa7 $f19
> > +#define ft0 $f4 /* caller saved */
> > +#define ft1 $f5
> > +#define ft2 $f6
> > +#define ft3 $f7
> > +#define ft4 $f8
> > +#define ft5 $f9
> > +#define ft6 $f10
> > +#define ft7 $f11
> > +#define ft8 $f20
> > +#define ft9 $f21
> > +#define ft10 $f22
> > +#define ft11 $f23
> > +#define ft12 $f1
> > +#define ft13 $f3
> > +#define fs0 $f24 /* callee saved */
> > +#define fs1 $f25
> > +#define fs2 $f26
> > +#define fs3 $f27
> > +#define fs4 $f28
> > +#define fs5 $f29
> > +#define fs6 $f30
> > +#define fs7 $f31
> This doesn't agree with the current ABI spec, and may need further
> checking. There's no way $f1 could be $ft12 and return values not
> sharing storage with the first two arguments.
> > +
> > +#define fcsr0 $r0
> > +#define fcsr1 $r1
> > +#define fcsr2 $r2
> > +#define fcsr3 $r3
> > +#define vcsr16 $r16
> > +
> > +#endif /* _ASM_FPREGDEF_H */
> > diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
> > new file mode 100644
> > index 000000000000..083e6726d4cb
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/loongarch.h
> > @@ -0,0 +1,1528 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef _ASM_LOONGARCH_H
> > +#define _ASM_LOONGARCH_H
> > +
> > +#include <linux/bits.h>
> > +#include <linux/linkage.h>
> > +#include <linux/types.h>
> > +
> > +#ifndef __ASSEMBLY__
> > +#include <larchintrin.h>
> > +
> > +/*
> > + * parse_r var, r - Helper assembler macro for parsing register names.
> > + *
> > + * This converts the register name in $n form provided in \r to the
> > + * corresponding register number, which is assigned to the variable \var. It is
> > + * needed to allow explicit encoding of instructions in inline assembly where
> > + * registers are chosen by the compiler in $n form, allowing us to avoid using
> > + * fixed register numbers.
> > + *
> > + * It also allows newer instructions (not implemented by the assembler) to be
> > + * transparently implemented using assembler macros, instead of needing separate
> > + * cases depending on toolchain support.
> > + *
> > + * Simple usage example:
> > + * __asm__ __volatile__("parse_r addr, %0\n\t"
> > + * "#invtlb op, 0, %0\n\t"
> > + * ".word ((0x6498000) | (addr << 10) | (0 << 5) | op)"
> > + * : "=r" (status);
> > + */
> > +
> > +/* Match an individual register number and assign to \var */
> > +#define _IFC_REG(n) \
> > + ".ifc \\r, $r" #n "\n\t" \
> > + "\\var = " #n "\n\t" \
> > + ".endif\n\t"
> > +
> > +__asm__(".macro parse_r var r\n\t"
> > + "\\var = -1\n\t"
> > + _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3)
> > + _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7)
> > + _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11)
> > + _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15)
> > + _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19)
> > + _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23)
> > + _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27)
> > + _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31)
> > + ".iflt \\var\n\t"
> > + ".error \"Unable to parse register name \\r\"\n\t"
> > + ".endif\n\t"
> > + ".endm");
> > +
> > +#undef _IFC_REG
> > +
> > +/* CPUCFG */
> > +static inline u32 read_cpucfg(u32 reg)
> > +{
> > + return __cpucfg(reg);
> > +}
> > +
> > +#endif /* !__ASSEMBLY__ */
> > +
> > +#ifdef __ASSEMBLY__
> > +
> > +/* LoongArch Registers */
> > +#define REG_RA 0x1
> > +#define REG_TP 0x2
> > +#define REG_SP 0x3
> > +#define REG_A0 0x4
> > +#define REG_A1 0x5
> > +#define REG_A2 0x6
> > +#define REG_A3 0x7
> > +#define REG_A4 0x8
> > +#define REG_A5 0x9
> > +#define REG_A6 0xa
> > +#define REG_A7 0xb
> > +#define REG_V0 REG_A0
> > +#define REG_V1 REG_A1
> Remove V* aliases per spec.
> > +#define REG_T0 0xc
> > +#define REG_T1 0xd
> > +#define REG_T2 0xe
> > +#define REG_T3 0xf
> > +#define REG_T4 0x10
> > +#define REG_T5 0x11
> > +#define REG_T6 0x12
> > +#define REG_T7 0x13
> > +#define REG_T8 0x14
> > +#define REG_U0 0x15
> And document this somewhere.
OK, thanks.
> > +#define REG_FP 0x16
> > +#define REG_S0 0x17
> > +#define REG_S1 0x18
> > +#define REG_S2 0x19
> > +#define REG_S3 0x1a
> > +#define REG_S4 0x1b
> > +#define REG_S5 0x1c
> > +#define REG_S6 0x1d
> > +#define REG_S7 0x1e
> > +#define REG_S8 0x1f
> > +
> > +#endif /* __ASSEMBLY__ */
> > +
> > +/* Bit Domains for CPUCFG registers */
> "bit fields"?
OK, thanks.
Huacai
> > +#define LOONGARCH_CPUCFG0 0x0
> > +#define CPUCFG0_PRID GENMASK(31, 0)
> > +
> > +#define LOONGARCH_CPUCFG1 0x1
> > +#define CPUCFG1_ISGR32 BIT(0)
> > +#define CPUCFG1_ISGR64 BIT(1)
> > +#define CPUCFG1_PAGING BIT(2)
> > +#define CPUCFG1_IOCSR BIT(3)
> > +#define CPUCFG1_PABITS GENMASK(11, 4)
> > +#define CPUCFG1_VABITS GENMASK(19, 12)
> > +#define CPUCFG1_UAL BIT(20)
> > +#define CPUCFG1_RI BIT(21)
> > +#define CPUCFG1_EP BIT(22)
> > +#define CPUCFG1_RPLV BIT(23)
> > +#define CPUCFG1_HUGEPG BIT(24)
> > +#define CPUCFG1_IOCSRBRD BIT(25)
> > +#define CPUCFG1_MSGINT BIT(26)
> These names are not consistent with the reference manual. For example
> the bits 0-1 is actually an enum, and bit 2 is called PGMMU in the
> LoongArch reference manual.
> > +
> > +#define LOONGARCH_CPUCFG2 0x2
> > +#define CPUCFG2_FP BIT(0)
> > +#define CPUCFG2_FPSP BIT(1)
> > +#define CPUCFG2_FPDP BIT(2)
> > +#define CPUCFG2_FPVERS GENMASK(5, 3)
> > +#define CPUCFG2_LSX BIT(6)
> > +#define CPUCFG2_LASX BIT(7)
> > +#define CPUCFG2_COMPLEX BIT(8)
> > +#define CPUCFG2_CRYPTO BIT(9)
> > +#define CPUCFG2_LVZP BIT(10)
> > +#define CPUCFG2_LVZVER GENMASK(13, 11)
> > +#define CPUCFG2_LLFTP BIT(14)
> > +#define CPUCFG2_LLFTPREV GENMASK(17, 15)
> > +#define CPUCFG2_X86BT BIT(18)
> > +#define CPUCFG2_ARMBT BIT(19)
> > +#define CPUCFG2_MIPSBT BIT(20)
> > +#define CPUCFG2_LSPW BIT(21)
> > +#define CPUCFG2_LAM BIT(22)
> > +
> > +#define LOONGARCH_CPUCFG3 0x3
> > +#define CPUCFG3_CCDMA BIT(0)
> > +#define CPUCFG3_SFB BIT(1)
> > +#define CPUCFG3_UCACC BIT(2)
> > +#define CPUCFG3_LLEXC BIT(3)
> > +#define CPUCFG3_SCDLY BIT(4)
> > +#define CPUCFG3_LLDBAR BIT(5)
> > +#define CPUCFG3_ITLBT BIT(6)
> > +#define CPUCFG3_ICACHET BIT(7)
> > +#define CPUCFG3_SPW_LVL GENMASK(10, 8)
> > +#define CPUCFG3_SPW_HG_HF BIT(11)
> > +#define CPUCFG3_RVA BIT(12)
> > +#define CPUCFG3_RVAMAX GENMASK(16, 13)
> > +
> > +#define LOONGARCH_CPUCFG4 0x4
> > +#define CPUCFG4_CCFREQ GENMASK(31, 0)
> > +
> > +#define LOONGARCH_CPUCFG5 0x5
> > +#define CPUCFG5_CCMUL GENMASK(15, 0)
> > +#define CPUCFG5_CCDIV GENMASK(31, 16)
> > +
> > +#define LOONGARCH_CPUCFG6 0x6
> > +#define CPUCFG6_PMP BIT(0)
> > +#define CPUCFG6_PAMVER GENMASK(3, 1)
> > +#define CPUCFG6_PMNUM GENMASK(7, 4)
> > +#define CPUCFG6_PMBITS GENMASK(13, 8)
> > +#define CPUCFG6_UPM BIT(14)
> > +
> > +#define LOONGARCH_CPUCFG16 0x10
> > +#define CPUCFG16_L1_IUPRE BIT(0)
> > +#define CPUCFG16_L1_IUUNIFY BIT(1)
> > +#define CPUCFG16_L1_DPRE BIT(2)
> > +#define CPUCFG16_L2_IUPRE BIT(3)
> > +#define CPUCFG16_L2_IUUNIFY BIT(4)
> > +#define CPUCFG16_L2_IUPRIV BIT(5)
> > +#define CPUCFG16_L2_IUINCL BIT(6)
> > +#define CPUCFG16_L2_DPRE BIT(7)
> > +#define CPUCFG16_L2_DPRIV BIT(8)
> > +#define CPUCFG16_L2_DINCL BIT(9)
> > +#define CPUCFG16_L3_IUPRE BIT(10)
> > +#define CPUCFG16_L3_IUUNIFY BIT(11)
> > +#define CPUCFG16_L3_IUPRIV BIT(12)
> > +#define CPUCFG16_L3_IUINCL BIT(13)
> > +#define CPUCFG16_L3_DPRE BIT(14)
> > +#define CPUCFG16_L3_DPRIV BIT(15)
> > +#define CPUCFG16_L3_DINCL BIT(16)
> > +
> > +#define LOONGARCH_CPUCFG17 0x11
> > +#define CPUCFG17_L1I_WAYS_M GENMASK(15, 0)
> > +#define CPUCFG17_L1I_SETS_M GENMASK(23, 16)
> > +#define CPUCFG17_L1I_SIZE_M GENMASK(30, 24)
> > +#define CPUCFG17_L1I_WAYS 0
> > +#define CPUCFG17_L1I_SETS 16
> > +#define CPUCFG17_L1I_SIZE 24
> > +
> > +#define LOONGARCH_CPUCFG18 0x12
> > +#define CPUCFG18_L1D_WAYS_M GENMASK(15, 0)
> > +#define CPUCFG18_L1D_SETS_M GENMASK(23, 16)
> > +#define CPUCFG18_L1D_SIZE_M GENMASK(30, 24)
> > +#define CPUCFG18_L1D_WAYS 0
> > +#define CPUCFG18_L1D_SETS 16
> > +#define CPUCFG18_L1D_SIZE 24
> > +
> > +#define LOONGARCH_CPUCFG19 0x13
> > +#define CPUCFG19_L2_WAYS_M GENMASK(15, 0)
> > +#define CPUCFG19_L2_SETS_M GENMASK(23, 16)
> > +#define CPUCFG19_L2_SIZE_M GENMASK(30, 24)
> > +#define CPUCFG19_L2_WAYS 0
> > +#define CPUCFG19_L2_SETS 16
> > +#define CPUCFG19_L2_SIZE 24
> > +
> > +#define LOONGARCH_CPUCFG20 0x14
> > +#define CPUCFG20_L3_WAYS_M GENMASK(15, 0)
> > +#define CPUCFG20_L3_SETS_M GENMASK(23, 16)
> > +#define CPUCFG20_L3_SIZE_M GENMASK(30, 24)
> > +#define CPUCFG20_L3_WAYS 0
> > +#define CPUCFG20_L3_SETS 16
> > +#define CPUCFG20_L3_SIZE 24
> > +
> > +#define LOONGARCH_CPUCFG48 0x30
> > +#define CPUCFG48_MCSR_LCK BIT(0)
> > +#define CPUCFG48_NAP_EN BIT(1)
> > +#define CPUCFG48_VFPU_CG BIT(2)
> > +#define CPUCFG48_RAM_CG BIT(3)
> > +
> > +#ifndef __ASSEMBLY__
> > +
> > +/* CSR */
> > +static __always_inline u32 csr_readl(u32 reg)
> > +{
> > + return __csrrd_w(reg);
> > +}
> > +
> > +static __always_inline u64 csr_readq(u32 reg)
> > +{
> > + return __csrrd_d(reg);
> > +}
> > +
> > +static __always_inline void csr_writel(u32 val, u32 reg)
> > +{
> > + __csrwr_w(val, reg);
> > +}
> > +
> > +static __always_inline void csr_writeq(u64 val, u32 reg)
> > +{
> > + __csrwr_d(val, reg);
> > +}
> > +
> > +static __always_inline u32 csr_xchgl(u32 val, u32 mask, u32 reg)
> > +{
> > + return __csrxchg_w(val, mask, reg);
> > +}
> > +
> > +static __always_inline u64 csr_xchgq(u64 val, u64 mask, u32 reg)
> > +{
> > + return __csrxchg_d(val, mask, reg);
> > +}
> > +
> > +/* IOCSR */
> > +static __always_inline u32 iocsr_readl(u32 reg)
> > +{
> > + return __iocsrrd_w(reg);
> > +}
> > +
> > +static __always_inline u64 iocsr_readq(u32 reg)
> > +{
> > + return __iocsrrd_d(reg);
> > +}
> > +
> > +static __always_inline void iocsr_writel(u32 val, u32 reg)
> > +{
> > + __iocsrwr_w(val, reg);
> > +}
> > +
> > +static __always_inline void iocsr_writeq(u64 val, u32 reg)
> > +{
> > + __iocsrwr_d(val, reg);
> > +}
> > +
> > +#endif /* !__ASSEMBLY__ */
> > +
> > +/* CSR register number */
> > +
> > +/* Basic CSR registers */
> > +#define LOONGARCH_CSR_CRMD 0x0 /* Current mode info */
> > +#define CSR_CRMD_WE_SHIFT 9
> > +#define CSR_CRMD_WE (_ULCAST_(0x1) << CSR_CRMD_WE_SHIFT)
> > +#define CSR_CRMD_DACM_SHIFT 7
> > +#define CSR_CRMD_DACM_WIDTH 2
> > +#define CSR_CRMD_DACM (_ULCAST_(0x3) << CSR_CRMD_DACM_SHIFT)
> > +#define CSR_CRMD_DACF_SHIFT 5
> > +#define CSR_CRMD_DACF_WIDTH 2
> > +#define CSR_CRMD_DACF (_ULCAST_(0x3) << CSR_CRMD_DACF_SHIFT)
> > +#define CSR_CRMD_PG_SHIFT 4
> > +#define CSR_CRMD_PG (_ULCAST_(0x1) << CSR_CRMD_PG_SHIFT)
> > +#define CSR_CRMD_DA_SHIFT 3
> > +#define CSR_CRMD_DA (_ULCAST_(0x1) << CSR_CRMD_DA_SHIFT)
> > +#define CSR_CRMD_IE_SHIFT 2
> > +#define CSR_CRMD_IE (_ULCAST_(0x1) << CSR_CRMD_IE_SHIFT)
> > +#define CSR_CRMD_PLV_SHIFT 0
> > +#define CSR_CRMD_PLV_WIDTH 2
> > +#define CSR_CRMD_PLV (_ULCAST_(0x3) << CSR_CRMD_PLV_SHIFT)
> > +
> > +#define PLV_KERN 0
> > +#define PLV_USER 3
> > +#define PLV_MASK 0x3
> > +
> > +#define LOONGARCH_CSR_PRMD 0x1 /* Prev-exception mode info */
> > +#define CSR_PRMD_PWE_SHIFT 3
> > +#define CSR_PRMD_PWE (_ULCAST_(0x1) << CSR_PRMD_PWE_SHIFT)
> > +#define CSR_PRMD_PIE_SHIFT 2
> > +#define CSR_PRMD_PIE (_ULCAST_(0x1) << CSR_PRMD_PIE_SHIFT)
> > +#define CSR_PRMD_PPLV_SHIFT 0
> > +#define CSR_PRMD_PPLV_WIDTH 2
> > +#define CSR_PRMD_PPLV (_ULCAST_(0x3) << CSR_PRMD_PPLV_SHIFT)
> > +
> > +#define LOONGARCH_CSR_EUEN 0x2 /* Extended unit enable */
> > +#define CSR_EUEN_LBTEN_SHIFT 3
> > +#define CSR_EUEN_LBTEN (_ULCAST_(0x1) << CSR_EUEN_LBTEN_SHIFT)
> > +#define CSR_EUEN_LASXEN_SHIFT 2
> > +#define CSR_EUEN_LASXEN (_ULCAST_(0x1) << CSR_EUEN_LASXEN_SHIFT)
> > +#define CSR_EUEN_LSXEN_SHIFT 1
> > +#define CSR_EUEN_LSXEN (_ULCAST_(0x1) << CSR_EUEN_LSXEN_SHIFT)
> > +#define CSR_EUEN_FPEN_SHIFT 0
> > +#define CSR_EUEN_FPEN (_ULCAST_(0x1) << CSR_EUEN_FPEN_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MISC 0x3 /* Misc config */
> > +
> > +#define LOONGARCH_CSR_ECFG 0x4 /* Exception config */
> > +#define CSR_ECFG_VS_SHIFT 16
> > +#define CSR_ECFG_VS_WIDTH 3
> > +#define CSR_ECFG_VS (_ULCAST_(0x7) << CSR_ECFG_VS_SHIFT)
> > +#define CSR_ECFG_IM_SHIFT 0
> > +#define CSR_ECFG_IM_WIDTH 13
> > +#define CSR_ECFG_IM (_ULCAST_(0x1fff) << CSR_ECFG_IM_SHIFT)
> > +
> > +#define LOONGARCH_CSR_ESTAT 0x5 /* Exception status */
> > +#define CSR_ESTAT_ESUBCODE_SHIFT 22
> > +#define CSR_ESTAT_ESUBCODE_WIDTH 9
> > +#define CSR_ESTAT_ESUBCODE (_ULCAST_(0x1ff) << CSR_ESTAT_ESUBCODE_SHIFT)
> > +#define CSR_ESTAT_EXC_SHIFT 16
> > +#define CSR_ESTAT_EXC_WIDTH 6
> > +#define CSR_ESTAT_EXC (_ULCAST_(0x3f) << CSR_ESTAT_EXC_SHIFT)
> > +#define CSR_ESTAT_IS_SHIFT 0
> > +#define CSR_ESTAT_IS_WIDTH 15
> > +#define CSR_ESTAT_IS (_ULCAST_(0x7fff) << CSR_ESTAT_IS_SHIFT)
> > +
> > +#define LOONGARCH_CSR_ERA 0x6 /* ERA */
> > +
> > +#define LOONGARCH_CSR_BADV 0x7 /* Bad virtual address */
> > +
> > +#define LOONGARCH_CSR_BADI 0x8 /* Bad instruction */
> > +
> > +#define LOONGARCH_CSR_EENTRY 0xc /* Exception entry */
> > +
> > +/* TLB related CSR registers */
> > +#define LOONGARCH_CSR_TLBIDX 0x10 /* TLB Index, EHINV, PageSize, NP */
> > +#define CSR_TLBIDX_EHINV_SHIFT 31
> > +#define CSR_TLBIDX_EHINV (_ULCAST_(1) << CSR_TLBIDX_EHINV_SHIFT)
> > +#define CSR_TLBIDX_PS_SHIFT 24
> > +#define CSR_TLBIDX_PS_WIDTH 6
> > +#define CSR_TLBIDX_PS (_ULCAST_(0x3f) << CSR_TLBIDX_PS_SHIFT)
> > +#define CSR_TLBIDX_IDX_SHIFT 0
> > +#define CSR_TLBIDX_IDX_WIDTH 12
> > +#define CSR_TLBIDX_IDX (_ULCAST_(0xfff) << CSR_TLBIDX_IDX_SHIFT)
> > +#define CSR_TLBIDX_SIZEM 0x3f000000
> > +#define CSR_TLBIDX_SIZE CSR_TLBIDX_PS_SHIFT
> > +#define CSR_TLBIDX_IDXM 0xfff
> > +#define CSR_INVALID_ENTRY(e) (CSR_TLBIDX_EHINV | e)
> > +
> > +#define LOONGARCH_CSR_TLBEHI 0x11 /* TLB EntryHi */
> > +
> > +#define LOONGARCH_CSR_TLBELO0 0x12 /* TLB EntryLo0 */
> > +#define CSR_TLBLO0_RPLV_SHIFT 63
> > +#define CSR_TLBLO0_RPLV (_ULCAST_(0x1) << CSR_TLBLO0_RPLV_SHIFT)
> > +#define CSR_TLBLO0_NX_SHIFT 62
> > +#define CSR_TLBLO0_NX (_ULCAST_(0x1) << CSR_TLBLO0_NX_SHIFT)
> > +#define CSR_TLBLO0_NR_SHIFT 61
> > +#define CSR_TLBLO0_NR (_ULCAST_(0x1) << CSR_TLBLO0_NR_SHIFT)
> > +#define CSR_TLBLO0_PFN_SHIFT 12
> > +#define CSR_TLBLO0_PFN_WIDTH 36
> > +#define CSR_TLBLO0_PFN (_ULCAST_(0xfffffffff) << CSR_TLBLO0_PFN_SHIFT)
> > +#define CSR_TLBLO0_GLOBAL_SHIFT 6
> > +#define CSR_TLBLO0_GLOBAL (_ULCAST_(0x1) << CSR_TLBLO0_GLOBAL_SHIFT)
> > +#define CSR_TLBLO0_CCA_SHIFT 4
> > +#define CSR_TLBLO0_CCA_WIDTH 2
> > +#define CSR_TLBLO0_CCA (_ULCAST_(0x3) << CSR_TLBLO0_CCA_SHIFT)
> > +#define CSR_TLBLO0_PLV_SHIFT 2
> > +#define CSR_TLBLO0_PLV_WIDTH 2
> > +#define CSR_TLBLO0_PLV (_ULCAST_(0x3) << CSR_TLBLO0_PLV_SHIFT)
> > +#define CSR_TLBLO0_WE_SHIFT 1
> > +#define CSR_TLBLO0_WE (_ULCAST_(0x1) << CSR_TLBLO0_WE_SHIFT)
> > +#define CSR_TLBLO0_V_SHIFT 0
> > +#define CSR_TLBLO0_V (_ULCAST_(0x1) << CSR_TLBLO0_V_SHIFT)
> > +
> > +#define LOONGARCH_CSR_TLBELO1 0x13 /* TLB EntryLo1 */
> > +#define CSR_TLBLO1_RPLV_SHIFT 63
> > +#define CSR_TLBLO1_RPLV (_ULCAST_(0x1) << CSR_TLBLO1_RPLV_SHIFT)
> > +#define CSR_TLBLO1_NX_SHIFT 62
> > +#define CSR_TLBLO1_NX (_ULCAST_(0x1) << CSR_TLBLO1_NX_SHIFT)
> > +#define CSR_TLBLO1_NR_SHIFT 61
> > +#define CSR_TLBLO1_NR (_ULCAST_(0x1) << CSR_TLBLO1_NR_SHIFT)
> > +#define CSR_TLBLO1_PFN_SHIFT 12
> > +#define CSR_TLBLO1_PFN_WIDTH 36
> > +#define CSR_TLBLO1_PFN (_ULCAST_(0xfffffffff) << CSR_TLBLO1_PFN_SHIFT)
> > +#define CSR_TLBLO1_GLOBAL_SHIFT 6
> > +#define CSR_TLBLO1_GLOBAL (_ULCAST_(0x1) << CSR_TLBLO1_GLOBAL_SHIFT)
> > +#define CSR_TLBLO1_CCA_SHIFT 4
> > +#define CSR_TLBLO1_CCA_WIDTH 2
> > +#define CSR_TLBLO1_CCA (_ULCAST_(0x3) << CSR_TLBLO1_CCA_SHIFT)
> > +#define CSR_TLBLO1_PLV_SHIFT 2
> > +#define CSR_TLBLO1_PLV_WIDTH 2
> > +#define CSR_TLBLO1_PLV (_ULCAST_(0x3) << CSR_TLBLO1_PLV_SHIFT)
> > +#define CSR_TLBLO1_WE_SHIFT 1
> > +#define CSR_TLBLO1_WE (_ULCAST_(0x1) << CSR_TLBLO1_WE_SHIFT)
> > +#define CSR_TLBLO1_V_SHIFT 0
> > +#define CSR_TLBLO1_V (_ULCAST_(0x1) << CSR_TLBLO1_V_SHIFT)
> > +
> > +#define LOONGARCH_CSR_GTLBC 0x15 /* Guest TLB control */
> > +#define CSR_GTLBC_RID_SHIFT 16
> > +#define CSR_GTLBC_RID_WIDTH 8
> > +#define CSR_GTLBC_RID (_ULCAST_(0xff) << CSR_GTLBC_RID_SHIFT)
> > +#define CSR_GTLBC_TOTI_SHIFT 13
> > +#define CSR_GTLBC_TOTI (_ULCAST_(0x1) << CSR_GTLBC_TOTI_SHIFT)
> > +#define CSR_GTLBC_USERID_SHIFT 12
> > +#define CSR_GTLBC_USERID (_ULCAST_(0x1) << CSR_GTLBC_USERID_SHIFT)
> > +#define CSR_GTLBC_GMTLBSZ_SHIFT 0
> > +#define CSR_GTLBC_GMTLBSZ_WIDTH 6
> > +#define CSR_GTLBC_GMTLBSZ (_ULCAST_(0x3f) << CSR_GTLBC_GMTLBSZ_SHIFT)
> > +
> > +#define LOONGARCH_CSR_TRGP 0x16 /* TLBR read guest info */
> > +#define CSR_TRGP_RID_SHIFT 16
> > +#define CSR_TRGP_RID_WIDTH 8
> > +#define CSR_TRGP_RID (_ULCAST_(0xff) << CSR_TRGP_RID_SHIFT)
> > +#define CSR_TRGP_GTLB_SHIFT 0
> > +#define CSR_TRGP_GTLB (1 << CSR_TRGP_GTLB_SHIFT)
> > +
> > +#define LOONGARCH_CSR_ASID 0x18 /* ASID */
> > +#define CSR_ASID_BIT_SHIFT 16 /* ASIDBits */
> > +#define CSR_ASID_BIT_WIDTH 8
> > +#define CSR_ASID_BIT (_ULCAST_(0xff) << CSR_ASID_BIT_SHIFT)
> > +#define CSR_ASID_ASID_SHIFT 0
> > +#define CSR_ASID_ASID_WIDTH 10
> > +#define CSR_ASID_ASID (_ULCAST_(0x3ff) << CSR_ASID_ASID_SHIFT)
> > +
> > +#define LOONGARCH_CSR_PGDL 0x19 /* Page table base address when VA[47] = 0 */
> > +
> > +#define LOONGARCH_CSR_PGDH 0x1a /* Page table base address when VA[47] = 1 */
> > +
> > +#define LOONGARCH_CSR_PGD 0x1b /* Page table base */
> > +
> > +#define LOONGARCH_CSR_PWCTL0 0x1c /* PWCtl0 */
> > +#define CSR_PWCTL0_PTEW_SHIFT 30
> > +#define CSR_PWCTL0_PTEW_WIDTH 2
> > +#define CSR_PWCTL0_PTEW (_ULCAST_(0x3) << CSR_PWCTL0_PTEW_SHIFT)
> > +#define CSR_PWCTL0_DIR1WIDTH_SHIFT 25
> > +#define CSR_PWCTL0_DIR1WIDTH_WIDTH 5
> > +#define CSR_PWCTL0_DIR1WIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_DIR1WIDTH_SHIFT)
> > +#define CSR_PWCTL0_DIR1BASE_SHIFT 20
> > +#define CSR_PWCTL0_DIR1BASE_WIDTH 5
> > +#define CSR_PWCTL0_DIR1BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR1BASE_SHIFT)
> > +#define CSR_PWCTL0_DIR0WIDTH_SHIFT 15
> > +#define CSR_PWCTL0_DIR0WIDTH_WIDTH 5
> > +#define CSR_PWCTL0_DIR0WIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_DIR0WIDTH_SHIFT)
> > +#define CSR_PWCTL0_DIR0BASE_SHIFT 10
> > +#define CSR_PWCTL0_DIR0BASE_WIDTH 5
> > +#define CSR_PWCTL0_DIR0BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR0BASE_SHIFT)
> > +#define CSR_PWCTL0_PTWIDTH_SHIFT 5
> > +#define CSR_PWCTL0_PTWIDTH_WIDTH 5
> > +#define CSR_PWCTL0_PTWIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_PTWIDTH_SHIFT)
> > +#define CSR_PWCTL0_PTBASE_SHIFT 0
> > +#define CSR_PWCTL0_PTBASE_WIDTH 5
> > +#define CSR_PWCTL0_PTBASE (_ULCAST_(0x1f) << CSR_PWCTL0_PTBASE_SHIFT)
> > +
> > +#define LOONGARCH_CSR_PWCTL1 0x1d /* PWCtl1 */
> > +#define CSR_PWCTL1_DIR3WIDTH_SHIFT 18
> > +#define CSR_PWCTL1_DIR3WIDTH_WIDTH 5
> > +#define CSR_PWCTL1_DIR3WIDTH (_ULCAST_(0x1f) << CSR_PWCTL1_DIR3WIDTH_SHIFT)
> > +#define CSR_PWCTL1_DIR3BASE_SHIFT 12
> > +#define CSR_PWCTL1_DIR3BASE_WIDTH 5
> > +#define CSR_PWCTL1_DIR3BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR3BASE_SHIFT)
> > +#define CSR_PWCTL1_DIR2WIDTH_SHIFT 6
> > +#define CSR_PWCTL1_DIR2WIDTH_WIDTH 5
> > +#define CSR_PWCTL1_DIR2WIDTH (_ULCAST_(0x1f) << CSR_PWCTL1_DIR2WIDTH_SHIFT)
> > +#define CSR_PWCTL1_DIR2BASE_SHIFT 0
> > +#define CSR_PWCTL1_DIR2BASE_WIDTH 5
> > +#define CSR_PWCTL1_DIR2BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR2BASE_SHIFT)
> > +
> > +#define LOONGARCH_CSR_STLBPGSIZE 0x1e
> > +#define CSR_STLBPGSIZE_PS_WIDTH 6
> > +#define CSR_STLBPGSIZE_PS (_ULCAST_(0x3f))
> > +
> > +#define LOONGARCH_CSR_RVACFG 0x1f
> > +#define CSR_RVACFG_RDVA_WIDTH 4
> > +#define CSR_RVACFG_RDVA (_ULCAST_(0xf))
> > +
> > +/* Config CSR registers */
> > +#define LOONGARCH_CSR_CPUID 0x20 /* CPU core id */
> > +#define CSR_CPUID_COREID_WIDTH 9
> > +#define CSR_CPUID_COREID _ULCAST_(0x1ff)
> > +
> > +#define LOONGARCH_CSR_PRCFG1 0x21 /* Config1 */
> > +#define CSR_CONF1_VSMAX_SHIFT 12
> > +#define CSR_CONF1_VSMAX_WIDTH 3
> > +#define CSR_CONF1_VSMAX (_ULCAST_(7) << CSR_CONF1_VSMAX_SHIFT)
> > +#define CSR_CONF1_TMRBITS_SHIFT 4
> > +#define CSR_CONF1_TMRBITS_WIDTH 8
> > +#define CSR_CONF1_TMRBITS (_ULCAST_(0xff) << CSR_CONF1_TMRBITS_SHIFT)
> > +#define CSR_CONF1_KSNUM_WIDTH 4
> > +#define CSR_CONF1_KSNUM _ULCAST_(0xf)
> > +
> > +#define LOONGARCH_CSR_PRCFG2 0x22 /* Config2 */
> > +#define CSR_CONF2_PGMASK_SUPP 0x3ffff000
> > +
> > +#define LOONGARCH_CSR_PRCFG3 0x23 /* Config3 */
> > +#define CSR_CONF3_STLBIDX_SHIFT 20
> > +#define CSR_CONF3_STLBIDX_WIDTH 6
> > +#define CSR_CONF3_STLBIDX (_ULCAST_(0x3f) << CSR_CONF3_STLBIDX_SHIFT)
> > +#define CSR_CONF3_STLBWAYS_SHIFT 12
> > +#define CSR_CONF3_STLBWAYS_WIDTH 8
> > +#define CSR_CONF3_STLBWAYS (_ULCAST_(0xff) << CSR_CONF3_STLBWAYS_SHIFT)
> > +#define CSR_CONF3_MTLBSIZE_SHIFT 4
> > +#define CSR_CONF3_MTLBSIZE_WIDTH 8
> > +#define CSR_CONF3_MTLBSIZE (_ULCAST_(0xff) << CSR_CONF3_MTLBSIZE_SHIFT)
> > +#define CSR_CONF3_TLBTYPE_SHIFT 0
> > +#define CSR_CONF3_TLBTYPE_WIDTH 4
> > +#define CSR_CONF3_TLBTYPE (_ULCAST_(0xf) << CSR_CONF3_TLBTYPE_SHIFT)
> > +
> > +/* Kscratch registers */
> > +#define LOONGARCH_CSR_KS0 0x30
> > +#define LOONGARCH_CSR_KS1 0x31
> > +#define LOONGARCH_CSR_KS2 0x32
> > +#define LOONGARCH_CSR_KS3 0x33
> > +#define LOONGARCH_CSR_KS4 0x34
> > +#define LOONGARCH_CSR_KS5 0x35
> > +#define LOONGARCH_CSR_KS6 0x36
> > +#define LOONGARCH_CSR_KS7 0x37
> > +#define LOONGARCH_CSR_KS8 0x38
> > +
> > +/* Exception allocated KS0, KS1 and KS2 statically */
> > +#define EXCEPTION_KS0 LOONGARCH_CSR_KS0
> > +#define EXCEPTION_KS1 LOONGARCH_CSR_KS1
> > +#define EXCEPTION_KS2 LOONGARCH_CSR_KS2
> > +#define EXC_KSCRATCH_MASK (1 << 0 | 1 << 1 | 1 << 2)
> > +
> > +/* Percpu-data base allocated KS3 statically */
> > +#define PERCPU_BASE_KS LOONGARCH_CSR_KS3
> > +#define PERCPU_KSCRATCH_MASK (1 << 3)
> > +
> > +/* KVM allocated KS4 and KS5 statically */
> > +#define KVM_VCPU_KS LOONGARCH_CSR_KS4
> > +#define KVM_TEMP_KS LOONGARCH_CSR_KS5
> > +#define KVM_KSCRATCH_MASK (1 << 4 | 1 << 5)
> > +
> > +/* Timer registers */
> > +#define LOONGARCH_CSR_TMID 0x40 /* Timer ID */
> > +
> > +#define LOONGARCH_CSR_TCFG 0x41 /* Timer config */
> > +#define CSR_TCFG_VAL_SHIFT 2
> > +#define CSR_TCFG_VAL_WIDTH 48
> > +#define CSR_TCFG_VAL (_ULCAST_(0x3fffffffffff) << CSR_TCFG_VAL_SHIFT)
> > +#define CSR_TCFG_PERIOD_SHIFT 1
> > +#define CSR_TCFG_PERIOD (_ULCAST_(0x1) << CSR_TCFG_PERIOD_SHIFT)
> > +#define CSR_TCFG_EN (_ULCAST_(0x1))
> > +
> > +#define LOONGARCH_CSR_TVAL 0x42 /* Timer value */
> > +
> > +#define LOONGARCH_CSR_CNTC 0x43 /* Timer offset */
> > +
> > +#define LOONGARCH_CSR_TINTCLR 0x44 /* Timer interrupt clear */
> > +#define CSR_TINTCLR_TI_SHIFT 0
> > +#define CSR_TINTCLR_TI (1 << CSR_TINTCLR_TI_SHIFT)
> > +
> > +/* Guest registers */
> > +#define LOONGARCH_CSR_GSTAT 0x50 /* Guest status */
> > +#define CSR_GSTAT_GID_SHIFT 16
> > +#define CSR_GSTAT_GID_WIDTH 8
> > +#define CSR_GSTAT_GID (_ULCAST_(0xff) << CSR_GSTAT_GID_SHIFT)
> > +#define CSR_GSTAT_GIDBIT_SHIFT 4
> > +#define CSR_GSTAT_GIDBIT_WIDTH 6
> > +#define CSR_GSTAT_GIDBIT (_ULCAST_(0x3f) << CSR_GSTAT_GIDBIT_SHIFT)
> > +#define CSR_GSTAT_PVM_SHIFT 1
> > +#define CSR_GSTAT_PVM (_ULCAST_(0x1) << CSR_GSTAT_PVM_SHIFT)
> > +#define CSR_GSTAT_VM_SHIFT 0
> > +#define CSR_GSTAT_VM (_ULCAST_(0x1) << CSR_GSTAT_VM_SHIFT)
> > +
> > +#define LOONGARCH_CSR_GCFG 0x51 /* Guest config */
> > +#define CSR_GCFG_GPERF_SHIFT 24
> > +#define CSR_GCFG_GPERF_WIDTH 3
> > +#define CSR_GCFG_GPERF (_ULCAST_(0x7) << CSR_GCFG_GPERF_SHIFT)
> > +#define CSR_GCFG_GCI_SHIFT 20
> > +#define CSR_GCFG_GCI_WIDTH 2
> > +#define CSR_GCFG_GCI (_ULCAST_(0x3) << CSR_GCFG_GCI_SHIFT)
> > +#define CSR_GCFG_GCI_ALL (_ULCAST_(0x0) << CSR_GCFG_GCI_SHIFT)
> > +#define CSR_GCFG_GCI_HIT (_ULCAST_(0x1) << CSR_GCFG_GCI_SHIFT)
> > +#define CSR_GCFG_GCI_SECURE (_ULCAST_(0x2) << CSR_GCFG_GCI_SHIFT)
> > +#define CSR_GCFG_GCIP_SHIFT 16
> > +#define CSR_GCFG_GCIP (_ULCAST_(0xf) << CSR_GCFG_GCIP_SHIFT)
> > +#define CSR_GCFG_GCIP_ALL (_ULCAST_(0x1) << CSR_GCFG_GCIP_SHIFT)
> > +#define CSR_GCFG_GCIP_HIT (_ULCAST_(0x1) << (CSR_GCFG_GCIP_SHIFT + 1))
> > +#define CSR_GCFG_GCIP_SECURE (_ULCAST_(0x1) << (CSR_GCFG_GCIP_SHIFT + 2))
> > +#define CSR_GCFG_TORU_SHIFT 15
> > +#define CSR_GCFG_TORU (_ULCAST_(0x1) << CSR_GCFG_TORU_SHIFT)
> > +#define CSR_GCFG_TORUP_SHIFT 14
> > +#define CSR_GCFG_TORUP (_ULCAST_(0x1) << CSR_GCFG_TORUP_SHIFT)
> > +#define CSR_GCFG_TOP_SHIFT 13
> > +#define CSR_GCFG_TOP (_ULCAST_(0x1) << CSR_GCFG_TOP_SHIFT)
> > +#define CSR_GCFG_TOPP_SHIFT 12
> > +#define CSR_GCFG_TOPP (_ULCAST_(0x1) << CSR_GCFG_TOPP_SHIFT)
> > +#define CSR_GCFG_TOE_SHIFT 11
> > +#define CSR_GCFG_TOE (_ULCAST_(0x1) << CSR_GCFG_TOE_SHIFT)
> > +#define CSR_GCFG_TOEP_SHIFT 10
> > +#define CSR_GCFG_TOEP (_ULCAST_(0x1) << CSR_GCFG_TOEP_SHIFT)
> > +#define CSR_GCFG_TIT_SHIFT 9
> > +#define CSR_GCFG_TIT (_ULCAST_(0x1) << CSR_GCFG_TIT_SHIFT)
> > +#define CSR_GCFG_TITP_SHIFT 8
> > +#define CSR_GCFG_TITP (_ULCAST_(0x1) << CSR_GCFG_TITP_SHIFT)
> > +#define CSR_GCFG_SIT_SHIFT 7
> > +#define CSR_GCFG_SIT (_ULCAST_(0x1) << CSR_GCFG_SIT_SHIFT)
> > +#define CSR_GCFG_SITP_SHIFT 6
> > +#define CSR_GCFG_SITP (_ULCAST_(0x1) << CSR_GCFG_SITP_SHIFT)
> > +#define CSR_GCFG_MATC_SHITF 4
> > +#define CSR_GCFG_MATC_WIDTH 2
> > +#define CSR_GCFG_MATC_MASK (_ULCAST_(0x3) << CSR_GCFG_MATC_SHITF)
> > +#define CSR_GCFG_MATC_GUEST (_ULCAST_(0x0) << CSR_GCFG_MATC_SHITF)
> > +#define CSR_GCFG_MATC_ROOT (_ULCAST_(0x1) << CSR_GCFG_MATC_SHITF)
> > +#define CSR_GCFG_MATC_NEST (_ULCAST_(0x2) << CSR_GCFG_MATC_SHITF)
> > +
> > +#define LOONGARCH_CSR_GINTC 0x52 /* Guest interrupt control */
> > +#define CSR_GINTC_HC_SHIFT 16
> > +#define CSR_GINTC_HC_WIDTH 8
> > +#define CSR_GINTC_HC (_ULCAST_(0xff) << CSR_GINTC_HC_SHIFT)
> > +#define CSR_GINTC_PIP_SHIFT 8
> > +#define CSR_GINTC_PIP_WIDTH 8
> > +#define CSR_GINTC_PIP (_ULCAST_(0xff) << CSR_GINTC_PIP_SHIFT)
> > +#define CSR_GINTC_VIP_SHIFT 0
> > +#define CSR_GINTC_VIP_WIDTH 8
> > +#define CSR_GINTC_VIP (_ULCAST_(0xff))
> > +
> > +#define LOONGARCH_CSR_GCNTC 0x53 /* Guest timer offset */
> > +
> > +/* LLBCTL register */
> > +#define LOONGARCH_CSR_LLBCTL 0x60 /* LLBit control */
> > +#define CSR_LLBCTL_ROLLB_SHIFT 0
> > +#define CSR_LLBCTL_ROLLB (_ULCAST_(1) << CSR_LLBCTL_ROLLB_SHIFT)
> > +#define CSR_LLBCTL_WCLLB_SHIFT 1
> > +#define CSR_LLBCTL_WCLLB (_ULCAST_(1) << CSR_LLBCTL_WCLLB_SHIFT)
> > +#define CSR_LLBCTL_KLO_SHIFT 2
> > +#define CSR_LLBCTL_KLO (_ULCAST_(1) << CSR_LLBCTL_KLO_SHIFT)
> > +
> > +/* Implement dependent */
> > +#define LOONGARCH_CSR_IMPCTL1 0x80 /* Loongson config1 */
> > +#define CSR_MISPEC_SHIFT 20
> > +#define CSR_MISPEC_WIDTH 8
> > +#define CSR_MISPEC (_ULCAST_(0xff) << CSR_MISPEC_SHIFT)
> > +#define CSR_SSEN_SHIFT 18
> > +#define CSR_SSEN (_ULCAST_(1) << CSR_SSEN_SHIFT)
> > +#define CSR_SCRAND_SHIFT 17
> > +#define CSR_SCRAND (_ULCAST_(1) << CSR_SCRAND_SHIFT)
> > +#define CSR_LLEXCL_SHIFT 16
> > +#define CSR_LLEXCL (_ULCAST_(1) << CSR_LLEXCL_SHIFT)
> > +#define CSR_DISVC_SHIFT 15
> > +#define CSR_DISVC (_ULCAST_(1) << CSR_DISVC_SHIFT)
> > +#define CSR_VCLRU_SHIFT 14
> > +#define CSR_VCLRU (_ULCAST_(1) << CSR_VCLRU_SHIFT)
> > +#define CSR_DCLRU_SHIFT 13
> > +#define CSR_DCLRU (_ULCAST_(1) << CSR_DCLRU_SHIFT)
> > +#define CSR_FASTLDQ_SHIFT 12
> > +#define CSR_FASTLDQ (_ULCAST_(1) << CSR_FASTLDQ_SHIFT)
> > +#define CSR_USERCAC_SHIFT 11
> > +#define CSR_USERCAC (_ULCAST_(1) << CSR_USERCAC_SHIFT)
> > +#define CSR_ANTI_MISPEC_SHIFT 10
> > +#define CSR_ANTI_MISPEC (_ULCAST_(1) << CSR_ANTI_MISPEC_SHIFT)
> > +#define CSR_AUTO_FLUSHSFB_SHIFT 9
> > +#define CSR_AUTO_FLUSHSFB (_ULCAST_(1) << CSR_AUTO_FLUSHSFB_SHIFT)
> > +#define CSR_STFILL_SHIFT 8
> > +#define CSR_STFILL (_ULCAST_(1) << CSR_STFILL_SHIFT)
> > +#define CSR_LIFEP_SHIFT 7
> > +#define CSR_LIFEP (_ULCAST_(1) << CSR_LIFEP_SHIFT)
> > +#define CSR_LLSYNC_SHIFT 6
> > +#define CSR_LLSYNC (_ULCAST_(1) << CSR_LLSYNC_SHIFT)
> > +#define CSR_BRBTDIS_SHIFT 5
> > +#define CSR_BRBTDIS (_ULCAST_(1) << CSR_BRBTDIS_SHIFT)
> > +#define CSR_RASDIS_SHIFT 4
> > +#define CSR_RASDIS (_ULCAST_(1) << CSR_RASDIS_SHIFT)
> > +#define CSR_STPRE_SHIFT 2
> > +#define CSR_STPRE_WIDTH 2
> > +#define CSR_STPRE (_ULCAST_(3) << CSR_STPRE_SHIFT)
> > +#define CSR_INSTPRE_SHIFT 1
> > +#define CSR_INSTPRE (_ULCAST_(1) << CSR_INSTPRE_SHIFT)
> > +#define CSR_DATAPRE_SHIFT 0
> > +#define CSR_DATAPRE (_ULCAST_(1) << CSR_DATAPRE_SHIFT)
> > +
> > +#define LOONGARCH_CSR_IMPCTL2 0x81 /* Loongson config2 */
> > +#define CSR_FLUSH_MTLB_SHIFT 0
> > +#define CSR_FLUSH_MTLB (_ULCAST_(1) << CSR_FLUSH_MTLB_SHIFT)
> > +#define CSR_FLUSH_STLB_SHIFT 1
> > +#define CSR_FLUSH_STLB (_ULCAST_(1) << CSR_FLUSH_STLB_SHIFT)
> > +#define CSR_FLUSH_DTLB_SHIFT 2
> > +#define CSR_FLUSH_DTLB (_ULCAST_(1) << CSR_FLUSH_DTLB_SHIFT)
> > +#define CSR_FLUSH_ITLB_SHIFT 3
> > +#define CSR_FLUSH_ITLB (_ULCAST_(1) << CSR_FLUSH_ITLB_SHIFT)
> > +#define CSR_FLUSH_BTAC_SHIFT 4
> > +#define CSR_FLUSH_BTAC (_ULCAST_(1) << CSR_FLUSH_BTAC_SHIFT)
> > +
> > +#define LOONGARCH_CSR_GNMI 0x82
> > +
> > +/* TLB Refill registers */
> > +#define LOONGARCH_CSR_TLBRENTRY 0x88 /* TLB refill exception entry */
> > +#define LOONGARCH_CSR_TLBRBADV 0x89 /* TLB refill badvaddr */
> > +#define LOONGARCH_CSR_TLBRERA 0x8a /* TLB refill ERA */
> > +#define LOONGARCH_CSR_TLBRSAVE 0x8b /* KScratch for TLB refill exception */
> > +#define LOONGARCH_CSR_TLBRELO0 0x8c /* TLB refill entrylo0 */
> > +#define LOONGARCH_CSR_TLBRELO1 0x8d /* TLB refill entrylo1 */
> > +#define LOONGARCH_CSR_TLBREHI 0x8e /* TLB refill entryhi */
> > +#define CSR_TLBREHI_PS_SHIFT 0
> > +#define CSR_TLBREHI_PS (_ULCAST_(0x3f) << CSR_TLBREHI_PS_SHIFT)
> > +#define LOONGARCH_CSR_TLBRPRMD 0x8f /* TLB refill mode info */
> > +
> > +/* Machine Error registers */
> > +#define LOONGARCH_CSR_MERRCTL 0x90 /* MERRCTL */
> > +#define LOONGARCH_CSR_MERRINFO1 0x91 /* MError info1 */
> > +#define LOONGARCH_CSR_MERRINFO2 0x92 /* MError info2 */
> > +#define LOONGARCH_CSR_MERRENTRY 0x93 /* MError exception entry */
> > +#define LOONGARCH_CSR_MERRERA 0x94 /* MError exception ERA */
> > +#define LOONGARCH_CSR_MERRSAVE 0x95 /* KScratch for machine error exception */
> > +
> > +#define LOONGARCH_CSR_CTAG 0x98 /* TagLo + TagHi */
> > +
> > +#define LOONGARCH_CSR_PRID 0xc0
> > +
> > +/* Shadow MCSR : 0xc0 ~ 0xff */
> > +#define LOONGARCH_CSR_MCSR0 0xc0 /* CPUCFG0 and CPUCFG1 */
> > +#define MCSR0_INT_IMPL_SHIFT 58
> > +#define MCSR0_INT_IMPL 0
> > +#define MCSR0_IOCSR_BRD_SHIFT 57
> > +#define MCSR0_IOCSR_BRD (_ULCAST_(1) << MCSR0_IOCSR_BRD_SHIFT)
> > +#define MCSR0_HUGEPG_SHIFT 56
> > +#define MCSR0_HUGEPG (_ULCAST_(1) << MCSR0_HUGEPG_SHIFT)
> > +#define MCSR0_RPLMTLB_SHIFT 55
> > +#define MCSR0_RPLMTLB (_ULCAST_(1) << MCSR0_RPLMTLB_SHIFT)
> > +#define MCSR0_EP_SHIFT 54
> > +#define MCSR0_EP (_ULCAST_(1) << MCSR0_EP_SHIFT)
> > +#define MCSR0_RI_SHIFT 53
> > +#define MCSR0_RI (_ULCAST_(1) << MCSR0_RI_SHIFT)
> > +#define MCSR0_UAL_SHIFT 52
> > +#define MCSR0_UAL (_ULCAST_(1) << MCSR0_UAL_SHIFT)
> > +#define MCSR0_VABIT_SHIFT 44
> > +#define MCSR0_VABIT_WIDTH 8
> > +#define MCSR0_VABIT (_ULCAST_(0xff) << MCSR0_VABIT_SHIFT)
> > +#define VABIT_DEFAULT 0x2f
> > +#define MCSR0_PABIT_SHIFT 36
> > +#define MCSR0_PABIT_WIDTH 8
> > +#define MCSR0_PABIT (_ULCAST_(0xff) << MCSR0_PABIT_SHIFT)
> > +#define PABIT_DEFAULT 0x2f
> > +#define MCSR0_IOCSR_SHIFT 35
> > +#define MCSR0_IOCSR (_ULCAST_(1) << MCSR0_IOCSR_SHIFT)
> > +#define MCSR0_PAGING_SHIFT 34
> > +#define MCSR0_PAGING (_ULCAST_(1) << MCSR0_PAGING_SHIFT)
> > +#define MCSR0_GR64_SHIFT 33
> > +#define MCSR0_GR64 (_ULCAST_(1) << MCSR0_GR64_SHIFT)
> > +#define GR64_DEFAULT 1
> > +#define MCSR0_GR32_SHIFT 32
> > +#define MCSR0_GR32 (_ULCAST_(1) << MCSR0_GR32_SHIFT)
> > +#define GR32_DEFAULT 0
> > +#define MCSR0_PRID_WIDTH 32
> > +#define MCSR0_PRID 0x14C010
> > +
> > +#define LOONGARCH_CSR_MCSR1 0xc1 /* CPUCFG2 and CPUCFG3 */
> > +#define MCSR1_HPFOLD_SHIFT 43
> > +#define MCSR1_HPFOLD (_ULCAST_(1) << MCSR1_HPFOLD_SHIFT)
> > +#define MCSR1_SPW_LVL_SHIFT 40
> > +#define MCSR1_SPW_LVL_WIDTH 3
> > +#define MCSR1_SPW_LVL (_ULCAST_(7) << MCSR1_SPW_LVL_SHIFT)
> > +#define MCSR1_ICACHET_SHIFT 39
> > +#define MCSR1_ICACHET (_ULCAST_(1) << MCSR1_ICACHET_SHIFT)
> > +#define MCSR1_ITLBT_SHIFT 38
> > +#define MCSR1_ITLBT (_ULCAST_(1) << MCSR1_ITLBT_SHIFT)
> > +#define MCSR1_LLDBAR_SHIFT 37
> > +#define MCSR1_LLDBAR (_ULCAST_(1) << MCSR1_LLDBAR_SHIFT)
> > +#define MCSR1_SCDLY_SHIFT 36
> > +#define MCSR1_SCDLY (_ULCAST_(1) << MCSR1_SCDLY_SHIFT)
> > +#define MCSR1_LLEXC_SHIFT 35
> > +#define MCSR1_LLEXC (_ULCAST_(1) << MCSR1_LLEXC_SHIFT)
> > +#define MCSR1_UCACC_SHIFT 34
> > +#define MCSR1_UCACC (_ULCAST_(1) << MCSR1_UCACC_SHIFT)
> > +#define MCSR1_SFB_SHIFT 33
> > +#define MCSR1_SFB (_ULCAST_(1) << MCSR1_SFB_SHIFT)
> > +#define MCSR1_CCDMA_SHIFT 32
> > +#define MCSR1_CCDMA (_ULCAST_(1) << MCSR1_CCDMA_SHIFT)
> > +#define MCSR1_LAMO_SHIFT 22
> > +#define MCSR1_LAMO (_ULCAST_(1) << MCSR1_LAMO_SHIFT)
> > +#define MCSR1_LSPW_SHIFT 21
> > +#define MCSR1_LSPW (_ULCAST_(1) << MCSR1_LSPW_SHIFT)
> > +#define MCSR1_MIPSBT_SHIFT 20
> > +#define MCSR1_MIPSBT (_ULCAST_(1) << MCSR1_MIPSBT_SHIFT)
> > +#define MCSR1_ARMBT_SHIFT 19
> > +#define MCSR1_ARMBT (_ULCAST_(1) << MCSR1_ARMBT_SHIFT)
> > +#define MCSR1_X86BT_SHIFT 18
> > +#define MCSR1_X86BT (_ULCAST_(1) << MCSR1_X86BT_SHIFT)
> > +#define MCSR1_LLFTPVERS_SHIFT 15
> > +#define MCSR1_LLFTPVERS_WIDTH 3
> > +#define MCSR1_LLFTPVERS (_ULCAST_(7) << MCSR1_LLFTPVERS_SHIFT)
> > +#define MCSR1_LLFTP_SHIFT 14
> > +#define MCSR1_LLFTP (_ULCAST_(1) << MCSR1_LLFTP_SHIFT)
> > +#define MCSR1_VZVERS_SHIFT 11
> > +#define MCSR1_VZVERS_WIDTH 3
> > +#define MCSR1_VZVERS (_ULCAST_(7) << MCSR1_VZVERS_SHIFT)
> > +#define MCSR1_VZ_SHIFT 10
> > +#define MCSR1_VZ (_ULCAST_(1) << MCSR1_VZ_SHIFT)
> > +#define MCSR1_CRYPTO_SHIFT 9
> > +#define MCSR1_CRYPTO (_ULCAST_(1) << MCSR1_CRYPTO_SHIFT)
> > +#define MCSR1_COMPLEX_SHIFT 8
> > +#define MCSR1_COMPLEX (_ULCAST_(1) << MCSR1_COMPLEX_SHIFT)
> > +#define MCSR1_LASX_SHIFT 7
> > +#define MCSR1_LASX (_ULCAST_(1) << MCSR1_LASX_SHIFT)
> > +#define MCSR1_LSX_SHIFT 6
> > +#define MCSR1_LSX (_ULCAST_(1) << MCSR1_LSX_SHIFT)
> > +#define MCSR1_FPVERS_SHIFT 3
> > +#define MCSR1_FPVERS_WIDTH 3
> > +#define MCSR1_FPVERS (_ULCAST_(7) << MCSR1_FPVERS_SHIFT)
> > +#define MCSR1_FPDP_SHIFT 2
> > +#define MCSR1_FPDP (_ULCAST_(1) << MCSR1_FPDP_SHIFT)
> > +#define MCSR1_FPSP_SHIFT 1
> > +#define MCSR1_FPSP (_ULCAST_(1) << MCSR1_FPSP_SHIFT)
> > +#define MCSR1_FP_SHIFT 0
> > +#define MCSR1_FP (_ULCAST_(1) << MCSR1_FP_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MCSR2 0xc2 /* CPUCFG4 and CPUCFG5 */
> > +#define MCSR2_CCDIV_SHIFT 48
> > +#define MCSR2_CCDIV_WIDTH 16
> > +#define MCSR2_CCDIV (_ULCAST_(0xffff) << MCSR2_CCDIV_SHIFT)
> > +#define MCSR2_CCMUL_SHIFT 32
> > +#define MCSR2_CCMUL_WIDTH 16
> > +#define MCSR2_CCMUL (_ULCAST_(0xffff) << MCSR2_CCMUL_SHIFT)
> > +#define MCSR2_CCFREQ_WIDTH 32
> > +#define MCSR2_CCFREQ (_ULCAST_(0xffffffff))
> > +#define CCFREQ_DEFAULT 0x5f5e100 /* 100MHz */
> > +
> > +#define LOONGARCH_CSR_MCSR3 0xc3 /* CPUCFG6 */
> > +#define MCSR3_UPM_SHIFT 14
> > +#define MCSR3_UPM (_ULCAST_(1) << MCSR3_UPM_SHIFT)
> > +#define MCSR3_PMBITS_SHIFT 8
> > +#define MCSR3_PMBITS_WIDTH 6
> > +#define MCSR3_PMBITS (_ULCAST_(0x3f) << MCSR3_PMBITS_SHIFT)
> > +#define PMBITS_DEFAULT 0x40
> > +#define MCSR3_PMNUM_SHIFT 4
> > +#define MCSR3_PMNUM_WIDTH 4
> > +#define MCSR3_PMNUM (_ULCAST_(0xf) << MCSR3_PMNUM_SHIFT)
> > +#define MCSR3_PAMVER_SHIFT 1
> > +#define MCSR3_PAMVER_WIDTH 3
> > +#define MCSR3_PAMVER (_ULCAST_(0x7) << MCSR3_PAMVER_SHIFT)
> > +#define MCSR3_PMP_SHIFT 0
> > +#define MCSR3_PMP (_ULCAST_(1) << MCSR3_PMP_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MCSR8 0xc8 /* CPUCFG16 and CPUCFG17 */
> > +#define MCSR8_L1I_SIZE_SHIFT 56
> > +#define MCSR8_L1I_SIZE_WIDTH 7
> > +#define MCSR8_L1I_SIZE (_ULCAST_(0x7f) << MCSR8_L1I_SIZE_SHIFT)
> > +#define MCSR8_L1I_IDX_SHIFT 48
> > +#define MCSR8_L1I_IDX_WIDTH 8
> > +#define MCSR8_L1I_IDX (_ULCAST_(0xff) << MCSR8_L1I_IDX_SHIFT)
> > +#define MCSR8_L1I_WAY_SHIFT 32
> > +#define MCSR8_L1I_WAY_WIDTH 16
> > +#define MCSR8_L1I_WAY (_ULCAST_(0xffff) << MCSR8_L1I_WAY_SHIFT)
> > +#define MCSR8_L3DINCL_SHIFT 16
> > +#define MCSR8_L3DINCL (_ULCAST_(1) << MCSR8_L3DINCL_SHIFT)
> > +#define MCSR8_L3DPRIV_SHIFT 15
> > +#define MCSR8_L3DPRIV (_ULCAST_(1) << MCSR8_L3DPRIV_SHIFT)
> > +#define MCSR8_L3DPRE_SHIFT 14
> > +#define MCSR8_L3DPRE (_ULCAST_(1) << MCSR8_L3DPRE_SHIFT)
> > +#define MCSR8_L3IUINCL_SHIFT 13
> > +#define MCSR8_L3IUINCL (_ULCAST_(1) << MCSR8_L3IUINCL_SHIFT)
> > +#define MCSR8_L3IUPRIV_SHIFT 12
> > +#define MCSR8_L3IUPRIV (_ULCAST_(1) << MCSR8_L3IUPRIV_SHIFT)
> > +#define MCSR8_L3IUUNIFY_SHIFT 11
> > +#define MCSR8_L3IUUNIFY (_ULCAST_(1) << MCSR8_L3IUUNIFY_SHIFT)
> > +#define MCSR8_L3IUPRE_SHIFT 10
> > +#define MCSR8_L3IUPRE (_ULCAST_(1) << MCSR8_L3IUPRE_SHIFT)
> > +#define MCSR8_L2DINCL_SHIFT 9
> > +#define MCSR8_L2DINCL (_ULCAST_(1) << MCSR8_L2DINCL_SHIFT)
> > +#define MCSR8_L2DPRIV_SHIFT 8
> > +#define MCSR8_L2DPRIV (_ULCAST_(1) << MCSR8_L2DPRIV_SHIFT)
> > +#define MCSR8_L2DPRE_SHIFT 7
> > +#define MCSR8_L2DPRE (_ULCAST_(1) << MCSR8_L2DPRE_SHIFT)
> > +#define MCSR8_L2IUINCL_SHIFT 6
> > +#define MCSR8_L2IUINCL (_ULCAST_(1) << MCSR8_L2IUINCL_SHIFT)
> > +#define MCSR8_L2IUPRIV_SHIFT 5
> > +#define MCSR8_L2IUPRIV (_ULCAST_(1) << MCSR8_L2IUPRIV_SHIFT)
> > +#define MCSR8_L2IUUNIFY_SHIFT 4
> > +#define MCSR8_L2IUUNIFY (_ULCAST_(1) << MCSR8_L2IUUNIFY_SHIFT)
> > +#define MCSR8_L2IUPRE_SHIFT 3
> > +#define MCSR8_L2IUPRE (_ULCAST_(1) << MCSR8_L2IUPRE_SHIFT)
> > +#define MCSR8_L1DPRE_SHIFT 2
> > +#define MCSR8_L1DPRE (_ULCAST_(1) << MCSR8_L1DPRE_SHIFT)
> > +#define MCSR8_L1IUUNIFY_SHIFT 1
> > +#define MCSR8_L1IUUNIFY (_ULCAST_(1) << MCSR8_L1IUUNIFY_SHIFT)
> > +#define MCSR8_L1IUPRE_SHIFT 0
> > +#define MCSR8_L1IUPRE (_ULCAST_(1) << MCSR8_L1IUPRE_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MCSR9 0xc9 /* CPUCFG18 and CPUCFG19 */
> > +#define MCSR9_L2U_SIZE_SHIFT 56
> > +#define MCSR9_L2U_SIZE_WIDTH 7
> > +#define MCSR9_L2U_SIZE (_ULCAST_(0x7f) << MCSR9_L2U_SIZE_SHIFT)
> > +#define MCSR9_L2U_IDX_SHIFT 48
> > +#define MCSR9_L2U_IDX_WIDTH 8
> > +#define MCSR9_L2U_IDX (_ULCAST_(0xff) << MCSR9_IDX_LOG_SHIFT)
> > +#define MCSR9_L2U_WAY_SHIFT 32
> > +#define MCSR9_L2U_WAY_WIDTH 16
> > +#define MCSR9_L2U_WAY (_ULCAST_(0xffff) << MCSR9_L2U_WAY_SHIFT)
> > +#define MCSR9_L1D_SIZE_SHIFT 24
> > +#define MCSR9_L1D_SIZE_WIDTH 7
> > +#define MCSR9_L1D_SIZE (_ULCAST_(0x7f) << MCSR9_L1D_SIZE_SHIFT)
> > +#define MCSR9_L1D_IDX_SHIFT 16
> > +#define MCSR9_L1D_IDX_WIDTH 8
> > +#define MCSR9_L1D_IDX (_ULCAST_(0xff) << MCSR9_L1D_IDX_SHIFT)
> > +#define MCSR9_L1D_WAY_SHIFT 0
> > +#define MCSR9_L1D_WAY_WIDTH 16
> > +#define MCSR9_L1D_WAY (_ULCAST_(0xffff) << MCSR9_L1D_WAY_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MCSR10 0xca /* CPUCFG20 */
> > +#define MCSR10_L3U_SIZE_SHIFT 24
> > +#define MCSR10_L3U_SIZE_WIDTH 7
> > +#define MCSR10_L3U_SIZE (_ULCAST_(0x7f) << MCSR10_L3U_SIZE_SHIFT)
> > +#define MCSR10_L3U_IDX_SHIFT 16
> > +#define MCSR10_L3U_IDX_WIDTH 8
> > +#define MCSR10_L3U_IDX (_ULCAST_(0xff) << MCSR10_L3U_IDX_SHIFT)
> > +#define MCSR10_L3U_WAY_SHIFT 0
> > +#define MCSR10_L3U_WAY_WIDTH 16
> > +#define MCSR10_L3U_WAY (_ULCAST_(0xffff) << MCSR10_L3U_WAY_SHIFT)
> > +
> > +#define LOONGARCH_CSR_MCSR24 0xf0 /* cpucfg48 */
> > +#define MCSR24_RAMCG_SHIFT 3
> > +#define MCSR24_RAMCG (_ULCAST_(1) << MCSR24_RAMCG_SHIFT)
> > +#define MCSR24_VFPUCG_SHIFT 2
> > +#define MCSR24_VFPUCG (_ULCAST_(1) << MCSR24_VFPUCG_SHIFT)
> > +#define MCSR24_NAPEN_SHIFT 1
> > +#define MCSR24_NAPEN (_ULCAST_(1) << MCSR24_NAPEN_SHIFT)
> > +#define MCSR24_MCSRLOCK_SHIFT 0
> > +#define MCSR24_MCSRLOCK (_ULCAST_(1) << MCSR24_MCSRLOCK_SHIFT)
> > +
> > +/* Uncached accelerate windows registers */
> > +#define LOONGARCH_CSR_UCAWIN 0x100
> > +#define LOONGARCH_CSR_UCAWIN0_LO 0x102
> > +#define LOONGARCH_CSR_UCAWIN0_HI 0x103
> > +#define LOONGARCH_CSR_UCAWIN1_LO 0x104
> > +#define LOONGARCH_CSR_UCAWIN1_HI 0x105
> > +#define LOONGARCH_CSR_UCAWIN2_LO 0x106
> > +#define LOONGARCH_CSR_UCAWIN2_HI 0x107
> > +#define LOONGARCH_CSR_UCAWIN3_LO 0x108
> > +#define LOONGARCH_CSR_UCAWIN3_HI 0x109
> > +
> > +/* Direct Map windows registers */
> > +#define LOONGARCH_CSR_DMWIN0 0x180 /* 64 direct map win0: MEM & IF */
> > +#define LOONGARCH_CSR_DMWIN1 0x181 /* 64 direct map win1: MEM & IF */
> > +#define LOONGARCH_CSR_DMWIN2 0x182 /* 64 direct map win2: MEM */
> > +#define LOONGARCH_CSR_DMWIN3 0x183 /* 64 direct map win3: MEM */
> > +
> > +/* Direct Map window 0/1 */
> > +#define CSR_DMW0_PLV0 _CONST64_(1 << 0)
> > +#define CSR_DMW0_VSEG _CONST64_(0x8000)
> > +#define CSR_DMW0_BASE (CSR_DMW0_VSEG << DMW_PABITS)
> > +#define CSR_DMW0_INIT (CSR_DMW0_BASE | CSR_DMW0_PLV0)
> > +
> > +#define CSR_DMW1_PLV0 _CONST64_(1 << 0)
> > +#define CSR_DMW1_MAT _CONST64_(1 << 4)
> > +#define CSR_DMW1_VSEG _CONST64_(0x9000)
> > +#define CSR_DMW1_BASE (CSR_DMW1_VSEG << DMW_PABITS)
> > +#define CSR_DMW1_INIT (CSR_DMW1_BASE | CSR_DMW1_MAT | CSR_DMW1_PLV0)
> > +
> > +/* Performance Counter registers */
> > +#define LOONGARCH_CSR_PERFCTRL0 0x200 /* 32 perf event 0 config */
> > +#define LOONGARCH_CSR_PERFCNTR0 0x201 /* 64 perf event 0 count value */
> > +#define LOONGARCH_CSR_PERFCTRL1 0x202 /* 32 perf event 1 config */
> > +#define LOONGARCH_CSR_PERFCNTR1 0x203 /* 64 perf event 1 count value */
> > +#define LOONGARCH_CSR_PERFCTRL2 0x204 /* 32 perf event 2 config */
> > +#define LOONGARCH_CSR_PERFCNTR2 0x205 /* 64 perf event 2 count value */
> > +#define LOONGARCH_CSR_PERFCTRL3 0x206 /* 32 perf event 3 config */
> > +#define LOONGARCH_CSR_PERFCNTR3 0x207 /* 64 perf event 3 count value */
> > +#define CSR_PERFCTRL_PLV0 (_ULCAST_(1) << 16)
> > +#define CSR_PERFCTRL_PLV1 (_ULCAST_(1) << 17)
> > +#define CSR_PERFCTRL_PLV2 (_ULCAST_(1) << 18)
> > +#define CSR_PERFCTRL_PLV3 (_ULCAST_(1) << 19)
> > +#define CSR_PERFCTRL_IE (_ULCAST_(1) << 20)
> > +#define CSR_PERFCTRL_EVENT 0x3ff
> > +
> > +/* Debug registers */
> > +#define LOONGARCH_CSR_MWPC 0x300 /* data breakpoint config */
> > +#define LOONGARCH_CSR_MWPS 0x301 /* data breakpoint status */
> > +
> > +#define LOONGARCH_CSR_DB0ADDR 0x310 /* data breakpoint 0 address */
> > +#define LOONGARCH_CSR_DB0MASK 0x311 /* data breakpoint 0 mask */
> > +#define LOONGARCH_CSR_DB0CTL 0x312 /* data breakpoint 0 control */
> > +#define LOONGARCH_CSR_DB0ASID 0x313 /* data breakpoint 0 asid */
> > +
> > +#define LOONGARCH_CSR_DB1ADDR 0x318 /* data breakpoint 1 address */
> > +#define LOONGARCH_CSR_DB1MASK 0x319 /* data breakpoint 1 mask */
> > +#define LOONGARCH_CSR_DB1CTL 0x31a /* data breakpoint 1 control */
> > +#define LOONGARCH_CSR_DB1ASID 0x31b /* data breakpoint 1 asid */
> > +
> > +#define LOONGARCH_CSR_DB2ADDR 0x320 /* data breakpoint 2 address */
> > +#define LOONGARCH_CSR_DB2MASK 0x321 /* data breakpoint 2 mask */
> > +#define LOONGARCH_CSR_DB2CTL 0x322 /* data breakpoint 2 control */
> > +#define LOONGARCH_CSR_DB2ASID 0x323 /* data breakpoint 2 asid */
> > +
> > +#define LOONGARCH_CSR_DB3ADDR 0x328 /* data breakpoint 3 address */
> > +#define LOONGARCH_CSR_DB3MASK 0x329 /* data breakpoint 3 mask */
> > +#define LOONGARCH_CSR_DB3CTL 0x32a /* data breakpoint 3 control */
> > +#define LOONGARCH_CSR_DB3ASID 0x32b /* data breakpoint 3 asid */
> > +
> > +#define LOONGARCH_CSR_DB4ADDR 0x330 /* data breakpoint 4 address */
> > +#define LOONGARCH_CSR_DB4MASK 0x331 /* data breakpoint 4 maks */
> > +#define LOONGARCH_CSR_DB4CTL 0x332 /* data breakpoint 4 control */
> > +#define LOONGARCH_CSR_DB4ASID 0x333 /* data breakpoint 4 asid */
> > +
> > +#define LOONGARCH_CSR_DB5ADDR 0x338 /* data breakpoint 5 address */
> > +#define LOONGARCH_CSR_DB5MASK 0x339 /* data breakpoint 5 mask */
> > +#define LOONGARCH_CSR_DB5CTL 0x33a /* data breakpoint 5 control */
> > +#define LOONGARCH_CSR_DB5ASID 0x33b /* data breakpoint 5 asid */
> > +
> > +#define LOONGARCH_CSR_DB6ADDR 0x340 /* data breakpoint 6 address */
> > +#define LOONGARCH_CSR_DB6MASK 0x341 /* data breakpoint 6 mask */
> > +#define LOONGARCH_CSR_DB6CTL 0x342 /* data breakpoint 6 control */
> > +#define LOONGARCH_CSR_DB6ASID 0x343 /* data breakpoint 6 asid */
> > +
> > +#define LOONGARCH_CSR_DB7ADDR 0x348 /* data breakpoint 7 address */
> > +#define LOONGARCH_CSR_DB7MASK 0x349 /* data breakpoint 7 mask */
> > +#define LOONGARCH_CSR_DB7CTL 0x34a /* data breakpoint 7 control */
> > +#define LOONGARCH_CSR_DB7ASID 0x34b /* data breakpoint 7 asid */
> > +
> > +#define LOONGARCH_CSR_FWPC 0x380 /* instruction breakpoint config */
> > +#define LOONGARCH_CSR_FWPS 0x381 /* instruction breakpoint status */
> > +
> > +#define LOONGARCH_CSR_IB0ADDR 0x390 /* inst breakpoint 0 address */
> > +#define LOONGARCH_CSR_IB0MASK 0x391 /* inst breakpoint 0 mask */
> > +#define LOONGARCH_CSR_IB0CTL 0x392 /* inst breakpoint 0 control */
> > +#define LOONGARCH_CSR_IB0ASID 0x393 /* inst breakpoint 0 asid */
> > +
> > +#define LOONGARCH_CSR_IB1ADDR 0x398 /* inst breakpoint 1 address */
> > +#define LOONGARCH_CSR_IB1MASK 0x399 /* inst breakpoint 1 mask */
> > +#define LOONGARCH_CSR_IB1CTL 0x39a /* inst breakpoint 1 control */
> > +#define LOONGARCH_CSR_IB1ASID 0x39b /* inst breakpoint 1 asid */
> > +
> > +#define LOONGARCH_CSR_IB2ADDR 0x3a0 /* inst breakpoint 2 address */
> > +#define LOONGARCH_CSR_IB2MASK 0x3a1 /* inst breakpoint 2 mask */
> > +#define LOONGARCH_CSR_IB2CTL 0x3a2 /* inst breakpoint 2 control */
> > +#define LOONGARCH_CSR_IB2ASID 0x3a3 /* inst breakpoint 2 asid */
> > +
> > +#define LOONGARCH_CSR_IB3ADDR 0x3a8 /* inst breakpoint 3 address */
> > +#define LOONGARCH_CSR_IB3MASK 0x3a9 /* breakpoint 3 mask */
> > +#define LOONGARCH_CSR_IB3CTL 0x3aa /* inst breakpoint 3 control */
> > +#define LOONGARCH_CSR_IB3ASID 0x3ab /* inst breakpoint 3 asid */
> > +
> > +#define LOONGARCH_CSR_IB4ADDR 0x3b0 /* inst breakpoint 4 address */
> > +#define LOONGARCH_CSR_IB4MASK 0x3b1 /* inst breakpoint 4 mask */
> > +#define LOONGARCH_CSR_IB4CTL 0x3b2 /* inst breakpoint 4 control */
> > +#define LOONGARCH_CSR_IB4ASID 0x3b3 /* inst breakpoint 4 asid */
> > +
> > +#define LOONGARCH_CSR_IB5ADDR 0x3b8 /* inst breakpoint 5 address */
> > +#define LOONGARCH_CSR_IB5MASK 0x3b9 /* inst breakpoint 5 mask */
> > +#define LOONGARCH_CSR_IB5CTL 0x3ba /* inst breakpoint 5 control */
> > +#define LOONGARCH_CSR_IB5ASID 0x3bb /* inst breakpoint 5 asid */
> > +
> > +#define LOONGARCH_CSR_IB6ADDR 0x3c0 /* inst breakpoint 6 address */
> > +#define LOONGARCH_CSR_IB6MASK 0x3c1 /* inst breakpoint 6 mask */
> > +#define LOONGARCH_CSR_IB6CTL 0x3c2 /* inst breakpoint 6 control */
> > +#define LOONGARCH_CSR_IB6ASID 0x3c3 /* inst breakpoint 6 asid */
> > +
> > +#define LOONGARCH_CSR_IB7ADDR 0x3c8 /* inst breakpoint 7 address */
> > +#define LOONGARCH_CSR_IB7MASK 0x3c9 /* inst breakpoint 7 mask */
> > +#define LOONGARCH_CSR_IB7CTL 0x3ca /* inst breakpoint 7 control */
> > +#define LOONGARCH_CSR_IB7ASID 0x3cb /* inst breakpoint 7 asid */
> > +
> > +#define LOONGARCH_CSR_DEBUG 0x500 /* debug config */
> > +#define LOONGARCH_CSR_DERA 0x501 /* debug era */
> > +#define LOONGARCH_CSR_DESAVE 0x502 /* debug save */
> > +
> > +/*
> > + * CSR_ECFG IM
> > + */
> > +#define ECFG0_IM 0x00001fff
> > +#define ECFGB_SIP0 0
> > +#define ECFGF_SIP0 (_ULCAST_(1) << ECFGB_SIP0)
> > +#define ECFGB_SIP1 1
> > +#define ECFGF_SIP1 (_ULCAST_(1) << ECFGB_SIP1)
> > +#define ECFGB_IP0 2
> > +#define ECFGF_IP0 (_ULCAST_(1) << ECFGB_IP0)
> > +#define ECFGB_IP1 3
> > +#define ECFGF_IP1 (_ULCAST_(1) << ECFGB_IP1)
> > +#define ECFGB_IP2 4
> > +#define ECFGF_IP2 (_ULCAST_(1) << ECFGB_IP2)
> > +#define ECFGB_IP3 5
> > +#define ECFGF_IP3 (_ULCAST_(1) << ECFGB_IP3)
> > +#define ECFGB_IP4 6
> > +#define ECFGF_IP4 (_ULCAST_(1) << ECFGB_IP4)
> > +#define ECFGB_IP5 7
> > +#define ECFGF_IP5 (_ULCAST_(1) << ECFGB_IP5)
> > +#define ECFGB_IP6 8
> > +#define ECFGF_IP6 (_ULCAST_(1) << ECFGB_IP6)
> > +#define ECFGB_IP7 9
> > +#define ECFGF_IP7 (_ULCAST_(1) << ECFGB_IP7)
> > +#define ECFGB_PMC 10
> > +#define ECFGF_PMC (_ULCAST_(1) << ECFGB_PMC)
> > +#define ECFGB_TIMER 11
> > +#define ECFGF_TIMER (_ULCAST_(1) << ECFGB_TIMER)
> > +#define ECFGB_IPI 12
> > +#define ECFGF_IPI (_ULCAST_(1) << ECFGB_IPI)
> > +#define ECFGF(hwirq) (_ULCAST_(1) << hwirq)
> > +
> > +#define ESTATF_IP 0x00001fff
> > +
> > +#define LOONGARCH_IOCSR_FEATURES 0x8
> > +#define IOCSRF_TEMP BIT_ULL(0)
> > +#define IOCSRF_NODECNT BIT_ULL(1)
> > +#define IOCSRF_MSI BIT_ULL(2)
> > +#define IOCSRF_EXTIOI BIT_ULL(3)
> > +#define IOCSRF_CSRIPI BIT_ULL(4)
> > +#define IOCSRF_FREQCSR BIT_ULL(5)
> > +#define IOCSRF_FREQSCALE BIT_ULL(6)
> > +#define IOCSRF_DVFSV1 BIT_ULL(7)
> > +#define IOCSRF_EIODECODE BIT_ULL(9)
> > +#define IOCSRF_FLATMODE BIT_ULL(10)
> > +#define IOCSRF_VM BIT_ULL(11)
> > +
> > +#define LOONGARCH_IOCSR_VENDOR 0x10
> > +
> > +#define LOONGARCH_IOCSR_CPUNAME 0x20
> > +
> > +#define LOONGARCH_IOCSR_NODECNT 0x408
> > +
> > +#define LOONGARCH_IOCSR_MISC_FUNC 0x420
> > +#define IOCSR_MISC_FUNC_TIMER_RESET BIT_ULL(21)
> > +#define IOCSR_MISC_FUNC_EXT_IOI_EN BIT_ULL(48)
> > +
> > +#define LOONGARCH_IOCSR_CPUTEMP 0x428
> > +
> > +/* PerCore CSR, only accessible by local cores */
> > +#define LOONGARCH_IOCSR_IPI_STATUS 0x1000
> > +#define LOONGARCH_IOCSR_IPI_EN 0x1004
> > +#define LOONGARCH_IOCSR_IPI_SET 0x1008
> > +#define LOONGARCH_IOCSR_IPI_CLEAR 0x100c
> > +#define LOONGARCH_IOCSR_MBUF0 0x1020
> > +#define LOONGARCH_IOCSR_MBUF1 0x1028
> > +#define LOONGARCH_IOCSR_MBUF2 0x1030
> > +#define LOONGARCH_IOCSR_MBUF3 0x1038
> > +
> > +#define LOONGARCH_IOCSR_IPI_SEND 0x1040
> > +#define IOCSR_IPI_SEND_IP_SHIFT 0
> > +#define IOCSR_IPI_SEND_CPU_SHIFT 16
> > +#define IOCSR_IPI_SEND_BLOCKING BIT(31)
> > +
> > +#define LOONGARCH_IOCSR_MBUF_SEND 0x1048
> > +#define IOCSR_MBUF_SEND_BLOCKING BIT_ULL(31)
> > +#define IOCSR_MBUF_SEND_BOX_SHIFT 2
> > +#define IOCSR_MBUF_SEND_BOX_LO(box) (box << 1)
> > +#define IOCSR_MBUF_SEND_BOX_HI(box) ((box << 1) + 1)
> > +#define IOCSR_MBUF_SEND_CPU_SHIFT 16
> > +#define IOCSR_MBUF_SEND_BUF_SHIFT 32
> > +#define IOCSR_MBUF_SEND_H32_MASK 0xFFFFFFFF00000000ULL
> > +
> > +#define LOONGARCH_IOCSR_ANY_SEND 0x1158
> > +#define IOCSR_ANY_SEND_BLOCKING BIT_ULL(31)
> > +#define IOCSR_ANY_SEND_CPU_SHIFT 16
> > +#define IOCSR_ANY_SEND_MASK_SHIFT 27
> > +#define IOCSR_ANY_SEND_BUF_SHIFT 32
> > +#define IOCSR_ANY_SEND_H32_MASK 0xFFFFFFFF00000000ULL
> > +
> > +/* Register offset and bit definition for CSR access */
> > +#define LOONGARCH_IOCSR_TIMER_CFG 0x1060
> > +#define LOONGARCH_IOCSR_TIMER_TICK 0x1070
> > +#define IOCSR_TIMER_CFG_RESERVED (_ULCAST_(1) << 63)
> > +#define IOCSR_TIMER_CFG_PERIODIC (_ULCAST_(1) << 62)
> > +#define IOCSR_TIMER_CFG_EN (_ULCAST_(1) << 61)
> > +#define IOCSR_TIMER_MASK 0x0ffffffffffffULL
> > +#define IOCSR_TIMER_INITVAL_RST (_ULCAST_(0xffff) << 48)
> > +
> > +#define LOONGARCH_IOCSR_EXTIOI_NODEMAP_BASE 0x14a0
> > +#define LOONGARCH_IOCSR_EXTIOI_IPMAP_BASE 0x14c0
> > +#define LOONGARCH_IOCSR_EXTIOI_EN_BASE 0x1600
> > +#define LOONGARCH_IOCSR_EXTIOI_BOUNCE_BASE 0x1680
> > +#define LOONGARCH_IOCSR_EXTIOI_ISR_BASE 0x1800
> > +#define LOONGARCH_IOCSR_EXTIOI_ROUTE_BASE 0x1c00
> > +#define IOCSR_EXTIOI_VECTOR_NUM 256
> > +
> > +#ifndef __ASSEMBLY__
> > +
> > +static inline u64 drdtime(void)
> > +{
> > + int rID = 0;
> > + u64 val = 0;
> > +
> > + __asm__ __volatile__(
> > + "rdtime.d %0, %1 \n\t"
> > + : "=r"(val), "=r"(rID)
> > + :
> > + );
> > + return val;
> > +}
> > +
> > +static inline unsigned int get_csr_cpuid(void)
> > +{
> > + return csr_readl(LOONGARCH_CSR_CPUID);
> > +}
> > +
> > +static inline void csr_any_send(unsigned int addr, unsigned int data,
> > + unsigned int data_mask, unsigned int cpu)
> > +{
> > + uint64_t val = 0;
> > +
> > + val = IOCSR_ANY_SEND_BLOCKING | addr;
> > + val |= (cpu << IOCSR_ANY_SEND_CPU_SHIFT);
> > + val |= (data_mask << IOCSR_ANY_SEND_MASK_SHIFT);
> > + val |= ((uint64_t)data << IOCSR_ANY_SEND_BUF_SHIFT);
> > + iocsr_writeq(val, LOONGARCH_IOCSR_ANY_SEND);
> > +}
> > +
> > +static inline unsigned int read_csr_excode(void)
> > +{
> > + return (csr_readl(LOONGARCH_CSR_ESTAT) & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
> > +}
> > +
> > +static inline void write_csr_index(unsigned int idx)
> > +{
> > + csr_xchgl(idx, CSR_TLBIDX_IDXM, LOONGARCH_CSR_TLBIDX);
> > +}
> > +
> > +static inline unsigned int read_csr_pagesize(void)
> > +{
> > + return (csr_readl(LOONGARCH_CSR_TLBIDX) & CSR_TLBIDX_SIZEM) >> CSR_TLBIDX_SIZE;
> > +}
> > +
> > +static inline void write_csr_pagesize(unsigned int size)
> > +{
> > + csr_xchgl(size << CSR_TLBIDX_SIZE, CSR_TLBIDX_SIZEM, LOONGARCH_CSR_TLBIDX);
> > +}
> > +
> > +static inline unsigned int read_csr_tlbrefill_pagesize(void)
> > +{
> > + return (csr_readq(LOONGARCH_CSR_TLBREHI) & CSR_TLBREHI_PS) >> CSR_TLBREHI_PS_SHIFT;
> > +}
> > +
> > +static inline void write_csr_tlbrefill_pagesize(unsigned int size)
> > +{
> > + csr_xchgq(size << CSR_TLBREHI_PS_SHIFT, CSR_TLBREHI_PS, LOONGARCH_CSR_TLBREHI);
> > +}
> > +
> > +#define read_csr_asid() csr_readl(LOONGARCH_CSR_ASID)
> > +#define write_csr_asid(val) csr_writel(val, LOONGARCH_CSR_ASID)
> > +#define read_csr_entryhi() csr_readq(LOONGARCH_CSR_TLBEHI)
> > +#define write_csr_entryhi(val) csr_writeq(val, LOONGARCH_CSR_TLBEHI)
> > +#define read_csr_entrylo0() csr_readq(LOONGARCH_CSR_TLBELO0)
> > +#define write_csr_entrylo0(val) csr_writeq(val, LOONGARCH_CSR_TLBELO0)
> > +#define read_csr_entrylo1() csr_readq(LOONGARCH_CSR_TLBELO1)
> > +#define write_csr_entrylo1(val) csr_writeq(val, LOONGARCH_CSR_TLBELO1)
> > +#define read_csr_ecfg() csr_readl(LOONGARCH_CSR_ECFG)
> > +#define write_csr_ecfg(val) csr_writel(val, LOONGARCH_CSR_ECFG)
> > +#define read_csr_estat() csr_readl(LOONGARCH_CSR_ESTAT)
> > +#define write_csr_estat(val) csr_writel(val, LOONGARCH_CSR_ESTAT)
> > +#define read_csr_tlbidx() csr_readl(LOONGARCH_CSR_TLBIDX)
> > +#define write_csr_tlbidx(val) csr_writel(val, LOONGARCH_CSR_TLBIDX)
> > +#define read_csr_euen() csr_readl(LOONGARCH_CSR_EUEN)
> > +#define write_csr_euen(val) csr_writel(val, LOONGARCH_CSR_EUEN)
> > +#define read_csr_cpuid() csr_readl(LOONGARCH_CSR_CPUID)
> > +#define read_csr_prcfg1() csr_readq(LOONGARCH_CSR_PRCFG1)
> > +#define write_csr_prcfg1(val) csr_writeq(val, LOONGARCH_CSR_PRCFG1)
> > +#define read_csr_prcfg2() csr_readq(LOONGARCH_CSR_PRCFG2)
> > +#define write_csr_prcfg2(val) csr_writeq(val, LOONGARCH_CSR_PRCFG2)
> > +#define read_csr_prcfg3() csr_readq(LOONGARCH_CSR_PRCFG3)
> > +#define write_csr_prcfg3(val) csr_writeq(val, LOONGARCH_CSR_PRCFG3)
> > +#define read_csr_stlbpgsize() csr_readl(LOONGARCH_CSR_STLBPGSIZE)
> > +#define write_csr_stlbpgsize(val) csr_writel(val, LOONGARCH_CSR_STLBPGSIZE)
> > +#define read_csr_rvacfg() csr_readl(LOONGARCH_CSR_RVACFG)
> > +#define write_csr_rvacfg(val) csr_writel(val, LOONGARCH_CSR_RVACFG)
> > +#define write_csr_tintclear(val) csr_writel(val, LOONGARCH_CSR_TINTCLR)
> > +#define read_csr_impctl1() csr_readq(LOONGARCH_CSR_IMPCTL1)
> > +#define write_csr_impctl1(val) csr_writeq(val, LOONGARCH_CSR_IMPCTL1)
> > +#define write_csr_impctl2(val) csr_writeq(val, LOONGARCH_CSR_IMPCTL2)
> > +
> > +#define read_csr_perfctrl0() csr_readq(LOONGARCH_CSR_PERFCTRL0)
> > +#define read_csr_perfcntr0() csr_readq(LOONGARCH_CSR_PERFCNTR0)
> > +#define read_csr_perfctrl1() csr_readq(LOONGARCH_CSR_PERFCTRL1)
> > +#define read_csr_perfcntr1() csr_readq(LOONGARCH_CSR_PERFCNTR1)
> > +#define read_csr_perfctrl2() csr_readq(LOONGARCH_CSR_PERFCTRL2)
> > +#define read_csr_perfcntr2() csr_readq(LOONGARCH_CSR_PERFCNTR2)
> > +#define read_csr_perfctrl3() csr_readq(LOONGARCH_CSR_PERFCTRL3)
> > +#define read_csr_perfcntr3() csr_readq(LOONGARCH_CSR_PERFCNTR3)
> > +#define write_csr_perfctrl0(val) csr_writeq(val, LOONGARCH_CSR_PERFCTRL0)
> > +#define write_csr_perfcntr0(val) csr_writeq(val, LOONGARCH_CSR_PERFCNTR0)
> > +#define write_csr_perfctrl1(val) csr_writeq(val, LOONGARCH_CSR_PERFCTRL1)
> > +#define write_csr_perfcntr1(val) csr_writeq(val, LOONGARCH_CSR_PERFCNTR1)
> > +#define write_csr_perfctrl2(val) csr_writeq(val, LOONGARCH_CSR_PERFCTRL2)
> > +#define write_csr_perfcntr2(val) csr_writeq(val, LOONGARCH_CSR_PERFCNTR2)
> > +#define write_csr_perfctrl3(val) csr_writeq(val, LOONGARCH_CSR_PERFCTRL3)
> > +#define write_csr_perfcntr3(val) csr_writeq(val, LOONGARCH_CSR_PERFCNTR3)
> > +
> > +/*
> > + * Manipulate bits in a register.
> > + */
> > +#define __BUILD_CSR_COMMON(name) \
> > +static inline unsigned long \
> > +set_##name(unsigned long set) \
> > +{ \
> > + unsigned long res, new; \
> > + \
> > + res = read_##name(); \
> > + new = res | set; \
> > + write_##name(new); \
> > + \
> > + return res; \
> > +} \
> > + \
> > +static inline unsigned long \
> > +clear_##name(unsigned long clear) \
> > +{ \
> > + unsigned long res, new; \
> > + \
> > + res = read_##name(); \
> > + new = res & ~clear; \
> > + write_##name(new); \
> > + \
> > + return res; \
> > +} \
> > + \
> > +static inline unsigned long \
> > +change_##name(unsigned long change, unsigned long val) \
> > +{ \
> > + unsigned long res, new; \
> > + \
> > + res = read_##name(); \
> > + new = res & ~change; \
> > + new |= (val & change); \
> > + write_##name(new); \
> > + \
> > + return res; \
> > +}
> > +
> > +#define __BUILD_CSR_OP(name) __BUILD_CSR_COMMON(csr_##name)
> > +
> > +__BUILD_CSR_OP(euen)
> > +__BUILD_CSR_OP(ecfg)
> > +__BUILD_CSR_OP(tlbidx)
> > +
> > +#define set_csr_estat(val) \
> > + csr_xchgl(val, val, LOONGARCH_CSR_ESTAT)
> > +#define clear_csr_estat(val) \
> > + csr_xchgl(~(val), val, LOONGARCH_CSR_ESTAT)
> > +
> > +#endif /* __ASSEMBLY__ */
> > +
> > +/* Generic EntryLo bit definitions */
> > +#define ENTRYLO_V (_ULCAST_(1) << 0)
> > +#define ENTRYLO_D (_ULCAST_(1) << 1)
> > +#define ENTRYLO_PLV_SHIFT 2
> > +#define ENTRYLO_PLV (_ULCAST_(3) << ENTRYLO_PLV_SHIFT)
> > +#define ENTRYLO_C_SHIFT 4
> > +#define ENTRYLO_C (_ULCAST_(3) << ENTRYLO_C_SHIFT)
> > +#define ENTRYLO_G (_ULCAST_(1) << 6)
> > +#define ENTRYLO_NR (_ULCAST_(1) << 61)
> > +#define ENTRYLO_NX (_ULCAST_(1) << 62)
> > +
> > +/* LoongArch GlobalNumber definitions */
> > +#define LOONGARCH_GLOBALNUMBER_VP_SHF 0
> > +#define LOONGARCH_GLOBALNUMBER_VP (_ULCAST_(0xff) << LOONGARCH_GLOBALNUMBER_VP_SHF)
> > +#define LOONGARCH_GLOBALNUMBER_CORE_SHF 8
> > +#define LOONGARCH_GLOBALNUMBER_CORE (_ULCAST_(0xff) << LOONGARCH_GLOBALNUMBER_CORE_SHF)
> > +#define LOONGARCH_GLOBALNUMBER_CLUSTER_SHF 16
> > +#define LOONGARCH_GLOBALNUMBER_CLUSTER (_ULCAST_(0xf) << LOONGARCH_GLOBALNUMBER_CLUSTER_SHF)
> > +
> > +/* Values for PageSize register */
> > +#define PS_4K 0x0000000c
> > +#define PS_8K 0x0000000d
> > +#define PS_16K 0x0000000e
> > +#define PS_32K 0x0000000f
> > +#define PS_64K 0x00000010
> > +#define PS_128K 0x00000011
> > +#define PS_256K 0x00000012
> > +#define PS_512K 0x00000013
> > +#define PS_1M 0x00000014
> > +#define PS_2M 0x00000015
> > +#define PS_4M 0x00000016
> > +#define PS_8M 0x00000017
> > +#define PS_16M 0x00000018
> > +#define PS_32M 0x00000019
> > +#define PS_64M 0x0000001a
> > +#define PS_128M 0x0000001b
> > +#define PS_256M 0x0000001c
> > +#define PS_512M 0x0000001d
> > +#define PS_1G 0x0000001e
> > +
> > +#define PS_MASK 0x3f000000
> > +#define PS_SHIFT 24
> > +
> > +/* Default page size for a given kernel configuration */
> > +#ifdef CONFIG_PAGE_SIZE_4KB
> > +#define PS_DEFAULT_SIZE PS_4K
> > +#elif defined(CONFIG_PAGE_SIZE_16KB)
> > +#define PS_DEFAULT_SIZE PS_16K
> > +#elif defined(CONFIG_PAGE_SIZE_64KB)
> > +#define PS_DEFAULT_SIZE PS_64K
> > +#else
> > +#error Bad page size configuration!
> > +#endif
> > +
> > +/* Default huge tlb size for a given kernel configuration */
> > +#ifdef CONFIG_PAGE_SIZE_4KB
> > +#define PS_HUGE_SIZE PS_1M
> > +#elif defined(CONFIG_PAGE_SIZE_16KB)
> > +#define PS_HUGE_SIZE PS_16M
> > +#elif defined(CONFIG_PAGE_SIZE_64KB)
> > +#define PS_HUGE_SIZE PS_256M
> > +#else
> > +#error Bad page size configuration for hugetlbfs!
> > +#endif
> > +
> > +/* ExStatus.ExcCode */
> > +#define EXCCODE_RSV 0 /* Reserved */
> > +#define EXCCODE_TLBL 1 /* TLB miss on a load */
> > +#define EXCCODE_TLBS 2 /* TLB miss on a store */
> > +#define EXCCODE_TLBI 3 /* TLB miss on a ifetch */
> > +#define EXCCODE_TLBM 4 /* TLB modified fault */
> > +#define EXCCODE_TLBNR 5 /* TLB Read-Inhibit exception */
> > +#define EXCCODE_TLBNX 6 /* TLB Execution-Inhibit exception */
> > +#define EXCCODE_TLBPE 7 /* TLB Privilege Error */
> > +#define EXCCODE_ADE 8 /* Address Error */
> > + #define EXSUBCODE_ADEF 0 /* Fetch Instruction */
> > + #define EXSUBCODE_ADEM 1 /* Access Memory*/
> > +#define EXCCODE_ALE 9 /* Unalign Access */
> > +#define EXCCODE_OOB 10 /* Out of bounds */
> > +#define EXCCODE_SYS 11 /* System call */
> > +#define EXCCODE_BP 12 /* Breakpoint */
> > +#define EXCCODE_INE 13 /* Inst. Not Exist */
> > +#define EXCCODE_IPE 14 /* Inst. Privileged Error */
> "Privilege Error"?
> > +#define EXCCODE_FPDIS 15 /* FPU Disabled */
> > +#define EXCCODE_LSXDIS 16 /* LSX Disabled */
> > +#define EXCCODE_LASXDIS 17 /* LASX Disabled */
> > +#define EXCCODE_FPE 18 /* Floating Point Exception */
> > + #define EXCSUBCODE_FPE 0 /* Floating Point Exception */
> > + #define EXCSUBCODE_VFPE 1 /* Vector Exception */
> > +#define EXCCODE_WATCH 19 /* Watch address reference */
> > +#define EXCCODE_BTDIS 20 /* Binary Trans. Disabled */
> > +#define EXCCODE_BTE 21 /* Binary Trans. Exception */
> > +#define EXCCODE_PSI 22 /* Guest Privileged Error */
> > +#define EXCCODE_HYP 23 /* Hypercall */
> > +#define EXCCODE_GCM 24 /* Guest CSR modified */
> > + #define EXCSUBCODE_GCSC 0 /* Software caused */
> > + #define EXCSUBCODE_GCHC 1 /* Hardware caused */
> > +#define EXCCODE_SE 25 /* Security */
> > +
> > +#define EXCCODE_INT_START 64
> > +#define EXCCODE_SIP0 64
> > +#define EXCCODE_SIP1 65
> > +#define EXCCODE_IP0 66
> > +#define EXCCODE_IP1 67
> > +#define EXCCODE_IP2 68
> > +#define EXCCODE_IP3 69
> > +#define EXCCODE_IP4 70
> > +#define EXCCODE_IP5 71
> > +#define EXCCODE_IP6 72
> > +#define EXCCODE_IP7 73
> > +#define EXCCODE_PMC 74 /* Performance Counter */
> > +#define EXCCODE_TIMER 75
> > +#define EXCCODE_IPI 76
> > +#define EXCCODE_NMI 77
> > +#define EXCCODE_INT_END 78
> > +#define EXCCODE_INT_NUM (EXCCODE_INT_END - EXCCODE_INT_START)
> > +
> > +/* FPU register names */
> > +#define LOONGARCH_FCSR0 $r0
> > +#define LOONGARCH_FCSR1 $r1
> > +#define LOONGARCH_FCSR2 $r2
> > +#define LOONGARCH_FCSR3 $r3
> > +
> > +/* FPU Status Register Values */
> > +#define FPU_CSR_RSVD 0xe0e0fce0
> > +
> > +/*
> > + * X the exception cause indicator
> > + * E the exception enable
> > + * S the sticky/flag bit
> > + */
> > +#define FPU_CSR_ALL_X 0x1f000000
> > +#define FPU_CSR_INV_X 0x10000000
> > +#define FPU_CSR_DIV_X 0x08000000
> > +#define FPU_CSR_OVF_X 0x04000000
> > +#define FPU_CSR_UDF_X 0x02000000
> > +#define FPU_CSR_INE_X 0x01000000
> > +
> > +#define FPU_CSR_ALL_S 0x001f0000
> > +#define FPU_CSR_INV_S 0x00100000
> > +#define FPU_CSR_DIV_S 0x00080000
> > +#define FPU_CSR_OVF_S 0x00040000
> > +#define FPU_CSR_UDF_S 0x00020000
> > +#define FPU_CSR_INE_S 0x00010000
> > +
> > +#define FPU_CSR_ALL_E 0x0000001f
> > +#define FPU_CSR_INV_E 0x00000010
> > +#define FPU_CSR_DIV_E 0x00000008
> > +#define FPU_CSR_OVF_E 0x00000004
> > +#define FPU_CSR_UDF_E 0x00000002
> > +#define FPU_CSR_INE_E 0x00000001
> > +
> > +/* Bits 8 and 9 of FPU Status Register specify the rounding mode */
> > +#define FPU_CSR_RM 0x300
> > +#define FPU_CSR_RN 0x000 /* nearest */
> > +#define FPU_CSR_RZ 0x100 /* towards zero */
> > +#define FPU_CSR_RU 0x200 /* towards +Infinity */
> > +#define FPU_CSR_RD 0x300 /* towards -Infinity */
> > +
> > +#define read_fcsr(source) \
> > +({ \
> > + unsigned int __res; \
> > +\
> > + __asm__ __volatile__( \
> > + " movfcsr2gr %0, "STR(source)" \n" \
> > + : "=r" (__res)); \
> > + __res; \
> > +})
> > +
> > +#define write_fcsr(dest, val) \
> > +do { \
> > + __asm__ __volatile__( \
> > + " movgr2fcsr %0, "STR(dest)" \n" \
> > + : : "r" (val)); \
> > +} while (0)
> > +
> > +#endif /* _ASM_LOONGARCH_H */
> > diff --git a/arch/loongarch/include/asm/loongson.h b/arch/loongarch/include/asm/loongson.h
> > new file mode 100644
> > index 000000000000..4cefd393fd5c
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/loongson.h
> > @@ -0,0 +1,159 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Author: Huacai Chen <chenhuacai@...ngson.cn>
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> Better explain this file's name and purpose... This is mostly
> definitions for models produced by Loongson Corporation, much like how
> MTI stands for MIPS the corporation while MIPS stands for the
> architecture. Don't overload the "Loongson" term, it's too ambiguous
> already...
> > + */
> > +
> > +#ifndef __ASM_LOONGSON_H
> > +#define __ASM_LOONGSON_H
> > +
> > +#include <linux/init.h>
> > +#include <linux/io.h>
> > +#include <linux/irq.h>
> > +#include <linux/pci.h>
> > +#include <asm/addrspace.h>
> > +#include <asm/boot_param.h>
> > +
> > +extern const struct plat_smp_ops loongson3_smp_ops;
> > +
> > +/* loongson-specific command line, env and memory initialization */
> > +extern void __init fw_init_environ(void);
> > +extern void __init fw_init_memory(void);
> > +extern void __init fw_init_numa_memory(void);
> > +
> > +#define LOONGSON_REG(x) \
> > + (*(volatile u32 *)((char *)TO_UNCAC(LOONGSON_REG_BASE) + (x)))
> > +
> > +#define LOONGSON_LIO_BASE 0x18000000
> > +#define LOONGSON_LIO_SIZE 0x00100000 /* 1M */
> > +#define LOONGSON_LIO_TOP (LOONGSON_LIO_BASE+LOONGSON_LIO_SIZE-1)
> > +
> > +#define LOONGSON_BOOT_BASE 0x1c000000
> > +#define LOONGSON_BOOT_SIZE 0x02000000 /* 32M */
> > +#define LOONGSON_BOOT_TOP (LOONGSON_BOOT_BASE+LOONGSON_BOOT_SIZE-1)
> > +
> > +#define LOONGSON_REG_BASE 0x1fe00000
> > +#define LOONGSON_REG_SIZE 0x00100000 /* 1M */
> > +#define LOONGSON_REG_TOP (LOONGSON_REG_BASE+LOONGSON_REG_SIZE-1)
> > +
> > +/* GPIO Regs - r/w */
> > +
> > +#define LOONGSON_GPIODATA LOONGSON_REG(0x11c)
> > +#define LOONGSON_GPIOIE LOONGSON_REG(0x120)
> > +#define LOONGSON_REG_GPIO_BASE (LOONGSON_REG_BASE + 0x11c)
> > +
> > +#define MAX_PACKAGES 16
> > +
> > +/* Chip Config registor of each physical cpu package */
> > +extern u64 loongson_chipcfg[MAX_PACKAGES];
> > +#define LOONGSON_CHIPCFG(id) (*(volatile u32 *)(loongson_chipcfg[id]))
> > +
> > +/* Chip Temperature registor of each physical cpu package */
> > +extern u64 loongson_chiptemp[MAX_PACKAGES];
> > +#define LOONGSON_CHIPTEMP(id) (*(volatile u32 *)(loongson_chiptemp[id]))
> > +
> > +/* Freq Control register of each physical cpu package */
> > +extern u64 loongson_freqctrl[MAX_PACKAGES];
> > +#define LOONGSON_FREQCTRL(id) (*(volatile u32 *)(loongson_freqctrl[id]))
> > +
> > +#define xconf_readl(addr) readl(addr)
> > +#define xconf_readq(addr) readq(addr)
> > +
> > +static inline void xconf_writel(u32 val, volatile void __iomem *addr)
> > +{
> > + asm volatile (
> > + " st.w %[v], %[hw], 0 \n"
> > + " ld.b $r0, %[hw], 0 \n"
> > + :
> > + : [hw] "r" (addr), [v] "r" (val)
> > + );
> > +}
> > +
> > +static inline void xconf_writeq(u64 val64, volatile void __iomem *addr)
> > +{
> > + asm volatile (
> > + " st.d %[v], %[hw], 0 \n"
> > + " ld.b $r0, %[hw], 0 \n"
> > + :
> > + : [hw] "r" (addr), [v] "r" (val64)
> > + );
> > +}
> > +
> > +/* ============== LS7A registers =============== */
> > +#define LS7A_PCH_REG_BASE 0x10000000UL
> > +/* LPC regs */
> > +#define LS7A_LPC_REG_BASE (LS7A_PCH_REG_BASE + 0x00002000)
> > +/* CHIPCFG regs */
> > +#define LS7A_CHIPCFG_REG_BASE (LS7A_PCH_REG_BASE + 0x00010000)
> > +/* MISC reg base */
> > +#define LS7A_MISC_REG_BASE (LS7A_PCH_REG_BASE + 0x00080000)
> > +/* ACPI regs */
> > +#define LS7A_ACPI_REG_BASE (LS7A_MISC_REG_BASE + 0x00050000)
> > +/* RTC regs */
> > +#define LS7A_RTC_REG_BASE (LS7A_MISC_REG_BASE + 0x00050100)
> > +
> > +#define LS7A_DMA_CFG (volatile void *)TO_UNCAC(LS7A_CHIPCFG_REG_BASE + 0x041c)
> > +#define LS7A_DMA_NODE_SHF 8
> > +#define LS7A_DMA_NODE_MASK 0x1F00
> > +
> > +#define LS7A_INT_MASK_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x020)
> > +#define LS7A_INT_EDGE_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x060)
> > +#define LS7A_INT_CLEAR_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x080)
> > +#define LS7A_INT_HTMSI_EN_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x040)
> > +#define LS7A_INT_ROUTE_ENTRY_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x100)
> > +#define LS7A_INT_HTMSI_VEC_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x200)
> > +#define LS7A_INT_STATUS_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x3a0)
> > +#define LS7A_INT_POL_REG (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x3e0)
> > +#define LS7A_LPC_INT_CTL (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x2000)
> > +#define LS7A_LPC_INT_ENA (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x2004)
> > +#define LS7A_LPC_INT_STS (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x2008)
> > +#define LS7A_LPC_INT_CLR (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x200c)
> > +#define LS7A_LPC_INT_POL (volatile void *)TO_UNCAC(LS7A_PCH_REG_BASE + 0x2010)
> > +
> > +#define LS7A_PMCON_SOC_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x000)
> > +#define LS7A_PMCON_RESUME_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x004)
> > +#define LS7A_PMCON_RTC_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x008)
> > +#define LS7A_PM1_EVT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x00c)
> > +#define LS7A_PM1_ENA_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x010)
> > +#define LS7A_PM1_CNT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x014)
> > +#define LS7A_PM1_TMR_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x018)
> > +#define LS7A_P_CNT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x01c)
> > +#define LS7A_GPE0_STS_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x028)
> > +#define LS7A_GPE0_ENA_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x02c)
> > +#define LS7A_RST_CNT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x030)
> > +#define LS7A_WD_SET_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x034)
> > +#define LS7A_WD_TIMER_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x038)
> > +#define LS7A_THSENS_CNT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x04c)
> > +#define LS7A_GEN_RTC_1_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x050)
> > +#define LS7A_GEN_RTC_2_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x054)
> > +#define LS7A_DPM_CFG_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x400)
> > +#define LS7A_DPM_STS_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x404)
> > +#define LS7A_DPM_CNT_REG (volatile void *)TO_UNCAC(LS7A_ACPI_REG_BASE + 0x408)
> > +
> > +typedef enum {
> > + ACPI_PCI_HOTPLUG_STATUS = 1 << 1,
> > + ACPI_CPU_HOTPLUG_STATUS = 1 << 2,
> > + ACPI_MEM_HOTPLUG_STATUS = 1 << 3,
> > + ACPI_POWERBUTTON_STATUS = 1 << 8,
> > + ACPI_RTC_WAKE_STATUS = 1 << 10,
> > + ACPI_PCI_WAKE_STATUS = 1 << 14,
> > + ACPI_ANY_WAKE_STATUS = 1 << 15,
> > +} AcpiEventStatusBits;
> > +
> > +#define HT1LO_OFFSET 0xe0000000000UL
> > +
> > +/* PCI Configuration Space Base */
> > +#define MCFG_EXT_PCICFG_BASE 0xefe00000000UL
> > +
> > +/* REG ACCESS*/
> Do we really need this tiny comment? The code is pretty self-explanatory
> and the comment end marker is lacking a space before.
> > +#define ls7a_readb(addr) (*(volatile unsigned char *)TO_UNCAC(addr))
> > +#define ls7a_readw(addr) (*(volatile unsigned short *)TO_UNCAC(addr))
> > +#define ls7a_readl(addr) (*(volatile unsigned int *)TO_UNCAC(addr))
> > +#define ls7a_readq(addr) (*(volatile unsigned long *)TO_UNCAC(addr))
> > +#define ls7a_writeb(val, addr) *(volatile unsigned char *)TO_UNCAC(addr) = (val)
> > +#define ls7a_writew(val, addr) *(volatile unsigned short *)TO_UNCAC(addr) = (val)
> > +#define ls7a_writel(val, addr) ls7a_write_type(val, addr, uint32_t)
> > +#define ls7a_writeq(val, addr) ls7a_write_type(val, addr, uint64_t)
> > +#define ls7a_write(val, addr) ls7a_write_type(val, addr, uint64_t)
> > +
> > +#endif /* __ASM_LOONGSON_H */
> > diff --git a/arch/loongarch/include/asm/regdef.h b/arch/loongarch/include/asm/regdef.h
> > new file mode 100644
> > index 000000000000..9f24f0c05fe3
> > --- /dev/null
> > +++ b/arch/loongarch/include/asm/regdef.h
> > @@ -0,0 +1,43 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef _ASM_REGDEF_H
> > +#define _ASM_REGDEF_H
> > +
> > +#define zero $r0 /* wired zero */
> > +#define ra $r1 /* return address */
> > +#define tp $r2
> > +#define sp $r3 /* stack pointer */
> > +#define v0 $r4 /* return value - caller saved */
> > +#define v1 $r5
> > +#define a0 $r4 /* argument registers */
> > +#define a1 $r5
> > +#define a2 $r6
> > +#define a3 $r7
> > +#define a4 $r8
> > +#define a5 $r9
> > +#define a6 $r10
> > +#define a7 $r11
> > +#define t0 $r12 /* caller saved */
> > +#define t1 $r13
> > +#define t2 $r14
> > +#define t3 $r15
> > +#define t4 $r16
> > +#define t5 $r17
> > +#define t6 $r18
> > +#define t7 $r19
> > +#define t8 $r20
> > +#define u0 $r21
> > +#define fp $r22 /* frame pointer */
> > +#define s0 $r23 /* callee saved */
> > +#define s1 $r24
> > +#define s2 $r25
> > +#define s3 $r26
> > +#define s4 $r27
> > +#define s5 $r28
> > +#define s6 $r29
> > +#define s7 $r30
> > +#define s8 $r31
> > +
> > +#endif /* _ASM_REGDEF_H */
> Why can't this file be combined with the FP one (absorbing the FP
> definitions into this file)? While at it, remove $vX and document $u0 too.
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