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Message-ID: <bfc3a1b2-af80-c619-09fc-9d0972b87bf4@xen0n.name>
Date: Wed, 18 May 2022 23:45:37 +0800
From: WANG Xuerui <kernel@...0n.name>
To: 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>
Cc: linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
Yanteng Si <siyanteng@...ngson.cn>,
Huacai Chen <chenhuacai@...il.com>,
Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH V11 06/22] LoongArch: Add CPU definition headers
On 5/18/22 17:26, Huacai Chen wrote:
> Add 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 | 112 ++
> arch/loongarch/include/asm/cpu-features.h | 73 +
> arch/loongarch/include/asm/cpu-info.h | 116 ++
> arch/loongarch/include/asm/cpu.h | 127 ++
> arch/loongarch/include/asm/fpregdef.h | 53 +
> arch/loongarch/include/asm/loongarch.h | 1519 +++++++++++++++++++++
> arch/loongarch/include/asm/loongson.h | 153 +++
> arch/loongarch/include/asm/regdef.h | 41 +
> 8 files changed, 2194 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
>
> [snip]
>
> diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
> new file mode 100644
> index 000000000000..2be0efe93875
> --- /dev/null
> +++ b/arch/loongarch/include/asm/loongarch.h
> @@ -0,0 +1,1519 @@
>
> [snip]
>
> +
> +/* FPU register names */
> +#define LOONGARCH_FCSR0 $r0
> +#define LOONGARCH_FCSR1 $r1
> +#define LOONGARCH_FCSR2 $r2
> +#define LOONGARCH_FCSR3 $r3
Why not reuse the definitions in <asm/fpregdef.h>?
> +
> +/* 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, "__stringify(source)" \n" \
> + : "=r" (__res)); \
> + __res; \
> +})
> +
> +#define write_fcsr(dest, val) \
> +do { \
> + __asm__ __volatile__( \
> + " movgr2fcsr %0, "__stringify(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..db4992ae6a6c
> --- /dev/null
> +++ b/arch/loongarch/include/asm/loongson.h
> @@ -0,0 +1,153 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Author: Huacai Chen <chenhuacai@...ngson.cn>
> + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> + */
> +
> +#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/bootinfo.h>
> +
> +extern const struct plat_smp_ops loongson3_smp_ops;
> +
> +#define LOONGSON_REG(x) \
> + (*(volatile u32 *)((char *)TO_UNCACHE(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 */
"register" -- same below
> +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_UNCACHE(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_UNCACHE(LS7A_PCH_REG_BASE + 0x020)
> +#define LS7A_INT_EDGE_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x060)
> +#define LS7A_INT_CLEAR_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x080)
> +#define LS7A_INT_HTMSI_EN_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x040)
> +#define LS7A_INT_ROUTE_ENTRY_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x100)
> +#define LS7A_INT_HTMSI_VEC_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x200)
> +#define LS7A_INT_STATUS_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x3a0)
> +#define LS7A_INT_POL_REG (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x3e0)
> +#define LS7A_LPC_INT_CTL (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x2000)
> +#define LS7A_LPC_INT_ENA (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x2004)
> +#define LS7A_LPC_INT_STS (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x2008)
> +#define LS7A_LPC_INT_CLR (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x200c)
> +#define LS7A_LPC_INT_POL (volatile void *)TO_UNCACHE(LS7A_PCH_REG_BASE + 0x2010)
> +
> +#define LS7A_PMCON_SOC_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x000)
> +#define LS7A_PMCON_RESUME_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x004)
> +#define LS7A_PMCON_RTC_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x008)
> +#define LS7A_PM1_EVT_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x00c)
> +#define LS7A_PM1_ENA_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x010)
> +#define LS7A_PM1_CNT_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x014)
> +#define LS7A_PM1_TMR_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x018)
> +#define LS7A_P_CNT_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x01c)
> +#define LS7A_GPE0_STS_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x028)
> +#define LS7A_GPE0_ENA_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x02c)
> +#define LS7A_RST_CNT_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x030)
> +#define LS7A_WD_SET_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x034)
> +#define LS7A_WD_TIMER_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x038)
> +#define LS7A_THSENS_CNT_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x04c)
> +#define LS7A_GEN_RTC_1_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x050)
> +#define LS7A_GEN_RTC_2_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x054)
> +#define LS7A_DPM_CFG_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x400)
> +#define LS7A_DPM_STS_REG (volatile void *)TO_UNCACHE(LS7A_ACPI_REG_BASE + 0x404)
> +#define LS7A_DPM_CNT_REG (volatile void *)TO_UNCACHE(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*/
> +#define ls7a_readb(addr) (*(volatile unsigned char *)TO_UNCACHE(addr))
> +#define ls7a_readw(addr) (*(volatile unsigned short *)TO_UNCACHE(addr))
> +#define ls7a_readl(addr) (*(volatile unsigned int *)TO_UNCACHE(addr))
> +#define ls7a_readq(addr) (*(volatile unsigned long *)TO_UNCACHE(addr))
> +#define ls7a_writeb(val, addr) *(volatile unsigned char *)TO_UNCACHE(addr) = (val)
> +#define ls7a_writew(val, addr) *(volatile unsigned short *)TO_UNCACHE(addr) = (val)
> +#define ls7a_writel(val, addr) *(volatile unsigned int *)TO_UNCACHE(addr) = (val)
> +#define ls7a_writeq(val, addr) *(volatile unsigned long *)TO_UNCACHE(addr) = (val)
> +
> +#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..49a374c2612c
> --- /dev/null
> +++ b/arch/loongarch/include/asm/regdef.h
> @@ -0,0 +1,41 @@
> +/* 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 a0 $r4 /* argument registers, a0/a1 reused as v0/v1 for return value */
> +#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 */
Apart from the minor nits:
Reviewed-by: WANG Xuerui <git@...0n.name>
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