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Message-Id: <20210812233753.104217-14-vgupta@kernel.org>
Date: Thu, 12 Aug 2021 16:37:47 -0700
From: Vineet Gupta <vgupta@...nel.org>
To: linux-snps-arc@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
Anshuman Khandual <anshuman.khandual@....com>,
Mike Rapoport <rppt@...nel.org>,
Vineet Gupta <vgupta@...nel.org>
Subject: [PATCH v2 13/19] ARC: mm: disintegrate mmu.h (arcv2 bits out)
non functional change
Signed-off-by: Vineet Gupta <vgupta@...nel.org>
---
arch/arc/include/asm/mmu-arcv2.h | 103 +++++++++++++++++++++++++++++++
arch/arc/include/asm/mmu.h | 80 +-----------------------
arch/arc/include/asm/pgtable.h | 6 --
3 files changed, 105 insertions(+), 84 deletions(-)
create mode 100644 arch/arc/include/asm/mmu-arcv2.h
diff --git a/arch/arc/include/asm/mmu-arcv2.h b/arch/arc/include/asm/mmu-arcv2.h
new file mode 100644
index 000000000000..4c47dd3864d1
--- /dev/null
+++ b/arch/arc/include/asm/mmu-arcv2.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012, 2019-20 Synopsys, Inc. (www.synopsys.com)
+ *
+ * MMUv3 (arc700) / MMUv4 (archs) are software page walked and software managed.
+ * This file contains the TLB access registers and commands
+ */
+
+#ifndef _ASM_ARC_MMU_ARCV2_H
+#define _ASM_ARC_MMU_ARCV2_H
+
+/*
+ * TLB Management regs
+ */
+#define ARC_REG_MMU_BCR 0x06f
+
+#ifdef CONFIG_ARC_MMU_V3
+#define ARC_REG_TLBPD0 0x405
+#define ARC_REG_TLBPD1 0x406
+#define ARC_REG_TLBPD1HI 0 /* Dummy: allows common code */
+#define ARC_REG_TLBINDEX 0x407
+#define ARC_REG_TLBCOMMAND 0x408
+#define ARC_REG_PID 0x409
+#define ARC_REG_SCRATCH_DATA0 0x418
+#else
+#define ARC_REG_TLBPD0 0x460
+#define ARC_REG_TLBPD1 0x461
+#define ARC_REG_TLBPD1HI 0x463
+#define ARC_REG_TLBINDEX 0x464
+#define ARC_REG_TLBCOMMAND 0x465
+#define ARC_REG_PID 0x468
+#define ARC_REG_SCRATCH_DATA0 0x46c
+#endif
+
+/* Bits in MMU PID reg */
+#define __TLB_ENABLE (1 << 31)
+#define __PROG_ENABLE (1 << 30)
+#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
+
+/* Bits in TLB Index reg */
+#define TLB_LKUP_ERR 0x80000000
+
+#ifdef CONFIG_ARC_MMU_V3
+#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
+#else
+#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
+#endif
+
+/*
+ * TLB Commands
+ */
+#define TLBWrite 0x1
+#define TLBRead 0x2
+#define TLBGetIndex 0x3
+#define TLBProbe 0x4
+#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
+#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
+
+#ifdef CONFIG_ARC_MMU_V4
+#define TLBInsertEntry 0x7
+#define TLBDeleteEntry 0x8
+#endif
+
+/* Masks for actual TLB "PD"s */
+#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
+#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
+
+#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK_PHYS | _PAGE_CACHEABLE)
+
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+extern int pae40_exist_but_not_enab(void);
+
+static inline int is_pae40_enabled(void)
+{
+ return IS_ENABLED(CONFIG_ARC_HAS_PAE40);
+}
+
+static void inline mmu_setup_asid(struct mm_struct *mm, unsigned long asid)
+{
+ write_aux_reg(ARC_REG_PID, asid | MMU_ENABLE);
+}
+
+static void inline mmu_setup_pgd(struct mm_struct *mm, void *pgd)
+{
+ /* PGD cached in MMU reg to avoid 3 mem lookups: task->mm->pgd */
+#ifdef CONFIG_ISA_ARCV2
+ write_aux_reg(ARC_REG_SCRATCH_DATA0, (unsigned int)pgd);
+#endif
+}
+
+#else
+
+.macro ARC_MMU_REENABLE reg
+ lr \reg, [ARC_REG_PID]
+ or \reg, \reg, MMU_ENABLE
+ sr \reg, [ARC_REG_PID]
+.endm
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h
index 414a27e806b6..ca427c30f70e 100644
--- a/arch/arc/include/asm/mmu.h
+++ b/arch/arc/include/asm/mmu.h
@@ -7,91 +7,15 @@
#define _ASM_ARC_MMU_H
#ifndef __ASSEMBLY__
-#include <linux/threads.h> /* NR_CPUS */
-#endif
-
-/* MMU Management regs */
-#define ARC_REG_MMU_BCR 0x06f
-
-#ifdef CONFIG_ARC_MMU_V3
-#define ARC_REG_TLBPD0 0x405
-#define ARC_REG_TLBPD1 0x406
-#define ARC_REG_TLBPD1HI 0 /* Dummy: allows code sharing with ARC700 */
-#define ARC_REG_TLBINDEX 0x407
-#define ARC_REG_TLBCOMMAND 0x408
-#define ARC_REG_PID 0x409
-#define ARC_REG_SCRATCH_DATA0 0x418
-#else
-#define ARC_REG_TLBPD0 0x460
-#define ARC_REG_TLBPD1 0x461
-#define ARC_REG_TLBPD1HI 0x463
-#define ARC_REG_TLBINDEX 0x464
-#define ARC_REG_TLBCOMMAND 0x465
-#define ARC_REG_PID 0x468
-#define ARC_REG_SCRATCH_DATA0 0x46c
-#endif
-
-/* Bits in MMU PID register */
-#define __TLB_ENABLE (1 << 31)
-#define __PROG_ENABLE (1 << 30)
-#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
-
-/* Error code if probe fails */
-#define TLB_LKUP_ERR 0x80000000
-
-#ifdef CONFIG_ARC_MMU_V3
-#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
-#else
-#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
-#endif
-
-/* TLB Commands */
-#define TLBWrite 0x1
-#define TLBRead 0x2
-#define TLBGetIndex 0x3
-#define TLBProbe 0x4
-#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
-#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
-#ifdef CONFIG_ARC_MMU_V4
-#define TLBInsertEntry 0x7
-#define TLBDeleteEntry 0x8
-#endif
-
-#ifndef __ASSEMBLY__
+#include <linux/threads.h> /* NR_CPUS */
typedef struct {
unsigned long asid[NR_CPUS]; /* 8 bit MMU PID + Generation cycle */
} mm_context_t;
-static void inline mmu_setup_asid(struct mm_struct *mm, unsigned int asid)
-{
- write_aux_reg(ARC_REG_PID, asid | MMU_ENABLE);
-}
-
-static void inline mmu_setup_pgd(struct mm_struct *mm, void *pgd)
-{
- /* PGD cached in MMU reg to avoid 3 mem lookups: task->mm->pgd */
-#ifdef CONFIG_ISA_ARCV2
- write_aux_reg(ARC_REG_SCRATCH_DATA0, (unsigned int)pgd);
#endif
-}
-
-static inline int is_pae40_enabled(void)
-{
- return IS_ENABLED(CONFIG_ARC_HAS_PAE40);
-}
-
-extern int pae40_exist_but_not_enab(void);
-
-#else
-
-.macro ARC_MMU_REENABLE reg
- lr \reg, [ARC_REG_PID]
- or \reg, \reg, MMU_ENABLE
- sr \reg, [ARC_REG_PID]
-.endm
-#endif /* !__ASSEMBLY__ */
+#include <asm/mmu-arcv2.h>
#endif
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index f762bacb2358..de4576e8d17a 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -103,12 +103,6 @@
*/
#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_CACHEABLE)
-/* Masks for actual TLB "PD"s */
-#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
-#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
-
-#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK_PHYS | _PAGE_CACHEABLE)
-
/**************************************************************************
* Mapping of vm_flags (Generic VM) to PTE flags (arch specific)
*
--
2.25.1
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