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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mm/tlb-v6.S | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/mm/tlb-v6.S')
-rw-r--r-- | arch/arm/mm/tlb-v6.S | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/mm/tlb-v6.S b/arch/arm/mm/tlb-v6.S new file mode 100644 index 000000000000..99ed26e78adf --- /dev/null +++ b/arch/arm/mm/tlb-v6.S @@ -0,0 +1,92 @@ +/* + * linux/arch/arm/mm/tlb-v6.S + * + * Copyright (C) 1997-2002 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * ARM architecture version 6 TLB handling functions. + * These assume a split I/D TLB. + */ +#include <linux/linkage.h> +#include <asm/constants.h> +#include <asm/page.h> +#include <asm/tlbflush.h> +#include "proc-macros.S" + +#define HARVARD_TLB + +/* + * v6wbi_flush_user_tlb_range(start, end, vma) + * + * Invalidate a range of TLB entries in the specified address space. + * + * - start - start address (may not be aligned) + * - end - end address (exclusive, may not be aligned) + * - vma - vma_struct describing address range + * + * It is assumed that: + * - the "Invalidate single entry" instruction will invalidate + * both the I and the D TLBs on Harvard-style TLBs + */ +ENTRY(v6wbi_flush_user_tlb_range) + vma_vm_mm r3, r2 @ get vma->vm_mm + mov ip, #0 + mmid r3, r3 @ get vm_mm->context.id + mcr p15, 0, ip, c7, c10, 4 @ drain write buffer + mov r0, r0, lsr #PAGE_SHIFT @ align address + mov r1, r1, lsr #PAGE_SHIFT + asid r3, r3 @ mask ASID + orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA + mov r1, r1, lsl #PAGE_SHIFT + vma_vm_flags r2, r2 @ get vma->vm_flags +1: +#ifdef HARVARD_TLB + mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1) + tst r2, #VM_EXEC @ Executable area ? + mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1) +#else + mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA (was 1) +#endif + add r0, r0, #PAGE_SZ + cmp r0, r1 + blo 1b + mov pc, lr + +/* + * v6wbi_flush_kern_tlb_range(start,end) + * + * Invalidate a range of kernel TLB entries + * + * - start - start address (may not be aligned) + * - end - end address (exclusive, may not be aligned) + */ +ENTRY(v6wbi_flush_kern_tlb_range) + mov r2, #0 + mcr p15, 0, r2, c7, c10, 4 @ drain write buffer + mov r0, r0, lsr #PAGE_SHIFT @ align address + mov r1, r1, lsr #PAGE_SHIFT + mov r0, r0, lsl #PAGE_SHIFT + mov r1, r1, lsl #PAGE_SHIFT +1: +#ifdef HARVARD_TLB + mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA + mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA +#else + mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA +#endif + add r0, r0, #PAGE_SZ + cmp r0, r1 + blo 1b + mov pc, lr + + .section ".text.init", #alloc, #execinstr + + .type v6wbi_tlb_fns, #object +ENTRY(v6wbi_tlb_fns) + .long v6wbi_flush_user_tlb_range + .long v6wbi_flush_kern_tlb_range + .long v6wbi_tlb_flags + .size v6wbi_tlb_fns, . - v6wbi_tlb_fns |