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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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991da17ec0
arm is placing some code in the .text.init section, but it does not reference that section in its linker scripts. This change moves this code from the .text.init section to the .init.text section, which is presumably where it belongs. Signed-off-by: Tim Abbott <tabbott@mit.edu> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
99 lines
2.7 KiB
ArmAsm
99 lines
2.7 KiB
ArmAsm
/*
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* linux/arch/arm/mm/tlb-v6.S
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*
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* Copyright (C) 1997-2002 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* ARM architecture version 6 TLB handling functions.
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* These assume a split I/D TLB.
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*/
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#include <asm/page.h>
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#include <asm/tlbflush.h>
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#include "proc-macros.S"
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#define HARVARD_TLB
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/*
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* v6wbi_flush_user_tlb_range(start, end, vma)
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*
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* Invalidate a range of TLB entries in the specified address space.
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*
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* - start - start address (may not be aligned)
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* - end - end address (exclusive, may not be aligned)
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* - vma - vma_struct describing address range
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*
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* It is assumed that:
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* - the "Invalidate single entry" instruction will invalidate
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* both the I and the D TLBs on Harvard-style TLBs
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*/
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ENTRY(v6wbi_flush_user_tlb_range)
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vma_vm_mm r3, r2 @ get vma->vm_mm
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mov ip, #0
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mmid r3, r3 @ get vm_mm->context.id
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mcr p15, 0, ip, c7, c10, 4 @ drain write buffer
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mov r0, r0, lsr #PAGE_SHIFT @ align address
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mov r1, r1, lsr #PAGE_SHIFT
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asid r3, r3 @ mask ASID
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orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
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mov r1, r1, lsl #PAGE_SHIFT
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vma_vm_flags r2, r2 @ get vma->vm_flags
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1:
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#ifdef HARVARD_TLB
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mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1)
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tst r2, #VM_EXEC @ Executable area ?
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mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1)
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#else
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mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA (was 1)
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#endif
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add r0, r0, #PAGE_SZ
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cmp r0, r1
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blo 1b
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mcr p15, 0, ip, c7, c5, 6 @ flush BTAC/BTB
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mcr p15, 0, ip, c7, c10, 4 @ data synchronization barrier
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mov pc, lr
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/*
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* v6wbi_flush_kern_tlb_range(start,end)
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*
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* Invalidate a range of kernel TLB entries
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*
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* - start - start address (may not be aligned)
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* - end - end address (exclusive, may not be aligned)
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*/
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ENTRY(v6wbi_flush_kern_tlb_range)
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mov r2, #0
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mcr p15, 0, r2, c7, c10, 4 @ drain write buffer
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mov r0, r0, lsr #PAGE_SHIFT @ align address
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mov r1, r1, lsr #PAGE_SHIFT
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mov r0, r0, lsl #PAGE_SHIFT
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mov r1, r1, lsl #PAGE_SHIFT
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1:
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#ifdef HARVARD_TLB
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mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA
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mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA
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#else
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mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA
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#endif
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add r0, r0, #PAGE_SZ
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cmp r0, r1
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blo 1b
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mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB
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mcr p15, 0, r2, c7, c10, 4 @ data synchronization barrier
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mcr p15, 0, r2, c7, c5, 4 @ prefetch flush
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mov pc, lr
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__INIT
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.type v6wbi_tlb_fns, #object
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ENTRY(v6wbi_tlb_fns)
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.long v6wbi_flush_user_tlb_range
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.long v6wbi_flush_kern_tlb_range
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.long v6wbi_tlb_flags
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.size v6wbi_tlb_fns, . - v6wbi_tlb_fns
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