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/* * linux/arch/arm/mm/tlbv4wbi.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 4 and version 5 TLB handling functions. * These assume a split I/D TLBs, with a write buffer. * * Processors: ARM920 ARM922 ARM926 XScale */ #include <linux/linkage.h> #include <linux/init.h> #include <asm/constants.h> #include <asm/tlbflush.h> #include "proc-macros.S" /* * v4wb_flush_user_tlb_range(start, end, mm) * * Invalidate a range of TLB entries in the specified address space. * * - start - range start address * - end - range end address * - mm - mm_struct describing address space */ .align 5 ENTRY(v4wbi_flush_user_tlb_range) vma_vm_mm ip, r2 act_mm r3 @ get current->active_mm eors r3, ip, r3 @ == mm ? movne pc, lr @ no, we dont do anything mov r3, #0 mcr p15, 0, r3, c7, c10, 4 @ drain WB vma_vm_flags r2, r2 bic r0, r0, #0x0ff bic r0, r0, #0xf00 1: tst r2, #VM_EXEC mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry add r0, r0, #PAGE_SZ cmp r0, r1 blo 1b mov pc, lr ENTRY(v4wbi_flush_kern_tlb_range) mov r3, #0 mcr p15, 0, r3, c7, c10, 4 @ drain WB bic r0, r0, #0x0ff bic r0, r0, #0xf00 1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry add r0, r0, #PAGE_SZ cmp r0, r1 blo 1b mov pc, lr __INITDATA .type v4wbi_tlb_fns, #object ENTRY(v4wbi_tlb_fns) .long v4wbi_flush_user_tlb_range .long v4wbi_flush_kern_tlb_range .long v4wbi_tlb_flags .size v4wbi_tlb_fns, . - v4wbi_tlb_fns |