| /* |
| * 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 ARM925 ARM926 XScale |
| */ |
| #include <linux/linkage.h> |
| #include <linux/init.h> |
| #include <asm/asm-offsets.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 |