diff options
Diffstat (limited to 'arch/frv/mm/tlb-flush.S')
| -rw-r--r-- | arch/frv/mm/tlb-flush.S | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/arch/frv/mm/tlb-flush.S b/arch/frv/mm/tlb-flush.S deleted file mode 100644 index 79b3c70..0000000 --- a/arch/frv/mm/tlb-flush.S +++ /dev/null @@ -1,184 +0,0 @@ -/* tlb-flush.S: TLB flushing routines - * - * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/sys.h> -#include <linux/linkage.h> -#include <asm/page.h> -#include <asm/ptrace.h> -#include <asm/spr-regs.h> - -.macro DEBUG ch -# sethi.p %hi(0xfeff9c00),gr4 -# setlo %lo(0xfeff9c00),gr4 -# setlos #\ch,gr5 -# stbi gr5,@(gr4,#0) -# membar -.endm - - .section .rodata - - # sizes corresponding to TPXR.LMAX - .balign 1 -__tlb_lmax_sizes: - .byte 0, 64, 0, 0 - .byte 0, 0, 0, 0 - .byte 0, 0, 0, 0 - .byte 0, 0, 0, 0 - - .section .text - .balign 4 - -############################################################################### -# -# flush everything -# - void __flush_tlb_all(void) -# -############################################################################### - .globl __flush_tlb_all - .type __flush_tlb_all,@function -__flush_tlb_all: - DEBUG 'A' - - # kill cached PGE value - setlos #0xffffffff,gr4 - movgs gr4,scr0 - movgs gr4,scr1 - - # kill AMPR-cached TLB values - movgs gr0,iamlr1 - movgs gr0,iampr1 - movgs gr0,damlr1 - movgs gr0,dampr1 - - # find out how many lines there are - movsg tpxr,gr5 - sethi.p %hi(__tlb_lmax_sizes),gr4 - srli gr5,#TPXR_LMAX_SHIFT,gr5 - setlo.p %lo(__tlb_lmax_sizes),gr4 - andi gr5,#TPXR_LMAX_SMASK,gr5 - ldub @(gr4,gr5),gr4 - - # now, we assume that the TLB line step is page size in size - setlos.p #PAGE_SIZE,gr5 - setlos #0,gr6 -1: - tlbpr gr6,gr0,#6,#0 - subicc.p gr4,#1,gr4,icc0 - add gr6,gr5,gr6 - bne icc0,#2,1b - - DEBUG 'B' - bralr - - .size __flush_tlb_all, .-__flush_tlb_all - -############################################################################### -# -# flush everything to do with one context -# - void __flush_tlb_mm(unsigned long contextid [GR8]) -# -############################################################################### - .globl __flush_tlb_mm - .type __flush_tlb_mm,@function -__flush_tlb_mm: - DEBUG 'M' - - # kill cached PGE value - setlos #0xffffffff,gr4 - movgs gr4,scr0 - movgs gr4,scr1 - - # specify the context we want to flush - movgs gr8,tplr - - # find out how many lines there are - movsg tpxr,gr5 - sethi.p %hi(__tlb_lmax_sizes),gr4 - srli gr5,#TPXR_LMAX_SHIFT,gr5 - setlo.p %lo(__tlb_lmax_sizes),gr4 - andi gr5,#TPXR_LMAX_SMASK,gr5 - ldub @(gr4,gr5),gr4 - - # now, we assume that the TLB line step is page size in size - setlos.p #PAGE_SIZE,gr5 - setlos #0,gr6 -0: - tlbpr gr6,gr0,#5,#0 - subicc.p gr4,#1,gr4,icc0 - add gr6,gr5,gr6 - bne icc0,#2,0b - - DEBUG 'N' - bralr - - .size __flush_tlb_mm, .-__flush_tlb_mm - -############################################################################### -# -# flush a range of addresses from the TLB -# - void __flush_tlb_page(unsigned long contextid [GR8], -# unsigned long start [GR9]) -# -############################################################################### - .globl __flush_tlb_page - .type __flush_tlb_page,@function -__flush_tlb_page: - # kill cached PGE value - setlos #0xffffffff,gr4 - movgs gr4,scr0 - movgs gr4,scr1 - - # specify the context we want to flush - movgs gr8,tplr - - # zap the matching TLB line and AMR values - setlos #~(PAGE_SIZE-1),gr5 - and gr9,gr5,gr9 - tlbpr gr9,gr0,#5,#0 - - bralr - - .size __flush_tlb_page, .-__flush_tlb_page - -############################################################################### -# -# flush a range of addresses from the TLB -# - void __flush_tlb_range(unsigned long contextid [GR8], -# unsigned long start [GR9], -# unsigned long end [GR10]) -# -############################################################################### - .globl __flush_tlb_range - .type __flush_tlb_range,@function -__flush_tlb_range: - # kill cached PGE value - setlos #0xffffffff,gr4 - movgs gr4,scr0 - movgs gr4,scr1 - - # specify the context we want to flush - movgs gr8,tplr - - # round the start down to beginning of TLB line and end up to beginning of next TLB line - setlos.p #~(PAGE_SIZE-1),gr5 - setlos #PAGE_SIZE,gr6 - subi.p gr10,#1,gr10 - and gr9,gr5,gr9 - and gr10,gr5,gr10 -2: - tlbpr gr9,gr0,#5,#0 - subcc.p gr9,gr10,gr0,icc0 - add gr9,gr6,gr9 - bne icc0,#0,2b ; most likely a 1-page flush - - bralr - - .size __flush_tlb_range, .-__flush_tlb_range |
