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kernel_samsung_sm7125/arch/sparc/mm/viking.S

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Linux-2.6.12-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!
20 years ago
/* $Id: viking.S,v 1.19 2001/12/21 04:56:15 davem Exp $
* viking.S: High speed Viking cache/mmu operations
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1999 Pavel Semerad (semerad@ss1000.ms.mff.cuni.cz)
*/
#include <linux/config.h>
#include <asm/ptrace.h>
#include <asm/psr.h>
#include <asm/asm_offsets.h>
#include <asm/asi.h>
#include <asm/mxcc.h>
#include <asm/page.h>
#include <asm/pgtsrmmu.h>
#include <asm/viking.h>
#include <asm/btfixup.h>
#ifdef CONFIG_SMP
.data
.align 4
sun4dsmp_flush_tlb_spin:
.word 0
#endif
.text
.align 4
.globl viking_flush_cache_all, viking_flush_cache_mm
.globl viking_flush_cache_range, viking_flush_cache_page
.globl viking_flush_page, viking_mxcc_flush_page
.globl viking_flush_page_for_dma, viking_flush_page_to_ram
.globl viking_flush_sig_insns
.globl viking_flush_tlb_all, viking_flush_tlb_mm
.globl viking_flush_tlb_range, viking_flush_tlb_page
viking_flush_page:
sethi %hi(PAGE_OFFSET), %g2
sub %o0, %g2, %g3
srl %g3, 12, %g1 ! ppage >> 12
clr %o1 ! set counter, 0 - 127
sethi %hi(PAGE_OFFSET + PAGE_SIZE - 0x80000000), %o3
sethi %hi(0x80000000), %o4
sethi %hi(VIKING_PTAG_VALID), %o5
sethi %hi(2*PAGE_SIZE), %o0
sethi %hi(PAGE_SIZE), %g7
clr %o2 ! block counter, 0 - 3
5:
sll %o1, 5, %g4
or %g4, %o4, %g4 ! 0x80000000 | (set << 5)
sll %o2, 26, %g5 ! block << 26
6:
or %g5, %g4, %g5
ldda [%g5] ASI_M_DATAC_TAG, %g2
cmp %g3, %g1 ! ptag == ppage?
bne 7f
inc %o2
andcc %g2, %o5, %g0 ! ptag VALID?
be 7f
add %g4, %o3, %g2 ! (PAGE_OFFSET + PAGE_SIZE) | (set << 5)
ld [%g2], %g3
ld [%g2 + %g7], %g3
add %g2, %o0, %g2
ld [%g2], %g3
ld [%g2 + %g7], %g3
add %g2, %o0, %g2
ld [%g2], %g3
ld [%g2 + %g7], %g3
add %g2, %o0, %g2
ld [%g2], %g3
b 8f
ld [%g2 + %g7], %g3
7:
cmp %o2, 3
ble 6b
sll %o2, 26, %g5 ! block << 26
8: inc %o1
cmp %o1, 0x7f
ble 5b
clr %o2
9: retl
nop
viking_mxcc_flush_page:
sethi %hi(PAGE_OFFSET), %g2
sub %o0, %g2, %g3
sub %g3, -PAGE_SIZE, %g3 ! ppage + PAGE_SIZE
sethi %hi(MXCC_SRCSTREAM), %o3 ! assume %hi(MXCC_SRCSTREAM) == %hi(MXCC_DESTSTREAM)
mov 0x10, %g2 ! set cacheable bit
or %o3, %lo(MXCC_SRCSTREAM), %o2
or %o3, %lo(MXCC_DESSTREAM), %o3
sub %g3, MXCC_STREAM_SIZE, %g3
6:
stda %g2, [%o2] ASI_M_MXCC
stda %g2, [%o3] ASI_M_MXCC
andncc %g3, PAGE_MASK, %g0
bne 6b
sub %g3, MXCC_STREAM_SIZE, %g3
9: retl
nop
viking_flush_cache_page:
viking_flush_cache_range:
#ifndef CONFIG_SMP
ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */
#endif
viking_flush_cache_mm:
#ifndef CONFIG_SMP
ld [%o0 + AOFF_mm_context], %g1
cmp %g1, -1
bne viking_flush_cache_all
nop
b,a viking_flush_cache_out
#endif
viking_flush_cache_all:
WINDOW_FLUSH(%g4, %g5)
viking_flush_cache_out:
retl
nop
viking_flush_tlb_all:
mov 0x400, %g1
retl
sta %g0, [%g1] ASI_M_FLUSH_PROBE
viking_flush_tlb_mm:
mov SRMMU_CTX_REG, %g1
ld [%o0 + AOFF_mm_context], %o1
lda [%g1] ASI_M_MMUREGS, %g5
#ifndef CONFIG_SMP
cmp %o1, -1
be 1f
#endif
mov 0x300, %g2
sta %o1, [%g1] ASI_M_MMUREGS
sta %g0, [%g2] ASI_M_FLUSH_PROBE
retl
sta %g5, [%g1] ASI_M_MMUREGS
#ifndef CONFIG_SMP
1: retl
nop
#endif
viking_flush_tlb_range:
ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
mov SRMMU_CTX_REG, %g1
ld [%o0 + AOFF_mm_context], %o3
lda [%g1] ASI_M_MMUREGS, %g5
#ifndef CONFIG_SMP
cmp %o3, -1
be 2f
#endif
sethi %hi(~((1 << SRMMU_PGDIR_SHIFT) - 1)), %o4
sta %o3, [%g1] ASI_M_MMUREGS
and %o1, %o4, %o1
add %o1, 0x200, %o1
sta %g0, [%o1] ASI_M_FLUSH_PROBE
1: sub %o1, %o4, %o1
cmp %o1, %o2
blu,a 1b
sta %g0, [%o1] ASI_M_FLUSH_PROBE
retl
sta %g5, [%g1] ASI_M_MMUREGS
#ifndef CONFIG_SMP
2: retl
nop
#endif
viking_flush_tlb_page:
ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
mov SRMMU_CTX_REG, %g1
ld [%o0 + AOFF_mm_context], %o3
lda [%g1] ASI_M_MMUREGS, %g5
#ifndef CONFIG_SMP
cmp %o3, -1
be 1f
#endif
and %o1, PAGE_MASK, %o1
sta %o3, [%g1] ASI_M_MMUREGS
sta %g0, [%o1] ASI_M_FLUSH_PROBE
retl
sta %g5, [%g1] ASI_M_MMUREGS
#ifndef CONFIG_SMP
1: retl
nop
#endif
viking_flush_page_to_ram:
viking_flush_page_for_dma:
viking_flush_sig_insns:
retl
nop
#ifdef CONFIG_SMP
.globl sun4dsmp_flush_tlb_all, sun4dsmp_flush_tlb_mm
.globl sun4dsmp_flush_tlb_range, sun4dsmp_flush_tlb_page
sun4dsmp_flush_tlb_all:
sethi %hi(sun4dsmp_flush_tlb_spin), %g3
1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
tst %g5
bne 2f
mov 0x400, %g1
sta %g0, [%g1] ASI_M_FLUSH_PROBE
retl
stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2: tst %g5
bne,a 2b
ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
b,a 1b
sun4dsmp_flush_tlb_mm:
sethi %hi(sun4dsmp_flush_tlb_spin), %g3
1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
tst %g5
bne 2f
mov SRMMU_CTX_REG, %g1
ld [%o0 + AOFF_mm_context], %o1
lda [%g1] ASI_M_MMUREGS, %g5
mov 0x300, %g2
sta %o1, [%g1] ASI_M_MMUREGS
sta %g0, [%g2] ASI_M_FLUSH_PROBE
sta %g5, [%g1] ASI_M_MMUREGS
retl
stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2: tst %g5
bne,a 2b
ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
b,a 1b
sun4dsmp_flush_tlb_range:
sethi %hi(sun4dsmp_flush_tlb_spin), %g3
1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
tst %g5
bne 3f
mov SRMMU_CTX_REG, %g1
ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
ld [%o0 + AOFF_mm_context], %o3
lda [%g1] ASI_M_MMUREGS, %g5
sethi %hi(~((1 << SRMMU_PGDIR_SHIFT) - 1)), %o4
sta %o3, [%g1] ASI_M_MMUREGS
and %o1, %o4, %o1
add %o1, 0x200, %o1
sta %g0, [%o1] ASI_M_FLUSH_PROBE
2: sub %o1, %o4, %o1
cmp %o1, %o2
blu,a 2b
sta %g0, [%o1] ASI_M_FLUSH_PROBE
sta %g5, [%g1] ASI_M_MMUREGS
retl
stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
3: tst %g5
bne,a 3b
ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
b,a 1b
sun4dsmp_flush_tlb_page:
sethi %hi(sun4dsmp_flush_tlb_spin), %g3
1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
tst %g5
bne 2f
mov SRMMU_CTX_REG, %g1
ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
ld [%o0 + AOFF_mm_context], %o3
lda [%g1] ASI_M_MMUREGS, %g5
and %o1, PAGE_MASK, %o1
sta %o3, [%g1] ASI_M_MMUREGS
sta %g0, [%o1] ASI_M_FLUSH_PROBE
sta %g5, [%g1] ASI_M_MMUREGS
retl
stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2: tst %g5
bne,a 2b
ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
b,a 1b
nop
#endif