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/* SPDX-License-Identifier: GPL-2.0 */
/*
* swift.S: MicroSparc-II mmu/cache operations.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
*/
#include <asm/psr.h>
#include <asm/asi.h>
#include <asm/page.h>
#include <asm/pgtsrmmu.h>
#include <asm/asm-offsets.h>
.text
.align 4
#if 1 /* XXX screw this, I can't get the VAC flushes working
* XXX reliably... -DaveM
*/
.globl swift_flush_cache_all, swift_flush_cache_mm
.globl swift_flush_cache_range, swift_flush_cache_page
.globl swift_flush_page_for_dma
.globl swift_flush_page_to_ram
swift_flush_cache_all:
swift_flush_cache_mm:
swift_flush_cache_range:
swift_flush_cache_page:
swift_flush_page_for_dma:
swift_flush_page_to_ram:
sethi %hi(0x2000), %o0
1: subcc %o0, 0x10, %o0
add %o0, %o0, %o1
sta %g0, [%o0] ASI_M_DATAC_TAG
bne 1b
sta %g0, [%o1] ASI_M_TXTC_TAG
retl
nop
#else
.globl swift_flush_cache_all
swift_flush_cache_all:
WINDOW_FLUSH(%g4, %g5)
/* Just clear out all the tags. */
sethi %hi(16 * 1024), %o0
1: subcc %o0, 16, %o0
sta %g0, [%o0] ASI_M_TXTC_TAG
bne 1b
sta %g0, [%o0] ASI_M_DATAC_TAG
retl
nop
.globl swift_flush_cache_mm
swift_flush_cache_mm:
ld [%o0 + AOFF_mm_context], %g2
cmp %g2, -1
be swift_flush_cache_mm_out
WINDOW_FLUSH(%g4, %g5)
rd %psr, %g1
andn %g1, PSR_ET, %g3
wr %g3, 0x0, %psr
nop
nop
mov SRMMU_CTX_REG, %g7
lda [%g7] ASI_M_MMUREGS, %g5
sta %g2, [%g7] ASI_M_MMUREGS
#if 1
sethi %hi(0x2000), %o0
1: subcc %o0, 0x10, %o0
sta %g0, [%o0] ASI_M_FLUSH_CTX
bne 1b
nop
#else
clr %o0
or %g0, 2048, %g7
or %g0, 2048, %o1
add %o1, 2048, %o2
add %o2, 2048, %o3
mov 16, %o4
add %o4, 2048, %o5
add %o5, 2048, %g2
add %g2, 2048, %g3
1: sta %g0, [%o0 ] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %o1] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %o2] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %o3] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %o4] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %o5] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %g2] ASI_M_FLUSH_CTX
sta %g0, [%o0 + %g3] ASI_M_FLUSH_CTX
subcc %g7, 32, %g7
bne 1b
add %o0, 32, %o0
#endif
mov SRMMU_CTX_REG, %g7
sta %g5, [%g7] ASI_M_MMUREGS
wr %g1, 0x0, %psr
nop
nop
swift_flush_cache_mm_out:
retl
nop
.globl swift_flush_cache_range
swift_flush_cache_range:
ld [%o0 + VMA_VM_MM], %o0
sub %o2, %o1, %o2
sethi %hi(4096), %o3
cmp %o2, %o3
bgu swift_flush_cache_mm
nop
b 70f
nop
.globl swift_flush_cache_page
swift_flush_cache_page:
ld [%o0 + VMA_VM_MM], %o0
70:
ld [%o0 + AOFF_mm_context], %g2
cmp %g2, -1
be swift_flush_cache_page_out
WINDOW_FLUSH(%g4, %g5)
rd %psr, %g1
andn %g1, PSR_ET, %g3
wr %g3, 0x0, %psr
nop
nop
mov SRMMU_CTX_REG, %g7
lda [%g7] ASI_M_MMUREGS, %g5
sta %g2, [%g7] ASI_M_MMUREGS
andn %o1, (PAGE_SIZE - 1), %o1
#if 1
sethi %hi(0x1000), %o0
1: subcc %o0, 0x10, %o0
sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE
bne 1b
nop
#else
or %g0, 512, %g7
or %g0, 512, %o0
add %o0, 512, %o2
add %o2, 512, %o3
add %o3, 512, %o4
add %o4, 512, %o5
add %o5, 512, %g3
add %g3, 512, %g4
1: sta %g0, [%o1 ] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o2] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o3] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o4] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o5] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE
subcc %g7, 16, %g7
bne 1b
add %o1, 16, %o1
#endif
mov SRMMU_CTX_REG, %g7
sta %g5, [%g7] ASI_M_MMUREGS
wr %g1, 0x0, %psr
nop
nop
swift_flush_cache_page_out:
retl
nop
/* Swift is write-thru, however it is not
* I/O nor TLB-walk coherent. Also it has
* caches which are virtually indexed and tagged.
*/
.globl swift_flush_page_for_dma
.globl swift_flush_page_to_ram
swift_flush_page_for_dma:
swift_flush_page_to_ram:
andn %o0, (PAGE_SIZE - 1), %o1
#if 1
sethi %hi(0x1000), %o0
1: subcc %o0, 0x10, %o0
sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE
bne 1b
nop
#else
or %g0, 512, %g7
or %g0, 512, %o0
add %o0, 512, %o2
add %o2, 512, %o3
add %o3, 512, %o4
add %o4, 512, %o5
add %o5, 512, %g3
add %g3, 512, %g4
1: sta %g0, [%o1 ] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o2] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o3] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o4] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %o5] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE
sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE
subcc %g7, 16, %g7
bne 1b
add %o1, 16, %o1
#endif
retl
nop
#endif
.globl swift_flush_sig_insns
swift_flush_sig_insns:
flush %o1
retl
flush %o1 + 4
.globl swift_flush_tlb_mm
.globl swift_flush_tlb_range
.globl swift_flush_tlb_all
swift_flush_tlb_range:
ld [%o0 + VMA_VM_MM], %o0
swift_flush_tlb_mm:
ld [%o0 + AOFF_mm_context], %g2
cmp %g2, -1
be swift_flush_tlb_all_out
swift_flush_tlb_all:
mov 0x400, %o1
sta %g0, [%o1] ASI_M_FLUSH_PROBE
swift_flush_tlb_all_out:
retl
nop
.globl swift_flush_tlb_page
swift_flush_tlb_page:
ld [%o0 + VMA_VM_MM], %o0
mov SRMMU_CTX_REG, %g1
ld [%o0 + AOFF_mm_context], %o3
andn %o1, (PAGE_SIZE - 1), %o1
cmp %o3, -1
be swift_flush_tlb_page_out
nop
#if 1
mov 0x400, %o1
sta %g0, [%o1] ASI_M_FLUSH_PROBE
#else
lda [%g1] ASI_M_MMUREGS, %g5
sta %o3, [%g1] ASI_M_MMUREGS
sta %g0, [%o1] ASI_M_FLUSH_PAGE /* rem. virt. cache. prot. */
sta %g0, [%o1] ASI_M_FLUSH_PROBE
sta %g5, [%g1] ASI_M_MMUREGS
#endif
swift_flush_tlb_page_out:
retl
nop
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