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tsunami.S
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/*
* tsunami.S: High speed MicroSparc-I mmu/cache operations.
*
* Copyright (C) 1997 David S. Miller ([email protected])
*/
#include <asm/ptrace.h>
#include <asm/asm-offsets.h>
#include <asm/psr.h>
#include <asm/asi.h>
#include <asm/page.h>
#include <asm/pgtsrmmu.h>
.text
.align 4
.globl tsunami_flush_cache_all, tsunami_flush_cache_mm
.globl tsunami_flush_cache_range, tsunami_flush_cache_page
.globl tsunami_flush_page_to_ram, tsunami_flush_page_for_dma
.globl tsunami_flush_sig_insns
.globl tsunami_flush_tlb_all, tsunami_flush_tlb_mm
.globl tsunami_flush_tlb_range, tsunami_flush_tlb_page
/* Sliiick... */
tsunami_flush_cache_page:
tsunami_flush_cache_range:
ld [%o0 + VMA_VM_MM], %o0
tsunami_flush_cache_mm:
ld [%o0 + AOFF_mm_context], %g2
cmp %g2, -1
be tsunami_flush_cache_out
tsunami_flush_cache_all:
WINDOW_FLUSH(%g4, %g5)
tsunami_flush_page_for_dma:
sta %g0, [%g0] ASI_M_IC_FLCLEAR
sta %g0, [%g0] ASI_M_DC_FLCLEAR
tsunami_flush_cache_out:
tsunami_flush_page_to_ram:
retl
nop
tsunami_flush_sig_insns:
flush %o1
retl
flush %o1 + 4
/* More slick stuff... */
tsunami_flush_tlb_range:
ld [%o0 + VMA_VM_MM], %o0
tsunami_flush_tlb_mm:
ld [%o0 + AOFF_mm_context], %g2
cmp %g2, -1
be tsunami_flush_tlb_out
tsunami_flush_tlb_all:
mov 0x400, %o1
sta %g0, [%o1] ASI_M_FLUSH_PROBE
nop
nop
nop
nop
nop
tsunami_flush_tlb_out:
retl
nop
/* This one can be done in a fine grained manner... */
tsunami_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 tsunami_flush_tlb_page_out
lda [%g1] ASI_M_MMUREGS, %g5
sta %o3, [%g1] ASI_M_MMUREGS
sta %g0, [%o1] ASI_M_FLUSH_PROBE
nop
nop
nop
nop
nop
tsunami_flush_tlb_page_out:
retl
sta %g5, [%g1] ASI_M_MMUREGS
#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3) \
ldd [src + offset + 0x18], t0; \
std t0, [dst + offset + 0x18]; \
ldd [src + offset + 0x10], t2; \
std t2, [dst + offset + 0x10]; \
ldd [src + offset + 0x08], t0; \
std t0, [dst + offset + 0x08]; \
ldd [src + offset + 0x00], t2; \
std t2, [dst + offset + 0x00];
tsunami_copy_1page:
/* NOTE: This routine has to be shorter than 70insns --jj */
or %g0, (PAGE_SIZE >> 8), %g1
1:
MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5)
MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5)
subcc %g1, 1, %g1
add %o0, 0x100, %o0
bne 1b
add %o1, 0x100, %o1
.globl tsunami_setup_blockops
tsunami_setup_blockops:
sethi %hi(__copy_1page), %o0
or %o0, %lo(__copy_1page), %o0
sethi %hi(tsunami_copy_1page), %o1
or %o1, %lo(tsunami_copy_1page), %o1
sethi %hi(tsunami_setup_blockops), %o2
or %o2, %lo(tsunami_setup_blockops), %o2
ld [%o1], %o4
1: add %o1, 4, %o1
st %o4, [%o0]
add %o0, 4, %o0
cmp %o1, %o2
bne 1b
ld [%o1], %o4
sta %g0, [%g0] ASI_M_IC_FLCLEAR
sta %g0, [%g0] ASI_M_DC_FLCLEAR
retl
nop