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