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xianfeng |
/* $Id: hypersparc.S,v 1.18 2001/12/21 04:56:15 davem Exp $
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* hypersparc.S: High speed Hypersparc mmu/cache operations.
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*
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* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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.text
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.align 4
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.globl hypersparc_flush_cache_all, hypersparc_flush_cache_mm
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.globl hypersparc_flush_cache_range, hypersparc_flush_cache_page
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.globl hypersparc_flush_page_to_ram
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.globl hypersparc_flush_page_for_dma, hypersparc_flush_sig_insns
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.globl hypersparc_flush_tlb_all, hypersparc_flush_tlb_mm
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.globl hypersparc_flush_tlb_range, hypersparc_flush_tlb_page
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hypersparc_flush_cache_all:
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WINDOW_FLUSH(%g4, %g5)
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sethi %hi(vac_cache_size), %g4
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ld [%g4 + %lo(vac_cache_size)], %g5
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sethi %hi(vac_line_size), %g1
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ld [%g1 + %lo(vac_line_size)], %g2
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1:
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subcc %g5, %g2, %g5 ! hyper_flush_unconditional_combined
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bne 1b
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sta %g0, [%g5] ASI_M_FLUSH_CTX
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retl
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sta %g0, [%g0] ASI_M_FLUSH_IWHOLE ! hyper_flush_whole_icache
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/* We expand the window flush to get maximum performance. */
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hypersparc_flush_cache_mm:
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#ifndef CONFIG_SMP
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ld [%o0 + AOFF_mm_context], %g1
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cmp %g1, -1
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be hypersparc_flush_cache_mm_out
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#endif
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WINDOW_FLUSH(%g4, %g5)
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sethi %hi(vac_line_size), %g1
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ld [%g1 + %lo(vac_line_size)], %o1
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sethi %hi(vac_cache_size), %g2
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ld [%g2 + %lo(vac_cache_size)], %o0
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add %o1, %o1, %g1
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add %o1, %g1, %g2
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add %o1, %g2, %g3
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add %o1, %g3, %g4
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add %o1, %g4, %g5
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add %o1, %g5, %o4
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add %o1, %o4, %o5
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/* BLAMMO! */
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1:
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subcc %o0, %o5, %o0 ! hyper_flush_cache_user
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sta %g0, [%o0 + %g0] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %o1] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %g1] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %g2] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %g3] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %g4] ASI_M_FLUSH_USER
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sta %g0, [%o0 + %g5] ASI_M_FLUSH_USER
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bne 1b
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sta %g0, [%o0 + %o4] ASI_M_FLUSH_USER
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hypersparc_flush_cache_mm_out:
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retl
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nop
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/* The things we do for performance... */
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hypersparc_flush_cache_range:
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ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */
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#ifndef CONFIG_SMP
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ld [%o0 + AOFF_mm_context], %g1
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cmp %g1, -1
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be hypersparc_flush_cache_range_out
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#endif
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WINDOW_FLUSH(%g4, %g5)
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sethi %hi(vac_line_size), %g1
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ld [%g1 + %lo(vac_line_size)], %o4
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sethi %hi(vac_cache_size), %g2
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ld [%g2 + %lo(vac_cache_size)], %o3
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/* Here comes the fun part... */
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add %o2, (PAGE_SIZE - 1), %o2
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andn %o1, (PAGE_SIZE - 1), %o1
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add %o4, %o4, %o5
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andn %o2, (PAGE_SIZE - 1), %o2
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add %o4, %o5, %g1
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sub %o2, %o1, %g4
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add %o4, %g1, %g2
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sll %o3, 2, %g5
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add %o4, %g2, %g3
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cmp %g4, %g5
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add %o4, %g3, %g4
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blu 0f
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add %o4, %g4, %g5
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add %o4, %g5, %g7
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/* Flush entire user space, believe it or not this is quicker
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* than page at a time flushings for range > (cache_size<<2).
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*/
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1:
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subcc %o3, %g7, %o3
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sta %g0, [%o3 + %g0] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %o4] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %o5] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %g1] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %g2] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %g3] ASI_M_FLUSH_USER
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sta %g0, [%o3 + %g4] ASI_M_FLUSH_USER
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bne 1b
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sta %g0, [%o3 + %g5] ASI_M_FLUSH_USER
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retl
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nop
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/* Below our threshold, flush one page at a time. */
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0:
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ld [%o0 + AOFF_mm_context], %o0
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mov SRMMU_CTX_REG, %g7
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lda [%g7] ASI_M_MMUREGS, %o3
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sta %o0, [%g7] ASI_M_MMUREGS
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add %o2, -PAGE_SIZE, %o0
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1:
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or %o0, 0x400, %g7
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lda [%g7] ASI_M_FLUSH_PROBE, %g7
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orcc %g7, 0, %g0
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be,a 3f
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mov %o0, %o2
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add %o4, %g5, %g7
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2:
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sub %o2, %g7, %o2
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sta %g0, [%o2 + %g0] ASI_M_FLUSH_PAGE
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sta %g0, [%o2 + %o4] ASI_M_FLUSH_PAGE
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sta %g0, [%o2 + %o5] ASI_M_FLUSH_PAGE
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sta %g0, [%o2 + %g1] ASI_M_FLUSH_PAGE
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sta %g0, [%o2 + %g2] ASI_M_FLUSH_PAGE
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sta %g0, [%o2 + %g3] ASI_M_FLUSH_PAGE
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andcc %o2, 0xffc, %g0
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sta %g0, [%o2 + %g4] ASI_M_FLUSH_PAGE
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bne 2b
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sta %g0, [%o2 + %g5] ASI_M_FLUSH_PAGE
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3:
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cmp %o2, %o1
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bne 1b
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add %o2, -PAGE_SIZE, %o0
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mov SRMMU_FAULT_STATUS, %g5
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lda [%g5] ASI_M_MMUREGS, %g0
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mov SRMMU_CTX_REG, %g7
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sta %o3, [%g7] ASI_M_MMUREGS
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hypersparc_flush_cache_range_out:
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retl
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nop
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/* HyperSparc requires a valid mapping where we are about to flush
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* in order to check for a physical tag match during the flush.
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*/
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/* Verified, my ass... */
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hypersparc_flush_cache_page:
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ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */
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ld [%o0 + AOFF_mm_context], %g2
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#ifndef CONFIG_SMP
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cmp %g2, -1
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be hypersparc_flush_cache_page_out
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#endif
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WINDOW_FLUSH(%g4, %g5)
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sethi %hi(vac_line_size), %g1
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ld [%g1 + %lo(vac_line_size)], %o4
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mov SRMMU_CTX_REG, %o3
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andn %o1, (PAGE_SIZE - 1), %o1
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lda [%o3] ASI_M_MMUREGS, %o2
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sta %g2, [%o3] ASI_M_MMUREGS
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or %o1, 0x400, %o5
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lda [%o5] ASI_M_FLUSH_PROBE, %g1
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orcc %g0, %g1, %g0
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be 2f
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add %o4, %o4, %o5
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sub %o1, -PAGE_SIZE, %o1
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add %o4, %o5, %g1
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add %o4, %g1, %g2
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add %o4, %g2, %g3
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add %o4, %g3, %g4
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add %o4, %g4, %g5
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add %o4, %g5, %g7
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/* BLAMMO! */
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1:
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sub %o1, %g7, %o1
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sta %g0, [%o1 + %g0] 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 + %g1] ASI_M_FLUSH_PAGE
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sta %g0, [%o1 + %g2] ASI_M_FLUSH_PAGE
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sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE
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andcc %o1, 0xffc, %g0
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sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE
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bne 1b
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sta %g0, [%o1 + %g5] ASI_M_FLUSH_PAGE
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2:
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mov SRMMU_FAULT_STATUS, %g7
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mov SRMMU_CTX_REG, %g4
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lda [%g7] ASI_M_MMUREGS, %g0
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sta %o2, [%g4] ASI_M_MMUREGS
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hypersparc_flush_cache_page_out:
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retl
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nop
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hypersparc_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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/* HyperSparc is copy-back. */
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hypersparc_flush_page_to_ram:
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sethi %hi(vac_line_size), %g1
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ld [%g1 + %lo(vac_line_size)], %o4
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andn %o0, (PAGE_SIZE - 1), %o0
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add %o4, %o4, %o5
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or %o0, 0x400, %g7
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lda [%g7] ASI_M_FLUSH_PROBE, %g5
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add %o4, %o5, %g1
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orcc %g5, 0, %g0
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be 2f
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add %o4, %g1, %g2
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add %o4, %g2, %g3
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sub %o0, -PAGE_SIZE, %o0
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add %o4, %g3, %g4
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add %o4, %g4, %g5
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add %o4, %g5, %g7
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| 238 |
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/* BLAMMO! */
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1:
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sub %o0, %g7, %o0
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| 241 |
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sta %g0, [%o0 + %g0] ASI_M_FLUSH_PAGE
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| 242 |
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sta %g0, [%o0 + %o4] ASI_M_FLUSH_PAGE
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sta %g0, [%o0 + %o5] ASI_M_FLUSH_PAGE
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sta %g0, [%o0 + %g1] ASI_M_FLUSH_PAGE
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| 245 |
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sta %g0, [%o0 + %g2] ASI_M_FLUSH_PAGE
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| 246 |
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sta %g0, [%o0 + %g3] ASI_M_FLUSH_PAGE
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| 247 |
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andcc %o0, 0xffc, %g0
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| 248 |
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sta %g0, [%o0 + %g4] ASI_M_FLUSH_PAGE
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bne 1b
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| 250 |
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sta %g0, [%o0 + %g5] ASI_M_FLUSH_PAGE
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| 251 |
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2:
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| 252 |
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mov SRMMU_FAULT_STATUS, %g1
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retl
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| 254 |
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lda [%g1] ASI_M_MMUREGS, %g0
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| 255 |
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| 256 |
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/* HyperSparc is IO cache coherent. */
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hypersparc_flush_page_for_dma:
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retl
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| 259 |
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nop
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| 260 |
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| 261 |
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/* It was noted that at boot time a TLB flush all in a delay slot
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| 262 |
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* can deliver an illegal instruction to the processor if the timing
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| 263 |
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* is just right...
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| 264 |
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*/
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| 265 |
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hypersparc_flush_tlb_all:
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| 266 |
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mov 0x400, %g1
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| 267 |
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sta %g0, [%g1] ASI_M_FLUSH_PROBE
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| 268 |
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retl
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| 269 |
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nop
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| 270 |
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| 271 |
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hypersparc_flush_tlb_mm:
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| 272 |
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mov SRMMU_CTX_REG, %g1
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ld [%o0 + AOFF_mm_context], %o1
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| 274 |
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lda [%g1] ASI_M_MMUREGS, %g5
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| 275 |
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#ifndef CONFIG_SMP
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| 276 |
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cmp %o1, -1
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| 277 |
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be hypersparc_flush_tlb_mm_out
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| 278 |
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#endif
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| 279 |
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mov 0x300, %g2
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| 280 |
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sta %o1, [%g1] ASI_M_MMUREGS
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| 281 |
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sta %g0, [%g2] ASI_M_FLUSH_PROBE
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| 282 |
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hypersparc_flush_tlb_mm_out:
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| 283 |
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retl
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| 284 |
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sta %g5, [%g1] ASI_M_MMUREGS
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| 285 |
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| 286 |
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hypersparc_flush_tlb_range:
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| 287 |
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ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
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| 288 |
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mov SRMMU_CTX_REG, %g1
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| 289 |
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ld [%o0 + AOFF_mm_context], %o3
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| 290 |
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lda [%g1] ASI_M_MMUREGS, %g5
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| 291 |
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#ifndef CONFIG_SMP
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| 292 |
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cmp %o3, -1
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| 293 |
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be hypersparc_flush_tlb_range_out
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| 294 |
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#endif
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| 295 |
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sethi %hi(~((1 << SRMMU_PGDIR_SHIFT) - 1)), %o4
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| 296 |
|
|
sta %o3, [%g1] ASI_M_MMUREGS
|
| 297 |
|
|
and %o1, %o4, %o1
|
| 298 |
|
|
add %o1, 0x200, %o1
|
| 299 |
|
|
sta %g0, [%o1] ASI_M_FLUSH_PROBE
|
| 300 |
|
|
1:
|
| 301 |
|
|
sub %o1, %o4, %o1
|
| 302 |
|
|
cmp %o1, %o2
|
| 303 |
|
|
blu,a 1b
|
| 304 |
|
|
sta %g0, [%o1] ASI_M_FLUSH_PROBE
|
| 305 |
|
|
hypersparc_flush_tlb_range_out:
|
| 306 |
|
|
retl
|
| 307 |
|
|
sta %g5, [%g1] ASI_M_MMUREGS
|
| 308 |
|
|
|
| 309 |
|
|
hypersparc_flush_tlb_page:
|
| 310 |
|
|
ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */
|
| 311 |
|
|
mov SRMMU_CTX_REG, %g1
|
| 312 |
|
|
ld [%o0 + AOFF_mm_context], %o3
|
| 313 |
|
|
andn %o1, (PAGE_SIZE - 1), %o1
|
| 314 |
|
|
#ifndef CONFIG_SMP
|
| 315 |
|
|
cmp %o3, -1
|
| 316 |
|
|
be hypersparc_flush_tlb_page_out
|
| 317 |
|
|
#endif
|
| 318 |
|
|
lda [%g1] ASI_M_MMUREGS, %g5
|
| 319 |
|
|
sta %o3, [%g1] ASI_M_MMUREGS
|
| 320 |
|
|
sta %g0, [%o1] ASI_M_FLUSH_PROBE
|
| 321 |
|
|
hypersparc_flush_tlb_page_out:
|
| 322 |
|
|
retl
|
| 323 |
|
|
sta %g5, [%g1] ASI_M_MMUREGS
|
| 324 |
|
|
|
| 325 |
|
|
__INIT
|
| 326 |
|
|
|
| 327 |
|
|
/* High speed page clear/copy. */
|
| 328 |
|
|
hypersparc_bzero_1page:
|
| 329 |
|
|
/* NOTE: This routine has to be shorter than 40insns --jj */
|
| 330 |
|
|
clr %g1
|
| 331 |
|
|
mov 32, %g2
|
| 332 |
|
|
mov 64, %g3
|
| 333 |
|
|
mov 96, %g4
|
| 334 |
|
|
mov 128, %g5
|
| 335 |
|
|
mov 160, %g7
|
| 336 |
|
|
mov 192, %o2
|
| 337 |
|
|
mov 224, %o3
|
| 338 |
|
|
mov 16, %o1
|
| 339 |
|
|
1:
|
| 340 |
|
|
stda %g0, [%o0 + %g0] ASI_M_BFILL
|
| 341 |
|
|
stda %g0, [%o0 + %g2] ASI_M_BFILL
|
| 342 |
|
|
stda %g0, [%o0 + %g3] ASI_M_BFILL
|
| 343 |
|
|
stda %g0, [%o0 + %g4] ASI_M_BFILL
|
| 344 |
|
|
stda %g0, [%o0 + %g5] ASI_M_BFILL
|
| 345 |
|
|
stda %g0, [%o0 + %g7] ASI_M_BFILL
|
| 346 |
|
|
stda %g0, [%o0 + %o2] ASI_M_BFILL
|
| 347 |
|
|
stda %g0, [%o0 + %o3] ASI_M_BFILL
|
| 348 |
|
|
subcc %o1, 1, %o1
|
| 349 |
|
|
bne 1b
|
| 350 |
|
|
add %o0, 256, %o0
|
| 351 |
|
|
|
| 352 |
|
|
retl
|
| 353 |
|
|
nop
|
| 354 |
|
|
|
| 355 |
|
|
hypersparc_copy_1page:
|
| 356 |
|
|
/* NOTE: This routine has to be shorter than 70insns --jj */
|
| 357 |
|
|
sub %o1, %o0, %o2 ! difference
|
| 358 |
|
|
mov 16, %g1
|
| 359 |
|
|
1:
|
| 360 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 361 |
|
|
add %o0, 32, %o0
|
| 362 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 363 |
|
|
add %o0, 32, %o0
|
| 364 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 365 |
|
|
add %o0, 32, %o0
|
| 366 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 367 |
|
|
add %o0, 32, %o0
|
| 368 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 369 |
|
|
add %o0, 32, %o0
|
| 370 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 371 |
|
|
add %o0, 32, %o0
|
| 372 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 373 |
|
|
add %o0, 32, %o0
|
| 374 |
|
|
sta %o0, [%o0 + %o2] ASI_M_BCOPY
|
| 375 |
|
|
subcc %g1, 1, %g1
|
| 376 |
|
|
bne 1b
|
| 377 |
|
|
add %o0, 32, %o0
|
| 378 |
|
|
|
| 379 |
|
|
retl
|
| 380 |
|
|
nop
|
| 381 |
|
|
|
| 382 |
|
|
.globl hypersparc_setup_blockops
|
| 383 |
|
|
hypersparc_setup_blockops:
|
| 384 |
|
|
sethi %hi(bzero_1page), %o0
|
| 385 |
|
|
or %o0, %lo(bzero_1page), %o0
|
| 386 |
|
|
sethi %hi(hypersparc_bzero_1page), %o1
|
| 387 |
|
|
or %o1, %lo(hypersparc_bzero_1page), %o1
|
| 388 |
|
|
sethi %hi(hypersparc_copy_1page), %o2
|
| 389 |
|
|
or %o2, %lo(hypersparc_copy_1page), %o2
|
| 390 |
|
|
ld [%o1], %o4
|
| 391 |
|
|
1:
|
| 392 |
|
|
add %o1, 4, %o1
|
| 393 |
|
|
st %o4, [%o0]
|
| 394 |
|
|
add %o0, 4, %o0
|
| 395 |
|
|
cmp %o1, %o2
|
| 396 |
|
|
bne 1b
|
| 397 |
|
|
ld [%o1], %o4
|
| 398 |
|
|
sethi %hi(__copy_1page), %o0
|
| 399 |
|
|
or %o0, %lo(__copy_1page), %o0
|
| 400 |
|
|
sethi %hi(hypersparc_setup_blockops), %o2
|
| 401 |
|
|
or %o2, %lo(hypersparc_setup_blockops), %o2
|
| 402 |
|
|
ld [%o1], %o4
|
| 403 |
|
|
1:
|
| 404 |
|
|
add %o1, 4, %o1
|
| 405 |
|
|
st %o4, [%o0]
|
| 406 |
|
|
add %o0, 4, %o0
|
| 407 |
|
|
cmp %o1, %o2
|
| 408 |
|
|
bne 1b
|
| 409 |
|
|
ld [%o1], %o4
|
| 410 |
|
|
sta %g0, [%g0] ASI_M_FLUSH_IWHOLE
|
| 411 |
|
|
retl
|
| 412 |
|
|
nop
|
