| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * hypersparc.S: High speed Hypersparc mmu/cache operations. |
| * |
| * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
| */ |
| |
| #include <asm/ptrace.h> |
| #include <asm/psr.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/asi.h> |
| #include <asm/page.h> |
| #include <asm/pgtable.h> |
| #include <asm/pgtsrmmu.h> |
| #include <linux/init.h> |
| |
| .text |
| .align 4 |
| |
| .globl hypersparc_flush_cache_all, hypersparc_flush_cache_mm |
| .globl hypersparc_flush_cache_range, hypersparc_flush_cache_page |
| .globl hypersparc_flush_page_to_ram |
| .globl hypersparc_flush_page_for_dma, hypersparc_flush_sig_insns |
| .globl hypersparc_flush_tlb_all, hypersparc_flush_tlb_mm |
| .globl hypersparc_flush_tlb_range, hypersparc_flush_tlb_page |
| |
| hypersparc_flush_cache_all: |
| WINDOW_FLUSH(%g4, %g5) |
| sethi %hi(vac_cache_size), %g4 |
| ld [%g4 + %lo(vac_cache_size)], %g5 |
| sethi %hi(vac_line_size), %g1 |
| ld [%g1 + %lo(vac_line_size)], %g2 |
| 1: |
| subcc %g5, %g2, %g5 ! hyper_flush_unconditional_combined |
| bne 1b |
| sta %g0, [%g5] ASI_M_FLUSH_CTX |
| retl |
| sta %g0, [%g0] ASI_M_FLUSH_IWHOLE ! hyper_flush_whole_icache |
| |
| /* We expand the window flush to get maximum performance. */ |
| hypersparc_flush_cache_mm: |
| #ifndef CONFIG_SMP |
| ld [%o0 + AOFF_mm_context], %g1 |
| cmp %g1, -1 |
| be hypersparc_flush_cache_mm_out |
| #endif |
| WINDOW_FLUSH(%g4, %g5) |
| |
| sethi %hi(vac_line_size), %g1 |
| ld [%g1 + %lo(vac_line_size)], %o1 |
| sethi %hi(vac_cache_size), %g2 |
| ld [%g2 + %lo(vac_cache_size)], %o0 |
| add %o1, %o1, %g1 |
| add %o1, %g1, %g2 |
| add %o1, %g2, %g3 |
| add %o1, %g3, %g4 |
| add %o1, %g4, %g5 |
| add %o1, %g5, %o4 |
| add %o1, %o4, %o5 |
| |
| /* BLAMMO! */ |
| 1: |
| subcc %o0, %o5, %o0 ! hyper_flush_cache_user |
| sta %g0, [%o0 + %g0] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %o1] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %g1] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %g2] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %g3] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %g4] ASI_M_FLUSH_USER |
| sta %g0, [%o0 + %g5] ASI_M_FLUSH_USER |
| bne 1b |
| sta %g0, [%o0 + %o4] ASI_M_FLUSH_USER |
| hypersparc_flush_cache_mm_out: |
| retl |
| nop |
| |
| /* The things we do for performance... */ |
| hypersparc_flush_cache_range: |
| ld [%o0 + VMA_VM_MM], %o0 |
| #ifndef CONFIG_SMP |
| ld [%o0 + AOFF_mm_context], %g1 |
| cmp %g1, -1 |
| be hypersparc_flush_cache_range_out |
| #endif |
| WINDOW_FLUSH(%g4, %g5) |
| |
| sethi %hi(vac_line_size), %g1 |
| ld [%g1 + %lo(vac_line_size)], %o4 |
| sethi %hi(vac_cache_size), %g2 |
| ld [%g2 + %lo(vac_cache_size)], %o3 |
| |
| /* Here comes the fun part... */ |
| add %o2, (PAGE_SIZE - 1), %o2 |
| andn %o1, (PAGE_SIZE - 1), %o1 |
| add %o4, %o4, %o5 |
| andn %o2, (PAGE_SIZE - 1), %o2 |
| add %o4, %o5, %g1 |
| sub %o2, %o1, %g4 |
| add %o4, %g1, %g2 |
| sll %o3, 2, %g5 |
| add %o4, %g2, %g3 |
| cmp %g4, %g5 |
| add %o4, %g3, %g4 |
| blu 0f |
| add %o4, %g4, %g5 |
| add %o4, %g5, %g7 |
| |
| /* Flush entire user space, believe it or not this is quicker |
| * than page at a time flushings for range > (cache_size<<2). |
| */ |
| 1: |
| subcc %o3, %g7, %o3 |
| sta %g0, [%o3 + %g0] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %o4] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %o5] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %g1] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %g2] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %g3] ASI_M_FLUSH_USER |
| sta %g0, [%o3 + %g4] ASI_M_FLUSH_USER |
| bne 1b |
| sta %g0, [%o3 + %g5] ASI_M_FLUSH_USER |
| retl |
| nop |
| |
| /* Below our threshold, flush one page at a time. */ |
| 0: |
| ld [%o0 + AOFF_mm_context], %o0 |
| mov SRMMU_CTX_REG, %g7 |
| lda [%g7] ASI_M_MMUREGS, %o3 |
| sta %o0, [%g7] ASI_M_MMUREGS |
| add %o2, -PAGE_SIZE, %o0 |
| 1: |
| or %o0, 0x400, %g7 |
| lda [%g7] ASI_M_FLUSH_PROBE, %g7 |
| orcc %g7, 0, %g0 |
| be,a 3f |
| mov %o0, %o2 |
| add %o4, %g5, %g7 |
| 2: |
| sub %o2, %g7, %o2 |
| sta %g0, [%o2 + %g0] ASI_M_FLUSH_PAGE |
| sta %g0, [%o2 + %o4] ASI_M_FLUSH_PAGE |
| sta %g0, [%o2 + %o5] ASI_M_FLUSH_PAGE |
| sta %g0, [%o2 + %g1] ASI_M_FLUSH_PAGE |
| sta %g0, [%o2 + %g2] ASI_M_FLUSH_PAGE |
| sta %g0, [%o2 + %g3] ASI_M_FLUSH_PAGE |
| andcc %o2, 0xffc, %g0 |
| sta %g0, [%o2 + %g4] ASI_M_FLUSH_PAGE |
| bne 2b |
| sta %g0, [%o2 + %g5] ASI_M_FLUSH_PAGE |
| 3: |
| cmp %o2, %o1 |
| bne 1b |
| add %o2, -PAGE_SIZE, %o0 |
| mov SRMMU_FAULT_STATUS, %g5 |
| lda [%g5] ASI_M_MMUREGS, %g0 |
| mov SRMMU_CTX_REG, %g7 |
| sta %o3, [%g7] ASI_M_MMUREGS |
| hypersparc_flush_cache_range_out: |
| retl |
| nop |
| |
| /* HyperSparc requires a valid mapping where we are about to flush |
| * in order to check for a physical tag match during the flush. |
| */ |
| /* Verified, my ass... */ |
| hypersparc_flush_cache_page: |
| ld [%o0 + VMA_VM_MM], %o0 |
| ld [%o0 + AOFF_mm_context], %g2 |
| #ifndef CONFIG_SMP |
| cmp %g2, -1 |
| be hypersparc_flush_cache_page_out |
| #endif |
| WINDOW_FLUSH(%g4, %g5) |
| |
| sethi %hi(vac_line_size), %g1 |
| ld [%g1 + %lo(vac_line_size)], %o4 |
| mov SRMMU_CTX_REG, %o3 |
| andn %o1, (PAGE_SIZE - 1), %o1 |
| lda [%o3] ASI_M_MMUREGS, %o2 |
| sta %g2, [%o3] ASI_M_MMUREGS |
| or %o1, 0x400, %o5 |
| lda [%o5] ASI_M_FLUSH_PROBE, %g1 |
| orcc %g0, %g1, %g0 |
| be 2f |
| add %o4, %o4, %o5 |
| sub %o1, -PAGE_SIZE, %o1 |
| add %o4, %o5, %g1 |
| add %o4, %g1, %g2 |
| add %o4, %g2, %g3 |
| add %o4, %g3, %g4 |
| add %o4, %g4, %g5 |
| add %o4, %g5, %g7 |
| |
| /* BLAMMO! */ |
| 1: |
| sub %o1, %g7, %o1 |
| sta %g0, [%o1 + %g0] ASI_M_FLUSH_PAGE |
| sta %g0, [%o1 + %o4] ASI_M_FLUSH_PAGE |
| sta %g0, [%o1 + %o5] ASI_M_FLUSH_PAGE |
| sta %g0, [%o1 + %g1] ASI_M_FLUSH_PAGE |
| sta %g0, [%o1 + %g2] ASI_M_FLUSH_PAGE |
| sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE |
| andcc %o1, 0xffc, %g0 |
| sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE |
| bne 1b |
| sta %g0, [%o1 + %g5] ASI_M_FLUSH_PAGE |
| 2: |
| mov SRMMU_FAULT_STATUS, %g7 |
| mov SRMMU_CTX_REG, %g4 |
| lda [%g7] ASI_M_MMUREGS, %g0 |
| sta %o2, [%g4] ASI_M_MMUREGS |
| hypersparc_flush_cache_page_out: |
| retl |
| nop |
| |
| hypersparc_flush_sig_insns: |
| flush %o1 |
| retl |
| flush %o1 + 4 |
| |
| /* HyperSparc is copy-back. */ |
| hypersparc_flush_page_to_ram: |
| sethi %hi(vac_line_size), %g1 |
| ld [%g1 + %lo(vac_line_size)], %o4 |
| andn %o0, (PAGE_SIZE - 1), %o0 |
| add %o4, %o4, %o5 |
| or %o0, 0x400, %g7 |
| lda [%g7] ASI_M_FLUSH_PROBE, %g5 |
| add %o4, %o5, %g1 |
| orcc %g5, 0, %g0 |
| be 2f |
| add %o4, %g1, %g2 |
| add %o4, %g2, %g3 |
| sub %o0, -PAGE_SIZE, %o0 |
| add %o4, %g3, %g4 |
| add %o4, %g4, %g5 |
| add %o4, %g5, %g7 |
| |
| /* BLAMMO! */ |
| 1: |
| sub %o0, %g7, %o0 |
| sta %g0, [%o0 + %g0] ASI_M_FLUSH_PAGE |
| sta %g0, [%o0 + %o4] ASI_M_FLUSH_PAGE |
| sta %g0, [%o0 + %o5] ASI_M_FLUSH_PAGE |
| sta %g0, [%o0 + %g1] ASI_M_FLUSH_PAGE |
| sta %g0, [%o0 + %g2] ASI_M_FLUSH_PAGE |
| sta %g0, [%o0 + %g3] ASI_M_FLUSH_PAGE |
| andcc %o0, 0xffc, %g0 |
| sta %g0, [%o0 + %g4] ASI_M_FLUSH_PAGE |
| bne 1b |
| sta %g0, [%o0 + %g5] ASI_M_FLUSH_PAGE |
| 2: |
| mov SRMMU_FAULT_STATUS, %g1 |
| retl |
| lda [%g1] ASI_M_MMUREGS, %g0 |
| |
| /* HyperSparc is IO cache coherent. */ |
| hypersparc_flush_page_for_dma: |
| retl |
| nop |
| |
| /* It was noted that at boot time a TLB flush all in a delay slot |
| * can deliver an illegal instruction to the processor if the timing |
| * is just right... |
| */ |
| hypersparc_flush_tlb_all: |
| mov 0x400, %g1 |
| sta %g0, [%g1] ASI_M_FLUSH_PROBE |
| retl |
| nop |
| |
| hypersparc_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 hypersparc_flush_tlb_mm_out |
| #endif |
| mov 0x300, %g2 |
| sta %o1, [%g1] ASI_M_MMUREGS |
| sta %g0, [%g2] ASI_M_FLUSH_PROBE |
| hypersparc_flush_tlb_mm_out: |
| retl |
| sta %g5, [%g1] ASI_M_MMUREGS |
| |
| hypersparc_flush_tlb_range: |
| ld [%o0 + VMA_VM_MM], %o0 |
| mov SRMMU_CTX_REG, %g1 |
| ld [%o0 + AOFF_mm_context], %o3 |
| lda [%g1] ASI_M_MMUREGS, %g5 |
| #ifndef CONFIG_SMP |
| cmp %o3, -1 |
| be hypersparc_flush_tlb_range_out |
| #endif |
| sethi %hi(~((1 << 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 |
| hypersparc_flush_tlb_range_out: |
| retl |
| sta %g5, [%g1] ASI_M_MMUREGS |
| |
| hypersparc_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 |
| #ifndef CONFIG_SMP |
| cmp %o3, -1 |
| be hypersparc_flush_tlb_page_out |
| #endif |
| lda [%g1] ASI_M_MMUREGS, %g5 |
| sta %o3, [%g1] ASI_M_MMUREGS |
| sta %g0, [%o1] ASI_M_FLUSH_PROBE |
| hypersparc_flush_tlb_page_out: |
| retl |
| sta %g5, [%g1] ASI_M_MMUREGS |
| |
| __INIT |
| |
| /* High speed page clear/copy. */ |
| hypersparc_bzero_1page: |
| /* NOTE: This routine has to be shorter than 40insns --jj */ |
| clr %g1 |
| mov 32, %g2 |
| mov 64, %g3 |
| mov 96, %g4 |
| mov 128, %g5 |
| mov 160, %g7 |
| mov 192, %o2 |
| mov 224, %o3 |
| mov 16, %o1 |
| 1: |
| stda %g0, [%o0 + %g0] ASI_M_BFILL |
| stda %g0, [%o0 + %g2] ASI_M_BFILL |
| stda %g0, [%o0 + %g3] ASI_M_BFILL |
| stda %g0, [%o0 + %g4] ASI_M_BFILL |
| stda %g0, [%o0 + %g5] ASI_M_BFILL |
| stda %g0, [%o0 + %g7] ASI_M_BFILL |
| stda %g0, [%o0 + %o2] ASI_M_BFILL |
| stda %g0, [%o0 + %o3] ASI_M_BFILL |
| subcc %o1, 1, %o1 |
| bne 1b |
| add %o0, 256, %o0 |
| |
| retl |
| nop |
| |
| hypersparc_copy_1page: |
| /* NOTE: This routine has to be shorter than 70insns --jj */ |
| sub %o1, %o0, %o2 ! difference |
| mov 16, %g1 |
| 1: |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| add %o0, 32, %o0 |
| sta %o0, [%o0 + %o2] ASI_M_BCOPY |
| subcc %g1, 1, %g1 |
| bne 1b |
| add %o0, 32, %o0 |
| |
| retl |
| nop |
| |
| .globl hypersparc_setup_blockops |
| hypersparc_setup_blockops: |
| sethi %hi(bzero_1page), %o0 |
| or %o0, %lo(bzero_1page), %o0 |
| sethi %hi(hypersparc_bzero_1page), %o1 |
| or %o1, %lo(hypersparc_bzero_1page), %o1 |
| sethi %hi(hypersparc_copy_1page), %o2 |
| or %o2, %lo(hypersparc_copy_1page), %o2 |
| ld [%o1], %o4 |
| 1: |
| add %o1, 4, %o1 |
| st %o4, [%o0] |
| add %o0, 4, %o0 |
| cmp %o1, %o2 |
| bne 1b |
| ld [%o1], %o4 |
| sethi %hi(__copy_1page), %o0 |
| or %o0, %lo(__copy_1page), %o0 |
| sethi %hi(hypersparc_setup_blockops), %o2 |
| or %o2, %lo(hypersparc_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_FLUSH_IWHOLE |
| retl |
| nop |
