diff options
Diffstat (limited to 'arch/sparc/mm/tsunami.S')
| -rw-r--r-- | arch/sparc/mm/tsunami.S | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/arch/sparc/mm/tsunami.S b/arch/sparc/mm/tsunami.S new file mode 100644 index 000000000..62b742df6 --- /dev/null +++ b/arch/sparc/mm/tsunami.S @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * tsunami.S: High speed MicroSparc-I mmu/cache operations. + * + * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + */ + +#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 |