1 files changed, 133 insertions, 0 deletions

diff --git a/arch/sparc/mm/tsunami.S b/arch/sparc/mm/tsunami.S
new file mode 100644
index 000000000000..8acd1787fde2
--- /dev/null
+++ b/arch/sparc/mm/tsunami.S
@@ -0,0 +1,133 @@
+/* $Id: tsunami.S,v 1.7 2001/12/21 04:56:15 davem Exp $
+ * tsunami.S: High speed MicroSparc-I mmu/cache operations.
+ *
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/config.h>
+#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 + 0x0], %o0        /* XXX vma->vm_mm, GROSS XXX */
+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 + 0x00], %o0       /* XXX vma->vm_mm GROSS XXX */
+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 + 0x00], %o0       /* XXX vma->vm_mm GROSS XXX */
+        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];
+
+        .globl  tsunami_copy_1page
+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