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| author | Sam Ravnborg <sam@ravnborg.org> | 2008-12-03 12:10:25 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-04 18:17:19 +0100 |
| commit | 478b8fecda511942404ac232897a718cecd13e48 (patch) | |
| tree | e022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/NGpage.S | |
| parent | sparc: prepare lib/ for unification (diff) | |
| download | linux-478b8fecda511942404ac232897a718cecd13e48.tar.xz linux-478b8fecda511942404ac232897a718cecd13e48.zip | |
sparc,sparc64: unify lib/
o Renamed files in sparc64 to <name>_64.S when identical
to sparc32 files.
o iomap.c were equal for sparc32 and sparc64
o adjusted sparc/Makefile now we have only one lib/
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib/NGpage.S')
| -rw-r--r-- | arch/sparc/lib/NGpage.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/arch/sparc/lib/NGpage.S b/arch/sparc/lib/NGpage.S new file mode 100644 index 000000000000..428920de05ba --- /dev/null +++ b/arch/sparc/lib/NGpage.S @@ -0,0 +1,99 @@ +/* NGpage.S: Niagara optimize clear and copy page. + * + * Copyright (C) 2006 (davem@davemloft.net) + */ + +#include <asm/asi.h> +#include <asm/page.h> + + .text + .align 32 + + /* This is heavily simplified from the sun4u variants + * because Niagara does not have any D-cache aliasing issues + * and also we don't need to use the FPU in order to implement + * an optimal page copy/clear. + */ + +NGcopy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */ + prefetch [%o1 + 0x00], #one_read + mov 8, %g1 + mov 16, %g2 + mov 24, %g3 + set PAGE_SIZE, %g7 + +1: ldda [%o1 + %g0] ASI_BLK_INIT_QUAD_LDD_P, %o2 + ldda [%o1 + %g2] ASI_BLK_INIT_QUAD_LDD_P, %o4 + prefetch [%o1 + 0x40], #one_read + add %o1, 32, %o1 + stxa %o2, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P + stxa %o3, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P + ldda [%o1 + %g0] ASI_BLK_INIT_QUAD_LDD_P, %o2 + stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P + stxa %o5, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P + ldda [%o1 + %g2] ASI_BLK_INIT_QUAD_LDD_P, %o4 + add %o1, 32, %o1 + add %o0, 32, %o0 + stxa %o2, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P + stxa %o3, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P + stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P + stxa %o5, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P + subcc %g7, 64, %g7 + bne,pt %xcc, 1b + add %o0, 32, %o0 + membar #Sync + retl + nop + + .globl NGclear_page, NGclear_user_page +NGclear_page: /* %o0=dest */ +NGclear_user_page: /* %o0=dest, %o1=vaddr */ + mov 8, %g1 + mov 16, %g2 + mov 24, %g3 + set PAGE_SIZE, %g7 + +1: stxa %g0, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P + add %o0, 32, %o0 + stxa %g0, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P + stxa %g0, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P + subcc %g7, 64, %g7 + bne,pt %xcc, 1b + add %o0, 32, %o0 + membar #Sync + retl + nop + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define NG_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + sll %g1, 11, %g1; \ + srl %g1, 11 + 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + + .globl niagara_patch_pageops + .type niagara_patch_pageops,#function +niagara_patch_pageops: + NG_DO_PATCH(copy_user_page, NGcopy_user_page) + NG_DO_PATCH(_clear_page, NGclear_page) + NG_DO_PATCH(clear_user_page, NGclear_user_page) + retl + nop + .size niagara_patch_pageops,.-niagara_patch_pageops |