diff options
| -rw-r--r-- | arch/sparc64/kernel/head.S | 2 | ||||
| -rw-r--r-- | arch/sparc64/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/sparc64/lib/NGbzero.S | 162 |
3 files changed, 165 insertions, 1 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S index 3222c8205b5..8c6c4694be9 100644 --- a/arch/sparc64/kernel/head.S +++ b/arch/sparc64/kernel/head.S @@ -420,6 +420,8 @@ niagara_tlb_fixup: /* Patch copy/clear ops. */ call niagara_patch_copyops nop + call niagara_patch_bzero + nop call niagara_patch_pageops nop diff --git a/arch/sparc64/lib/Makefile b/arch/sparc64/lib/Makefile index 3d0e9a24d7a..8812ded19f0 100644 --- a/arch/sparc64/lib/Makefile +++ b/arch/sparc64/lib/Makefile @@ -12,7 +12,7 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \ U1memcpy.o U1copy_from_user.o U1copy_to_user.o \ U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \ NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \ - NGpage.o \ + NGpage.o NGbzero.o \ copy_in_user.o user_fixup.o memmove.o \ mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o diff --git a/arch/sparc64/lib/NGbzero.S b/arch/sparc64/lib/NGbzero.S new file mode 100644 index 00000000000..fef584f745d --- /dev/null +++ b/arch/sparc64/lib/NGbzero.S @@ -0,0 +1,162 @@ +/* NGbzero.S: Niagara optimized memset/clear_user. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ +#include <asm/asi.h> + +#define EX_ST(x,y) \ +98: x,y; \ + .section .fixup; \ + .align 4; \ +99: retl; \ + mov %o1, %o0; \ + .section __ex_table; \ + .align 4; \ + .word 98b, 99b; \ + .text; \ + .align 4; + + .text + + .globl NGmemset + .type NGmemset, #function +NGmemset: /* %o0=buf, %o1=pat, %o2=len */ + and %o1, 0xff, %o3 + mov %o2, %o1 + sllx %o3, 8, %g1 + or %g1, %o3, %o2 + sllx %o2, 16, %g1 + or %g1, %o2, %o2 + sllx %o2, 32, %g1 + ba,pt %xcc, 1f + or %g1, %o2, %o2 + + .globl NGbzero + .type NGbzero, #function +NGbzero: + clr %o2 +1: brz,pn %o1, NGbzero_return + mov %o0, %o3 + + /* %o5: saved %asi, restored at NGbzero_done + * %g7: store-init %asi to use + * %o4: non-store-init %asi to use + */ + rd %asi, %o5 + mov ASI_BLK_INIT_QUAD_LDD_P, %g7 + mov ASI_P, %o4 + wr %o4, 0x0, %asi + +NGbzero_from_clear_user: + cmp %o1, 15 + bl,pn %icc, NGbzero_tiny + andcc %o0, 0x7, %g1 + be,pt %xcc, 2f + mov 8, %g2 + sub %g2, %g1, %g1 + sub %o1, %g1, %o1 +1: EX_ST(stba %o2, [%o0 + 0x00] %asi) + subcc %g1, 1, %g1 + bne,pt %xcc, 1b + add %o0, 1, %o0 +2: cmp %o1, 128 + bl,pn %icc, NGbzero_medium + andcc %o0, (64 - 1), %g1 + be,pt %xcc, NGbzero_pre_loop + mov 64, %g2 + sub %g2, %g1, %g1 + sub %o1, %g1, %o1 +1: EX_ST(stxa %o2, [%o0 + 0x00] %asi) + subcc %g1, 8, %g1 + bne,pt %xcc, 1b + add %o0, 8, %o0 + +NGbzero_pre_loop: + wr %g7, 0x0, %asi + andn %o1, (64 - 1), %g1 + sub %o1, %g1, %o1 +NGbzero_loop: + EX_ST(stxa %o2, [%o0 + 0x00] %asi) + EX_ST(stxa %o2, [%o0 + 0x08] %asi) + EX_ST(stxa %o2, [%o0 + 0x10] %asi) + EX_ST(stxa %o2, [%o0 + 0x18] %asi) + EX_ST(stxa %o2, [%o0 + 0x20] %asi) + EX_ST(stxa %o2, [%o0 + 0x28] %asi) + EX_ST(stxa %o2, [%o0 + 0x30] %asi) + EX_ST(stxa %o2, [%o0 + 0x38] %asi) + subcc %g1, 64, %g1 + bne,pt %xcc, NGbzero_loop + add %o0, 64, %o0 + + wr %o4, 0x0, %asi + brz,pn %o1, NGbzero_done +NGbzero_medium: + andncc %o1, 0x7, %g1 + be,pn %xcc, 2f + sub %o1, %g1, %o1 +1: EX_ST(stxa %o2, [%o0 + 0x00] %asi) + subcc %g1, 8, %g1 + bne,pt %xcc, 1b + add %o0, 8, %o0 +2: brz,pt %o1, NGbzero_done + nop + +NGbzero_tiny: +1: EX_ST(stba %o2, [%o0 + 0x00] %asi) + subcc %o1, 1, %o1 + bne,pt %icc, 1b + add %o0, 1, %o0 + + /* fallthrough */ + +NGbzero_done: + wr %o5, 0x0, %asi + +NGbzero_return: + retl + mov %o3, %o0 + .size NGbzero, .-NGbzero + .size NGmemset, .-NGmemset + + .globl NGclear_user + .type NGclear_user, #function +NGclear_user: /* %o0=buf, %o1=len */ + rd %asi, %o5 + brz,pn %o1, NGbzero_done + clr %o3 + cmp %o5, ASI_AIUS + bne,pn %icc, NGbzero + clr %o2 + mov ASI_BLK_INIT_QUAD_LDD_AIUS, %g7 + ba,pt %xcc, NGbzero_from_clear_user + mov ASI_AIUS, %o4 + .size NGclear_user, .-NGclear_user + +#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_bzero + .type niagara_patch_bzero,#function +niagara_patch_bzero: + NG_DO_PATCH(memset, NGmemset) + NG_DO_PATCH(__bzero, NGbzero) + NG_DO_PATCH(__clear_user, NGclear_user) + retl + nop + .size niagara_patch_bzero,.-niagara_patch_bzero |