diff options
Diffstat (limited to 'arch/sparc64/lib/copy_in_user.S')
-rw-r--r-- | arch/sparc64/lib/copy_in_user.S | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/arch/sparc64/lib/copy_in_user.S b/arch/sparc64/lib/copy_in_user.S deleted file mode 100644 index 650af3f..0000000 --- a/arch/sparc64/lib/copy_in_user.S +++ /dev/null @@ -1,119 +0,0 @@ -/* copy_in_user.S: Copy from userspace to userspace. - * - * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) - */ - -#include <asm/asi.h> - -#define XCC xcc - -#define EX(x,y) \ -98: x,y; \ - .section .fixup; \ - .align 4; \ -99: retl; \ - mov 1, %o0; \ - .section __ex_table,"a";\ - .align 4; \ - .word 98b, 99b; \ - .text; \ - .align 4; - - .register %g2,#scratch - .register %g3,#scratch - - .text - .align 32 - - /* Don't try to get too fancy here, just nice and - * simple. This is predominantly used for well aligned - * small copies in the compat layer. It is also used - * to copy register windows around during thread cloning. - */ - - .globl ___copy_in_user - .type ___copy_in_user,#function -___copy_in_user: /* %o0=dst, %o1=src, %o2=len */ - /* Writing to %asi is _expensive_ so we hardcode it. - * Reading %asi to check for KERNEL_DS is comparatively - * cheap. - */ - rd %asi, %g1 - cmp %g1, ASI_AIUS - bne,pn %icc, memcpy_user_stub - nop - - cmp %o2, 0 - be,pn %XCC, 85f - or %o0, %o1, %o3 - cmp %o2, 16 - bleu,a,pn %XCC, 80f - or %o3, %o2, %o3 - - /* 16 < len <= 64 */ - andcc %o3, 0x7, %g0 - bne,pn %XCC, 90f - sub %o0, %o1, %o3 - - andn %o2, 0x7, %o4 - and %o2, 0x7, %o2 -1: subcc %o4, 0x8, %o4 - EX(ldxa [%o1] %asi, %o5) - EX(stxa %o5, [%o1 + %o3] ASI_AIUS) - bgu,pt %XCC, 1b - add %o1, 0x8, %o1 - andcc %o2, 0x4, %g0 - be,pt %XCC, 1f - nop - sub %o2, 0x4, %o2 - EX(lduwa [%o1] %asi, %o5) - EX(stwa %o5, [%o1 + %o3] ASI_AIUS) - add %o1, 0x4, %o1 -1: cmp %o2, 0 - be,pt %XCC, 85f - nop - ba,pt %xcc, 90f - nop - -80: /* 0 < len <= 16 */ - andcc %o3, 0x3, %g0 - bne,pn %XCC, 90f - sub %o0, %o1, %o3 - -82: - subcc %o2, 4, %o2 - EX(lduwa [%o1] %asi, %g1) - EX(stwa %g1, [%o1 + %o3] ASI_AIUS) - bgu,pt %XCC, 82b - add %o1, 4, %o1 - -85: retl - clr %o0 - - .align 32 -90: - subcc %o2, 1, %o2 - EX(lduba [%o1] %asi, %g1) - EX(stba %g1, [%o1 + %o3] ASI_AIUS) - bgu,pt %XCC, 90b - add %o1, 1, %o1 - retl - clr %o0 - - .size ___copy_in_user, .-___copy_in_user - - /* Act like copy_{to,in}_user(), ie. return zero instead - * of original destination pointer. This is invoked when - * copy_{to,in}_user() finds that %asi is kernel space. - */ - .globl memcpy_user_stub - .type memcpy_user_stub,#function -memcpy_user_stub: - save %sp, -192, %sp - mov %i0, %o0 - mov %i1, %o1 - call memcpy - mov %i2, %o2 - ret - restore %g0, %g0, %o0 - .size memcpy_user_stub, .-memcpy_user_stub |