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| author | Paul Mundt <lethal@linux-sh.org> | 2012-08-01 06:49:13 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-08-01 06:49:13 +0200 |
| commit | 91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e (patch) | |
| tree | c96ed92413044a28d17783e84a8824bfd2437af1 /arch/mips/cavium-octeon/octeon-memcpy.S | |
| parent | sh: modify the sh_dmae_slave_config for RSPI in setup-sh7757 (diff) | |
| parent | serial: sh-sci: fix compilation breakage, when DMA is enabled (diff) | |
| download | linux-91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e.tar.xz linux-91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e.zip | |
Merge branch 'sh/dmaengine' into sh-latest
Diffstat (limited to 'arch/mips/cavium-octeon/octeon-memcpy.S')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-memcpy.S | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/mips/cavium-octeon/octeon-memcpy.S b/arch/mips/cavium-octeon/octeon-memcpy.S index 88e0cddca205..db478dbb9c7b 100644 --- a/arch/mips/cavium-octeon/octeon-memcpy.S +++ b/arch/mips/cavium-octeon/octeon-memcpy.S @@ -164,6 +164,14 @@ .set noat /* + * t7 is used as a flag to note inatomic mode. + */ +LEAF(__copy_user_inatomic) + b __copy_user_common + li t7, 1 + END(__copy_user_inatomic) + +/* * A combined memcpy/__copy_user * __copy_user sets len to 0 for success; else to an upper bound of * the number of uncopied bytes. @@ -174,6 +182,8 @@ LEAF(memcpy) /* a0=dst a1=src a2=len */ move v0, dst /* return value */ __memcpy: FEXPORT(__copy_user) + li t7, 0 /* not inatomic */ +__copy_user_common: /* * Note: dst & src may be unaligned, len may be 0 * Temps @@ -412,7 +422,6 @@ l_exc_copy: * Assumes src < THREAD_BUADDR($28) */ LOAD t0, TI_TASK($28) - nop LOAD t0, THREAD_BUADDR(t0) 1: EXC( lb t1, 0(src), l_exc) @@ -422,10 +431,9 @@ EXC( lb t1, 0(src), l_exc) ADD dst, dst, 1 l_exc: LOAD t0, TI_TASK($28) - nop LOAD t0, THREAD_BUADDR(t0) # t0 is just past last good address - nop SUB len, AT, t0 # len number of uncopied bytes + bnez t7, 2f /* Skip the zeroing out part if inatomic */ /* * Here's where we rely on src and dst being incremented in tandem, * See (3) above. @@ -443,7 +451,7 @@ l_exc: ADD dst, dst, 1 bnez src, 1b SUB src, src, 1 - jr ra +2: jr ra nop |