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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-09 09:05:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-09 09:05:33 -0700 |
| commit | 89c5a9461d02613c829cf9beffdc3d3c6c3df401 (patch) | |
| tree | e0c6ada024a32da3cd6bb4b4f0469d66e5df45c9 /arch/arc/kernel/unaligned.c | |
| parent | 833ae40b517a99e05fc4aea399e71f633f3348d2 (diff) | |
| parent | 07b9b65147d1d7cc03b9ff1e1f3b1c163ba4d067 (diff) | |
Merge tag 'arc-v3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC changes from Vineet Gupta:
- ARC MM changes:
- preparation for MMUv4 (accomodate new PTE bits, new cmds)
- Rework the ASID allocation algorithm to remove asid-mm reverse map
- Boilerplate code consolidation in Exception Handlers
- Disable FRAME_POINTER for ARC
- Unaligned Access Emulation for Big-Endian from Noam
- Bunch of fixes (udelay, missing accessors) from Mischa
* tag 'arc-v3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: fix new Section mismatches in build (post __cpuinit cleanup)
Kconfig.debug: Add FRAME_POINTER anti-dependency for ARC
ARC: Fix __udelay calculation
ARC: remove console_verbose() from setup_arch()
ARC: Add read*_relaxed to asm/io.h
ARC: Handle un-aligned user space access in BE.
ARC: [ASID] Track ASID allocation cycles/generations
ARC: [ASID] activate_mm() == switch_mm()
ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID
ARC: [ASID] Refactor the TLB paranoid debug code
ARC: [ASID] Remove legacy/unused debug code
ARC: No need to flush the TLB in early boot
ARC: MMUv4 preps/3 - Abstract out TLB Insert/Delete
ARC: MMUv4 preps/2 - Reshuffle PTE bits
ARC: MMUv4 preps/1 - Fold PTE K/U access flags
ARC: Code cosmetics (Nothing semantical)
ARC: Entry Handler tweaks: Optimize away redundant IRQ_DISABLE_SAVE
ARC: Exception Handlers Code consolidation
ARC: Add some .gitignore entries
Diffstat (limited to 'arch/arc/kernel/unaligned.c')
| -rw-r--r-- | arch/arc/kernel/unaligned.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c index c0f832f595d3..28d170060747 100644 --- a/arch/arc/kernel/unaligned.c +++ b/arch/arc/kernel/unaligned.c @@ -16,6 +16,16 @@ #include <linux/uaccess.h> #include <asm/disasm.h> +#ifdef CONFIG_CPU_BIG_ENDIAN +#define BE 1 +#define FIRST_BYTE_16 "swap %1, %1\n swape %1, %1\n" +#define FIRST_BYTE_32 "swape %1, %1\n" +#else +#define BE 0 +#define FIRST_BYTE_16 +#define FIRST_BYTE_32 +#endif + #define __get8_unaligned_check(val, addr, err) \ __asm__( \ "1: ldb.ab %1, [%2, 1]\n" \ @@ -36,9 +46,9 @@ do { \ unsigned int err = 0, v, a = addr; \ __get8_unaligned_check(v, a, err); \ - val = v ; \ + val = v << ((BE) ? 8 : 0); \ __get8_unaligned_check(v, a, err); \ - val |= v << 8; \ + val |= v << ((BE) ? 0 : 8); \ if (err) \ goto fault; \ } while (0) @@ -47,13 +57,13 @@ do { \ unsigned int err = 0, v, a = addr; \ __get8_unaligned_check(v, a, err); \ - val = v << 0; \ + val = v << ((BE) ? 24 : 0); \ __get8_unaligned_check(v, a, err); \ - val |= v << 8; \ + val |= v << ((BE) ? 16 : 8); \ __get8_unaligned_check(v, a, err); \ - val |= v << 16; \ + val |= v << ((BE) ? 8 : 16); \ __get8_unaligned_check(v, a, err); \ - val |= v << 24; \ + val |= v << ((BE) ? 0 : 24); \ if (err) \ goto fault; \ } while (0) @@ -63,6 +73,7 @@ unsigned int err = 0, v = val, a = addr;\ \ __asm__( \ + FIRST_BYTE_16 \ "1: stb.ab %1, [%2, 1]\n" \ " lsr %1, %1, 8\n" \ "2: stb %1, [%2]\n" \ @@ -87,8 +98,9 @@ #define put32_unaligned_check(val, addr) \ do { \ unsigned int err = 0, v = val, a = addr;\ - __asm__( \ \ + __asm__( \ + FIRST_BYTE_32 \ "1: stb.ab %1, [%2, 1]\n" \ " lsr %1, %1, 8\n" \ "2: stb.ab %1, [%2, 1]\n" \ |