diff options
Diffstat (limited to 'arch/sparc64/kernel/unaligned.c')
| -rw-r--r-- | arch/sparc64/kernel/unaligned.c | 64 |
1 files changed, 57 insertions, 7 deletions
diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c index da9739f0d43..42718f6a7d3 100644 --- a/arch/sparc64/kernel/unaligned.c +++ b/arch/sparc64/kernel/unaligned.c @@ -184,13 +184,14 @@ extern void do_int_load(unsigned long *dest_reg, int size, unsigned long *saddr, int is_signed, int asi); extern void __do_int_store(unsigned long *dst_addr, int size, - unsigned long *src_val, int asi); + unsigned long src_val, int asi); static inline void do_int_store(int reg_num, int size, unsigned long *dst_addr, - struct pt_regs *regs, int asi) + struct pt_regs *regs, int asi, int orig_asi) { unsigned long zero = 0; - unsigned long *src_val = &zero; + unsigned long *src_val_p = &zero; + unsigned long src_val; if (size == 16) { size = 8; @@ -198,7 +199,25 @@ static inline void do_int_store(int reg_num, int size, unsigned long *dst_addr, (unsigned)fetch_reg(reg_num, regs) : 0)) << 32) | (unsigned)fetch_reg(reg_num + 1, regs); } else if (reg_num) { - src_val = fetch_reg_addr(reg_num, regs); + src_val_p = fetch_reg_addr(reg_num, regs); + } + src_val = *src_val_p; + if (unlikely(asi != orig_asi)) { + switch (size) { + case 2: + src_val = swab16(src_val); + break; + case 4: + src_val = swab32(src_val); + break; + case 8: + src_val = swab64(src_val); + break; + case 16: + default: + BUG(); + break; + }; } __do_int_store(dst_addr, size, src_val, asi); } @@ -276,6 +295,7 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u kernel_mna_trap_fault(); } else { unsigned long addr; + int orig_asi, asi; addr = compute_effective_address(regs, insn, ((insn >> 25) & 0x1f)); @@ -285,18 +305,48 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u regs->tpc, dirstrings[dir], addr, size, regs->u_regs[UREG_RETPC]); #endif + orig_asi = asi = decode_asi(insn, regs); + switch (asi) { + case ASI_NL: + case ASI_AIUPL: + case ASI_AIUSL: + case ASI_PL: + case ASI_SL: + case ASI_PNFL: + case ASI_SNFL: + asi &= ~0x08; + break; + }; switch (dir) { case load: do_int_load(fetch_reg_addr(((insn>>25)&0x1f), regs), size, (unsigned long *) addr, - decode_signedness(insn), - decode_asi(insn, regs)); + decode_signedness(insn), asi); + if (unlikely(asi != orig_asi)) { + unsigned long val_in = *(unsigned long *) addr; + switch (size) { + case 2: + val_in = swab16(val_in); + break; + case 4: + val_in = swab32(val_in); + break; + case 8: + val_in = swab64(val_in); + break; + case 16: + default: + BUG(); + break; + }; + *(unsigned long *) addr = val_in; + } break; case store: do_int_store(((insn>>25)&0x1f), size, (unsigned long *) addr, regs, - decode_asi(insn, regs)); + asi, orig_asi); break; default: |