1 files changed, 57 insertions, 7 deletions

diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index da9739f0d437..42718f6a7d36 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: