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microblaze: Fix unaligned exception for little endian platform

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Half word unaligned accesses need to be fixed.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek
2010-12-29 14:34:46 +01:00
parent a3c26959cc
commit e3288f3101
1 changed files with 9 additions and 0 deletions
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9
arch/microblaze/kernel/hw_exception_handler.S
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@@ -945,11 +945,20 @@ store3: sbi r3, r4, 2;
store4: sbi r3, r4, 3; /* Delay slot */ store4: sbi r3, r4, 3; /* Delay slot */
ex_shw_vm: ex_shw_vm:
/* Store the lower half-word, byte-by-byte into destination address */ /* Store the lower half-word, byte-by-byte into destination address */
#ifdef __MICROBLAZEEL__
lbui r3, r5, 0;
store5: sbi r3, r4, 0;
lbui r3, r5, 1;
brid ret_from_exc;
store6: sbi r3, r4, 1; /* Delay slot */
#else
lbui r3, r5, 2; lbui r3, r5, 2;
store5: sbi r3, r4, 0; store5: sbi r3, r4, 0;
lbui r3, r5, 3; lbui r3, r5, 3;
brid ret_from_exc; brid ret_from_exc;
store6: sbi r3, r4, 1; /* Delay slot */ store6: sbi r3, r4, 1; /* Delay slot */
#endif
ex_sw_end_vm: /* Exception handling of store word, ends. */ ex_sw_end_vm: /* Exception handling of store word, ends. */
/* We have to prevent cases that get/put_user macros get unaligned pointer /* We have to prevent cases that get/put_user macros get unaligned pointer