diff options
Diffstat (limited to 'arch/powerpc/lib/feature-fixups.c')
| -rw-r--r-- | arch/powerpc/lib/feature-fixups.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c index 48e1ed89052..4e43702b981 100644 --- a/arch/powerpc/lib/feature-fixups.c +++ b/arch/powerpc/lib/feature-fixups.c @@ -110,6 +110,22 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end) } } +void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end) +{ + unsigned int *start, *end, *dest; + + if (!(value & CPU_FTR_LWSYNC)) + return ; + + start = fixup_start; + end = fixup_end; + + for (; start < end; start++) { + dest = (void *)start + *start; + patch_instruction(dest, PPC_LWSYNC_INSTR); + } +} + #ifdef CONFIG_FTR_FIXUP_SELFTEST #define check(x) \ @@ -295,6 +311,25 @@ static void test_fw_macros(void) #endif } +static void test_lwsync_macros(void) +{ + extern void lwsync_fixup_test; + extern void end_lwsync_fixup_test; + extern void lwsync_fixup_test_expected_LWSYNC; + extern void lwsync_fixup_test_expected_SYNC; + unsigned long size = &end_lwsync_fixup_test - + &lwsync_fixup_test; + + /* The fixups have already been done for us during boot */ + if (cur_cpu_spec->cpu_features & CPU_FTR_LWSYNC) { + check(memcmp(&lwsync_fixup_test, + &lwsync_fixup_test_expected_LWSYNC, size) == 0); + } else { + check(memcmp(&lwsync_fixup_test, + &lwsync_fixup_test_expected_SYNC, size) == 0); + } +} + static int __init test_feature_fixups(void) { printk(KERN_DEBUG "Running feature fixup self-tests ...\n"); @@ -307,6 +342,7 @@ static int __init test_feature_fixups(void) test_alternative_case_with_external_branch(); test_cpu_macros(); test_fw_macros(); + test_lwsync_macros(); return 0; } |