summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/lib/feature-fixups.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/lib/feature-fixups.c')
-rw-r--r--arch/powerpc/lib/feature-fixups.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index 48e1ed89052d..4e43702b9813 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;
}