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| author | David S. Miller <davem@davemloft.net> | 2010-09-17 17:09:25 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2010-09-22 22:35:09 +0200 |
| commit | dff9d3c215251022dd8bb3823c9f75edb4b63fe9 (patch) | |
| tree | 41939ab8a0530d79ea8daf212e2bfca37da05ea0 /arch/sparc/kernel/jump_label.c | |
| parent | jump label: x86 support (diff) | |
| download | linux-dff9d3c215251022dd8bb3823c9f75edb4b63fe9.tar.xz linux-dff9d3c215251022dd8bb3823c9f75edb4b63fe9.zip | |
jump label: Add sparc64 support
Add jump label support for sparc64.
Signed-off-by: David S. Miller <davem@davemloft.net>
LKML-Reference: <3b5b071fcdb2afb7f67cacecfa78b14c740278a7.1284733808.git.jbaron@redhat.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
[ cleaned up some formatting ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'arch/sparc/kernel/jump_label.c')
| -rw-r--r-- | arch/sparc/kernel/jump_label.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/sparc/kernel/jump_label.c b/arch/sparc/kernel/jump_label.c new file mode 100644 index 000000000000..ea2dafc93d78 --- /dev/null +++ b/arch/sparc/kernel/jump_label.c @@ -0,0 +1,47 @@ +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/cpu.h> + +#include <linux/jump_label.h> +#include <linux/memory.h> + +#ifdef HAVE_JUMP_LABEL + +void arch_jump_label_transform(struct jump_entry *entry, + enum jump_label_type type) +{ + u32 val; + u32 *insn = (u32 *) (unsigned long) entry->code; + + if (type == JUMP_LABEL_ENABLE) { + s32 off = (s32)entry->target - (s32)entry->code; + +#ifdef CONFIG_SPARC64 + /* ba,pt %xcc, . + (off << 2) */ + val = 0x10680000 | ((u32) off >> 2); +#else + /* ba . + (off << 2) */ + val = 0x10800000 | ((u32) off >> 2); +#endif + } else { + val = 0x01000000; + } + + get_online_cpus(); + mutex_lock(&text_mutex); + *insn = val; + flushi(insn); + mutex_unlock(&text_mutex); + put_online_cpus(); +} + +void arch_jump_label_text_poke_early(jump_label_t addr) +{ + u32 *insn_p = (u32 *) (unsigned long) addr; + + *insn_p = 0x01000000; + flushi(insn_p); +} + +#endif |