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| author | Andres Salomon <dilinger@queued.net> | 2008-05-07 13:07:37 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-05-08 15:43:50 +0200 |
| commit | 547acec7ecc32b14c2740de3f32ce7d1b36a0f69 (patch) | |
| tree | c51565daaff629d6cdb1e8ddd5eb02158b59f6ec /arch/x86/kernel/geode_32.c | |
| parent | ac44cc96fbc8f44c056fa37573e8447eec512b10 (diff) | |
| download | blackbird-op-linux-547acec7ecc32b14c2740de3f32ce7d1b36a0f69.tar.gz blackbird-op-linux-547acec7ecc32b14c2740de3f32ce7d1b36a0f69.zip | |
x86: GEODE: cache results from geode_has_vsa2() and uninline
This moves geode_has_vsa2 into a .c file, caches the result we get from
the VSA virtual registers, and causes the function to no longer be inline.
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/geode_32.c')
| -rw-r--r-- | arch/x86/kernel/geode_32.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/kernel/geode_32.c b/arch/x86/kernel/geode_32.c index 9dad6ca6cd70..e8edd63ab000 100644 --- a/arch/x86/kernel/geode_32.c +++ b/arch/x86/kernel/geode_32.c @@ -161,6 +161,25 @@ void geode_gpio_setup_event(unsigned int gpio, int pair, int pme) } EXPORT_SYMBOL_GPL(geode_gpio_setup_event); +int geode_has_vsa2(void) +{ + static int has_vsa2 = -1; + + if (has_vsa2 == -1) { + /* + * The VSA has virtual registers that we can query for a + * signature. + */ + outw(VSA_VR_UNLOCK, VSA_VRC_INDEX); + outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX); + + has_vsa2 = (inw(VSA_VRC_DATA) == VSA_SIG); + } + + return has_vsa2; +} +EXPORT_SYMBOL_GPL(geode_has_vsa2); + static int __init geode_southbridge_init(void) { if (!is_geode()) |
