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authorJack Steiner <steiner@sgi.com>2008-03-28 14:12:06 -0500
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:41:33 +0200
commitae261868658773538ddda829c50224e5851c2342 (patch)
treec6176e3c2bffae7307f32900a723e49efb2d6246 /arch/x86/kernel/genapic_64.c
parent05f2d12c3563dea8c81b301f9f3cf7919af23b13 (diff)
x86: add functions to determine if platform is a UV platform
Add functions that can be used to determine if an x86_64 system is a SGI "UV" system. UV systems come in 3 types and are identified by the OEM ID in the MADT. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/genapic_64.c')
-rw-r--r--arch/x86/kernel/genapic_64.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/kernel/genapic_64.c b/arch/x86/kernel/genapic_64.c
index 4ae7b644026..c873f60c74a 100644
--- a/arch/x86/kernel/genapic_64.c
+++ b/arch/x86/kernel/genapic_64.c
@@ -33,6 +33,8 @@ EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
struct genapic __read_mostly *genapic = &apic_flat;
+static enum uv_system_type uv_system_type;
+
/*
* Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
*/
@@ -64,3 +66,26 @@ void send_IPI_self(int vector)
{
__send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
}
+
+int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ if (!strcmp(oem_id, "SGI")) {
+ if (!strcmp(oem_table_id, "UVL"))
+ uv_system_type = UV_LEGACY_APIC;
+ else if (!strcmp(oem_table_id, "UVX"))
+ uv_system_type = UV_X2APIC;
+ else if (!strcmp(oem_table_id, "UVH"))
+ uv_system_type = UV_NON_UNIQUE_APIC;
+ }
+ return 0;
+}
+
+enum uv_system_type get_uv_system_type(void)
+{
+ return uv_system_type;
+}
+
+int is_uv_system(void)
+{
+ return uv_system_type != UV_NONE;
+}