aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorJack Steiner <steiner@sgi.com>2008-03-28 14:12:09 -0500
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:41:33 +0200
commitac049c1db72963e19b29b63c42ab8759384eef20 (patch)
tree00b04e515ca03323daa1c0f7ba3ccae185f2c6c5 /arch
parenta65d1d644c2b65bfb99e766e7160d764b8b2bfa4 (diff)
x86: parsing for ACPI "SAPIC" table
Add kernel support for new ACPI "sapic" tables that contain 16-bit APICIDs. This patch simply adds parsing of an optional SAPIC table if present. Otherwise, the traditional local APIC table is used. Note: the SAPIC table is not a new ACPI table - it exists on other architectures but is not currently recognized by x86_64. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/acpi/boot.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 05878ac934d..b33ebf6ea4f 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -265,6 +265,24 @@ acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
}
static int __init
+acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
+{
+ struct acpi_madt_local_sapic *processor = NULL;
+
+ processor = (struct acpi_madt_local_sapic *)header;
+
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ mp_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
+ processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
+
+ return 0;
+}
+
+static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
const unsigned long end)
{
@@ -757,8 +775,12 @@ static int __init acpi_parse_madt_lapic_entries(void)
mp_register_lapic_address(acpi_lapic_addr);
- count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
- MAX_APICS);
+ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
+ acpi_parse_sapic, MAX_APICS);
+
+ if (!count)
+ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
+ acpi_parse_lapic, MAX_APICS);
if (!count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
/* TBD: Cleanup to allow fallback to MPS */