kernel/amd64: acpi: Fetch LAPIC base separate

This commit creates a acpi_get_lapic_base() so we don't have to
parse the MADT each time we want the Local APIC base.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 8 insertions, 5 deletions

diff --git a/sys/firmware/acpi/acpi_madt.c b/sys/firmware/acpi/acpi_madt.c
index 5f5d8d4..055ebd2 100644
--- a/sys/firmware/acpi/acpi_madt.c
+++ b/sys/firmware/acpi/acpi_madt.c
@@ -46,6 +46,14 @@ __KERNEL_META("$Hyra$: acpi_madt.c, Ian Marco Moffett, "
 
 static struct acpi_madt *madt = NULL;
 
+void *
+acpi_get_lapic_base(void)
+{
+    if (madt == NULL)
+        return NULL;
+    return (void *)(uint64_t)madt->lapic_addr;
+}
+
 static void
 do_parse(struct cpu_info *ci)
 {
@@ -53,7 +61,6 @@ do_parse(struct cpu_info *ci)
     uint8_t *end = NULL;
 
     void *ioapic_mmio_base = NULL;
-    void *lapic_mmio_base = NULL;
 
     struct apic_header *hdr = NULL;
     struct ioapic *ioapic = NULL;
@@ -61,10 +68,6 @@ do_parse(struct cpu_info *ci)
     cur = (uint8_t *)(madt + 1);
     end = (uint8_t *)madt + madt->hdr.length;
 
-    /* Init the Local APIC */
-    lapic_mmio_base = (void *)(uintptr_t)madt->lapic_addr;
-    ci->lapic_base = lapic_mmio_base;
-
     /* Parse the rest of the MADT */
     while (cur < end) {
         hdr = (void *)cur;