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x86_64: init local apic on boot, or legacy pic/pit as fallback

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max 🍓
2023-03-19 20:36:36 +00:00
parent 7e26050bde
commit 8e9127cd6a
13 changed files with 274 additions and 72 deletions
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11
arch/x86_64/acpi/rsdp.c
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@@ -9,7 +9,7 @@ static struct acpi_rsdp_10 *search_for_rsdp(void)
{
uint64_t *start = vm_phys_to_virt(0x80000);
uint64_t *end = vm_phys_to_virt(0xFFFFF);
for (uint64_t *i = start; i < end; i++) {
if (*i == ACPI_SIG_RSDP) {
return (struct acpi_rsdp_10 *)i;
@@ -24,7 +24,6 @@ static int init_rsdt(void)
struct acpi_rsdp_10 *x = search_for_rsdp();
if (!x) {
printk("acpi: not available");
return -1;
}
@@ -33,25 +32,23 @@ static int init_rsdt(void)
for (unsigned int i = 0; i < sizeof *x; i++) {
chksum += b[i];
}
if (chksum & 0xFF) {
printk("acpi: not available");
return -1;
}
if (x->r_revision == 2) {
chksum = 0;
for (unsigned int i = sizeof *x; i < sizeof(struct acpi_rsdp_20); i++) {
chksum += b[i];
}
if (chksum & 0xFF) {
printk("acpi: not available");
return -1;
}
}
memcpy(&rsdp.rsdp_20, x, sizeof rsdp.rsdp_20);
return 0;
}