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Integrate uACPI & remove own ACPI parsing code

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This commit adds uACPI as a submodule and removes all handwritten table
parsing code as well as struct definitions, since they now work via
uACPI. There's also now an ability to shut down by using the power
button.
This commit is contained in:
8infy
2024-09-01 19:51:39 +03:00
parent 476d4bad74
commit db55f99e23
14 changed files with 758 additions and 266 deletions
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kernel-src/arch/x86-64/acpi.c
+3 -77
View File
@@ -1,86 +1,12 @@
#include <arch/acpi.h>
#include <limine.h>
#include <logging.h>
#include <kernel/alloc.h>
#include <kernel/vmm.h>
#include <kernel/pmm.h>
#include <string.h>
static size_t headercount;
static sdtheader_t **headers;
#include <stdint.h>
static volatile struct limine_rsdp_request rsdpreq = {
.id = LIMINE_RSDP_REQUEST,
.revision = 0
};
bool arch_acpi_checksumok(void *table) {
sdtheader_t *header = table;
uint8_t *ptr = table;
uint8_t sum = 0;
for (int i = 0; i < header->length; ++i)
sum += *ptr++;
return sum == 0;
}
void *arch_acpi_findtable(char *sig, int n) {
for (size_t i = 0; i < headercount; ++i) {
if (headers[i] == NULL)
continue;
if (strncmp(sig, headers[i]->sig, 4) == 0) {
if (n-- == 0)
return headers[i];
}
}
return NULL;
}
static void *map_table(void *physical) {
// TODO map according to header length entry
uintmax_t pageoffset = (uintptr_t)physical % PAGE_SIZE;
void *virt = vmm_map(NULL, PAGE_SIZE * 16, VMM_FLAGS_PHYSICAL, ARCH_MMU_FLAGS_READ | ARCH_MMU_FLAGS_NOEXEC, physical);
__assert(virt);
return (void *)((uintptr_t)virt + pageoffset);
}
void arch_acpi_init() {
// FIXME search if no response
__assert(rsdpreq.response);
rsdp_t *rsdp = map_table(FROM_HHDM(rsdpreq.response->address));
if (rsdp->revision == 0) {
printf("\e[93macpi: version 1.0 -- Using RSDT instead of XSDT.\e[0m\n");
rsdt_t *rsdt = map_table((void *)(uint64_t)rsdp->rsdt);
__assert(arch_acpi_checksumok(rsdt));
headercount = (rsdt->header.length - sizeof(sdtheader_t)) / sizeof(uint32_t);
headers = alloc(sizeof(sdtheader_t *) * headercount);
__assert(headers);
// TODO map according to the header length entry
for (size_t i = 0; i < headercount; ++i) {
// map it
void *addr = map_table((void *)(uint64_t)rsdt->tables[i]);
if (arch_acpi_checksumok(addr))
headers[i] = addr;
}
} else {
xsdt_t *xsdt = map_table((void *)rsdp->xsdt);
__assert(arch_acpi_checksumok(xsdt));
headercount = (xsdt->header.length - sizeof(sdtheader_t)) / sizeof(uint64_t);
headers = alloc(sizeof(sdtheader_t *) * headercount);
__assert(headers);
for (size_t i = 0; i < headercount; ++i) {
// map it
void *addr = map_table((void *)xsdt->tables[i]);
if (arch_acpi_checksumok(addr))
headers[i] = addr;
}
}
printf("ACPI: %lu tables found\n", headercount);
uintptr_t arch_get_rsdp(void) {
return (uintptr_t)FROM_HHDM(rsdpreq.response->address);
}