summaryrefslogtreecommitdiff
path: root/src/arch/amd64/acpi.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/arch/amd64/acpi.c')
-rw-r--r--src/arch/amd64/acpi.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/src/arch/amd64/acpi.c b/src/arch/amd64/acpi.c
deleted file mode 100644
index a7f38b6..0000000
--- a/src/arch/amd64/acpi.c
+++ /dev/null
@@ -1,337 +0,0 @@
-#include <acpi.h>
-#include <lib.h>
-#include <memory.h>
-#include <stdint.h>
-#include <stddef.h>
-#include <string.h>
-#include <panic.h>
-
-#include "bindings.h"
-
-struct acpi_header {
- uint32_t signature;
- uint32_t length;
- uint8_t revision;
- uint8_t checksum;
- uint8_t oem_id[6];
- uint8_t oem_table_id[8];
- uint32_t oem_revision;
- uint32_t creator_id;
- uint32_t creator_revision;
-} __attribute__((packed));
-
-// root system descriptor pointer
-// ACPI 1.0
-struct rsdp {
- uint8_t signature[8];
- uint8_t checksum;
- uint8_t oemid[6];
- uint8_t revision;
- uint32_t rsdt_addr;
-} __attribute__((packed));
-
-// eXtended system descriptor pointer
-// ACPI 2.0
-struct xsdp {
- char signature[8];
- uint8_t checksum;
- char oemid[6];
- uint8_t revision;
- uint32_t rsdt_addr;
- uint32_t length;
- uint64_t xsdt_addr;
- uint8_t extendeid_checksum;
- uint8_t reserved[3];
-} __attribute__((packed));
-
-// root system descriptor table
-// ACPI 1.0
-struct rsdt {
- struct acpi_header h;
- uint32_t sdt_pointers[];
-} __attribute__((packed));
-
-// eXtended system descriptor table
-// ACPI 2.0
-struct xsdt {
- struct acpi_header h;
- uint64_t sdt_pointers[];
-} __attribute__((packed));
-
-
-// generic address structure
-struct gas {
- uint8_t address_space;
- uint8_t bit_width;
- uint8_t bit_offset;
- uint8_t access_size;
- uint64_t address;
-};
-
-// differentiated system description table
-struct dsdt {
- struct acpi_header h;
- char s5_addr[];
-} __attribute__((packed));
-
-struct apic {
- struct acpi_header h;
- // todo
-} __attribute__((packed));
-
-struct hept {
- struct acpi_header h;
- // todo
-} __attribute__((packed));
-
-struct waet {
- struct acpi_header h;
- // todo
-} __attribute__((packed));
-
-// fixed acpi description table
-struct fadt {
- struct acpi_header h;
- uint32_t firmware_ctrl;
- uint32_t dsdt;
-
- // field used in ACPI 1.0; no longer in use, for compatibility only
- uint8_t reserved;
-
- uint8_t preferred_power_management_profile;
- uint16_t sci_interrupt;
- uint32_t smi_command_port;
- uint8_t acpi_enable;
- uint8_t acpi_disable;
- uint8_t s4bios_req;
- uint8_t pstate_control;
- uint32_t pm1_a_event_block;
- uint32_t pm1_b_event_block;
- uint32_t pm1_a_control_block;
- uint32_t pm1_b_control_block;
- uint32_t pm2_control_block;
- uint32_t pm_timer_block;
- uint32_t gpe0_block;
- uint32_t gpe1_block;
- uint8_t pm1_event_length;
- uint8_t pm1_control_length;
- uint8_t pm2_control_length;
- uint8_t pm_timer_length;
- uint8_t gpe0_length;
- uint8_t gpe1_length;
- uint8_t gpe1_base;
- uint8_t cstate_control;
- uint16_t worst_c2_latency;
- uint16_t worst_c3_latency;
- uint16_t flush_size;
- uint16_t flush_stride;
- uint8_t duty_offset;
- uint8_t duty_width;
- uint8_t day_alarm;
- uint8_t month_alarm;
- uint8_t century;
-
- // reserved in ACPI 1.0; used since ACPI 2.0+
- uint16_t boot_architecture_flags;
-
- uint8_t reserved_2;
- uint32_t flags;
-
- // 12 byte structure; see below for details
- struct gas reset_reg;
-
- uint8_t reset_value;
- uint8_t reserved_3[3];
-
- // 64bit pointers - Available on ACPI 2.0+
- uint64_t x_firmware_control;
- uint64_t x_dsdt;
-
- struct gas x_pm1_a_event_block;
- struct gas x_pm1_b_event_block;
- struct gas x_pm1_a_control_block;
- struct gas x_pm1_b_control_block;
- struct gas x_pm2_control_block;
- struct gas x_pm_timer_block;
- struct gas x_gpe0_block;
- struct gas x_gpe1_block;
-} __attribute__((packed));
-
-struct acpi_state {
- union {
- struct xsdt *xsdt;
- struct rsdt *rsdt;
- } sdt;
- struct fadt *fadt;
- struct dsdt *dsdt;
- struct apic *apic;
- struct hept *hept;
- struct waet *waet;
- uint8_t version;
-
- uint16_t SLP_TYPa;
- uint16_t SLP_TYPb;
- uint16_t SLP_EN;
- uint16_t SCI_EN;
-};
-
-/* global state, idk a better way rn */
-static struct acpi_state state;
-
-static bool checksum(uint8_t *data, size_t len) {
- unsigned char sum = 0;
- for (size_t i = 0; i < len; i++)
- sum += data[i];
- return sum == 0;
-}
-
-static int read_s5_addr(struct dsdt *dsdt) {
- char *s5_addr = dsdt->s5_addr;
- int dsdt_len = dsdt->h.length - sizeof(struct acpi_header);
-
- while (0 < dsdt_len--) {
- if (memcmp(s5_addr, "_S5_", 4) == 0)
- break;
- s5_addr++;
- }
-
- if (dsdt_len > 0) {
- // check for valid AML structure
- if ( ( *(s5_addr-1) == 0x08 || ( *(s5_addr-2) == 0x08 && *(s5_addr-1) == '\\') ) && *(s5_addr+4) == 0x12 ) {
- s5_addr += 5;
- s5_addr += ((*s5_addr &0xC0)>>6) +2; // calculate PkgLength size
-
- if (*s5_addr == 0x0A)
- s5_addr++; // skip byteprefix
- state.SLP_TYPa = *(s5_addr)<<10;
- s5_addr++;
-
- if (*s5_addr == 0x0A)
- s5_addr++; // skip byteprefix
- state.SLP_TYPb = *(s5_addr)<<10;
-
- state.SLP_EN = 1<<13;
- state.SCI_EN = 1;
-
- } else {
- return -1;
- }
- } else {
- return -1;
- }
-
- return -1;
-}
-
-static void acpi_load_table(uint64_t addr);
-
-static void acpi_load_rsdt_tables(struct rsdt *rsdt) {
- int entries = (rsdt->h.length - sizeof(rsdt->h)) / 4;
- for (int i = 0; i < entries; i++) {
- uint32_t addr = rsdt->sdt_pointers[i];
- acpi_load_table(addr);
- }
-}
-
-static void acpi_load_xsdt_tables(struct xsdt *xsdt) {
- int entries = (xsdt->h.length - sizeof(xsdt->h)) / 8;
- for (int i = 0; i < entries; i++) {
- uint64_t addr = xsdt->sdt_pointers[i];
- acpi_load_table(addr);
- }
-}
-
-#define SIG_RSDT 0x54445352
-#define SIG_XSDT 0x54445358
-#define SIG_FACP 0x50434146
-#define SIG_DSDT 0x54445344
-#define SIG_APIC 0x43495041
-#define SIG_HEPT 0x54455048
-#define SIG_WAET 0x54454157
-
-static void acpi_handle_table(struct acpi_header *header) {
- switch (header->signature) {
- case SIG_RSDT:
- state.sdt.rsdt = (struct rsdt *) header;
- acpi_load_rsdt_tables(state.sdt.rsdt);
- break;
- case SIG_XSDT:
- state.sdt.xsdt = (struct xsdt *) header;
- acpi_load_xsdt_tables(state.sdt.xsdt);
- break;
- case SIG_FACP:
- state.fadt = (struct fadt *) header;
- acpi_load_table(state.fadt->dsdt);
- break;
- case SIG_DSDT:
- state.dsdt = (struct dsdt *) header;
- read_s5_addr(state.dsdt);
- break;
- case SIG_APIC:
- state.apic = (struct apic *) header;
- break;
- case SIG_HEPT:
- state.hept = (struct hept *) header;
- break;
- case SIG_WAET:
- state.waet = (struct waet *) header;
- break;
- default:
- break;
- }
-}
-
-static void acpi_load_table(uint64_t addr) {
- struct acpi_header *temp, *mapped;
- uint32_t length;
-
- temp = (struct acpi_header * ) (uintptr_t) addr;
- mapped = mmap(temp, sizeof(struct acpi_header));
- length = mapped->length;
- unmap(mapped);
- mapped = mmap(temp, length);
- if (!checksum((uint8_t *) mapped, mapped->length)) {
- unmap(mapped);
- return;
- }
- kprintf("%.*s: %#016lx\n", 4, (char*)&mapped->signature, (size_t)temp);
- acpi_handle_table(mapped);
-}
-
-int acpi_init(void *rootsdp) {
-
- memset(&state, 0, sizeof(struct acpi_state));
-
- struct rsdp *rsdp = (struct rsdp *) rootsdp;
-
- if (!checksum((uint8_t *)rsdp, sizeof(struct rsdp)))
- return -1;
-
- if (memcmp(rsdp->signature, "RSD PTR ", 8) != 0) {
- panic("invalid acpi rsdp signature: %.*s\n", 8, rsdp->signature);
- }
-
- if (rsdp->revision == 0) {
- state.version = 0;
- kprintf("ACPI 1.0\n");
- acpi_load_table(rsdp->rsdt_addr);
- } else if (rsdp->revision == 2) {
- state.version = 2;
- struct xsdp *xsdp = (struct xsdp *) rsdp;
- kprintf("ACPI 2.0\n");
- acpi_load_table(xsdp->xsdt_addr);
- } else {
- panic("invalid acpi rev: %d\n", rsdp->revision);
- }
-
- kprintf("\n");
-
- outb(state.fadt->smi_command_port,state.fadt->acpi_enable);
-
- return 0;
-}
-
-int acpi_shutdown(void) {
- outw((unsigned int) state.fadt->pm1_a_control_block, state.SLP_TYPb | state.SLP_EN);
- return -1;
-}
generated by cgit v1.2.3-freya (git 2.51.0) at 2025-09-22 18:03:26 +0000