From 30d6e8f850d2fe26fffdeef0c38fc627ef8bab9a Mon Sep 17 00:00:00 2001
From: "Anna (navi) Figueiredo Gomes" <navi@vlhl.dev>
Date: Wed, 13 Dec 2023 13:24:48 +0100
Subject: initial commit

currently with:
booted via multiboot 1
protected mode to long mode boostrap code
vga used for outputting
gdt and idt set up
identity paging for the whole memory reported by multiboot
pic and ps/2 set up
acpi code exists but is broken
---
 include/acpi.h | 143 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 include/acpi.h

(limited to 'include/acpi.h')

diff --git a/include/acpi.h b/include/acpi.h
new file mode 100644
index 0000000..1c68ef4
--- /dev/null
+++ b/include/acpi.h
@@ -0,0 +1,143 @@
+#ifndef _ACPI_H_
+#define _ACPI_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+struct rsdp {
+ char signature[8];
+ uint8_t checksum;
+ char oemid[6];
+ uint8_t revision;
+ uint32_t rsdt_address;
+} __attribute__((packed));
+
+struct xsdp {
+ char signature[8];
+ uint8_t checksum;
+ char oemid[6];
+ uint8_t revision;
+ uint32_t rsdt_address; // deprecated since version 2.0
+
+ uint32_t length;
+ uint64_t xsdt_address;
+ uint8_t extended_checksum;
+ uint8_t reserved[3];
+} __attribute__((packed));
+
+struct acpi_sdt_header {
+	char signature[4];
+	uint32_t len;
+	uint8_t rev;
+	uint8_t checksum;
+	char oemid[6];
+	char oem_tableid[8];
+	uint32_t oem_revision;
+	uint32_t creatorid;
+	uint32_t creator_rev;
+} __attribute__((packed));
+
+struct rsdt {
+	struct acpi_sdt_header header;
+	uint32_t sdt_pointers[];
+} __attribute__((packed));
+
+struct xsdt {
+	struct acpi_sdt_header header;
+	uint64_t sdt_pointers[];
+} __attribute__((packed));
+
+struct generic_address {
+	uint8_t address_space;
+	uint8_t bid_width;
+	uint8_t bit_offset;
+	uint8_t access_size;
+	uint64_t address;
+} __attribute__((packed));
+
+struct fadt {
+	struct acpi_sdt_header header;
+	uint32_t firmware_ctrl;
+	uint32_t dsdt;
+
+	uint8_t reserved;
+
+	uint8_t prevered_power_management_profile;
+	uint16_t sci_interrupt;
+	uint32_t smi_command_port;
+	uint8_t acpi_enable;
+	uint8_t acpi_disable;
+	uint8_t s4_bios_req;
+	uint8_t pstate_control;
+
+	uint32_t pm1a_event_block;
+	uint32_t pm1b_event_block;
+
+	uint32_t pm1a_control_block;
+	uint32_t pm1b_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;
+
+	uint16_t boot_arch_flags;
+
+	uint8_t reserved_2;
+	uint32_t flags;
+
+	struct generic_address reset_reg;
+
+	uint8_t reset_valued;
+	uint8_t reserved_3[3];
+
+	uint64_t x_firmware_control;
+	uint64_t x_dsdt;
+
+	struct generic_address x_pm1a_event_block;
+	struct generic_address x_pm1b_event_block;
+	struct generic_address x_pm1a_control_block;
+	struct generic_address x_pm1b_control_block;
+	struct generic_address x_pm2_control_block;
+	struct generic_address x_pm_timer_block;
+	struct generic_address x_gpe0_block;
+	struct generic_address x_gpe1_block;
+} __attribute__((packed));
+
+struct xsdp *find_rsdp();
+struct fadt *find_facp(struct xsdt *root_sdt);
+void print_rsdp(const struct rsdp *rsdp);
+
+static inline struct xsdt *get_rsdt(struct xsdp *rsdp) {
+	if (rsdp == NULL || rsdp->revision == 0)
+		return NULL;
+	return (struct xsdt *) rsdp->xsdt_address;
+}
+
+#endif
-- 
cgit v1.2.3