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feat: added basic ACPI support using LAI

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This commit is contained in:
Rick Rongen
2021-08-30 19:56:36 +02:00
parent 462dd90890
commit e37222c346
17 changed files with 729 additions and 44 deletions
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18
kernel/cpu/pic.c
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@@ -1,6 +1,7 @@
//
// Created by rick on 22-08-21.
//
#include <stdbool.h>
#include <myke/cpu/pic.h>
#include <myke/drivers/ports.h>
@@ -17,15 +18,17 @@
#define ICW4_BUF_MASTER 0x0C /* Buffered mode/master */
#define ICW4_SFNM 0x10 /* Special fully nested (not) */
void pic_init() {
#define PIC_END_OF_INTERRUPT 0x20
void pic_init(uint8_t isr_offset) {
// init both master and slave pic's
port_byte_out(PORT_PIC_MASTER_COMMAND, ICW1_INIT | ICW1_ICW4);
port_byte_out(PORT_PIC_SLAVE_COMMAND, ICW1_INIT | ICW1_ICW4);
// master with ICW4 offset 20, Slave on IRQ2, 8086 mode,
// master with ICW4 offset isr_offset, Slave on IRQ2, 8086 mode,
// ICW2
port_byte_out(PORT_PIC_MASTER_DATA, 0x20); // offset master
port_byte_out(PORT_PIC_SLAVE_DATA, 0x28); // offset slave
port_byte_out(PORT_PIC_MASTER_DATA, isr_offset); // offset master
port_byte_out(PORT_PIC_SLAVE_DATA, isr_offset + 8); // offset slave
// ICW3
port_byte_out(PORT_PIC_MASTER_DATA, 0x04); // slave PIC at IRQ2
port_byte_out(PORT_PIC_SLAVE_DATA, 0x02); // cascade identity
@@ -39,5 +42,10 @@ void pic_init() {
void pic_set_mask(uint16_t mask) {
port_byte_out(PORT_PIC_MASTER_DATA, mask & 0xFF);
port_byte_out(PORT_PIC_SLAVE_DATA, mask << 8);
port_byte_out(PORT_PIC_SLAVE_DATA, mask >> 8);
}
void pic_eoi(bool slave) {
if (slave) port_byte_out(PORT_PIC_SLAVE_COMMAND, PIC_END_OF_INTERRUPT); /* slave */
port_byte_out(PORT_PIC_MASTER_COMMAND, PIC_END_OF_INTERRUPT); /* master */
}