diff options
| author | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-03 03:39:47 -0400 |
|---|---|---|
| committer | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-03 03:39:47 -0400 |
| commit | 2d59766eb330b9d15a9bcbcd7e1695809fc099c5 (patch) | |
| tree | b5abb4d0c0c488cbb44c2c0a54d59b44fe1fc462 /kernel/arch/i386/pic.cpp | |
| parent | 2461cd921d45e3d75245568bc59831c1f0a43331 (diff) | |
renamed i386 to x86
Diffstat (limited to 'kernel/arch/i386/pic.cpp')
| -rw-r--r-- | kernel/arch/i386/pic.cpp | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/kernel/arch/i386/pic.cpp b/kernel/arch/i386/pic.cpp deleted file mode 100644 index 78cbcf8..0000000 --- a/kernel/arch/i386/pic.cpp +++ /dev/null @@ -1,97 +0,0 @@ -#include <io.h>
-#include <arch/i386/pic.h>
-#include <stdint.h>
-#include <arch/i386/pic.h>
-
-#define PIC1 0x20
-#define PIC2 0xA0
-#define PIC1_CMD PIC1
-#define PIC1_DATA (PIC1 + 1)
-#define PIC2_CMD PIC2
-#define PIC2_DATA (PIC2 + 1)
-#define PIC_READ_IRR 0x0a // OCW3 irq ready next CMD read
-#define PIC_READ_ISR 0x0b // OCW3 irq service next CMD read
-
-#define PIC_EOI 0x20
-
-// pic reinitialization constants
-#define ICW1_ICW4 0x01 // indicates icw4 will be present
-#define ICW1_SINGLE 0x02 // single cascade mode
-#define ICW1_INTERVAL4 0x04 // call address interval 4
-#define ICW1_LEVEL 0x08 // level triggered (edge) mode
-#define ICW1_INIT 0x10 // initialization
-
-#define ICW4_8086 0x01 // 8086 mode
-#define ICW4_AUTO 0x02 // auto (normal) eoi
-#define ICW4_BUF_SLAVE 0x08 // buffered mode/slave
-#define ICW4_BUF_MASTER 0x0C // buffered mode/master
-#define ICW4_SFNM 0x10 // special fully nested (not)
-
-void pic_send_eoi(unsigned char irq) {
- if (irq >= 8) {
- outb(PIC2_CMD, PIC_EOI);
- }
- outb(PIC1_CMD, PIC_EOI);
-}
-
-// offset 1 is for master, offset 2 is for slave
-void pic_remap(int offset1, int offset2) {
- unsigned char a1, a2;
-
- a1 = inb(PIC1_DATA); // save masks
- a2 = inb(PIC2_DATA);
-
- outb(PIC1_CMD, ICW1_INIT | ICW1_ICW4); // starts initialization in cascade mode
- io_wait();
- outb(PIC2_CMD, ICW1_INIT | ICW1_ICW4);
- io_wait();
- outb(PIC1_DATA, offset1); // icw2: master and slave vector offset set
- io_wait();
- outb(PIC2_DATA, offset2);
- io_wait();
- outb(PIC1_DATA, 4); // tells master pic theres a slave pic at irq2
- io_wait();
- outb(PIC2_DATA, 2); // tells slave pic its cascade identity
- io_wait();
-
- outb(PIC1_DATA, ICW4_8086);
- io_wait();
- outb(PIC2_DATA, ICW4_8086);
- io_wait();
-
- outb(PIC1_DATA, a1); // restore masks
- outb(PIC2_DATA, a2);
-
- for (char i = 0; i < 15; i++)
- {
- irq_set_mask(i);
- }
-}
-
-void irq_set_mask(unsigned char irq) {
- uint16_t port;
- uint8_t value;
-
- if (irq < 8) {
- port = PIC1_DATA;
- } else {
- port = PIC2_DATA;
- irq -= 8;
- }
- value = inb(port) | (1 << irq);
- outb(port, value);
-}
-
-void irq_clear_mask(unsigned char irq) {
- uint16_t port;
- uint8_t value;
-
- if (irq < 8) {
- port = PIC1_DATA;
- } else {
- port = PIC2_DATA;
- irq -= 8;
- }
- value = inb(port) & ~(1 << irq);
- outb(port, value);
-}
\ No newline at end of file |