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Merge pull request #121 from fgsoftware1/drivers
PIT
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,34 +1,32 @@ | ||
| #include "../include/libc/include/types.h" | ||
| #include "../include/isr.h" | ||
| #include "../include/idt.h" | ||
| #include "../include/io.h" | ||
| #include "../include/drivers/pic.h" | ||
|
|
||
| void init_pic() { | ||
| printf("Initiating PIC...\n"); | ||
| u8 a1, a2; | ||
|
|
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| a1 = inportb(PIC1_DATA); | ||
| a2 = inportb(PIC2_DATA); | ||
| a1 = inportb(PIC_MASTER_DATA); | ||
| a2 = inportb(PIC_SLAVE_DATA); | ||
|
|
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| outportb(PIC1_COMMAND, ICW1); | ||
| outportb(PIC2_COMMAND, ICW1); | ||
| outportb(PIC_MASTER_COMMAND, PIC_ICW1); | ||
| outportb(PIC_SLAVE_COMMAND, PIC_ICW1); | ||
|
|
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| outportb(PIC1_DATA, 0x20); | ||
| outportb(PIC2_DATA, 0x28); | ||
| outportb(PIC_MASTER_DATA, 0x20); | ||
| outportb(PIC_SLAVE_DATA, 0x28); | ||
|
|
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| outportb(PIC1_DATA, 4); | ||
| outportb(PIC2_DATA, 2); | ||
| outportb(PIC_MASTER_DATA, 4); | ||
| outportb(PIC_SLAVE_DATA, 2); | ||
|
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| outportb(PIC1_DATA, ICW4_8086); | ||
| outportb(PIC2_DATA, ICW4_8086); | ||
| outportb(PIC_MASTER_DATA, PIC_ICW4_8086); | ||
| outportb(PIC_SLAVE_DATA, PIC_ICW4_8086); | ||
|
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||
| outportb(PIC1_DATA, a1); | ||
| outportb(PIC2_DATA, a2); | ||
| outportb(PIC_MASTER_DATA, a1); | ||
| outportb(PIC_SLAVE_DATA, a2); | ||
| } | ||
|
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||
| void pic_eoi(u8 irq) { | ||
| if(irq >= 0x28) | ||
| outportb(PIC2, PIC_EOI); | ||
| outportb(PIC1, PIC_EOI); | ||
| outportb(PIC_SLAVE_COMMAND, PIC_EOI); | ||
| outportb(PIC_MASTER_COMMAND, PIC_EOI); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| #include "../include/drivers/pit.h" | ||
| #include "../include/console.h" | ||
| #include "../include/io.h" | ||
| #include "../include/isr.h" | ||
|
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| u64 ticks; | ||
| const u32 freq = 100; | ||
|
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| void pit_handler(struct registers_t *r) { ticks += 1; } | ||
|
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| void init_pit() { | ||
| printf("Initiating PIT...\n"); | ||
| isr_register_interrupt_handler(IRQ_BASE + IRQ_TIMER, pit_handler); | ||
| start_pit_timer(); | ||
| } | ||
|
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| void start_pit_timer() { | ||
| if (freq == 0) { | ||
| printf("Can't divide by zero!"); | ||
| return; | ||
| } | ||
|
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| u16 divisor = 1193180 / freq; | ||
|
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| outportb(PIT_COMMAND_PORT, PIT_COMMAND_REGISTER); | ||
| outportb(PIT_CH0_DATA_PORT, (u8)(divisor & 0xFF)); // Send the low byte | ||
| outportb(PIT_CH0_DATA_PORT, (u8)((divisor >> 8) & 0xFF)); // Send the high byte | ||
| } | ||
|
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| void stop_pit_timer() { outportb(PIT_COMMAND_PORT, 0x30); } | ||
|
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| u8 read_pit(u8 channel) { | ||
| u8 port; | ||
| switch (channel) { | ||
| case 0: | ||
| port = PIT_CH0_DATA_PORT; | ||
| break; | ||
| case 1: | ||
| port = PIT_CH1_DATA_PORT; | ||
| break; | ||
| case 2: | ||
| port = PIT_CH2_DATA_PORT; | ||
| break; | ||
| default: | ||
| // Handle invalid channel | ||
| break; | ||
| } | ||
|
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| // Read from the specified channel | ||
| u8 value = inportb(port); | ||
| return value; | ||
| } | ||
|
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| void write_pit(u8 channel, u8 value) { | ||
| u8 port; | ||
| switch (channel) { | ||
| case 0: | ||
| port = PIT_CH0_DATA_PORT; | ||
| break; | ||
| case 1: | ||
| port = PIT_CH1_DATA_PORT; | ||
| break; | ||
| case 2: | ||
| port = PIT_CH2_DATA_PORT; | ||
| break; | ||
| default: | ||
| // Handle invalid channel | ||
| break; | ||
| } | ||
|
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| // Write to the specified channel | ||
| outportb(port, value); | ||
| } | ||
|
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| void sleep(u32 milliseconds) { | ||
| // Calculate the number of PIT ticks needed for the delay | ||
| u32 ticks = milliseconds * 1000 / ticks; | ||
|
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| // Save the current PIT channel 0 count | ||
| u8 initialCounter = inportb(PIT_CH0_DATA_PORT); | ||
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| start_pit_timer(); | ||
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| while (ticks > 0) { | ||
| // Wait for PIT interrupt | ||
| ticks--; | ||
| } | ||
|
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| // Restore the initial PIT channel 0 count | ||
| outportb(PIT_COMMAND_REGISTER, 0x36); // Set the operating mode to square wave generator | ||
| outportb(PIT_CH0_DATA_PORT, initialCounter); // Set the initial counter value | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| #ifndef PIT_H | ||
| #define PIT_H | ||
|
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| #define PIT_CH0_DATA_PORT 0x40 | ||
| #define PIT_CH1_DATA_PORT 0x41 | ||
| #define PIT_CH2_DATA_PORT 0x42 | ||
| #define PIT_COMMAND_PORT 0x43 | ||
| #define PIT_COMMAND_REGISTER 0x36 | ||
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| #include "../libc/include/types.h" | ||
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| void init_pit(); | ||
| void start_pit_timer(); | ||
| void stop_pit_timer(); | ||
| void sleep(u32 milliseconds); | ||
| u8 read_pit(u8 channel); | ||
| void write_pit(u8 channel, u8 value); | ||
|
|
||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,57 +1,33 @@ | ||
| #include "./include/libc/include/types.h" | ||
| #include "./include/libc/include/defines.h" | ||
| #include "include/io.h" | ||
| #include "./include/libc/include/defines.h" | ||
| #include "./include/libc/include/types.h" | ||
|
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| u8 inportb(u16 port) | ||
| { | ||
| u8 ret; | ||
| asmv("inb %1, %0" | ||
| : "=a"(ret) | ||
| : "Nd"(port)); | ||
| return ret; | ||
| } | ||
|
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| void outportb(u16 port, u8 val) | ||
| { | ||
| asmv("outb %1, %0" ::"dN"(port), "a"(val)); | ||
| u8 inportb(u16 port) { | ||
| u8 ret; | ||
| asmv("inb %1, %0" : "=a"(ret) : "dN"(port)); | ||
| return ret; | ||
| } | ||
|
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| u16 inports(u16 port) | ||
| { | ||
| u16 rv; | ||
| asmv("inw %1, %0" | ||
| : "=a"(rv) | ||
| : "dN"(port)); | ||
| return rv; | ||
| void outportb(u16 port, u8 data) { | ||
| asmv("outb %1, %0" ::"dN"(port), "a"(data)); | ||
| } | ||
|
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| void outports(u16 port, u16 data) | ||
| { | ||
| asmv("outw %1, %0" | ||
| : | ||
| : "dN"(port), "a"(data)); | ||
| u16 inportw(u16 port) { | ||
| u16 rv; | ||
| asmv("inw %1, %0" : "=a"(rv) : "dN"(port)); | ||
| return rv; | ||
| } | ||
|
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| u32 inportl(u16 port) | ||
| { | ||
| u32 rv; | ||
| asmv("inl %%dx, %%eax" | ||
| : "=a"(rv) | ||
| : "dN"(port)); | ||
| return rv; | ||
| void outportw(u16 port, u16 data) { | ||
| asmv("outw %1, %0" : : "dN"(port), "a"(data)); | ||
| } | ||
|
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| void outportl(u16 port, u32 data) | ||
| { | ||
| asmv("outl %%eax, %%dx" | ||
| : | ||
| : "dN"(port), "a"(data)); | ||
| u32 inportl(u16 port) { | ||
| u32 rv; | ||
| asmv("inl %%dx, %%eax" : "=a"(rv) : "dN"(port)); | ||
| return rv; | ||
| } | ||
|
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| void insw(u16 port, void *buffer, u32 count) | ||
| { | ||
| asmv("cld; rep insw" | ||
| : "+D"(buffer), "+c"(count) | ||
| : "d"(port) | ||
| : "memory"); | ||
| void outportl(u16 port, u32 data) { | ||
| asmv("outl %%eax, %%dx" : : "dN"(port), "a"(data)); | ||
| } |
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