diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/cpu.c | 69 | ||||
| -rw-r--r-- | src/drivers/ide.c | 41 | ||||
| -rw-r--r-- | src/drivers/interrupts.asm | 142 | ||||
| -rw-r--r-- | src/drivers/interrupts.c | 231 | ||||
| -rw-r--r-- | src/drivers/keyboard.c | 68 | ||||
| -rw-r--r-- | src/drivers/serial.c | 32 | ||||
| -rw-r--r-- | src/drivers/timer.c | 39 | ||||
| -rw-r--r-- | src/drivers/vesa.c | 40 |
8 files changed, 0 insertions, 662 deletions
diff --git a/src/drivers/cpu.c b/src/drivers/cpu.c deleted file mode 100644 index 5c27c51..0000000 --- a/src/drivers/cpu.c +++ /dev/null @@ -1,69 +0,0 @@ -// MIT License, Copyright (c) 2020 Marvin Borner -// This file is a wrapper around some CPU asm calls - -#include <def.h> - -u8 inb(u16 port) -{ - u8 value; - __asm__ volatile("inb %1, %0" : "=a"(value) : "Nd"(port)); - return value; -} - -u16 inw(u16 port) -{ - u16 value; - __asm__ volatile("inw %1, %0" : "=a"(value) : "Nd"(port)); - return value; -} - -u32 inl(u16 port) -{ - u32 value; - __asm__ volatile("inl %1, %0" : "=a"(value) : "Nd"(port)); - return value; -} - -void insl(u16 port, void *addr, int n) -{ - __asm__ volatile("cld; rep insl" - : "=D"(addr), "=c"(n) - : "d"(port), "0"(addr), "1"(n) - : "memory", "cc"); -} - -void outb(u16 port, u8 data) -{ - __asm__ volatile("outb %0, %1" ::"a"(data), "Nd"(port)); -} - -void outw(u16 port, u16 data) -{ - __asm__ volatile("outw %0, %1" ::"a"(data), "Nd"(port)); -} - -void outl(u16 port, u32 data) -{ - __asm__ volatile("outl %0, %1" ::"a"(data), "Nd"(port)); -} - -void cli() -{ - __asm__ volatile("cli"); -} - -void sti() -{ - __asm__ volatile("sti"); -} - -void hlt() -{ - __asm__ volatile("hlt"); -} - -void idle() -{ - while (1) - hlt(); -} diff --git a/src/drivers/ide.c b/src/drivers/ide.c deleted file mode 100644 index fe3955c..0000000 --- a/src/drivers/ide.c +++ /dev/null @@ -1,41 +0,0 @@ -// MIT License, Copyright (c) 2020 Marvin Borner - -#include <cpu.h> -#include <def.h> -#include <ide.h> - -int ide_wait(int check) -{ - char r; - - // Wait while drive is busy. Once just ready is set, exit the loop - while (((r = (char)inb(IDE_IO | IDE_CMD)) & (IDE_BUSY | IDE_READY)) != IDE_READY) - ; - - // Check for errors - if (check && (r & (IDE_DRIVE_FAULT | IDE_ERROR)) != 0) - return 0xF; - return 0; -} - -void *ide_read(void *b, u32 block) -{ - int sector_per_block = BLOCK_SIZE / SECTOR_SIZE; // 2 - int sector = block * sector_per_block; - - ide_wait(0); - outb(IDE_IO | IDE_SECTOR_COUNT, sector_per_block); // Number of sectors - outb(IDE_IO | IDE_LOW, LBA_LOW(sector)); - outb(IDE_IO | IDE_MID, LBA_MID(sector)); - outb(IDE_IO | IDE_HIGH, LBA_HIGH(sector)); - - // Slave/Master << 4 and last 4 bits - outb(IDE_IO | IDE_HEAD, 0xE0 | (1 << 4) | LBA_LAST(sector)); - outb(IDE_IO | IDE_CMD, IDE_CMD_READ); - ide_wait(0); - - // Read-only - insl(IDE_IO, b, BLOCK_SIZE / 4); - - return b; -} diff --git a/src/drivers/interrupts.asm b/src/drivers/interrupts.asm deleted file mode 100644 index 59c323c..0000000 --- a/src/drivers/interrupts.asm +++ /dev/null @@ -1,142 +0,0 @@ -; MIT License, Copyright (c) 2020 Marvin Borner - -; IRQ - -%macro IRQ 2 - global irq%1 - irq%1: - cli - push byte 0 - push byte %2 - jmp irq_common_stub -%endmacro - -IRQ 0, 32 -IRQ 1, 33 -IRQ 2, 34 -IRQ 3, 35 -IRQ 4, 36 -IRQ 5, 37 -IRQ 6, 38 -IRQ 7, 39 -IRQ 8, 40 -IRQ 9, 41 -IRQ 10, 42 -IRQ 11, 43 -IRQ 12, 44 -IRQ 13, 45 -IRQ 14, 46 -IRQ 15, 47 - -extern irq_handler -irq_common_stub: - pusha - - push ds - push es - push fs - push gs - - mov ax, 0x10 - mov ds, ax - mov es, ax - mov fs, ax - mov gs, ax - cld - - push esp - call irq_handler - add esp, 4 - - pop gs - pop fs - pop es - pop ds - popa - - add esp, 8 - sti - iret - -; ISR - -%macro ISR_NOERRCODE 1 - global isr%1 - isr%1: - cli - push byte 0 - push %1 - jmp isr_common_stub -%endmacro - -%macro ISR_ERRCODE 1 - global isr%1 - isr%1: - cli - push byte %1 - jmp isr_common_stub -%endmacro - -ISR_NOERRCODE 0 -ISR_NOERRCODE 1 -ISR_NOERRCODE 2 -ISR_NOERRCODE 3 -ISR_NOERRCODE 4 -ISR_NOERRCODE 5 -ISR_NOERRCODE 6 -ISR_NOERRCODE 7 -ISR_ERRCODE 8 -ISR_NOERRCODE 9 -ISR_ERRCODE 10 -ISR_ERRCODE 11 -ISR_ERRCODE 12 -ISR_ERRCODE 13 -ISR_ERRCODE 14 -ISR_NOERRCODE 15 -ISR_NOERRCODE 16 -ISR_NOERRCODE 17 -ISR_NOERRCODE 18 -ISR_NOERRCODE 19 -ISR_NOERRCODE 20 -ISR_NOERRCODE 21 -ISR_NOERRCODE 22 -ISR_NOERRCODE 23 -ISR_NOERRCODE 24 -ISR_NOERRCODE 25 -ISR_NOERRCODE 26 -ISR_NOERRCODE 27 -ISR_NOERRCODE 28 -ISR_NOERRCODE 29 -ISR_NOERRCODE 30 -ISR_NOERRCODE 31 -ISR_NOERRCODE 128 - -extern isr_handler -isr_common_stub: - pusha - - push ds - push es - push fs - push gs - - mov ax, 0x10 - mov ds, ax - mov es, ax - mov fs, ax - mov gs, ax - cld - - push esp - call isr_handler - add esp, 4 - - pop gs - pop fs - pop es - pop ds - popa - - add esp, 8 - sti - iret diff --git a/src/drivers/interrupts.c b/src/drivers/interrupts.c deleted file mode 100644 index 0b94208..0000000 --- a/src/drivers/interrupts.c +++ /dev/null @@ -1,231 +0,0 @@ -// MIT License, Copyright (c) 2020 Marvin Borner -// TODO: Remove some magic numbers - -#include <cpu.h> -#include <def.h> -#include <interrupts.h> -#include <mem.h> -#include <print.h> -#include <serial.h> - -/** - * IDT - */ - -void idt_set_gate(u8 num, u32 base, u16 sel, u8 flags) -{ - // Specify the interrupt routine's base address - idt[num].base_low = (u16)(base & 0xFFFF); - idt[num].base_high = (u16)((base >> 16) & 0xFFFF); - - // Set selector/segment of IDT entry - idt[num].sel = sel; - idt[num].always0 = 0; - idt[num].flags = (u8)(flags | 0x60); -} - -// Install IDT -void idt_install() -{ - // Set IDT pointer and limit - idt_ptr.limit = (sizeof(struct idt_entry) * 256) - 1; - idt_ptr.base = &idt; - - // Clear IDT by setting memory cells to 0 - memset(&idt, 0, sizeof(struct idt_entry) * 256); - - __asm__("lidt %0" : : "m"(idt_ptr)); -} - -/** - * IRQ - */ - -void (*irq_routines[16])(struct regs *) = { 0 }; - -// Install IRQ handler -void irq_install_handler(int irq, void (*handler)(struct regs *r)) -{ - irq_routines[irq] = handler; -} - -// Remove IRQ handler -void irq_uninstall_handler(int irq) -{ - irq_routines[irq] = 0; -} - -// Remap the IRQ table -void irq_remap() -{ - outb(0x20, 0x11); - outb(0xA0, 0x11); - outb(0x21, 0x20); - outb(0xA1, 0x28); - outb(0x21, 0x04); - outb(0xA1, 0x02); - outb(0x21, 0x01); - outb(0xA1, 0x01); - outb(0x21, 0x00); - outb(0xA1, 0x00); -} - -// Handle IRQ ISRs -void irq_handler(struct regs *r) -{ - void (*handler)(struct regs * r); - - // Execute custom handler if exists - handler = irq_routines[r->int_no - 32]; - if (handler) - handler(r); - - // Send EOI to second (slave) PIC - if (r->int_no >= 40) - outb(0xA0, 0x20); - - // Send EOI to master PIC - outb(0x20, 0x20); -} - -// Map ISRs to the correct entries in the IDT -void irq_install() -{ - irq_remap(); - - idt_set_gate(32, (u32)irq0, 0x08, 0x8E); - idt_set_gate(33, (u32)irq1, 0x08, 0x8E); - idt_set_gate(34, (u32)irq2, 0x08, 0x8E); - idt_set_gate(35, (u32)irq3, 0x08, 0x8E); - idt_set_gate(36, (u32)irq4, 0x08, 0x8E); - idt_set_gate(37, (u32)irq5, 0x08, 0x8E); - idt_set_gate(38, (u32)irq6, 0x08, 0x8E); - idt_set_gate(39, (u32)irq7, 0x08, 0x8E); - - idt_set_gate(40, (u32)irq8, 0x08, 0x8E); - idt_set_gate(41, (u32)irq9, 0x08, 0x8E); - idt_set_gate(42, (u32)irq10, 0x08, 0x8E); - idt_set_gate(43, (u32)irq11, 0x08, 0x8E); - idt_set_gate(44, (u32)irq12, 0x08, 0x8E); - idt_set_gate(45, (u32)irq13, 0x08, 0x8E); - idt_set_gate(46, (u32)irq14, 0x08, 0x8E); - idt_set_gate(47, (u32)irq15, 0x08, 0x8E); -} - -/** - * ISR - */ - -void (*isr_routines[256])(struct regs *) = { 0 }; - -const char *isr_exceptions[32] = { "Division By Zero", - "Debug", - "Non Maskable Interrupt", - "Breakpoint", - "Into Detected Overflow", - "Out of Bounds", - "Invalid Opcode", - "No Coprocessor", - - "Double Fault", - "Coprocessor Segment Overrun", - "Bad TSS", - "Segment Not Present", - "Stack Fault", - "General Protection Fault", - "Page Fault", - "Unknown Interrupt", - - "Coprocessor Fault", - "Alignment Check", - "Machine Check", - "Reserved", - "Reserved", - "Reserved", - "Reserved", - "Reserved", - - "Reserved", - "Reserved", - "Reserved", - "Reserved", - "Reserved", - "Reserved", - "Reserved", - "Reserved" }; - -void isr_install_handler(int isr, void (*handler)(struct regs *r)) -{ - isr_routines[isr] = handler; -} - -void isr_uninstall_handler(int isr) -{ - isr_routines[isr] = 0; -} - -void isr_handler(struct regs *r) -{ - void (*handler)(struct regs * r); - - // Execute fault handler if exists - handler = isr_routines[r->int_no]; - if (handler) { - handler(r); - } else if (r->int_no <= 32) { - cli(); - printf("\n%s Exception, halting!\n", isr_exceptions[r->int_no]); - printf("Error code: %d\n", r->err_code); - while (1) { - }; - } -} - -void isr_install() -{ - idt_set_gate(0, (u32)isr0, 0x08, 0x8E); - idt_set_gate(1, (u32)isr1, 0x08, 0x8E); - idt_set_gate(2, (u32)isr2, 0x08, 0x8E); - idt_set_gate(3, (u32)isr3, 0x08, 0x8E); - idt_set_gate(4, (u32)isr4, 0x08, 0x8E); - idt_set_gate(5, (u32)isr5, 0x08, 0x8E); - idt_set_gate(6, (u32)isr6, 0x08, 0x8E); - idt_set_gate(7, (u32)isr7, 0x08, 0x8E); - - idt_set_gate(8, (u32)isr8, 0x08, 0x8E); - idt_set_gate(9, (u32)isr9, 0x08, 0x8E); - idt_set_gate(10, (u32)isr10, 0x08, 0x8E); - idt_set_gate(11, (u32)isr11, 0x08, 0x8E); - idt_set_gate(12, (u32)isr12, 0x08, 0x8E); - idt_set_gate(13, (u32)isr13, 0x08, 0x8E); - idt_set_gate(14, (u32)isr14, 0x08, 0x8E); - idt_set_gate(15, (u32)isr15, 0x08, 0x8E); - - idt_set_gate(16, (u32)isr16, 0x08, 0x8E); - idt_set_gate(17, (u32)isr17, 0x08, 0x8E); - idt_set_gate(18, (u32)isr18, 0x08, 0x8E); - idt_set_gate(19, (u32)isr19, 0x08, 0x8E); - idt_set_gate(20, (u32)isr20, 0x08, 0x8E); - idt_set_gate(21, (u32)isr21, 0x08, 0x8E); - idt_set_gate(22, (u32)isr22, 0x08, 0x8E); - idt_set_gate(23, (u32)isr23, 0x08, 0x8E); - - idt_set_gate(24, (u32)isr24, 0x08, 0x8E); - idt_set_gate(25, (u32)isr25, 0x08, 0x8E); - idt_set_gate(26, (u32)isr26, 0x08, 0x8E); - idt_set_gate(27, (u32)isr27, 0x08, 0x8E); - idt_set_gate(28, (u32)isr28, 0x08, 0x8E); - idt_set_gate(29, (u32)isr29, 0x08, 0x8E); - idt_set_gate(30, (u32)isr30, 0x08, 0x8E); - idt_set_gate(31, (u32)isr31, 0x08, 0x8E); -} - -/** - * Combined - */ -void interrupts_install() -{ - idt_install(); - isr_install(); - irq_install(); -} diff --git a/src/drivers/keyboard.c b/src/drivers/keyboard.c deleted file mode 100644 index 38ff1f7..0000000 --- a/src/drivers/keyboard.c +++ /dev/null @@ -1,68 +0,0 @@ -#include <cpu.h> -#include <def.h> -#include <gui.h> -#include <interrupts.h> - -char keymap[128]; - -// TODO: Use keyboard as event and move logic to other file -void keyboard_handler() -{ - u8 scan_code = inb(0x60); - - if (scan_code > 128) - return; - - if ((scan_code & 0x80) == 0) { // PRESS - gui_term_write_char(keymap[scan_code]); - } -} - -void keyboard_acknowledge() -{ - while (inb(0x60) != 0xfa) - ; -} - -void keyboard_rate() -{ - outb(0x60, 0xF3); - keyboard_acknowledge(); - outb(0x60, 0x0); // Rate{00000} Delay{00} 0 -} - -void keyboard_install() -{ - //keyboard_rate(); TODO: Fix keyboard rate? - irq_install_handler(1, keyboard_handler); -} - -char keymap[128] = { - 0, 27, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', - '\b', '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', - '\n', 17, 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`', - 14, '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', 14, '*', - 0, // Alt key - ' ', // Space bar - 15, // Caps lock - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // F keys - 0, // Num lock - 0, // Scroll lock - 0, // Home key - 0, // Up arrow - 0, // Page up - '-', - 0, // Left arrow - 0, - 0, // Right arrow - '+', - 0, // End key - 0, // Down arrow - 0, // Page down - 0, // Insert key - 0, // Delete key - 0, 0, 0, - 0, // F11 - 0, // F12 - 0, // Other keys -}; diff --git a/src/drivers/serial.c b/src/drivers/serial.c deleted file mode 100644 index dcee4dd..0000000 --- a/src/drivers/serial.c +++ /dev/null @@ -1,32 +0,0 @@ -#include <cpu.h> -#include <def.h> -#include <str.h> - -void serial_install() -{ - outb(0x3f8 + 1, 0x00); - outb(0x3f8 + 3, 0x80); - outb(0x3f8 + 0, 0x03); - outb(0x3f8 + 1, 0x00); - outb(0x3f8 + 3, 0x03); - outb(0x3f8 + 2, 0xC7); - outb(0x3f8 + 4, 0x0B); -} - -int is_transmit_empty() -{ - return inb(0x3f8 + 5) & 0x20; -} - -void serial_put(char ch) -{ - while (is_transmit_empty() == 0) - ; - outb(0x3f8, (u8)ch); -} - -void serial_print(const char *data) -{ - for (u32 i = 0; i < strlen(data); i++) - serial_put(data[i]); -} diff --git a/src/drivers/timer.c b/src/drivers/timer.c deleted file mode 100644 index a3b4137..0000000 --- a/src/drivers/timer.c +++ /dev/null @@ -1,39 +0,0 @@ -// MIT License, Copyright (c) 2020 Marvin Borner - -#include <cpu.h> -#include <def.h> -#include <interrupts.h> - -static u32 timer_ticks = 0; - -void timer_phase(int hz) -{ - int divisor = 3579545 / 3 / hz; - outb(0x43, 0x36); // 01 10 11 0b // CTR, RW, MODE, BCD - outb(0x40, divisor & 0xFF); - outb(0x40, divisor >> 8); -} - -// Executed 1000 times per second -void timer_handler() -{ - timer_ticks++; -} - -// "Delay" function with CPU sleep -void timer_wait(u32 ticks) -{ - u32 eticks; - - eticks = timer_ticks + ticks; - while (timer_ticks < eticks) { - __asm__("sti//hlt//cli"); - } -} - -// Install timer handler into IRQ0 -void timer_install() -{ - timer_phase(1000); - irq_install_handler(0, timer_handler); -} diff --git a/src/drivers/vesa.c b/src/drivers/vesa.c deleted file mode 100644 index 9402664..0000000 --- a/src/drivers/vesa.c +++ /dev/null @@ -1,40 +0,0 @@ -#include <def.h> -#include <vesa.h> - -void vesa_draw_rectangle(int x1, int y1, int x2, int y2, const u32 color[3]) -{ - int pos1 = x1 * vbe_bpl + y1 * vbe_pitch; - u8 *draw = &fb[pos1]; - for (int i = 0; i <= y2 - y1; i++) { - for (int j = 0; j <= x2 - x1; j++) { - draw[vbe_bpl * j] = color[2]; - draw[vbe_bpl * j + 1] = color[1]; - draw[vbe_bpl * j + 2] = color[0]; - } - draw += vbe_pitch; - } -} - -void vesa_set_pixel(u16 x, u16 y, const u32 color[3]) -{ - u8 pos = x * vbe_bpl + y * vbe_pitch; - u8 *draw = &fb[pos]; - draw[pos] = (char)color[2]; - draw[pos + 1] = (char)color[1]; - draw[pos + 2] = (char)color[0]; -} - -void vesa_fill(const u32 color[3]) -{ - vesa_draw_rectangle(0, 0, vbe->width - 1, vbe->height - 1, color); -} - -void vesa_init(struct vbe *info) -{ - vbe = info; - vbe_height = vbe->height; - vbe_width = vbe->width; - vbe_bpl = vbe->bpp >> 3; - vbe_pitch = vbe->pitch; - fb = (u8 *)vbe->framebuffer; -} |