Espresso 0.0.0e

include/drivers/gdt_ec.c

@@ -0,0 +1,8 @@
+#ifndef _GDT_EC_H
+#define _GDT_EC_H
+
+#include <types.h>
+
+void create_descriptor(uint32_t base, uint32_t limit, uint16_t flag);
+
+#endif

include/drivers/gdt_ec.h

@@ -0,0 +1,50 @@
+#ifndef _GDT_EC_H
+#define _GDT_EC_H
+
+#include <types.h>
+
+// Each define here is for a specific flag in the descriptor.
+// Refer to the intel documentation for a description of what each one does.
+#define SEG_DESCTYPE(x)  ((x) << 0x04) // Descriptor type (0 for system, 1 for code/data)
+#define SEG_PRES(x)      ((x) << 0x07) // Present
+#define SEG_SAVL(x)      ((x) << 0x0C) // Available for system use
+#define SEG_LONG(x)      ((x) << 0x0D) // Long mode
+#define SEG_SIZE(x)      ((x) << 0x0E) // Size (0 for 16-bit, 1 for 32)
+#define SEG_GRAN(x)      ((x) << 0x0F) // Granularity (0 for 1B - 1MB, 1 for 4KB - 4GB)
+#define SEG_PRIV(x)     (((x) &  0x03) << 0x05)   // Set privilege level (0 - 3)
+ 
+#define SEG_DATA_RD        0x00 // Read-Only
+#define SEG_DATA_RDA       0x01 // Read-Only, accessed
+#define SEG_DATA_RDWR      0x02 // Read/Write
+#define SEG_DATA_RDWRA     0x03 // Read/Write, accessed
+#define SEG_DATA_RDEXPD    0x04 // Read-Only, expand-down
+#define SEG_DATA_RDEXPDA   0x05 // Read-Only, expand-down, accessed
+#define SEG_DATA_RDWREXPD  0x06 // Read/Write, expand-down
+#define SEG_DATA_RDWREXPDA 0x07 // Read/Write, expand-down, accessed
+#define SEG_CODE_EX        0x08 // Execute-Only
+#define SEG_CODE_EXA       0x09 // Execute-Only, accessed
+#define SEG_CODE_EXRD      0x0A // Execute/Read
+#define SEG_CODE_EXRDA     0x0B // Execute/Read, accessed
+#define SEG_CODE_EXC       0x0C // Execute-Only, conforming
+#define SEG_CODE_EXCA      0x0D // Execute-Only, conforming, accessed
+#define SEG_CODE_EXRDC     0x0E // Execute/Read, conforming
+#define SEG_CODE_EXRDCA    0x0F // Execute/Read, conforming, accessed
+ 
+#define GDT_CODE_PL0 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \
+                     SEG_LONG(0)     | SEG_SIZE(1) | SEG_GRAN(1) | \
+                     SEG_PRIV(0)     | SEG_CODE_EXRD
+ 
+#define GDT_DATA_PL0 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \
+                     SEG_LONG(0)     | SEG_SIZE(1) | SEG_GRAN(1) | \
+                     SEG_PRIV(0)     | SEG_DATA_RDWR
+ 
+#define GDT_CODE_PL3 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \
+                     SEG_LONG(0)     | SEG_SIZE(1) | SEG_GRAN(1) | \
+                     SEG_PRIV(3)     | SEG_CODE_EXRD
+ 
+#define GDT_DATA_PL3 SEG_DESCTYPE(1) | SEG_PRES(1) | SEG_SAVL(0) | \
+                     SEG_LONG(0)     | SEG_SIZE(1) | SEG_GRAN(1) | \
+                     SEG_PRIV(3)     | SEG_DATA_RDWR
+
+
+#endif

include/drivers/idt.h

@@ -0,0 +1,13 @@
+#ifndef _IDT_H
+#define _IDT_H
+
+#include <types.h>
+
+
+void idt_init(void);
+void pic_remap(void);
+void idt_set_descriptor(uint8_t vector, void* isr, uint8_t flags);
+void exception_dispatcher(uint32_t int_no, uint32_t err_code);
+
+
+#endif

include/drivers/irq.h

@@ -0,0 +1,8 @@
+#ifndef _IRQ_H
+#define _IRQ_H
+
+#include <types.h>
+
+void irq_handler(uint8_t irq_number);
+
+#endif

include/drivers/pit.h

@@ -3,5 +3,7 @@
 
 #include <types.h>
 
+void pit_init(uint32_t freq);
+void sleep(uint32_t millis);
 
 #endif

include/drivers/ps2_keyboard.h

@@ -2,9 +2,7 @@
 #define _PS2_KEYBOARD_H
 
 #include <types.h>
-#include <isr.h>
 
 void keyboard_init(void);
-void keyboard_handler(isr_stack_t* regs);
 
 #endif

include/drivers/timer.h

@@ -0,0 +1,11 @@
+#ifndef _TIMER_H
+#define _TIMER_H
+
+#include <stdint.h>
+
+extern volatile uint32_t tick_count;
+
+void timer_sleep(uint32_t ms);
+void pit_init(uint32_t frequency);
+
+#endif