130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
#ifndef __SYSTEM_H
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#define __SYSTEM_H
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/* Types */
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#define NULL ((void *)0UL)
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typedef unsigned long uintptr_t;
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typedef long size_t;
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typedef unsigned int uint32_t;
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/* Unimportant Kernel Strings */
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#define KERNEL_UNAME "ToAruOS"
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#define KERNEL_VERSION_STRING "0.0.1"
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#define CHAR_BIT 8
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#define INT32_MAX 0x7fffffffL
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#define UINT32_MAX 0xffffffffL
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extern void * sbrk(uintptr_t increment);
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/* Kernel Main */
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extern void *memcpy(void * restrict dest, const void * restrict src, size_t count);
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extern void *memset(void *dest, int val, size_t count);
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extern unsigned short *memsetw(unsigned short *dest, unsigned short val, int count);
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extern int strlen(const char *str);
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extern unsigned char inportb (unsigned short _port);
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extern void outportb (unsigned short _port, unsigned char _data);
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/* Panic */
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#define HALT_AND_CATCH_FIRE(mesg) halt_and_catch_fire(mesg, __FILE__, __LINE__)
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#define ASSERT(statement) ((statement) ? (void)0 : assert_failed(__FILE__, __LINE__, #statement))
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#define assert(statement) ((statement) ? (void)0 : assert_failed(__FILE__, __LINE__, #statement))
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void halt_and_catch_fire(char * error_message, const char * file, int line);
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void assert_failed(const char *file, uint32_t line, const char *desc);
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/* VGA driver */
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extern void cls();
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extern void putch(unsigned char c);
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extern void puts(char *str);
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extern void settextcolor(unsigned char forecolor, unsigned char backcolor);
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extern void resettextcolor();
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extern void init_video();
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/* GDT */
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extern void gdt_install();
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extern void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
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/* IDT */
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extern void idt_install();
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extern void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
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/* Registers */
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struct regs {
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unsigned int gs, fs, es, ds;
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unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;
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unsigned int int_no, err_code;
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unsigned int eip, cs, eflags, useresp, ss;
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};
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typedef void (*irq_handler_t)(struct regs *);
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/* ISRS */
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extern void isrs_install();
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extern void isrs_install_handler(int isrs, irq_handler_t);
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extern void isrs_uninstall_handler(int isrs);
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/* Interrupt Handlers */
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extern void irq_install();
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extern void irq_install_handler(int irq, irq_handler_t);
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extern void irq_uninstall_handler(int irq);
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/* Timer */
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extern void timer_install();
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extern long timer_ticks;
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extern void timer_wait(int ticks);
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/* Keyboard */
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extern void keyboard_install();
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extern void keyboard_wait();
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/* kprintf */
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extern void kprintf(const char *fmt, ...);
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/* Memory Management */
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extern uintptr_t placement_pointer;
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extern uintptr_t kmalloc_real(size_t size, int align, uintptr_t * phys);
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extern uintptr_t kmalloc(size_t size);
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extern uintptr_t kvmalloc(size_t size);
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extern uintptr_t kmalloc_p(size_t size, uintptr_t * phys);
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extern uintptr_t kvmalloc_p(size_t size, uintptr_t * phys);
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typedef struct page {
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uint32_t present : 1;
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uint32_t rw : 1;
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uint32_t user : 1;
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uint32_t accessed: 1;
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uint32_t dirty : 1;
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uint32_t unused : 7;
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uint32_t frame : 20;
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} page_t;
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typedef struct page_table {
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page_t pages[1024];
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} page_table_t;
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typedef struct page_directory {
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page_table_t *tables[1024]; /* 1024 pointers to page tables... */
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uintptr_t physical_tables[1024]; /* Physical addresses of the tables */
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uintptr_t physical_address; /* The physical address of physical_tables */
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} page_directory_t;
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page_directory_t * kernel_directory;
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page_directory_t * current_directory;
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extern void paging_install(uint32_t memsize);
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extern void switch_page_directory(page_directory_t *new);
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extern page_t *get_page(uintptr_t address, int make, page_directory_t *dir);
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extern void page_fault(struct regs *r);
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void heap_install();
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/* klmalloc */
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void * __attribute__ ((malloc)) malloc(size_t size);
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void * __attribute__ ((malloc)) realloc(void * ptr, size_t size);
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void * __attribute__ ((malloc)) calloc(size_t nmemb, size_t size);
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#endif
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