88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
#include "types.h"
|
|
#include "param.h"
|
|
#include "mmu.h"
|
|
#include "proc.h"
|
|
#include "defs.h"
|
|
#include "x86.h"
|
|
#include "traps.h"
|
|
#include "syscall.h"
|
|
|
|
extern char edata[], end[];
|
|
|
|
char buf[512];
|
|
|
|
int
|
|
main()
|
|
{
|
|
struct proc *p;
|
|
int i;
|
|
|
|
// clear BSS
|
|
memset(edata, 0, end - edata);
|
|
|
|
cprintf("\nxV6\n\n");
|
|
|
|
kinit(); // physical memory allocator
|
|
tinit(); // traps and interrupts
|
|
pic_init();
|
|
|
|
// create fake process zero
|
|
p = &proc[0];
|
|
curproc = p;
|
|
p->state = WAITING;
|
|
p->sz = PAGE;
|
|
p->mem = kalloc(p->sz);
|
|
memset(p->mem, 0, p->sz);
|
|
p->kstack = kalloc(KSTACKSIZE);
|
|
p->tf = (struct Trapframe *) (p->kstack + KSTACKSIZE - sizeof(struct Trapframe));
|
|
memset(p->tf, 0, sizeof(struct Trapframe));
|
|
p->tf->tf_es = p->tf->tf_ds = p->tf->tf_ss = (SEG_UDATA << 3) | 3;
|
|
p->tf->tf_cs = (SEG_UCODE << 3) | 3;
|
|
p->tf->tf_eflags = FL_IF;
|
|
p->pid = 0;
|
|
p->ppid = 0;
|
|
setupsegs(p);
|
|
|
|
// turn on interrupts
|
|
write_eflags(read_eflags() | FL_IF);
|
|
irq_setmask_8259A(0);
|
|
|
|
#if 1
|
|
ide_read(0, buf, 1);
|
|
cprintf("sec0.0 %x\n", buf[0] & 0xff);
|
|
#endif
|
|
|
|
#if 0
|
|
p = newproc();
|
|
|
|
i = 0;
|
|
p->mem[i++] = 0x90; // nop
|
|
p->mem[i++] = 0xb8; // mov ..., %eax
|
|
p->mem[i++] = SYS_fork;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0xcd; // int
|
|
p->mem[i++] = T_SYSCALL;
|
|
p->mem[i++] = 0xb8; // mov ..., %eax
|
|
p->mem[i++] = SYS_wait;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0xcd; // int
|
|
p->mem[i++] = T_SYSCALL;
|
|
p->mem[i++] = 0xb8; // mov ..., %eax
|
|
p->mem[i++] = SYS_exit;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0;
|
|
p->mem[i++] = 0xcd; // int
|
|
p->mem[i++] = T_SYSCALL;
|
|
p->tf->tf_eip = 0;
|
|
p->tf->tf_esp = p->sz;
|
|
#endif
|
|
|
|
swtch();
|
|
|
|
return 0;
|
|
}
|