Import backup from 2005-08-18
This commit is contained in:
josh committed
1 parent
e1682a2fe7
commit
345ef6c9f3
35 files changed
+804
-89
No files matched your search
@@ -0,0 +1,149 @@
|
||||
// proc.c
|
||||
// Author: Josh Holtrop
|
||||
// Date; 08/18/05
|
||||
// Modified: 08/18/05
|
||||
|
||||
extern int mm_freepages;
|
||||
|
||||
#include "hos_defines.h"
|
||||
#include "proc.h"
|
||||
#include "mm/mm.h"
|
||||
#include "mm/vmm.h"
|
||||
#include "lang/lang.h"
|
||||
#include "kernel.h"
|
||||
|
||||
u32_t cur_task = 0;
|
||||
u32_t n_processes = 0;
|
||||
process_t *processes[3];
|
||||
|
||||
int proc_init()
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void proc_sched(int_stack_t *stack_frame)
|
||||
{
|
||||
cur_task = (cur_task + 1) & 1;
|
||||
write_cr3(processes[cur_task]
|
||||
}
|
||||
|
||||
u32_t create_task(void *base, u32_t image_size, u32_t bss_size, void *entry);
|
||||
{
|
||||
process_t *proc = create_process(vase, image_size, bss_size, entry);
|
||||
processes[n_processes] = proc;
|
||||
return n_processes++;
|
||||
}
|
||||
|
||||
process_t *create_process(void *base, u32_t image_size, u32_t bss_size, void *entry);
|
||||
{
|
||||
if (mm_freepages < pages + bsspages + 25)
|
||||
return 0;
|
||||
process_t *process = New(process_t); /* Allocate process_t struct */
|
||||
create_address_space(process);
|
||||
create_process_stack(process);
|
||||
int i;
|
||||
u32_t *ptr32 = process->v_page_dir = vmm_palloc();
|
||||
for (i = 0; i < 1024; i++)
|
||||
*ptr32++ = 0;
|
||||
u32_t code_data_pages = (image_size >> 12) +
|
||||
((image_size & 0x3FF) ? 1 : 0);
|
||||
u32_t bss_pages = (bss_size >> 12) + ((bss_size & 0x3FF) ? 1 : 0);
|
||||
/* Load program at address 0 */
|
||||
copy_into_address_space(0, base, code_data_pages, process);
|
||||
zero_address_space(code_data_pages << 12, bss_pages, process);
|
||||
ptr32 = process->v_page_dir;
|
||||
for (i = 0; i < 1024; i++)
|
||||
if (*ptr32)
|
||||
vmm_unmapp(*ptr32);
|
||||
vmm_unmapp(process->v_page_dir);
|
||||
process->v_page_dir = 0;
|
||||
return process;
|
||||
}
|
||||
|
||||
void create_address_space(process_t *p)
|
||||
{
|
||||
/* Allocate a new page directory */
|
||||
p->page_dir = vmm_palloc_addr(&p->p_page_dir);
|
||||
int i;
|
||||
u32_t *ptr32 = p->page_dir;
|
||||
for (i = 0; i < 768; i++) /* zero 3 gigs */
|
||||
*ptr32++ = 0;
|
||||
memcpyd(ptr32, (void *)0xFFFFF000, 256); /* 1 gig kernel mem */
|
||||
}
|
||||
|
||||
void create_process_stack(process_t *p)
|
||||
{
|
||||
u32_t p_stack_table, p_stack;
|
||||
u32_t *v_stack_table = vmm_palloc_addr(&p_stack_table);
|
||||
void *v_stack = vmm_palloc_addr(&p_stack);
|
||||
int i;
|
||||
u32_t *ptr32 = v_stack_table;
|
||||
for (int i = 0; i < 1023; i++)
|
||||
*ptr32++ = 0;
|
||||
v_stack_table[1032] = p_stack | 0x7; /* user permissions */
|
||||
p->page_dir[511] = p_stack_table | 0x7;
|
||||
vmm_unmapp(v_stack_table);
|
||||
vmm_unmapp(v_stack);
|
||||
p->esp = 0x80000000; /* Stack at 2GB */
|
||||
}
|
||||
|
||||
/* Copy pages into new address space (v_page_dir must be set up) */
|
||||
void copy_into_address_space(u32_t dest_addr,
|
||||
void *src_addr,
|
||||
u32_t pages,
|
||||
process_t *p)
|
||||
{
|
||||
u32_t pde, pte;
|
||||
void *page;
|
||||
while (pages)
|
||||
{
|
||||
pde = dest_addr >> 22;
|
||||
pte = (dest_addr >> 12) & 0x3FF;
|
||||
u32_t p_page_addr;
|
||||
if (!p->v_page_dir[pde])
|
||||
{
|
||||
/* Time for a new page table & page directory entry! */
|
||||
p->v_page_dir[pde] = vmm_palloc_addr(&p_page_addr);
|
||||
p->page_dir[pde] = p_page_addr | 0x7;
|
||||
vmm_unmapp(p->v_page_dir[pde]);
|
||||
}
|
||||
page = vmm_palloc_addr(&p_page_addr);
|
||||
((u32_t *)(p->v_page_dir[pde]))[pte] = p_page_addr | 0x7;
|
||||
memcpyd(page, src_addr, 1024);
|
||||
vmm_unmapp(page);
|
||||
dest_addr += 4096;
|
||||
src_addr += 4096;
|
||||
pages--;
|
||||
}
|
||||
}
|
||||
|
||||
/* Zeros pages into new address space (v_page_dir must be set up) */
|
||||
void zero_address_space(u32_t dest_addr, u32_t pages, process_t *p)
|
||||
{
|
||||
u32_t pde, pte;
|
||||
void *page;
|
||||
while (pages)
|
||||
{
|
||||
pde = dest_addr >> 22;
|
||||
pte = (dest_addr >> 12) & 0x3FF;
|
||||
u32_t p_page_addr;
|
||||
if (!p->v_page_dir[pde])
|
||||
{
|
||||
/* Time for a new page table & page directory entry! */
|
||||
p->v_page_dir[pde] = vmm_palloc_addr(&p_page_addr);
|
||||
p->page_dir[pde] = p_page_addr | 0x7;
|
||||
vmm_unmapp(p->v_page_dir[pde]);
|
||||
}
|
||||
page = vmm_palloc_addr(&p_page_addr);
|
||||
((u32_t *)(p->v_page_dir[pde]))[pte] = p_page_addr | 0x7;
|
||||
memsetd(page, 0, 1024);
|
||||
vmm_unmapp(page);
|
||||
dest_addr += 4096;
|
||||
pages--;
|
||||
}
|
||||
}
|
||||
|
||||
u32_t fork(process_t *p)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
@@ -0,0 +1,37 @@
|
||||
// proc.h
|
||||
// Author: Josh Holtrop
|
||||
// Date; 08/18/05
|
||||
// Modified: 08/18/05
|
||||
|
||||
#ifndef __HOS_PROC_H__
|
||||
#define __HOS_PROC_H__ __HOS_PROC_H__
|
||||
|
||||
#include "hos_defines.h"
|
||||
#include "kernel.h"
|
||||
|
||||
typedef struct
|
||||
{
|
||||
u32_t *page_dir; /* Page directory with physical PT addys */
|
||||
u32_t *v_page_dir; /* Virtual page table addresses for init */
|
||||
u32_t p_page_dir; /* Physical address of page directory */
|
||||
u32_t size; /* Process size, bytes from 0 through bss */
|
||||
u32_t esp; /* Process stack pointer */
|
||||
int_stack_frame_t stack_frame;
|
||||
} process_t;
|
||||
|
||||
int proc_init(int_stack_t *stack_frame);
|
||||
void proc_sched();
|
||||
u32_t create_task(void *base, u32_t image_size, u32_t bss_size, void *entry);
|
||||
process_t *create_process(void *base, u32_t image_size, u32_t bss_size, void *entry);
|
||||
void create_address_space(process_t *p);
|
||||
void create_process_stack(process_t *p);
|
||||
void copy_into_address_space(u32_t dest_addr,
|
||||
void *src_addr,
|
||||
u32_t pages,
|
||||
process_t *p);
|
||||
void zero_address_space(u32_t dest_addr, u32_t pages, process_t *p);
|
||||
u32_t fork(process_t *p);
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
Reference in new issue
Block a user