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This commit is contained in:
Taku Shimosawa
2011-12-02 12:35:38 +09:00
parent 5fdb3b2bb2
commit 7999653a00
18 changed files with 536 additions and 64 deletions
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72
kernel/process.c
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@ -23,14 +23,18 @@ struct process *create_process(unsigned long user_pc)
return proc;
}
void update_process_page_table(struct process *process, struct vm_range *range)
extern void __host_update_process_range(struct process *process,
struct vm_range *range);
void update_process_page_table(struct process *process, struct vm_range *range,
enum aal_mc_pt_attribute flag)
{
unsigned long p, pa = range->phys;
p = range->start;
while (p < range->end) {
aal_mc_pt_set_page(process->page_table, (void *)p,
pa, PTATTR_WRITABLE | PTATTR_USER);
pa, PTATTR_WRITABLE | PTATTR_USER | flag);
pa += PAGE_SIZE;
p += PAGE_SIZE;
@ -57,7 +61,17 @@ int add_process_memory_range(struct process *process,
range->start, range->end, range->phys, range->phys +
range->end - range->start);
update_process_page_table(process, range);
if (flag & VR_REMOTE) {
update_process_page_table(process, range, AAL_PTA_REMOTE);
} else if (flag & VR_IO_NOCACHE) {
update_process_page_table(process, range, PTATTR_UNCACHABLE);
} else {
update_process_page_table(process, range, 0);
}
if (!(flag & VR_REMOTE)) {
__host_update_process_range(process, range);
}
list_add_tail(&range->list, &process->vm_range_list);
@ -73,19 +87,23 @@ void init_process_stack(struct process *process)
add_process_memory_range(process, USER_END - PAGE_SIZE,
USER_END,
virt_to_phys(p), VR_STACK);
virt_to_phys(stack), VR_STACK);
/* TODO: fill with actual value of argc, argv, envp */
p[-1] = 0; /* env: "" */
p[-2] = 0x41; /* argv(0): "a" */
p[-3] = USER_END - sizeof(unsigned long); /* envp: END - 8 */
p[-4] = 0; /* argv[1] = NULL */
p[-5] = USER_END - sizeof(unsigned long) * 2; /* argv[0] = END - 16 */
p[-6] = 1; /* argc */
kprintf("%lx, %p\n", virt_to_phys(stack), p);
p[-1] = 0; /* AT_NULL */
p[-2] = 0;
p[-3] = USER_END - sizeof(unsigned long) * 2;
p[-4] = 0; /* env: "" */
p[-5] = 0x41; /* argv(0): "a" */
p[-6] = USER_END - sizeof(unsigned long) * 4; /* envp: END - 8 */
p[-7] = 0; /* argv[1] = NULL */
p[-8] = USER_END - sizeof(unsigned long) * 5; /* argv[0] = END - 16 */
p[-9] = 1; /* argc */
aal_mc_modify_user_context(process->uctx, AAL_UCR_STACK_POINTER,
USER_END - sizeof(unsigned long) * 6);
USER_END - sizeof(unsigned long) * 8);
process->region.stack_end = USER_END;
process->region.stack_start = USER_END - PAGE_SIZE;
}
@ -128,6 +146,7 @@ int remove_process_region(struct process *proc,
return -EINVAL;
}
/* We defer freeing to the time of exit */
while (start < end) {
aal_mc_pt_clear_page(proc->page_table, (void *)start);
start += PAGE_SIZE;
@ -136,6 +155,32 @@ int remove_process_region(struct process *proc,
return 0;
}
extern void print_free_list(void);
void free_process_memory(struct process *proc)
{
struct vm_range *range, *next;
list_for_each_entry_safe(range, next, &proc->vm_range_list,
list) {
if (!(range->flag & VR_REMOTE) &&
!(range->flag & VR_IO_NOCACHE) &&
!(range->flag & VR_RESERVED)) {
aal_mc_free_pages(phys_to_virt(range->phys),
(range->end - range->start)
>> PAGE_SHIFT);
}
list_del(&range->list);
aal_mc_free(range);
}
/* TODO: Free page tables */
proc->status = PS_ZOMBIE;
}
void destroy_process(struct process *proc)
{
aal_mc_free_pages(proc, 1);
}
static void idle(void)
{
while (1) {
@ -175,7 +220,8 @@ void schedule(void)
cpu_enable_interrupt();
if (switch_ctx) {
kprintf("schedule: %p => %p \n", prev, next);
kprintf("schedule: %p (%p) => %p (%p) \n", prev,
prev->page_table, next, next->page_table);
aal_mc_load_page_table(next->page_table);
if (prev) {