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support private mapped file

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This commit is contained in:
NAKAMURA Gou
2013-08-09 20:55:17 +09:00
parent 603ef85454
commit 27172ad413
17 changed files with 1392 additions and 133 deletions
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52
kernel/mem.c
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@ -68,12 +68,15 @@ void free_pages(void *va, int npages)
struct list_head *pendings = &cpu_local_var(pending_free_pages);
struct page *page;
page = phys_to_page(virt_to_phys(va));
if (!page) {
panic("free_pages:struct page not found");
}
if (page->mode != PM_NONE) {
panic("free_pages:not PM_NONE");
}
if (pendings->next != NULL) {
page = phys_to_page(virt_to_phys(va));
if (page->flags & PAGE_IN_LIST) {
panic("free_pages");
}
page->flags |= PAGE_IN_LIST;
page->mode = PM_PENDING_FREE;
page->count = npages;
list_add_tail(&page->list, pendings);
return;
@ -103,10 +106,10 @@ void finish_free_pages_pending(void)
}
list_for_each_entry_safe(page, next, pendings, list) {
if (!(page->flags & PAGE_IN_LIST)) {
panic("free_pending_pages");
if (page->mode != PM_PENDING_FREE) {
panic("free_pending_pages:not PM_PENDING_FREE");
}
page->flags &= ~PAGE_IN_LIST;
page->mode = PM_NONE;
list_del(&page->list);
ihk_pagealloc_free(pa_allocator, page_to_phys(page), page->count);
}
@ -192,11 +195,6 @@ static void unhandled_page_fault(struct process *proc, void *fault_addr, void *r
}
#endif
#if 0
panic("mem fault");
#endif
set_signal(SIGSEGV, regs);
check_signal(0, regs);
return;
}
@ -215,6 +213,13 @@ static void page_fault_handler(void *fault_addr, uint64_t reason, void *regs)
ihk_mc_get_processor_id(), fault_addr,
reason, regs, error);
unhandled_page_fault(proc, fault_addr, regs);
if (error == -ERANGE) {
set_signal(SIGBUS, regs);
}
else {
set_signal(SIGSEGV, regs);
}
check_signal(0, regs);
goto out;
}
@ -311,6 +316,27 @@ uintptr_t page_to_phys(struct page *page)
return phys;
}
int page_unmap(struct page *page)
{
dkprintf("page_unmap(%p %x %d)\n", page, page->mode, page->count);
if (page->mode != PM_MAPPED) {
return 1;
}
if (--page->count > 0) {
/* other mapping exist */
dkprintf("page_unmap(%p %x %d): 0\n",
page, page->mode, page->count);
return 0;
}
/* no mapping exist */
list_del(&page->list);
page->mode = PM_NONE;
dkprintf("page_unmap(%p %x %d): 1\n", page, page->mode, page->count);
return 1;
}
static void page_init(void)
{
size_t npages;