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author | alc <alc@FreeBSD.org> | 2003-06-14 23:23:55 +0000 |
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committer | alc <alc@FreeBSD.org> | 2003-06-14 23:23:55 +0000 |
commit | 83f108b04dd3280195b5f0cf6bc2af10630e5f75 (patch) | |
tree | 5b005cceb283a32d0b4cb30493fc1a788fe8a46b /sys/powerpc/aim | |
parent | cf4a22224f432bfbaaa9bceff6eee597501588ef (diff) | |
download | FreeBSD-src-83f108b04dd3280195b5f0cf6bc2af10630e5f75.zip FreeBSD-src-83f108b04dd3280195b5f0cf6bc2af10630e5f75.tar.gz |
Migrate the thread stack management functions from the machine-dependent
to the machine-independent parts of the VM. At the same time, this
introduces vm object locking for the non-i386 platforms.
Two details:
1. KSTACK_GUARD has been removed in favor of KSTACK_GUARD_PAGES. The
different machine-dependent implementations used various combinations
of KSTACK_GUARD and KSTACK_GUARD_PAGES. To disable guard page, set
KSTACK_GUARD_PAGES to 0.
2. Remove the (unnecessary) clearing of PG_ZERO in vm_thread_new. In
5.x, (but not 4.x,) PG_ZERO can only be set if VM_ALLOC_ZERO is passed
to vm_page_alloc() or vm_page_grab().
Diffstat (limited to 'sys/powerpc/aim')
-rw-r--r-- | sys/powerpc/aim/mmu_oea.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/sys/powerpc/aim/mmu_oea.c b/sys/powerpc/aim/mmu_oea.c index 4808b4d..ef84865 100644 --- a/sys/powerpc/aim/mmu_oea.c +++ b/sys/powerpc/aim/mmu_oea.c @@ -1556,159 +1556,6 @@ pmap_remove_pages(pmap_t pm, vm_offset_t sva, vm_offset_t eva) pmap_remove(pm, sva, eva); } -#ifndef KSTACK_MAX_PAGES -#define KSTACK_MAX_PAGES 32 -#endif - -/* - * Create the kernel stack and pcb for a new thread. - * This routine directly affects the fork perf for a process and - * create performance for a thread. - */ -void -pmap_new_thread(struct thread *td, int pages) -{ - vm_page_t ma[KSTACK_MAX_PAGES]; - vm_object_t ksobj; - vm_offset_t ks; - vm_page_t m; - u_int i; - - /* Bounds check */ - if (pages <= 1) - pages = KSTACK_PAGES; - else if (pages > KSTACK_MAX_PAGES) - pages = KSTACK_MAX_PAGES; - - /* - * Allocate object for the kstack. - */ - ksobj = vm_object_allocate(OBJT_DEFAULT, pages); - td->td_kstack_obj = ksobj; - - /* - * Get a kernel virtual address for the kstack for this thread. - */ - ks = kmem_alloc_nofault(kernel_map, - (pages + KSTACK_GUARD_PAGES) * PAGE_SIZE); - if (ks == 0) - panic("pmap_new_thread: kstack allocation failed"); - TLBIE(ks); - ks += KSTACK_GUARD_PAGES * PAGE_SIZE; - td->td_kstack = ks; - - /* - * Knowing the number of pages allocated is useful when you - * want to deallocate them. - */ - td->td_kstack_pages = pages; - - for (i = 0; i < pages; i++) { - /* - * Get a kernel stack page. - */ - m = vm_page_grab(ksobj, i, - VM_ALLOC_NORMAL | VM_ALLOC_RETRY | VM_ALLOC_WIRED); - ma[i] = m; - - vm_page_lock_queues(); - vm_page_wakeup(m); - vm_page_flag_clear(m, PG_ZERO); - m->valid = VM_PAGE_BITS_ALL; - vm_page_unlock_queues(); - } - - /* - * Enter the page into the kernel address space - */ - pmap_qenter(ks, ma, pages); -} - -void -pmap_dispose_thread(struct thread *td) -{ - vm_object_t ksobj; - vm_offset_t ks; - vm_page_t m; - int i; - int pages; - - pages = td->td_kstack_pages; - ksobj = td->td_kstack_obj; - ks = td->td_kstack; - for (i = 0; i < pages ; i++) { - m = vm_page_lookup(ksobj, i); - if (m == NULL) - panic("pmap_dispose_thread: kstack already missing?"); - vm_page_lock_queues(); - vm_page_busy(m); - vm_page_unwire(m, 0); - vm_page_free(m); - vm_page_unlock_queues(); - } - pmap_qremove(ks, pages); - kmem_free(kernel_map, ks - (KSTACK_GUARD_PAGES * PAGE_SIZE), - (pages + KSTACK_GUARD_PAGES) * PAGE_SIZE); - vm_object_deallocate(ksobj); -} - -void -pmap_swapin_thread(struct thread *td) -{ - vm_page_t ma[KSTACK_MAX_PAGES]; - vm_object_t ksobj; - vm_offset_t ks; - vm_page_t m; - int rv; - int i; - int pages; - - pages = td->td_kstack_pages; - ksobj = td->td_kstack_obj; - ks = td->td_kstack; - for (i = 0; i < pages; i++) { - m = vm_page_grab(ksobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); - if (m->valid != VM_PAGE_BITS_ALL) { - rv = vm_pager_get_pages(ksobj, &m, 1, 0); - if (rv != VM_PAGER_OK) - panic("pmap_swapin_thread: cannot get kstack"); - m = vm_page_lookup(ksobj, i); - m->valid = VM_PAGE_BITS_ALL; - } - ma[i] = m; - vm_page_lock_queues(); - vm_page_wire(m); - vm_page_wakeup(m); - vm_page_unlock_queues(); - } - pmap_qenter(ks, ma, pages); -} - - -void -pmap_swapout_thread(struct thread *td) -{ - vm_object_t ksobj; - vm_offset_t ks; - vm_page_t m; - int i; - int pages; - - pages = td->td_kstack_pages; - ksobj = td->td_kstack_obj; - ks = (vm_offset_t)td->td_kstack; - for (i = 0; i < pages; i++) { - m = vm_page_lookup(ksobj, i); - if (m == NULL) - panic("pmap_swapout_thread: kstack already missing?"); - vm_page_lock_queues(); - vm_page_dirty(m); - vm_page_unwire(m, 0); - vm_page_unlock_queues(); - } - pmap_qremove(ks, pages); -} - /* * Allocate a physical page of memory directly from the phys_avail map. * Can only be called from pmap_bootstrap before avail start and end are |