uma_machdep.c revision 302408
180529Sdd/*- 280529Sdd * Copyright (c) 2003 The FreeBSD Project 380529Sdd * All rights reserved. 480529Sdd * 580529Sdd * Redistribution and use in source and binary forms, with or without 680529Sdd * modification, are permitted provided that the following conditions 780529Sdd * are met: 880529Sdd * 980529Sdd * 1. Redistributions of source code must retain the above copyright 1080529Sdd * notice, this list of conditions and the following disclaimer. 1180529Sdd * 2. Redistributions in binary form must reproduce the above copyright 1280529Sdd * notice, this list of conditions and the following disclaimer in the 1380529Sdd * documentation and/or other materials provided with the distribution. 1480529Sdd * 1580529Sdd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1680529Sdd * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1780529Sdd * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1880529Sdd * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1980529Sdd * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2080529Sdd * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2180529Sdd * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2280529Sdd * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2380529Sdd * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2480529Sdd * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2580529Sdd */ 2680529Sdd 2780529Sdd#include <sys/cdefs.h> 2880529Sdd__FBSDID("$FreeBSD: stable/11/sys/powerpc/powerpc/uma_machdep.c 295451 2016-02-09 20:22:35Z glebius $"); 2980529Sdd 3080529Sdd#include <sys/param.h> 3180529Sdd#include <sys/kernel.h> 3280529Sdd#include <sys/lock.h> 3380529Sdd#include <sys/malloc.h> 3480529Sdd#include <sys/mutex.h> 3580529Sdd#include <sys/systm.h> 3680529Sdd#include <sys/sysctl.h> 3780529Sdd#include <vm/vm.h> 3880529Sdd#include <vm/vm_page.h> 3980529Sdd#include <vm/vm_kern.h> 4080529Sdd#include <vm/vm_pageout.h> 4180529Sdd#include <vm/vm_extern.h> 4280529Sdd#include <vm/uma.h> 4380529Sdd#include <vm/uma.h> 4480529Sdd#include <vm/uma_int.h> 4580529Sdd#include <machine/md_var.h> 4680529Sdd#include <machine/vmparam.h> 4780529Sdd 4880529Sddstatic int hw_uma_mdpages; 4980529SddSYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0, 5080529Sdd "UMA MD pages in use"); 5180529Sdd 5280529Sddvoid * 5380529Sdduma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait) 5480529Sdd{ 5580529Sdd void *va; 5680529Sdd vm_paddr_t pa; 5780529Sdd vm_page_t m; 5880529Sdd int pflags; 5980529Sdd 6080529Sdd *flags = UMA_SLAB_PRIV; 6180529Sdd pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED; 6280529Sdd 6380529Sdd for (;;) { 6480529Sdd m = vm_page_alloc(NULL, 0, pflags | VM_ALLOC_NOOBJ); 6580529Sdd if (m == NULL) { 6680529Sdd if (wait & M_NOWAIT) 6780529Sdd return (NULL); 6880529Sdd VM_WAIT; 6980529Sdd } else 7080529Sdd break; 7180529Sdd } 7284212Sdillon 7384212Sdillon pa = VM_PAGE_TO_PHYS(m); 7480529Sdd 7580529Sdd /* On book-e sizeof(void *) < sizeof(vm_paddr_t) */ 7680529Sdd if ((vm_offset_t)pa != pa) 7780529Sdd return (NULL); 7880529Sdd 7980529Sdd va = (void *)(vm_offset_t)pa; 8080529Sdd 8180529Sdd if (!hw_direct_map) 8280529Sdd pmap_kenter((vm_offset_t)va, VM_PAGE_TO_PHYS(m)); 8380529Sdd 8480529Sdd if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0) 8580529Sdd bzero(va, PAGE_SIZE); 8680529Sdd atomic_add_int(&hw_uma_mdpages, 1); 8780529Sdd 8880529Sdd return (va); 8980529Sdd} 9080529Sdd 9180529Sddvoid 9280529Sdduma_small_free(void *mem, vm_size_t size, u_int8_t flags) 9380529Sdd{ 9480529Sdd vm_page_t m; 9580529Sdd 9680529Sdd if (!hw_direct_map) 9780529Sdd pmap_remove(kernel_pmap,(vm_offset_t)mem, 98160840Ssimon (vm_offset_t)mem + PAGE_SIZE); 99160840Ssimon 10080529Sdd m = PHYS_TO_VM_PAGE((vm_offset_t)mem); 10180529Sdd m->wire_count--; 10280529Sdd vm_page_free(m); 10380529Sdd atomic_subtract_int(&vm_cnt.v_wire_count, 1); 10480529Sdd atomic_subtract_int(&hw_uma_mdpages, 1); 10580529Sdd} 106160840Ssimon