2 * Copyright (C) 2002 Benno Rice
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * Copyright (C) 1993 Wolfgang Solfrank.
27 * Copyright (C) 1993 TooLs GmbH.
28 * All rights reserved.
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
33 * 1. Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * 2. Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in the
37 * documentation and/or other materials provided with the distribution.
38 * 3. All advertising materials mentioning features or use of this software
39 * must display the following acknowledgement:
40 * This product includes software developed by TooLs GmbH.
41 * 4. The name of TooLs GmbH may not be used to endorse or promote products
42 * derived from this software without specific prior written permission.
44 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 #include <sys/cdefs.h>
57 __FBSDID("$FreeBSD$");
59 #include <sys/param.h>
61 #include <sys/mutex.h>
62 #include <sys/systm.h>
67 #include <vm/vm_map.h>
69 #include <machine/pcb.h>
70 #include <machine/sr.h>
71 #include <machine/slb.h>
72 #include <machine/vmparam.h>
74 int setfault(faultbuf); /* defined in locore.S */
78 * Makes sure that the right segment of userspace is mapped in.
83 set_user_sr(pmap_t pm, const void *addr)
88 /* Try lockless look-up first */
89 slb = user_va_to_slb_entry(pm, (vm_offset_t)addr);
92 /* If it isn't there, we need to pre-fault the VSID */
94 slbv = va_to_vsid(pm, (vm_offset_t)addr) << SLBV_VSID_SHIFT;
100 /* Mark segment no-execute */
103 /* If we have already set this VSID, we can just return */
104 if (curthread->td_pcb->pcb_cpu.aim.usr_vsid == slbv)
107 __asm __volatile("isync");
108 curthread->td_pcb->pcb_cpu.aim.usr_segm =
109 (uintptr_t)addr >> ADDR_SR_SHFT;
110 curthread->td_pcb->pcb_cpu.aim.usr_vsid = slbv;
111 __asm __volatile ("slbie %0; slbmte %1, %2; isync" ::
112 "r"(USER_ADDR), "r"(slbv), "r"(USER_SLB_SLBE));
116 set_user_sr(pmap_t pm, const void *addr)
120 vsid = va_to_vsid(pm, (vm_offset_t)addr);
122 /* Mark segment no-execute */
125 /* If we have already set this VSID, we can just return */
126 if (curthread->td_pcb->pcb_cpu.aim.usr_vsid == vsid)
129 __asm __volatile("isync");
130 curthread->td_pcb->pcb_cpu.aim.usr_segm =
131 (uintptr_t)addr >> ADDR_SR_SHFT;
132 curthread->td_pcb->pcb_cpu.aim.usr_vsid = vsid;
133 __asm __volatile("mtsr %0,%1; isync" :: "n"(USER_SR), "r"(vsid));
138 map_user_ptr(pmap_t pm, const void *uaddr, void **kaddr, size_t ulen,
143 *kaddr = (char *)USER_ADDR + ((uintptr_t)uaddr & ~SEGMENT_MASK);
145 l = ((char *)USER_ADDR + SEGMENT_LENGTH) - (char *)(*kaddr);
153 set_user_sr(pm, uaddr);
157 #else /* Book-E uses a combined kernel/user mapping */
159 map_user_ptr(pmap_t pm, const void *uaddr, void **kaddr, size_t ulen,
163 if ((uintptr_t)uaddr + ulen > VM_MAXUSER_ADDRESS + PAGE_SIZE)
166 *kaddr = (void *)(uintptr_t)uaddr;
175 copyout(const void *kaddr, void *udaddr, size_t len)
185 pm = &td->td_proc->p_vmspace->vm_pmap;
188 td->td_pcb->pcb_onfault = NULL;
196 if (map_user_ptr(pm, udaddr, (void **)&p, len, &l)) {
197 td->td_pcb->pcb_onfault = NULL;
208 td->td_pcb->pcb_onfault = NULL;
213 copyin(const void *udaddr, void *kaddr, size_t len)
223 pm = &td->td_proc->p_vmspace->vm_pmap;
226 td->td_pcb->pcb_onfault = NULL;
234 if (map_user_ptr(pm, udaddr, (void **)&p, len, &l)) {
235 td->td_pcb->pcb_onfault = NULL;
246 td->td_pcb->pcb_onfault = NULL;
251 copyinstr(const void *udaddr, void *kaddr, size_t len, size_t *done)
262 pm = &td->td_proc->p_vmspace->vm_pmap;
265 td->td_pcb->pcb_onfault = NULL;
274 for (l = 0; len-- > 0; l++) {
275 if ((c = fubyte(up++)) < 0) {
291 td->td_pcb->pcb_onfault = NULL;
296 subyte(void *addr, int byte)
304 pm = &td->td_proc->p_vmspace->vm_pmap;
307 td->td_pcb->pcb_onfault = NULL;
311 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
312 td->td_pcb->pcb_onfault = NULL;
318 td->td_pcb->pcb_onfault = NULL;
324 suword32(void *addr, int word)
332 pm = &td->td_proc->p_vmspace->vm_pmap;
335 td->td_pcb->pcb_onfault = NULL;
339 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
340 td->td_pcb->pcb_onfault = NULL;
346 td->td_pcb->pcb_onfault = NULL;
352 suword(void *addr, long word)
360 pm = &td->td_proc->p_vmspace->vm_pmap;
363 td->td_pcb->pcb_onfault = NULL;
367 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
368 td->td_pcb->pcb_onfault = NULL;
374 td->td_pcb->pcb_onfault = NULL;
380 suword64(void *addr, int64_t word)
382 return (suword(addr, (long)word));
386 suword32(void *addr, int32_t word)
388 return (suword(addr, (long)word));
393 fubyte(const void *addr)
402 pm = &td->td_proc->p_vmspace->vm_pmap;
405 td->td_pcb->pcb_onfault = NULL;
409 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
410 td->td_pcb->pcb_onfault = NULL;
416 td->td_pcb->pcb_onfault = NULL;
422 fuword32(const void *addr)
430 pm = &td->td_proc->p_vmspace->vm_pmap;
433 td->td_pcb->pcb_onfault = NULL;
437 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
438 td->td_pcb->pcb_onfault = NULL;
444 td->td_pcb->pcb_onfault = NULL;
450 fuword(const void *addr)
458 pm = &td->td_proc->p_vmspace->vm_pmap;
461 td->td_pcb->pcb_onfault = NULL;
465 if (map_user_ptr(pm, addr, (void **)&p, sizeof(*p), NULL)) {
466 td->td_pcb->pcb_onfault = NULL;
472 td->td_pcb->pcb_onfault = NULL;
476 #ifndef __powerpc64__
478 fuword32(const void *addr)
480 return ((int32_t)fuword(addr));
485 casuword32(volatile uint32_t *addr, uint32_t old, uint32_t new)
493 pm = &td->td_proc->p_vmspace->vm_pmap;
496 td->td_pcb->pcb_onfault = NULL;
500 if (map_user_ptr(pm, (void *)(uintptr_t)addr, (void **)&p, sizeof(*p),
502 td->td_pcb->pcb_onfault = NULL;
507 "1:\tlwarx %0, 0, %2\n\t" /* load old value */
508 "cmplw %3, %0\n\t" /* compare */
509 "bne 2f\n\t" /* exit if not equal */
510 "stwcx. %4, 0, %2\n\t" /* attempt to store */
511 "bne- 1b\n\t" /* spin if failed */
512 "b 3f\n\t" /* we've succeeded */
514 "stwcx. %0, 0, %2\n\t" /* clear reservation (74xx) */
516 : "=&r" (val), "=m" (*p)
517 : "r" (p), "r" (old), "r" (new), "m" (*p)
520 td->td_pcb->pcb_onfault = NULL;
525 #ifndef __powerpc64__
527 casuword(volatile u_long *addr, u_long old, u_long new)
529 return (casuword32((volatile uint32_t *)addr, old, new));
533 casuword(volatile u_long *addr, u_long old, u_long new)
541 pm = &td->td_proc->p_vmspace->vm_pmap;
544 td->td_pcb->pcb_onfault = NULL;
548 if (map_user_ptr(pm, (void *)(uintptr_t)addr, (void **)&p, sizeof(*p),
550 td->td_pcb->pcb_onfault = NULL;
555 "1:\tldarx %0, 0, %2\n\t" /* load old value */
556 "cmpld %3, %0\n\t" /* compare */
557 "bne 2f\n\t" /* exit if not equal */
558 "stdcx. %4, 0, %2\n\t" /* attempt to store */
559 "bne- 1b\n\t" /* spin if failed */
560 "b 3f\n\t" /* we've succeeded */
562 "stdcx. %0, 0, %2\n\t" /* clear reservation (74xx) */
564 : "=&r" (val), "=m" (*p)
565 : "r" (p), "r" (old), "r" (new), "m" (*p)
568 td->td_pcb->pcb_onfault = NULL;