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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/syscons/dragon/@/powerpc/booke/copyinout.c |
/*-
* Copyright (C) 2002 Benno Rice
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (C) 1993 Wolfgang Solfrank.
* Copyright (C) 1993 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/powerpc/booke/copyinout.c 223485 2011-06-23 22:21:28Z nwhitehorn $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <machine/pcb.h>
#include <machine/vmparam.h>
int setfault(faultbuf); /* defined in locore.S */
static int
is_uaddr(const void *addr)
{
int rv = ((vm_offset_t)addr <= VM_MAXUSER_ADDRESS) ? 1 : 0;
return rv;
}
int
copyout(const void *kaddr, void *udaddr, size_t len)
{
struct thread *td;
faultbuf env;
if (!is_uaddr(udaddr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
bcopy(kaddr, udaddr, len);
td->td_pcb->pcb_onfault = NULL;
return (0);
}
int
copyin(const void *udaddr, void *kaddr, size_t len)
{
struct thread *td;
faultbuf env;
if (!is_uaddr(udaddr) || is_uaddr(kaddr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
bcopy(udaddr, kaddr, len);
td->td_pcb->pcb_onfault = NULL;
return (0);
}
int
copyinstr(const void *udaddr, void *kaddr, size_t len, size_t *done)
{
struct thread *td;
faultbuf env;
const char *up;
char *kp;
size_t l;
int rv, c;
if (!is_uaddr(udaddr) || is_uaddr(kaddr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
kp = kaddr;
up = udaddr;
rv = ENAMETOOLONG;
for (l = 0; len-- > 0; l++) {
c = *up++;
if (!(*kp++ = c)) {
l++;
rv = 0;
break;
}
}
if (done != NULL) {
*done = l;
}
td->td_pcb->pcb_onfault = NULL;
return (rv);
}
int
subyte(void *addr, int byte)
{
struct thread *td;
faultbuf env;
if (!is_uaddr(addr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
*(char *)addr = (char)byte;
td->td_pcb->pcb_onfault = NULL;
return (0);
}
int
suword(void *addr, long word)
{
struct thread *td;
faultbuf env;
if (!is_uaddr(addr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
*(long *)addr = word;
td->td_pcb->pcb_onfault = NULL;
return (0);
}
int
suword32(void *addr, int32_t word)
{
return (suword(addr, (long)word));
}
int
fubyte(const void *addr)
{
struct thread *td;
faultbuf env;
int val;
if (!is_uaddr(addr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
val = *(const u_char *)addr;
td->td_pcb->pcb_onfault = NULL;
return (val);
}
long
fuword(const void *addr)
{
struct thread *td;
faultbuf env;
long val;
if (!is_uaddr(addr))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
val = *(const long *)addr;
td->td_pcb->pcb_onfault = NULL;
return (val);
}
int32_t
fuword32(const void *addr)
{
return ((int32_t)fuword(addr));
}
uint32_t
casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval)
{
return (casuword((volatile u_long *)base, oldval, newval));
}
u_long
casuword(volatile u_long *addr, u_long old, u_long new)
{
struct thread *td;
faultbuf env;
u_long val;
if (!((vm_offset_t)addr <= VM_MAXUSER_ADDRESS))
return (EFAULT);
td = curthread;
if (setfault(env)) {
td->td_pcb->pcb_onfault = NULL;
return (EFAULT);
}
__asm __volatile (
"1:\tlwarx %0, 0, %2\n\t" /* load old value */
"cmplw %3, %0\n\t" /* compare */
"bne 2f\n\t" /* exit if not equal */
"stwcx. %4, 0, %2\n\t" /* attempt to store */
"bne- 1b\n\t" /* spin if failed */
"b 3f\n\t" /* we've succeeded */
"2:\n\t"
"stwcx. %0, 0, %2\n\t" /* clear reservation (74xx) */
"3:\n\t"
: "=&r" (val), "=m" (*addr)
: "r" (addr), "r" (old), "r" (new), "m" (*addr)
: "cc", "memory");
td->td_pcb->pcb_onfault = NULL;
return (val);
}