/*
- * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*-
#include <mach/vm_types.h>
#include <mach/vm_param.h>
-#include <vm/vm_kern.h> /* for kernel_map */
+#include <vm/vm_kern.h> /* for kernel_map */
-#include <pexpert/pexpert.h> /* for PE_parse_boot_argn */
+#include <pexpert/pexpert.h> /* for PE_parse_boot_argn */
boolean_t iskmemdev(dev_t dev);
void dev_kmem_init(void);
#if defined(__x86_64__)
-extern addr64_t kvtophys(vm_offset_t va);
+extern addr64_t kvtophys(vm_offset_t va);
#else
#error need kvtophys prototype
#endif
int
mmread(dev_t dev, struct uio *uio)
{
- return (mmrw(dev, uio, UIO_READ));
+ return mmrw(dev, uio, UIO_READ);
}
int
mmwrite(dev_t dev, struct uio *uio)
{
- return (mmrw(dev, uio, UIO_WRITE));
+ return mmrw(dev, uio, UIO_WRITE);
}
int
-mmioctl(dev_t dev, u_long cmd, __unused caddr_t data,
- __unused int flag, __unused struct proc *p)
+mmioctl(dev_t dev, u_long cmd, __unused caddr_t data,
+ __unused int flag, __unused struct proc *p)
{
int minnum = minor(dev);
if (0 == minnum || 1 == minnum) {
/* /dev/mem and /dev/kmem */
#if CONFIG_DEV_KMEM
- if (!dev_kmem_enabled)
- return (ENODEV);
+ if (!dev_kmem_enabled) {
+ return ENODEV;
+ }
#else
- return (ENODEV);
+ return ENODEV;
#endif
}
return ENODEV;
}
- return (0);
+ return 0;
}
int
mmrw(dev_t dev, struct uio *uio, enum uio_rw rw)
{
- unsigned int c;
+ user_size_t c;
int error = 0;
while (uio_resid(uio) > 0) {
uio_update(uio, 0);
switch (minor(dev)) {
-
/* minor device 0 is physical memory */
case 0:
- return (ENODEV);
+ return ENODEV;
/* minor device 1 is kernel memory */
case 1:
#if !CONFIG_DEV_KMEM
- return (ENODEV);
+ return ENODEV;
#else /* CONFIG_DEV_KMEM */
- if (!dev_kmem_enabled)
- return (ENODEV);
+ if (!dev_kmem_enabled) {
+ return ENODEV;
+ }
vm_address_t kaddr = (vm_address_t)uio->uio_offset;
if (dev_kmem_mask_top_bit) {
const vm_address_t top_bit = (~((vm_address_t)0)) ^ (~((vm_address_t)0) >> 1UL);
if (kaddr & top_bit) {
/* top bit should not be set already */
- return (EFAULT);
+ return EFAULT;
}
kaddr |= top_bit;
}
/* Do some sanity checking */
if ((kaddr > (VM_MAX_KERNEL_ADDRESS - c)) ||
- (kaddr <= VM_MIN_KERNEL_AND_KEXT_ADDRESS))
+ (kaddr <= VM_MIN_KERNEL_AND_KEXT_ADDRESS)) {
goto fault;
- if (!kernacc(kaddr, c))
+ }
+ if (!kernacc(kaddr, c)) {
goto fault;
+ }
error = uiomove((const char *)(uintptr_t)kaddr,
- (int)c, uio);
- if (error)
+ (int)c, uio);
+ if (error) {
break;
+ }
continue; /* Keep going until UIO is done */
#endif /* CONFIG_DEV_KMEM */
/* minor device 2 is EOF/RATHOLE */
case 2:
- if (rw == UIO_READ)
- return (0);
+ if (rw == UIO_READ) {
+ return 0;
+ }
c = uio_curriovlen(uio);
error = 0; /* Always succeeds, always consumes all input */
break;
case 3:
- if(devzerobuf == NULL) {
- MALLOC(devzerobuf, caddr_t,PAGE_SIZE, M_TEMP, M_WAITOK);
+ if (devzerobuf == NULL) {
+ MALLOC(devzerobuf, caddr_t, PAGE_SIZE, M_TEMP, M_WAITOK);
bzero(devzerobuf, PAGE_SIZE);
}
- if(uio->uio_rw == UIO_WRITE) {
+ if (uio->uio_rw == UIO_WRITE) {
c = uio_curriovlen(uio);
error = 0; /* Always succeeds, always consumes all input */
break;
}
- c = min(uio_curriovlen(uio), PAGE_SIZE);
+ c = MIN(uio_curriovlen(uio), PAGE_SIZE);
error = uiomove(devzerobuf, (int)c, uio);
- if (error)
+ if (error) {
break;
+ }
continue; /* Keep going until UIO is done */
default:
- return (ENODEV);
- break;
+ return ENODEV;
}
-
- if (error)
+
+ if (error) {
break;
+ }
uio_update(uio, c);
}
- return (error);
+ return error;
#if CONFIG_DEV_KMEM
fault:
- return (EFAULT);
+ return EFAULT;
#endif
}
#if CONFIG_DEV_KMEM
-void dev_kmem_init(void)
+void
+dev_kmem_init(void)
{
uint32_t kmem;
- if (PE_parse_boot_argn("kmem", &kmem, sizeof (kmem))) {
+ if (PE_i_can_has_debugger(NULL) &&
+ PE_parse_boot_argn("kmem", &kmem, sizeof(kmem))) {
if (kmem & 0x1) {
dev_kmem_enabled = TRUE;
}
boolean_t
kernacc(
- off_t start,
- size_t len
-)
+ off_t start,
+ size_t len
+ )
{
off_t base;
off_t end;
-
+
base = trunc_page(start);
end = start + len;
-
+
while (base < end) {
- if(kvtophys((vm_offset_t)base) == 0ULL)
- return(FALSE);
+ if (kvtophys((vm_offset_t)base) == 0ULL) {
+ return FALSE;
+ }
base += page_size;
- }
+ }
- return (TRUE);
+ return TRUE;
}
#endif /* CONFIG_DEV_KMEM */
/*
* Returns true if dev is /dev/mem or /dev/kmem.
*/
-boolean_t iskmemdev(dev_t dev)
+boolean_t
+iskmemdev(dev_t dev)
{
- return (major(dev) == 3 && minor(dev) < 2);
+ return major(dev) == 3 && minor(dev) < 2;
}
projects / apple / xnu.git / blobdiff