78c86e5e56
Split __phys_addr out into its own file so we can disable -fstack-protector in a fine-grained fashion. Also it doesn't have terribly much to do with the rest of ioremap.c. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
#include <linux/mmdebug.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/page.h>
|
|
|
|
#include "physaddr.h"
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
unsigned long __phys_addr(unsigned long x)
|
|
{
|
|
if (x >= __START_KERNEL_map) {
|
|
x -= __START_KERNEL_map;
|
|
VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
|
|
x += phys_base;
|
|
} else {
|
|
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
|
|
x -= PAGE_OFFSET;
|
|
VIRTUAL_BUG_ON(!phys_addr_valid(x));
|
|
}
|
|
return x;
|
|
}
|
|
EXPORT_SYMBOL(__phys_addr);
|
|
|
|
bool __virt_addr_valid(unsigned long x)
|
|
{
|
|
if (x >= __START_KERNEL_map) {
|
|
x -= __START_KERNEL_map;
|
|
if (x >= KERNEL_IMAGE_SIZE)
|
|
return false;
|
|
x += phys_base;
|
|
} else {
|
|
if (x < PAGE_OFFSET)
|
|
return false;
|
|
x -= PAGE_OFFSET;
|
|
if (!phys_addr_valid(x))
|
|
return false;
|
|
}
|
|
|
|
return pfn_valid(x >> PAGE_SHIFT);
|
|
}
|
|
EXPORT_SYMBOL(__virt_addr_valid);
|
|
|
|
#else
|
|
|
|
#ifdef CONFIG_DEBUG_VIRTUAL
|
|
unsigned long __phys_addr(unsigned long x)
|
|
{
|
|
/* VMALLOC_* aren't constants */
|
|
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
|
|
VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
|
|
return x - PAGE_OFFSET;
|
|
}
|
|
EXPORT_SYMBOL(__phys_addr);
|
|
#endif
|
|
|
|
bool __virt_addr_valid(unsigned long x)
|
|
{
|
|
if (x < PAGE_OFFSET)
|
|
return false;
|
|
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
|
|
return false;
|
|
if (x >= FIXADDR_START)
|
|
return false;
|
|
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
|
|
}
|
|
EXPORT_SYMBOL(__virt_addr_valid);
|
|
|
|
#endif /* CONFIG_X86_64 */
|