51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/bug.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/mmdebug.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
|
||
|
|
#include <asm/addrspace.h>
|
||
|
|
#include <asm/sections.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
#include <asm/dma.h>
|
||
|
|
|
||
|
|
static inline bool __debug_virt_addr_valid(unsigned long x)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* MAX_DMA_ADDRESS is a virtual address that may not correspond to an
|
||
|
|
* actual physical address. Enough code relies on
|
||
|
|
* virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it
|
||
|
|
* and always return true.
|
||
|
|
*/
|
||
|
|
if (x == MAX_DMA_ADDRESS)
|
||
|
|
return true;
|
||
|
|
|
||
|
|
return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 ||
|
||
|
|
IS_ENABLED(CONFIG_EVA) ||
|
||
|
|
!IS_ENABLED(CONFIG_HIGHMEM));
|
||
|
|
}
|
||
|
|
|
||
|
|
phys_addr_t __virt_to_phys(volatile const void *x)
|
||
|
|
{
|
||
|
|
WARN(!__debug_virt_addr_valid((unsigned long)x),
|
||
|
|
"virt_to_phys used for non-linear address: %pK (%pS)\n",
|
||
|
|
x, x);
|
||
|
|
|
||
|
|
return __virt_to_phys_nodebug(x);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__virt_to_phys);
|
||
|
|
|
||
|
|
phys_addr_t __phys_addr_symbol(unsigned long x)
|
||
|
|
{
|
||
|
|
/* This is bounds checking against the kernel image only.
|
||
|
|
* __pa_symbol should only be used on kernel symbol addresses.
|
||
|
|
*/
|
||
|
|
VIRTUAL_BUG_ON(x < (unsigned long)_text ||
|
||
|
|
x > (unsigned long)_end);
|
||
|
|
|
||
|
|
return __pa_symbol_nodebug(x);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__phys_addr_symbol);
|