mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
658e2c5125
We have a lot of variables that are used to hold kernel mapping addresses, offsets between physical and virtual mappings and some others used for XIP kernels: they are all defined at different places in mm/init.c, so group them into a single structure with, for some of them, more explicit and concise names. Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
38 lines
899 B
C
38 lines
899 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/mmdebug.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/page.h>
|
|
#include <asm/sections.h>
|
|
|
|
phys_addr_t __virt_to_phys(unsigned long x)
|
|
{
|
|
phys_addr_t y = x - PAGE_OFFSET;
|
|
|
|
/*
|
|
* Boundary checking aginst the kernel linear mapping space.
|
|
*/
|
|
WARN(y >= KERN_VIRT_SIZE,
|
|
"virt_to_phys used for non-linear address: %pK (%pS)\n",
|
|
(void *)x, (void *)x);
|
|
|
|
return __va_to_pa_nodebug(x);
|
|
}
|
|
EXPORT_SYMBOL(__virt_to_phys);
|
|
|
|
phys_addr_t __phys_addr_symbol(unsigned long x)
|
|
{
|
|
unsigned long kernel_start = kernel_map.virt_addr;
|
|
unsigned long kernel_end = (unsigned long)_end;
|
|
|
|
/*
|
|
* Boundary checking aginst the kernel image mapping.
|
|
* __pa_symbol should only be used on kernel symbol addresses.
|
|
*/
|
|
VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end);
|
|
|
|
return __va_to_pa_nodebug(x);
|
|
}
|
|
EXPORT_SYMBOL(__phys_addr_symbol);
|