LXR linux/arch/riscv/mm/physaddr.c

   1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <linux/types.h>
   4#include <linux/mmdebug.h>
   5#include <linux/mm.h>
   6#include <asm/page.h>
   7#include <asm/sections.h>
   8
   9phys_addr_t __virt_to_phys(unsigned long x)
  10{
  11        phys_addr_t y = x - PAGE_OFFSET;
  12
  13        /*
  14         * Boundary checking aginst the kernel linear mapping space.
  15         */
  16        WARN(y >= KERN_VIRT_SIZE,
  17             "virt_to_phys used for non-linear address: %pK (%pS)\n",
  18             (void *)x, (void *)x);
  19
  20        return __va_to_pa_nodebug(x);
  21}
  22EXPORT_SYMBOL(__virt_to_phys);
  23
  24phys_addr_t __phys_addr_symbol(unsigned long x)
  25{
  26        unsigned long kernel_start = kernel_map.virt_addr;
  27        unsigned long kernel_end = (unsigned long)_end;
  28
  29        /*
  30         * Boundary checking aginst the kernel image mapping.
  31         * __pa_symbol should only be used on kernel symbol addresses.
  32         */
  33        VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end);
  34
  35        return __va_to_pa_nodebug(x);
  36}
  37EXPORT_SYMBOL(__phys_addr_symbol);
  38