diff options
Diffstat (limited to 'kexec/arch/arm/phys_to_virt.c')
-rw-r--r-- | kexec/arch/arm/phys_to_virt.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/kexec/arch/arm/phys_to_virt.c b/kexec/arch/arm/phys_to_virt.c new file mode 100644 index 0000000..46a4f68 --- /dev/null +++ b/kexec/arch/arm/phys_to_virt.c @@ -0,0 +1,22 @@ +#include "../../kexec.h" +#include "../../crashdump.h" +#include "phys_to_virt.h" + +uint64_t phys_offset; + +/** + * phys_to_virt() - translate physical address to virtual address + * @paddr: physical address to translate + * + * For ARM we have following equation to translate from virtual address to + * physical: + * paddr = vaddr - PAGE_OFFSET + PHYS_OFFSET + * + * See also: + * http://lists.arm.linux.org.uk/lurker/message/20010723.185051.94ce743c.en.html + */ +unsigned long +phys_to_virt(struct crash_elf_info *elf_info, unsigned long long paddr) +{ + return paddr + elf_info->page_offset - phys_offset; +} |