tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_FIXMAP_H
2#define _ASM_FIXMAP_H
3
4#define FIXADDR_START 0xffc00000UL
5#define FIXADDR_TOP 0xffe00000UL
6#define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START)
7
8#define FIX_KMAP_NR_PTES (FIXADDR_SIZE >> PAGE_SHIFT)
9
10#define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT))
11#define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT)
12
13extern void __this_fixmap_does_not_exist(void);
14
15static inline unsigned long fix_to_virt(const unsigned int idx)
16{
17 if (idx >= FIX_KMAP_NR_PTES)
18 __this_fixmap_does_not_exist();
19 return __fix_to_virt(idx);
20}
21
22static inline unsigned int virt_to_fix(const unsigned long vaddr)
23{
24 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
25 return __virt_to_fix(vaddr);
26}
27
28#endif