1#ifndef _ASM_FIXMAP_H
 2#define _ASM_FIXMAP_H
 3
 4/*
 5 * Nothing too fancy for now.
 6 *
 7 * On ARM we already have well known fixed virtual addresses imposed by
 8 * the architecture such as the vector page which is located at 0xffff0000,
 9 * therefore a second level page table is already allocated covering
10 * 0xfff00000 upwards.
11 *
12 * The cache flushing code in proc-xscale.S uses the virtual area between
13 * 0xfffe0000 and 0xfffeffff.
14 */
15
16#define FIXADDR_START		0xfff00000UL
17#define FIXADDR_TOP		0xfffe0000UL
18#define FIXADDR_SIZE		(FIXADDR_TOP - FIXADDR_START)
19
20#define FIX_KMAP_BEGIN		0
21#define FIX_KMAP_END		(FIXADDR_SIZE >> PAGE_SHIFT)
22
23#define __fix_to_virt(x)	(FIXADDR_START + ((x) << PAGE_SHIFT))
24#define __virt_to_fix(x)	(((x) - FIXADDR_START) >> PAGE_SHIFT)
25
26extern void __this_fixmap_does_not_exist(void);
27
28static inline unsigned long fix_to_virt(const unsigned int idx)
29{
30	if (idx >= FIX_KMAP_END)
31		__this_fixmap_does_not_exist();
32	return __fix_to_virt(idx);
33}
34
35static inline unsigned int virt_to_fix(const unsigned long vaddr)
36{
37	BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
38	return __virt_to_fix(vaddr);
39}
40
41#endif

 1#ifndef _ASM_FIXMAP_H
 2#define _ASM_FIXMAP_H
 3
 4/*
 5 * Nothing too fancy for now.
 6 *
 7 * On ARM we already have well known fixed virtual addresses imposed by
 8 * the architecture such as the vector page which is located at 0xffff0000,
 9 * therefore a second level page table is already allocated covering
10 * 0xfff00000 upwards.
11 *
12 * The cache flushing code in proc-xscale.S uses the virtual area between
13 * 0xfffe0000 and 0xfffeffff.
14 */
15
16#define FIXADDR_START		0xfff00000UL
17#define FIXADDR_TOP		0xfffe0000UL
18#define FIXADDR_SIZE		(FIXADDR_TOP - FIXADDR_START)
19
20#define FIX_KMAP_BEGIN		0
21#define FIX_KMAP_END		(FIXADDR_SIZE >> PAGE_SHIFT)
22
23#define __fix_to_virt(x)	(FIXADDR_START + ((x) << PAGE_SHIFT))
24#define __virt_to_fix(x)	(((x) - FIXADDR_START) >> PAGE_SHIFT)
25
26extern void __this_fixmap_does_not_exist(void);
27
28static inline unsigned long fix_to_virt(const unsigned int idx)
29{
30	if (idx >= FIX_KMAP_END)
31		__this_fixmap_does_not_exist();
32	return __fix_to_virt(idx);
33}
34
35static inline unsigned int virt_to_fix(const unsigned long vaddr)
36{
37	BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
38	return __virt_to_fix(vaddr);
39}
40
41#endif