ia64/linux-2.6.18-xen.hg

view include/asm-m68k/cacheflush.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 #ifndef _M68K_CACHEFLUSH_H
2 #define _M68K_CACHEFLUSH_H
4 #include <linux/mm.h>
6 /* cache code */
7 #define FLUSH_I_AND_D (0x00000808)
8 #define FLUSH_I (0x00000008)
10 /*
11 * Cache handling functions
12 */
14 static inline void flush_icache(void)
15 {
16 if (CPU_IS_040_OR_060)
17 asm volatile ( "nop\n"
18 " .chip 68040\n"
19 " cpusha %bc\n"
20 " .chip 68k");
21 else {
22 unsigned long tmp;
23 asm volatile ( "movec %%cacr,%0\n"
24 " or.w %1,%0\n"
25 " movec %0,%%cacr"
26 : "=&d" (tmp)
27 : "id" (FLUSH_I));
28 }
29 }
31 /*
32 * invalidate the cache for the specified memory range.
33 * It starts at the physical address specified for
34 * the given number of bytes.
35 */
36 extern void cache_clear(unsigned long paddr, int len);
37 /*
38 * push any dirty cache in the specified memory range.
39 * It starts at the physical address specified for
40 * the given number of bytes.
41 */
42 extern void cache_push(unsigned long paddr, int len);
44 /*
45 * push and invalidate pages in the specified user virtual
46 * memory range.
47 */
48 extern void cache_push_v(unsigned long vaddr, int len);
50 /* This is needed whenever the virtual mapping of the current
51 process changes. */
52 #define __flush_cache_all() \
53 ({ \
54 if (CPU_IS_040_OR_060) \
55 __asm__ __volatile__("nop\n\t" \
56 ".chip 68040\n\t" \
57 "cpusha %dc\n\t" \
58 ".chip 68k"); \
59 else { \
60 unsigned long _tmp; \
61 __asm__ __volatile__("movec %%cacr,%0\n\t" \
62 "orw %1,%0\n\t" \
63 "movec %0,%%cacr" \
64 : "=&d" (_tmp) \
65 : "di" (FLUSH_I_AND_D)); \
66 } \
67 })
69 #define __flush_cache_030() \
70 ({ \
71 if (CPU_IS_020_OR_030) { \
72 unsigned long _tmp; \
73 __asm__ __volatile__("movec %%cacr,%0\n\t" \
74 "orw %1,%0\n\t" \
75 "movec %0,%%cacr" \
76 : "=&d" (_tmp) \
77 : "di" (FLUSH_I_AND_D)); \
78 } \
79 })
81 #define flush_cache_all() __flush_cache_all()
83 #define flush_cache_vmap(start, end) flush_cache_all()
84 #define flush_cache_vunmap(start, end) flush_cache_all()
86 static inline void flush_cache_mm(struct mm_struct *mm)
87 {
88 if (mm == current->mm)
89 __flush_cache_030();
90 }
92 /* flush_cache_range/flush_cache_page must be macros to avoid
93 a dependency on linux/mm.h, which includes this file... */
94 static inline void flush_cache_range(struct vm_area_struct *vma,
95 unsigned long start,
96 unsigned long end)
97 {
98 if (vma->vm_mm == current->mm)
99 __flush_cache_030();
100 }
102 static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
103 {
104 if (vma->vm_mm == current->mm)
105 __flush_cache_030();
106 }
109 /* Push the page at kernel virtual address and clear the icache */
110 /* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
111 static inline void __flush_page_to_ram(void *vaddr)
112 {
113 if (CPU_IS_040_OR_060) {
114 __asm__ __volatile__("nop\n\t"
115 ".chip 68040\n\t"
116 "cpushp %%bc,(%0)\n\t"
117 ".chip 68k"
118 : : "a" (__pa(vaddr)));
119 } else {
120 unsigned long _tmp;
121 __asm__ __volatile__("movec %%cacr,%0\n\t"
122 "orw %1,%0\n\t"
123 "movec %0,%%cacr"
124 : "=&d" (_tmp)
125 : "di" (FLUSH_I));
126 }
127 }
129 #define flush_dcache_page(page) __flush_page_to_ram(page_address(page))
130 #define flush_dcache_mmap_lock(mapping) do { } while (0)
131 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
132 #define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page))
134 extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
135 unsigned long addr, int len);
136 extern void flush_icache_range(unsigned long address, unsigned long endaddr);
138 static inline void copy_to_user_page(struct vm_area_struct *vma,
139 struct page *page, unsigned long vaddr,
140 void *dst, void *src, int len)
141 {
142 flush_cache_page(vma, vaddr, page_to_pfn(page));
143 memcpy(dst, src, len);
144 flush_icache_user_range(vma, page, vaddr, len);
145 }
146 static inline void copy_from_user_page(struct vm_area_struct *vma,
147 struct page *page, unsigned long vaddr,
148 void *dst, void *src, int len)
149 {
150 flush_cache_page(vma, vaddr, page_to_pfn(page));
151 memcpy(dst, src, len);
152 }
154 #endif /* _M68K_CACHEFLUSH_H */