ia64/linux-2.6.18-xen.hg

view include/asm-m68k/page.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_PAGE_H
2 #define _M68K_PAGE_H
5 #ifdef __KERNEL__
7 /* PAGE_SHIFT determines the page size */
8 #ifndef CONFIG_SUN3
9 #define PAGE_SHIFT (12)
10 #else
11 #define PAGE_SHIFT (13)
12 #endif
13 #ifdef __ASSEMBLY__
14 #define PAGE_SIZE (1 << PAGE_SHIFT)
15 #else
16 #define PAGE_SIZE (1UL << PAGE_SHIFT)
17 #endif
18 #define PAGE_MASK (~(PAGE_SIZE-1))
20 #include <asm/setup.h>
22 #if PAGE_SHIFT < 13
23 #define THREAD_SIZE (8192)
24 #else
25 #define THREAD_SIZE PAGE_SIZE
26 #endif
28 #ifndef __ASSEMBLY__
30 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
31 #define free_user_page(page, addr) free_page(addr)
33 /*
34 * We don't need to check for alignment etc.
35 */
36 #ifdef CPU_M68040_OR_M68060_ONLY
37 static inline void copy_page(void *to, void *from)
38 {
39 unsigned long tmp;
41 __asm__ __volatile__("1:\t"
42 ".chip 68040\n\t"
43 "move16 %1@+,%0@+\n\t"
44 "move16 %1@+,%0@+\n\t"
45 ".chip 68k\n\t"
46 "dbra %2,1b\n\t"
47 : "=a" (to), "=a" (from), "=d" (tmp)
48 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
49 );
50 }
52 static inline void clear_page(void *page)
53 {
54 unsigned long tmp;
55 unsigned long *sp = page;
57 *sp++ = 0;
58 *sp++ = 0;
59 *sp++ = 0;
60 *sp++ = 0;
62 __asm__ __volatile__("1:\t"
63 ".chip 68040\n\t"
64 "move16 %2@+,%0@+\n\t"
65 ".chip 68k\n\t"
66 "subqw #8,%2\n\t"
67 "subqw #8,%2\n\t"
68 "dbra %1,1b\n\t"
69 : "=a" (sp), "=d" (tmp)
70 : "a" (page), "0" (sp),
71 "1" ((PAGE_SIZE - 16) / 16 - 1));
72 }
74 #else
75 #define clear_page(page) memset((page), 0, PAGE_SIZE)
76 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
77 #endif
79 #define clear_user_page(addr, vaddr, page) \
80 do { clear_page(addr); \
81 flush_dcache_page(page); \
82 } while (0)
83 #define copy_user_page(to, from, vaddr, page) \
84 do { copy_page(to, from); \
85 flush_dcache_page(page); \
86 } while (0)
88 /*
89 * These are used to make use of C type-checking..
90 */
91 typedef struct { unsigned long pte; } pte_t;
92 typedef struct { unsigned long pmd[16]; } pmd_t;
93 typedef struct { unsigned long pgd; } pgd_t;
94 typedef struct { unsigned long pgprot; } pgprot_t;
96 #define pte_val(x) ((x).pte)
97 #define pmd_val(x) ((&x)->pmd[0])
98 #define pgd_val(x) ((x).pgd)
99 #define pgprot_val(x) ((x).pgprot)
101 #define __pte(x) ((pte_t) { (x) } )
102 #define __pmd(x) ((pmd_t) { (x) } )
103 #define __pgd(x) ((pgd_t) { (x) } )
104 #define __pgprot(x) ((pgprot_t) { (x) } )
106 /* to align the pointer to the (next) page boundary */
107 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
109 #endif /* !__ASSEMBLY__ */
111 #include <asm/page_offset.h>
113 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
115 #ifndef __ASSEMBLY__
117 #ifndef CONFIG_SUN3
119 #define WANT_PAGE_VIRTUAL
120 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
121 extern unsigned long m68k_memoffset;
123 #define __pa(vaddr) ((unsigned long)(vaddr)+m68k_memoffset)
124 #define __va(paddr) ((void *)((unsigned long)(paddr)-m68k_memoffset))
125 #else
126 #define __pa(vaddr) virt_to_phys((void *)(vaddr))
127 #define __va(paddr) phys_to_virt((unsigned long)(paddr))
128 #endif
130 #else /* !CONFIG_SUN3 */
131 /* This #define is a horrible hack to suppress lots of warnings. --m */
132 #define __pa(x) ___pa((unsigned long)(x))
133 static inline unsigned long ___pa(unsigned long x)
134 {
135 if(x == 0)
136 return 0;
137 if(x >= PAGE_OFFSET)
138 return (x-PAGE_OFFSET);
139 else
140 return (x+0x2000000);
141 }
143 static inline void *__va(unsigned long x)
144 {
145 if(x == 0)
146 return (void *)0;
148 if(x < 0x2000000)
149 return (void *)(x+PAGE_OFFSET);
150 else
151 return (void *)(x-0x2000000);
152 }
153 #endif /* CONFIG_SUN3 */
155 /*
156 * NOTE: virtual isn't really correct, actually it should be the offset into the
157 * memory node, but we have no highmem, so that works for now.
158 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
159 * of the shifts unnecessary.
160 */
161 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
162 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
164 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
165 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
167 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
168 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
170 #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
171 #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
173 #endif /* __ASSEMBLY__ */
175 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
176 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
178 #include <asm-generic/page.h>
180 #endif /* __KERNEL__ */
182 #endif /* _M68K_PAGE_H */