This source file includes following definitions.
- clear_page
1
2 #ifndef _ASM_POWERPC_PAGE_32_H
3 #define _ASM_POWERPC_PAGE_32_H
4
5 #include <asm/cache.h>
6
7 #if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
8 #if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
9 #error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
10 #endif
11 #endif
12
13 #define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
14
15 #ifdef CONFIG_NOT_COHERENT_CACHE
16 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES
17 #endif
18
19 #ifdef CONFIG_PTE_64BIT
20 #define PTE_FLAGS_OFFSET 4
21 #else
22 #define PTE_FLAGS_OFFSET 0
23 #endif
24
25 #if defined(CONFIG_PPC_256K_PAGES) || \
26 (defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES))
27 #define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2)
28 #else
29 #define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2)
30 #endif
31
32 #ifndef __ASSEMBLY__
33
34
35
36
37 #ifdef CONFIG_PTE_64BIT
38 typedef unsigned long long pte_basic_t;
39 #else
40 typedef unsigned long pte_basic_t;
41 #endif
42
43 #include <asm/bug.h>
44
45
46
47
48
49
50 static inline void clear_page(void *addr)
51 {
52 unsigned int i;
53
54 WARN_ON((unsigned long)addr & (L1_CACHE_BYTES - 1));
55
56 for (i = 0; i < PAGE_SIZE / L1_CACHE_BYTES; i++, addr += L1_CACHE_BYTES)
57 dcbz(addr);
58 }
59 extern void copy_page(void *to, void *from);
60
61 #include <asm-generic/getorder.h>
62
63 #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
64 #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
65
66 #endif
67
68 #endif