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Linux kernel mirror (for testing)
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1#ifndef _ASM_POWERPC_PAGE_32_H
2#define _ASM_POWERPC_PAGE_32_H
3
4#include <asm/cache.h>
5
6#if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
7#if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
8#error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
9#endif
10#endif
11
12#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
13
14#ifdef CONFIG_NOT_COHERENT_CACHE
15#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
16#endif
17
18#ifdef CONFIG_PTE_64BIT
19#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
20#else
21#define PTE_FLAGS_OFFSET 0
22#endif
23
24#ifdef CONFIG_PPC_256K_PAGES
25#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2) /* 1/4 of a page */
26#else
27#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2) /* full page */
28#endif
29
30#ifndef __ASSEMBLY__
31/*
32 * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
33 * physical addressing.
34 */
35#ifdef CONFIG_PTE_64BIT
36typedef unsigned long long pte_basic_t;
37#else
38typedef unsigned long pte_basic_t;
39#endif
40
41/*
42 * Clear page using the dcbz instruction, which doesn't cause any
43 * memory traffic (except to write out any cache lines which get
44 * displaced). This only works on cacheable memory.
45 */
46static inline void clear_page(void *addr)
47{
48 unsigned int i;
49
50 for (i = 0; i < PAGE_SIZE / L1_CACHE_BYTES; i++, addr += L1_CACHE_BYTES)
51 dcbz(addr);
52}
53extern void copy_page(void *to, void *from);
54
55#include <asm-generic/getorder.h>
56
57#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
58#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
59
60#endif /* __ASSEMBLY__ */
61
62#endif /* _ASM_POWERPC_PAGE_32_H */