Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _ASM_POWERPC_PGTABLE_H
2#define _ASM_POWERPC_PGTABLE_H
3#ifdef __KERNEL__
4
5#ifndef __ASSEMBLY__
6#include <asm/processor.h> /* For TASK_SIZE */
7#include <asm/mmu.h>
8#include <asm/page.h>
9struct mm_struct;
10#endif /* !__ASSEMBLY__ */
11
12#if defined(CONFIG_PPC64)
13# include <asm/pgtable-ppc64.h>
14#else
15# include <asm/pgtable-ppc32.h>
16#endif
17
18#ifndef __ASSEMBLY__
19/*
20 * ZERO_PAGE is a global shared page that is always zero: used
21 * for zero-mapped memory areas etc..
22 */
23extern unsigned long empty_zero_page[];
24#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
25
26extern pgd_t swapper_pg_dir[];
27
28extern void paging_init(void);
29
30/*
31 * kern_addr_valid is intended to indicate whether an address is a valid
32 * kernel address. Most 32-bit archs define it as always true (like this)
33 * but most 64-bit archs actually perform a test. What should we do here?
34 */
35#define kern_addr_valid(addr) (1)
36
37#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
38 remap_pfn_range(vma, vaddr, pfn, size, prot)
39
40#include <asm-generic/pgtable.h>
41
42
43/*
44 * This gets called at the end of handling a page fault, when
45 * the kernel has put a new PTE into the page table for the process.
46 * We use it to ensure coherency between the i-cache and d-cache
47 * for the page which has just been mapped in.
48 * On machines which use an MMU hash table, we use this to put a
49 * corresponding HPTE into the hash table ahead of time, instead of
50 * waiting for the inevitable extra hash-table miss exception.
51 */
52extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
53
54#endif /* __ASSEMBLY__ */
55
56#endif /* __KERNEL__ */
57#endif /* _ASM_POWERPC_PGTABLE_H */