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46a82b2d55
One of the changes necessary for shared page tables is to standardize the pxx_page macros. pte_page and pmd_page have always returned the struct page associated with their entry, while pte_page_kernel and pmd_page_kernel have returned the kernel virtual address. pud_page and pgd_page, on the other hand, return the kernel virtual address. Shared page tables needs pud_page and pgd_page to return the actual page structures. There are very few actual users of these functions, so it is simple to standardize their usage. Since this is basic cleanup, I am submitting these changes as a standalone patch. Per Hugh Dickins' comments about it, I am also changing the pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning. Signed-off-by: Dave McCracken <dmccr@us.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
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* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
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* Adapted for the alpha wildfire architecture Jan 2001.
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*/
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#ifndef _ASM_MMZONE_H_
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#define _ASM_MMZONE_H_
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#include <asm/smp.h>
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struct bootmem_data_t; /* stupid forward decl. */
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/*
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* Following are macros that are specific to this numa platform.
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*/
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extern pg_data_t node_data[];
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#define alpha_pa_to_nid(pa) \
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(alpha_mv.pa_to_nid \
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? alpha_mv.pa_to_nid(pa) \
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: (0))
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#define node_mem_start(nid) \
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(alpha_mv.node_mem_start \
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? alpha_mv.node_mem_start(nid) \
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: (0UL))
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#define node_mem_size(nid) \
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(alpha_mv.node_mem_size \
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? alpha_mv.node_mem_size(nid) \
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: ((nid) ? (0UL) : (~0UL)))
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#define pa_to_nid(pa) alpha_pa_to_nid(pa)
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#define NODE_DATA(nid) (&node_data[(nid)])
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#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
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#if 1
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#define PLAT_NODE_DATA_LOCALNR(p, n) \
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(((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
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#else
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static inline unsigned long
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PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
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{
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unsigned long temp;
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temp = p >> PAGE_SHIFT;
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return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
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}
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#endif
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#ifdef CONFIG_DISCONTIGMEM
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/*
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* Following are macros that each numa implementation must define.
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*/
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/*
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* Given a kernel address, find the home node of the underlying memory.
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*/
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#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
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#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
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/*
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* Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
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* and returns the kaddr corresponding to first physical page in the
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* node's mem_map.
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*/
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#define LOCAL_BASE_ADDR(kaddr) \
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((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn \
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<< PAGE_SHIFT))
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/* XXX: FIXME -- wli */
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#define kern_addr_valid(kaddr) (0)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
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#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32))
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#define pgd_page(pgd) (pfn_to_page(pgd_val(pgd) >> 32))
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#define pte_pfn(pte) (pte_val(pte) >> 32)
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#define mk_pte(page, pgprot) \
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({ \
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pte_t pte; \
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unsigned long pfn; \
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\
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pfn = page_to_pfn(page) << 32; \
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pte_val(pte) = pfn | pgprot_val(pgprot); \
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\
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pte; \
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})
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#define pte_page(x) \
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({ \
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unsigned long kvirt; \
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struct page * __xx; \
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\
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kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT)); \
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__xx = virt_to_page(kvirt); \
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\
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__xx; \
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})
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#define page_to_pa(page) \
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(page_to_pfn(page) << PAGE_SHIFT)
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#define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
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#define pfn_valid(pfn) \
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(((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \
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node_spanned_pages(pfn_to_nid(pfn))) \
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#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
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#endif /* CONFIG_DISCONTIGMEM */
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#endif /* _ASM_MMZONE_H_ */
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