android_kernel_xiaomi_sm8350/include/asm-alpha/mmzone.h
Dave McCracken 46a82b2d55 [PATCH] Standardize pxx_page macros
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>
2006-09-26 08:48:51 -07:00

116 lines
3.1 KiB
C

/*
* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
* Adapted for the alpha wildfire architecture Jan 2001.
*/
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_
#include <asm/smp.h>
struct bootmem_data_t; /* stupid forward decl. */
/*
* Following are macros that are specific to this numa platform.
*/
extern pg_data_t node_data[];
#define alpha_pa_to_nid(pa) \
(alpha_mv.pa_to_nid \
? alpha_mv.pa_to_nid(pa) \
: (0))
#define node_mem_start(nid) \
(alpha_mv.node_mem_start \
? alpha_mv.node_mem_start(nid) \
: (0UL))
#define node_mem_size(nid) \
(alpha_mv.node_mem_size \
? alpha_mv.node_mem_size(nid) \
: ((nid) ? (0UL) : (~0UL)))
#define pa_to_nid(pa) alpha_pa_to_nid(pa)
#define NODE_DATA(nid) (&node_data[(nid)])
#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
#if 1
#define PLAT_NODE_DATA_LOCALNR(p, n) \
(((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
#else
static inline unsigned long
PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
{
unsigned long temp;
temp = p >> PAGE_SHIFT;
return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
}
#endif
#ifdef CONFIG_DISCONTIGMEM
/*
* Following are macros that each numa implementation must define.
*/
/*
* Given a kernel address, find the home node of the underlying memory.
*/
#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
/*
* Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
* and returns the kaddr corresponding to first physical page in the
* node's mem_map.
*/
#define LOCAL_BASE_ADDR(kaddr) \
((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn \
<< PAGE_SHIFT))
/* XXX: FIXME -- wli */
#define kern_addr_valid(kaddr) (0)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32))
#define pgd_page(pgd) (pfn_to_page(pgd_val(pgd) >> 32))
#define pte_pfn(pte) (pte_val(pte) >> 32)
#define mk_pte(page, pgprot) \
({ \
pte_t pte; \
unsigned long pfn; \
\
pfn = page_to_pfn(page) << 32; \
pte_val(pte) = pfn | pgprot_val(pgprot); \
\
pte; \
})
#define pte_page(x) \
({ \
unsigned long kvirt; \
struct page * __xx; \
\
kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT)); \
__xx = virt_to_page(kvirt); \
\
__xx; \
})
#define page_to_pa(page) \
(page_to_pfn(page) << PAGE_SHIFT)
#define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
#define pfn_valid(pfn) \
(((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \
node_spanned_pages(pfn_to_nid(pfn))) \
#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
#endif /* CONFIG_DISCONTIGMEM */
#endif /* _ASM_MMZONE_H_ */