mmzone.h

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/*
 * Written by Kanoj Sarcar ([email protected]) 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))

/*
 * 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_ */