Release 4.14 arch/alpha/include/asm/mmzone.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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;
}
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#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 -- nyc */

#define kern_addr_valid(kaddr)	(0)


#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)


#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_ */
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Directory: arch/alpha/include/asm

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