/*
* 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 -- 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_ */