2 * Copyright (C) 2004, Microtronix Datacom Ltd.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
14 * NON INFRINGEMENT. See the GNU General Public License for more
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* copied from m68knommu arch */
28 /* PAGE_SHIFT determines the page size */
30 #define PAGE_SHIFT (12)
31 #define PAGE_SIZE (1UL << PAGE_SHIFT)
32 #define PAGE_MASK (~(PAGE_SIZE-1))
36 #include <asm/setup.h>
39 #define THREAD_SIZE (8192)
41 #define THREAD_SIZE PAGE_SIZE
46 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
47 #define free_user_page(page, addr) free_page(addr)
49 #define clear_page(page) memset((page), 0, PAGE_SIZE)
50 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
52 #define clear_user_page(page, vaddr, pg) clear_page(page)
53 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
56 * These are used to make use of C type-checking..
58 typedef struct { unsigned long pte
; } pte_t
;
59 typedef struct { unsigned long pmd
[16]; } pmd_t
;
60 typedef struct { unsigned long pgd
; } pgd_t
;
61 typedef struct { unsigned long pgprot
; } pgprot_t
;
63 #define pte_val(x) ((x).pte)
64 #define pmd_val(x) ((&x)->pmd[0])
65 #define pgd_val(x) ((x).pgd)
66 #define pgprot_val(x) ((x).pgprot)
68 #define __pte(x) ((pte_t) { (x) } )
69 #define __pmd(x) ((pmd_t) { (x) } )
70 #define __pgd(x) ((pgd_t) { (x) } )
71 #define __pgprot(x) ((pgprot_t) { (x) } )
73 /* to align the pointer to the (next) page boundary */
74 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
76 extern unsigned long memory_start
;
77 extern unsigned long memory_end
;
79 #endif /* !__ASSEMBLY__ */
81 #define PAGE_OFFSET ((int)(nasys_program_mem))
85 #define __pa(vaddr) virt_to_phys((void *)(vaddr))
86 #define __va(paddr) phys_to_virt((unsigned long)(paddr))
88 #define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
90 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
91 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
93 #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
94 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
95 #define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
97 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
98 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
99 #define pfn_valid(pfn) ((pfn) < max_mapnr)
101 #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
102 ((void *)(kaddr) < (void *)memory_end))
104 #ifdef CONFIG_NO_KERNEL_MSG
107 #define BUG_PRINT() printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__)
110 #ifdef na_cpu_oci_core
111 #define BUG_PANIC() asm volatile ("break") /* drop to debugger */
113 // #define BUG_PANIC() while(1)
114 #define BUG_PANIC() panic("BUG!")
117 #endif /* __ASSEMBLY__ */
119 #include <asm-generic/page.h>
121 #endif /* __KERNEL__ */
123 #endif /* _NIOS2_PAGE_H */