1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _M68K_PAGE_H
3 #define _M68K_PAGE_H
4 
5 #include <linux/const.h>
6 #include <asm/setup.h>
7 #include <asm/page_offset.h>
8 
9 /* PAGE_SHIFT determines the page size */
10 #if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
11 #define PAGE_SHIFT	13
12 #else
13 #define PAGE_SHIFT	12
14 #endif
15 #define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
16 #define PAGE_MASK	(~(PAGE_SIZE-1))
17 #define PAGE_OFFSET	(PAGE_OFFSET_RAW)
18 
19 #ifndef __ASSEMBLY__
20 
21 /*
22  * These are used to make use of C type-checking..
23  */
24 #if !defined(CONFIG_MMU) || CONFIG_PGTABLE_LEVELS == 3
25 typedef struct { unsigned long pmd; } pmd_t;
26 #define pmd_val(x)	((&x)->pmd)
27 #define __pmd(x)	((pmd_t) { (x) } )
28 #endif
29 
30 typedef struct { unsigned long pte; } pte_t;
31 typedef struct { unsigned long pgd; } pgd_t;
32 typedef struct { unsigned long pgprot; } pgprot_t;
33 
34 #if defined(CONFIG_SUN3)
35 /*
36  * Sun3 still uses the asm-generic/pgalloc.h code and thus needs this
37  * definition. It would be possible to unify Sun3 and ColdFire pgalloc and have
38  * all of m68k use the same type.
39  */
40 typedef struct page *pgtable_t;
41 #else
42 typedef pte_t *pgtable_t;
43 #endif
44 
45 #define pte_val(x)	((x).pte)
46 #define pgd_val(x)	((x).pgd)
47 #define pgprot_val(x)	((x).pgprot)
48 
49 #define __pte(x)	((pte_t) { (x) } )
50 #define __pgd(x)	((pgd_t) { (x) } )
51 #define __pgprot(x)	((pgprot_t) { (x) } )
52 
53 extern unsigned long _rambase;
54 extern unsigned long _ramstart;
55 extern unsigned long _ramend;
56 
57 #endif /* !__ASSEMBLY__ */
58 
59 #ifdef CONFIG_MMU
60 #include <asm/page_mm.h>
61 #else
62 #include <asm/page_no.h>
63 #endif
64 
65 #ifndef CONFIG_MMU
66 #define __phys_to_pfn(paddr)	((unsigned long)((paddr) >> PAGE_SHIFT))
67 #define __pfn_to_phys(pfn)	PFN_PHYS(pfn)
68 #endif
69 
70 #include <asm-generic/getorder.h>
71 
72 #endif /* _M68K_PAGE_H */
73