page.h (3eb66e91a25497065c5322b1268cbc3953642227) page.h (f62e31623d718a7c20d9da98de48361624d7360a)
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_PAGE_H
4#define __ASM_CSKY_PAGE_H
5
6#include <asm/setup.h>
7#include <asm/cache.h>
8#include <linux/const.h>
9
10/*
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_PAGE_H
4#define __ASM_CSKY_PAGE_H
5
6#include <asm/setup.h>
7#include <asm/cache.h>
8#include <linux/const.h>
9
10/*
11 * PAGE_SHIFT determines the page size
11 * PAGE_SHIFT determines the page size: 4KB
12 */
13#define PAGE_SHIFT 12
14#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
15#define PAGE_MASK (~(PAGE_SIZE - 1))
16#define THREAD_SIZE (PAGE_SIZE * 2)
17#define THREAD_MASK (~(THREAD_SIZE - 1))
18#define THREAD_SHIFT (PAGE_SHIFT + 1)
19
12 */
13#define PAGE_SHIFT 12
14#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
15#define PAGE_MASK (~(PAGE_SIZE - 1))
16#define THREAD_SIZE (PAGE_SIZE * 2)
17#define THREAD_MASK (~(THREAD_SIZE - 1))
18#define THREAD_SHIFT (PAGE_SHIFT + 1)
19
20
20/*
21/*
21 * NOTE: virtual isn't really correct, actually it should be the offset into the
22 * memory node, but we have no highmem, so that works for now.
23 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
24 * of the shifts unnecessary.
22 * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there
23 * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical
24 * address region. We use them mapping kernel 1GB direct-map address area and
25 * for more than 1GB of memory we use highmem.
25 */
26 */
27#define PAGE_OFFSET 0x80000000
28#define SSEG_SIZE 0x20000000
29#define LOWMEM_LIMIT (SSEG_SIZE * 2)
26
30
31#define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (SSEG_SIZE - 1))
32
27#ifndef __ASSEMBLY__
28
29#include <linux/pfn.h>
30
31#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
32#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
33
34#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \

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45#define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr)))
46
47struct page;
48
49#include <abi/page.h>
50
51struct vm_area_struct;
52
33#ifndef __ASSEMBLY__
34
35#include <linux/pfn.h>
36
37#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
38#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
39
40#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \

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51#define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr)))
52
53struct page;
54
55#include <abi/page.h>
56
57struct vm_area_struct;
58
53/*
54 * These are used to make use of C type-checking..
55 */
56typedef struct { unsigned long pte_low; } pte_t;
57#define pte_val(x) ((x).pte_low)
58
59typedef struct { unsigned long pgd; } pgd_t;
60typedef struct { unsigned long pgprot; } pgprot_t;
61typedef struct page *pgtable_t;
62
63#define pgd_val(x) ((x).pgd)
64#define pgprot_val(x) ((x).pgprot)
65
66#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
67
68#define __pte(x) ((pte_t) { (x) })
69#define __pgd(x) ((pgd_t) { (x) })
70#define __pgprot(x) ((pgprot_t) { (x) })
71
59typedef struct { unsigned long pte_low; } pte_t;
60#define pte_val(x) ((x).pte_low)
61
62typedef struct { unsigned long pgd; } pgd_t;
63typedef struct { unsigned long pgprot; } pgprot_t;
64typedef struct page *pgtable_t;
65
66#define pgd_val(x) ((x).pgd)
67#define pgprot_val(x) ((x).pgprot)
68
69#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
70
71#define __pte(x) ((pte_t) { (x) })
72#define __pgd(x) ((pgd_t) { (x) })
73#define __pgprot(x) ((pgprot_t) { (x) })
74
72#endif /* !__ASSEMBLY__ */
75extern unsigned long phys_offset;
73
76
74#define PHYS_OFFSET (CONFIG_RAM_BASE & ~(LOWMEM_LIMIT - 1))
75#define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (LOWMEM_LIMIT - 1))
76#define ARCH_PFN_OFFSET PFN_DOWN(CONFIG_RAM_BASE)
77#define ARCH_PFN_OFFSET PFN_DOWN(phys_offset + PHYS_OFFSET_OFFSET)
77
78
78#define PAGE_OFFSET 0x80000000
79#define LOWMEM_LIMIT 0x40000000
80
81#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
79#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_offset)
82#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - \
80#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - \
83 PHYS_OFFSET))
81 phys_offset))
84#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
85
86#define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \
87 PHYS_OFFSET_OFFSET)
88#define virt_to_page(x) (mem_map + MAP_NR(x))
89
90#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
91 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
92
82#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
83
84#define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \
85 PHYS_OFFSET_OFFSET)
86#define virt_to_page(x) (mem_map + MAP_NR(x))
87
88#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
89 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
90
93/*
94 * main RAM and kernel working space are coincident at 0x80000000, but to make
95 * life more interesting, there's also an uncached virtual shadow at 0xb0000000
96 * - these mappings are fixed in the MMU
97 */
98
99#define pfn_to_kaddr(x) __va(PFN_PHYS(x))
100
101#include <asm-generic/memory_model.h>
102#include <asm-generic/getorder.h>
103
91#define pfn_to_kaddr(x) __va(PFN_PHYS(x))
92
93#include <asm-generic/memory_model.h>
94#include <asm-generic/getorder.h>
95
96#endif /* !__ASSEMBLY__ */
104#endif /* __ASM_CSKY_PAGE_H */
97#endif /* __ASM_CSKY_PAGE_H */