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6
7#ifndef _S390_PAGE_H
8#define _S390_PAGE_H
9
10#include <linux/const.h>
11#include <asm/types.h>
12
13
14#define PAGE_SHIFT 12
15#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
16#define PAGE_MASK (~(PAGE_SIZE-1))
17#define PAGE_DEFAULT_ACC 0
18#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
19
20#define HPAGE_SHIFT 20
21#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
22#define HPAGE_MASK (~(HPAGE_SIZE - 1))
23#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
24
25#define ARCH_HAS_SETCLEAR_HUGE_PTE
26#define ARCH_HAS_HUGE_PTE_TYPE
27#define ARCH_HAS_PREPARE_HUGEPAGE
28#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
29
30#include <asm/setup.h>
31#ifndef __ASSEMBLY__
32
33void storage_key_init_range(unsigned long start, unsigned long end);
34
35static inline void clear_page(void *page)
36{
37 register unsigned long reg1 asm ("1") = 0;
38 register void *reg2 asm ("2") = page;
39 register unsigned long reg3 asm ("3") = 4096;
40 asm volatile(
41 " mvcl 2,0"
42 : "+d" (reg2), "+d" (reg3) : "d" (reg1)
43 : "memory", "cc");
44}
45
46static inline void copy_page(void *to, void *from)
47{
48 if (MACHINE_HAS_MVPG) {
49 register unsigned long reg0 asm ("0") = 0;
50 asm volatile(
51 " mvpg %0,%1"
52 : : "a" (to), "a" (from), "d" (reg0)
53 : "memory", "cc");
54 } else
55 asm volatile(
56 " mvc 0(256,%0),0(%1)\n"
57 " mvc 256(256,%0),256(%1)\n"
58 " mvc 512(256,%0),512(%1)\n"
59 " mvc 768(256,%0),768(%1)\n"
60 " mvc 1024(256,%0),1024(%1)\n"
61 " mvc 1280(256,%0),1280(%1)\n"
62 " mvc 1536(256,%0),1536(%1)\n"
63 " mvc 1792(256,%0),1792(%1)\n"
64 " mvc 2048(256,%0),2048(%1)\n"
65 " mvc 2304(256,%0),2304(%1)\n"
66 " mvc 2560(256,%0),2560(%1)\n"
67 " mvc 2816(256,%0),2816(%1)\n"
68 " mvc 3072(256,%0),3072(%1)\n"
69 " mvc 3328(256,%0),3328(%1)\n"
70 " mvc 3584(256,%0),3584(%1)\n"
71 " mvc 3840(256,%0),3840(%1)\n"
72 : : "a" (to), "a" (from) : "memory");
73}
74
75#define clear_user_page(page, vaddr, pg) clear_page(page)
76#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
77
78#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
79 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
80#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
81
82
83
84
85
86typedef struct { unsigned long pgprot; } pgprot_t;
87typedef struct { unsigned long pgste; } pgste_t;
88typedef struct { unsigned long pte; } pte_t;
89typedef struct { unsigned long pmd; } pmd_t;
90typedef struct { unsigned long pud; } pud_t;
91typedef struct { unsigned long pgd; } pgd_t;
92typedef pte_t *pgtable_t;
93
94#define pgprot_val(x) ((x).pgprot)
95#define pgste_val(x) ((x).pgste)
96#define pte_val(x) ((x).pte)
97#define pmd_val(x) ((x).pmd)
98#define pud_val(x) ((x).pud)
99#define pgd_val(x) ((x).pgd)
100
101#define __pgste(x) ((pgste_t) { (x) } )
102#define __pte(x) ((pte_t) { (x) } )
103#define __pmd(x) ((pmd_t) { (x) } )
104#define __pud(x) ((pud_t) { (x) } )
105#define __pgd(x) ((pgd_t) { (x) } )
106#define __pgprot(x) ((pgprot_t) { (x) } )
107
108static inline void page_set_storage_key(unsigned long addr,
109 unsigned char skey, int mapped)
110{
111 if (!mapped)
112 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
113 : : "d" (skey), "a" (addr));
114 else
115 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
116}
117
118static inline unsigned char page_get_storage_key(unsigned long addr)
119{
120 unsigned char skey;
121
122 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
123 return skey;
124}
125
126static inline int page_reset_referenced(unsigned long addr)
127{
128 unsigned int ipm;
129
130 asm volatile(
131 " rrbe 0,%1\n"
132 " ipm %0\n"
133 : "=d" (ipm) : "a" (addr) : "cc");
134 return !!(ipm & 0x20000000);
135}
136
137
138#define _PAGE_CHANGED 0x02
139#define _PAGE_REFERENCED 0x04
140#define _PAGE_FP_BIT 0x08
141#define _PAGE_ACC_BITS 0xf0
142
143struct page;
144void arch_free_page(struct page *page, int order);
145void arch_alloc_page(struct page *page, int order);
146void arch_set_page_states(int make_stable);
147
148static inline int devmem_is_allowed(unsigned long pfn)
149{
150 return 0;
151}
152
153#define HAVE_ARCH_FREE_PAGE
154#define HAVE_ARCH_ALLOC_PAGE
155
156#endif
157
158#define __PAGE_OFFSET 0x0UL
159#define PAGE_OFFSET 0x0UL
160#define __pa(x) (unsigned long)(x)
161#define __va(x) (void *)(unsigned long)(x)
162#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
163#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
164#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
165
166#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
167 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
168
169#include <asm-generic/memory_model.h>
170#include <asm-generic/getorder.h>
171
172#define __HAVE_ARCH_GATE_AREA 1
173
174#endif
175
