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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 unsigned long pfmf(unsigned long function, unsigned long address)
36{
37 asm volatile(
38 " .insn rre,0xb9af0000,%[function],%[address]"
39 : [address] "+a" (address)
40 : [function] "d" (function)
41 : "memory");
42 return address;
43}
44
45static inline void clear_page(void *page)
46{
47 register unsigned long reg1 asm ("1") = 0;
48 register void *reg2 asm ("2") = page;
49 register unsigned long reg3 asm ("3") = 4096;
50 asm volatile(
51 " mvcl 2,0"
52 : "+d" (reg2), "+d" (reg3) : "d" (reg1)
53 : "memory", "cc");
54}
55
56static inline void copy_page(void *to, void *from)
57{
58 if (MACHINE_HAS_MVPG) {
59 register unsigned long reg0 asm ("0") = 0;
60 asm volatile(
61 " mvpg %0,%1"
62 : : "a" (to), "a" (from), "d" (reg0)
63 : "memory", "cc");
64 } else
65 asm volatile(
66 " mvc 0(256,%0),0(%1)\n"
67 " mvc 256(256,%0),256(%1)\n"
68 " mvc 512(256,%0),512(%1)\n"
69 " mvc 768(256,%0),768(%1)\n"
70 " mvc 1024(256,%0),1024(%1)\n"
71 " mvc 1280(256,%0),1280(%1)\n"
72 " mvc 1536(256,%0),1536(%1)\n"
73 " mvc 1792(256,%0),1792(%1)\n"
74 " mvc 2048(256,%0),2048(%1)\n"
75 " mvc 2304(256,%0),2304(%1)\n"
76 " mvc 2560(256,%0),2560(%1)\n"
77 " mvc 2816(256,%0),2816(%1)\n"
78 " mvc 3072(256,%0),3072(%1)\n"
79 " mvc 3328(256,%0),3328(%1)\n"
80 " mvc 3584(256,%0),3584(%1)\n"
81 " mvc 3840(256,%0),3840(%1)\n"
82 : : "a" (to), "a" (from) : "memory");
83}
84
85#define clear_user_page(page, vaddr, pg) clear_page(page)
86#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
87
88#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
89 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
90#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
91
92
93
94
95
96typedef struct { unsigned long pgprot; } pgprot_t;
97typedef struct { unsigned long pgste; } pgste_t;
98typedef struct { unsigned long pte; } pte_t;
99typedef struct { unsigned long pmd; } pmd_t;
100typedef struct { unsigned long pud; } pud_t;
101typedef struct { unsigned long pgd; } pgd_t;
102typedef pte_t *pgtable_t;
103
104#define pgprot_val(x) ((x).pgprot)
105#define pgste_val(x) ((x).pgste)
106#define pte_val(x) ((x).pte)
107#define pmd_val(x) ((x).pmd)
108#define pud_val(x) ((x).pud)
109#define pgd_val(x) ((x).pgd)
110
111#define __pgste(x) ((pgste_t) { (x) } )
112#define __pte(x) ((pte_t) { (x) } )
113#define __pmd(x) ((pmd_t) { (x) } )
114#define __pud(x) ((pud_t) { (x) } )
115#define __pgd(x) ((pgd_t) { (x) } )
116#define __pgprot(x) ((pgprot_t) { (x) } )
117
118static inline void page_set_storage_key(unsigned long addr,
119 unsigned char skey, int mapped)
120{
121 if (!mapped)
122 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
123 : : "d" (skey), "a" (addr));
124 else
125 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
126}
127
128static inline unsigned char page_get_storage_key(unsigned long addr)
129{
130 unsigned char skey;
131
132 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
133 return skey;
134}
135
136static inline int page_reset_referenced(unsigned long addr)
137{
138 unsigned int ipm;
139
140 asm volatile(
141 " rrbe 0,%1\n"
142 " ipm %0\n"
143 : "=d" (ipm) : "a" (addr) : "cc");
144 return !!(ipm & 0x20000000);
145}
146
147
148#define _PAGE_CHANGED 0x02
149#define _PAGE_REFERENCED 0x04
150#define _PAGE_FP_BIT 0x08
151#define _PAGE_ACC_BITS 0xf0
152
153
154
155
156#define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
157static inline int page_test_and_clear_young(unsigned long pfn)
158{
159 return page_reset_referenced(pfn << PAGE_SHIFT);
160}
161
162struct page;
163void arch_free_page(struct page *page, int order);
164void arch_alloc_page(struct page *page, int order);
165void arch_set_page_states(int make_stable);
166
167static inline int devmem_is_allowed(unsigned long pfn)
168{
169 return 0;
170}
171
172#define HAVE_ARCH_FREE_PAGE
173#define HAVE_ARCH_ALLOC_PAGE
174
175#endif
176
177#define __PAGE_OFFSET 0x0UL
178#define PAGE_OFFSET 0x0UL
179#define __pa(x) (unsigned long)(x)
180#define __va(x) (void *)(unsigned long)(x)
181#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
182#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
183#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
184
185#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
186 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
187
188#include <asm-generic/memory_model.h>
189#include <asm-generic/getorder.h>
190
191#define __HAVE_ARCH_GATE_AREA 1
192
193#endif
194
