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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#define HUGE_MAX_HSTATE 2
25
26#define ARCH_HAS_SETCLEAR_HUGE_PTE
27#define ARCH_HAS_HUGE_PTE_TYPE
28#define ARCH_HAS_PREPARE_HUGEPAGE
29#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
30
31#include <asm/setup.h>
32#ifndef __ASSEMBLY__
33
34static inline void storage_key_init_range(unsigned long start, unsigned long end)
35{
36#if PAGE_DEFAULT_KEY
37 __storage_key_init_range(start, end);
38#endif
39}
40
41static inline void clear_page(void *page)
42{
43 register unsigned long reg1 asm ("1") = 0;
44 register void *reg2 asm ("2") = page;
45 register unsigned long reg3 asm ("3") = 4096;
46 asm volatile(
47 " mvcl 2,0"
48 : "+d" (reg2), "+d" (reg3) : "d" (reg1)
49 : "memory", "cc");
50}
51
52static inline void copy_page(void *to, void *from)
53{
54 if (MACHINE_HAS_MVPG) {
55 register unsigned long reg0 asm ("0") = 0;
56 asm volatile(
57 " mvpg %0,%1"
58 : : "a" (to), "a" (from), "d" (reg0)
59 : "memory", "cc");
60 } else
61 asm volatile(
62 " mvc 0(256,%0),0(%1)\n"
63 " mvc 256(256,%0),256(%1)\n"
64 " mvc 512(256,%0),512(%1)\n"
65 " mvc 768(256,%0),768(%1)\n"
66 " mvc 1024(256,%0),1024(%1)\n"
67 " mvc 1280(256,%0),1280(%1)\n"
68 " mvc 1536(256,%0),1536(%1)\n"
69 " mvc 1792(256,%0),1792(%1)\n"
70 " mvc 2048(256,%0),2048(%1)\n"
71 " mvc 2304(256,%0),2304(%1)\n"
72 " mvc 2560(256,%0),2560(%1)\n"
73 " mvc 2816(256,%0),2816(%1)\n"
74 " mvc 3072(256,%0),3072(%1)\n"
75 " mvc 3328(256,%0),3328(%1)\n"
76 " mvc 3584(256,%0),3584(%1)\n"
77 " mvc 3840(256,%0),3840(%1)\n"
78 : : "a" (to), "a" (from) : "memory");
79}
80
81#define clear_user_page(page, vaddr, pg) clear_page(page)
82#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
83
84#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
85 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
86#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
87
88
89
90
91
92typedef struct { unsigned long pgprot; } pgprot_t;
93typedef struct { unsigned long pgste; } pgste_t;
94typedef struct { unsigned long pte; } pte_t;
95typedef struct { unsigned long pmd; } pmd_t;
96typedef struct { unsigned long pud; } pud_t;
97typedef struct { unsigned long pgd; } pgd_t;
98typedef pte_t *pgtable_t;
99
100#define pgprot_val(x) ((x).pgprot)
101#define pgste_val(x) ((x).pgste)
102#define pte_val(x) ((x).pte)
103#define pmd_val(x) ((x).pmd)
104#define pud_val(x) ((x).pud)
105#define pgd_val(x) ((x).pgd)
106
107#define __pgste(x) ((pgste_t) { (x) } )
108#define __pte(x) ((pte_t) { (x) } )
109#define __pmd(x) ((pmd_t) { (x) } )
110#define __pud(x) ((pud_t) { (x) } )
111#define __pgd(x) ((pgd_t) { (x) } )
112#define __pgprot(x) ((pgprot_t) { (x) } )
113
114static inline void page_set_storage_key(unsigned long addr,
115 unsigned char skey, int mapped)
116{
117 if (!mapped)
118 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
119 : : "d" (skey), "a" (addr));
120 else
121 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
122}
123
124static inline unsigned char page_get_storage_key(unsigned long addr)
125{
126 unsigned char skey;
127
128 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
129 return skey;
130}
131
132static inline int page_reset_referenced(unsigned long addr)
133{
134 unsigned int ipm;
135
136 asm volatile(
137 " rrbe 0,%1\n"
138 " ipm %0\n"
139 : "=d" (ipm) : "a" (addr) : "cc");
140 return !!(ipm & 0x20000000);
141}
142
143
144#define _PAGE_CHANGED 0x02
145#define _PAGE_REFERENCED 0x04
146#define _PAGE_FP_BIT 0x08
147#define _PAGE_ACC_BITS 0xf0
148
149struct page;
150void arch_free_page(struct page *page, int order);
151void arch_alloc_page(struct page *page, int order);
152void arch_set_page_states(int make_stable);
153
154static inline int devmem_is_allowed(unsigned long pfn)
155{
156 return 0;
157}
158
159#define HAVE_ARCH_FREE_PAGE
160#define HAVE_ARCH_ALLOC_PAGE
161
162#endif
163
164#define __PAGE_OFFSET 0x0UL
165#define PAGE_OFFSET 0x0UL
166#define __pa(x) (unsigned long)(x)
167#define __va(x) (void *)(unsigned long)(x)
168#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
169#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
170#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
171
172#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
173 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
174
175#include <asm-generic/memory_model.h>
176#include <asm-generic/getorder.h>
177
178#define __HAVE_ARCH_GATE_AREA 1
179
180#endif
181
