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15#ifndef _ASM_TILE_PAGE_H
16#define _ASM_TILE_PAGE_H
17
18#include <linux/const.h>
19#include <hv/hypervisor.h>
20#include <arch/chip.h>
21
22
23#if defined(CONFIG_PAGE_SIZE_4KB)
24#define PAGE_SHIFT 12
25#define CTX_PAGE_FLAG HV_CTX_PG_SM_4K
26#elif defined(CONFIG_PAGE_SIZE_16KB)
27#define PAGE_SHIFT 14
28#define CTX_PAGE_FLAG HV_CTX_PG_SM_16K
29#elif defined(CONFIG_PAGE_SIZE_64KB)
30#define PAGE_SHIFT 16
31#define CTX_PAGE_FLAG HV_CTX_PG_SM_64K
32#else
33#error Page size not specified in Kconfig
34#endif
35#define HPAGE_SHIFT HV_LOG2_DEFAULT_PAGE_SIZE_LARGE
36
37#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
38#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
39
40#define PAGE_MASK (~(PAGE_SIZE - 1))
41#define HPAGE_MASK (~(HPAGE_SIZE - 1))
42
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46
47
48#ifndef CONFIG_FORCE_MAX_ZONEORDER
49#define CONFIG_FORCE_MAX_ZONEORDER (HPAGE_SHIFT - PAGE_SHIFT + 1)
50#endif
51
52#ifndef __ASSEMBLY__
53
54#include <linux/types.h>
55#include <linux/string.h>
56
57struct page;
58
59static inline void clear_page(void *page)
60{
61 memset(page, 0, PAGE_SIZE);
62}
63
64static inline void copy_page(void *to, void *from)
65{
66 memcpy(to, from, PAGE_SIZE);
67}
68
69static inline void clear_user_page(void *page, unsigned long vaddr,
70 struct page *pg)
71{
72 clear_page(page);
73}
74
75static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
76 struct page *topage)
77{
78 copy_page(to, from);
79}
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84
85typedef HV_PTE pte_t;
86typedef HV_PTE pgd_t;
87typedef HV_PTE pgprot_t;
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95typedef struct page *pgtable_t;
96
97
98#define __pgprot(val) hv_pte(val)
99
100
101#define __pte(x) hv_pte(x)
102#define __pgd(x) hv_pte(x)
103
104static inline u64 pgprot_val(pgprot_t pgprot)
105{
106 return hv_pte_val(pgprot);
107}
108
109static inline u64 pte_val(pte_t pte)
110{
111 return hv_pte_val(pte);
112}
113
114static inline u64 pgd_val(pgd_t pgd)
115{
116 return hv_pte_val(pgd);
117}
118
119#ifdef __tilegx__
120
121typedef HV_PTE pmd_t;
122
123#define __pmd(x) hv_pte(x)
124
125static inline u64 pmd_val(pmd_t pmd)
126{
127 return hv_pte_val(pmd);
128}
129
130#endif
131
132static inline __attribute_const__ int get_order(unsigned long size)
133{
134 return BITS_PER_LONG - __builtin_clzl((size - 1) >> PAGE_SHIFT);
135}
136
137#endif
138
139#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
140
141#define HUGE_MAX_HSTATE 6
142
143#ifdef CONFIG_HUGETLB_PAGE
144#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
145#endif
146
147
148#define MAX_PA_WIDTH CHIP_PA_WIDTH()
149#define MAX_VA_WIDTH CHIP_VA_WIDTH()
150
151
152#define NR_PA_HIGHBIT_SHIFT (MAX_PA_WIDTH - CHIP_LOG_NUM_MSHIMS())
153#define NR_PA_HIGHBIT_VALUES (1 << CHIP_LOG_NUM_MSHIMS())
154#define __pa_to_highbits(pa) ((phys_addr_t)(pa) >> NR_PA_HIGHBIT_SHIFT)
155#define __pfn_to_highbits(pfn) ((pfn) >> (NR_PA_HIGHBIT_SHIFT - PAGE_SHIFT))
156
157#ifdef __tilegx__
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175#if MAX_PA_WIDTH + 2 > MAX_VA_WIDTH
176# error Too much PA to map with the VA available!
177#endif
178
179#define PAGE_OFFSET (-(_AC(1, UL) << (MAX_VA_WIDTH - 1)))
180#define KERNEL_HIGH_VADDR _AC(0xfffffff800000000, UL)
181#define FIXADDR_BASE (KERNEL_HIGH_VADDR - 0x300000000)
182#define FIXADDR_TOP (KERNEL_HIGH_VADDR - 0x200000000)
183#define _VMALLOC_START FIXADDR_TOP
184#define MEM_SV_START (KERNEL_HIGH_VADDR - 0x100000000)
185#define MEM_MODULE_START (MEM_SV_START + (256*1024*1024))
186#define MEM_MODULE_END (MEM_MODULE_START + (256*1024*1024))
187
188#else
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217#define MEM_USER_INTRPT _AC(0xfc000000, UL)
218#define MEM_SV_START _AC(0xfd000000, UL)
219#define MEM_HV_START _AC(0xfe000000, UL)
220
221#define INTRPT_SIZE 0x4000
222
223
224#if PAGE_SIZE > INTRPT_SIZE
225#undef INTRPT_SIZE
226#define INTRPT_SIZE PAGE_SIZE
227#endif
228
229#define KERNEL_HIGH_VADDR MEM_USER_INTRPT
230#define FIXADDR_TOP (KERNEL_HIGH_VADDR - PAGE_SIZE)
231
232#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
233
234
235#define MEM_MODULE_START VMALLOC_START
236#define MEM_MODULE_END VMALLOC_END
237
238#endif
239
240#if !defined(__ASSEMBLY__) && !defined(VDSO_BUILD)
241
242#ifdef CONFIG_HIGHMEM
243
244
245extern unsigned long pbase_map[];
246extern void *vbase_map[];
247
248static inline unsigned long kaddr_to_pfn(const volatile void *_kaddr)
249{
250 unsigned long kaddr = (unsigned long)_kaddr;
251 return pbase_map[kaddr >> HPAGE_SHIFT] +
252 ((kaddr & (HPAGE_SIZE - 1)) >> PAGE_SHIFT);
253}
254
255static inline void *pfn_to_kaddr(unsigned long pfn)
256{
257 return vbase_map[__pfn_to_highbits(pfn)] + (pfn << PAGE_SHIFT);
258}
259
260static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
261{
262 unsigned long pfn = kaddr_to_pfn(kaddr);
263 return ((phys_addr_t)pfn << PAGE_SHIFT) +
264 ((unsigned long)kaddr & (PAGE_SIZE-1));
265}
266
267static inline void *phys_to_virt(phys_addr_t paddr)
268{
269 return pfn_to_kaddr(paddr >> PAGE_SHIFT) + (paddr & (PAGE_SIZE-1));
270}
271
272
273static inline int virt_addr_valid(const volatile void *kaddr)
274{
275 extern void *high_memory;
276 return ((unsigned long)kaddr >= PAGE_OFFSET && kaddr < high_memory);
277}
278
279#else
280
281static inline unsigned long kaddr_to_pfn(const volatile void *kaddr)
282{
283 return ((unsigned long)kaddr - PAGE_OFFSET) >> PAGE_SHIFT;
284}
285
286static inline void *pfn_to_kaddr(unsigned long pfn)
287{
288 return (void *)((pfn << PAGE_SHIFT) + PAGE_OFFSET);
289}
290
291static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
292{
293 return (phys_addr_t)((unsigned long)kaddr - PAGE_OFFSET);
294}
295
296static inline void *phys_to_virt(phys_addr_t paddr)
297{
298 return (void *)((unsigned long)paddr + PAGE_OFFSET);
299}
300
301
302#define virt_addr_valid(kaddr) pfn_valid(kaddr_to_pfn(kaddr))
303
304#endif
305
306
307#define __pa(kaddr) virt_to_phys((void *)(unsigned long)(kaddr))
308#define __va(paddr) phys_to_virt((phys_addr_t)(paddr))
309
310extern int devmem_is_allowed(unsigned long pagenr);
311
312#ifdef CONFIG_FLATMEM
313static inline int pfn_valid(unsigned long pfn)
314{
315 return pfn < max_mapnr;
316}
317#endif
318
319
320#define page_to_pa(page) ((phys_addr_t)(page_to_pfn(page)) << PAGE_SHIFT)
321#define virt_to_page(kaddr) pfn_to_page(kaddr_to_pfn((void *)(kaddr)))
322#define page_to_virt(page) pfn_to_kaddr(page_to_pfn(page))
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331#define ktext_writable_addr(kaddr) \
332 ((unsigned long)(kaddr) - MEM_SV_START + PAGE_OFFSET)
333
334struct mm_struct;
335extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
336extern pte_t *virt_to_kpte(unsigned long kaddr);
337
338#endif
339
340#define VM_DATA_DEFAULT_FLAGS \
341 (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
342
343#include <asm-generic/memory_model.h>
344
345#endif
346