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13#ifndef __ASM_ARM_MEMORY_H
14#define __ASM_ARM_MEMORY_H
15
16#include <linux/compiler.h>
17#include <linux/const.h>
18#include <linux/types.h>
19#include <linux/sizes.h>
20
21#ifdef CONFIG_NEED_MACH_MEMORY_H
22#include <mach/memory.h>
23#endif
24
25
26
27
28
29#define UL(x) _AC(x, UL)
30
31
32#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
33
34#ifdef CONFIG_MMU
35
36
37
38
39
40#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
41#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
42
43
44
45
46#define TASK_SIZE_26 (UL(1) << 26)
47
48
49
50
51
52#ifndef CONFIG_THUMB2_KERNEL
53#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
54#else
55
56#define MODULES_VADDR (PAGE_OFFSET - SZ_8M)
57#endif
58
59#if TASK_SIZE > MODULES_VADDR
60#error Top of user space clashes with start of module space
61#endif
62
63
64
65
66#ifdef CONFIG_HIGHMEM
67#define MODULES_END (PAGE_OFFSET - PMD_SIZE)
68#else
69#define MODULES_END (PAGE_OFFSET)
70#endif
71
72
73
74
75
76
77#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
78
79#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
80
81
82
83#define IOREMAP_MAX_ORDER 24
84#endif
85
86#else
87
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89
90
91
92
93
94#define TASK_SIZE UL(0xffffffff)
95
96#ifndef TASK_UNMAPPED_BASE
97#define TASK_UNMAPPED_BASE UL(0x00000000)
98#endif
99
100#ifndef END_MEM
101#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
102#endif
103
104
105
106
107#define MODULES_END (END_MEM)
108#define MODULES_VADDR PAGE_OFFSET
109
110#define XIP_VIRT_ADDR(physaddr) (physaddr)
111
112#endif
113
114
115
116
117
118#ifdef CONFIG_HAVE_TCM
119#define ITCM_OFFSET UL(0xfffe0000)
120#define DTCM_OFFSET UL(0xfffe8000)
121#endif
122
123
124
125
126#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
127#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
128
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132
133
134
135#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
136
137#ifdef CONFIG_XIP_KERNEL
138
139
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141
142
143
144#define PHYS_RELATIVE(v_data, v_text) \
145 (((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \
146 ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \
147 CONFIG_XIP_PHYS_ADDR))
148#else
149#define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text))
150#endif
151
152#ifndef __ASSEMBLY__
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161
162
163#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
164
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168
169#define __PV_BITS_31_24 0x81000000
170#define __PV_BITS_7_0 0x81
171
172extern unsigned long __pv_phys_pfn_offset;
173extern u64 __pv_offset;
174extern void fixup_pv_table(const void *, unsigned long);
175extern const void *__pv_table_begin, *__pv_table_end;
176
177#define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
178#define PHYS_PFN_OFFSET (__pv_phys_pfn_offset)
179
180#define __pv_stub(from,to,instr,type) \
181 __asm__("@ __pv_stub\n" \
182 "1: " instr " %0, %1, %2\n" \
183 " .pushsection .pv_table,\"a\"\n" \
184 " .long 1b\n" \
185 " .popsection\n" \
186 : "=r" (to) \
187 : "r" (from), "I" (type))
188
189#define __pv_stub_mov_hi(t) \
190 __asm__ volatile("@ __pv_stub_mov\n" \
191 "1: mov %R0, %1\n" \
192 " .pushsection .pv_table,\"a\"\n" \
193 " .long 1b\n" \
194 " .popsection\n" \
195 : "=r" (t) \
196 : "I" (__PV_BITS_7_0))
197
198#define __pv_add_carry_stub(x, y) \
199 __asm__ volatile("@ __pv_add_carry_stub\n" \
200 "1: adds %Q0, %1, %2\n" \
201 " adc %R0, %R0, #0\n" \
202 " .pushsection .pv_table,\"a\"\n" \
203 " .long 1b\n" \
204 " .popsection\n" \
205 : "+r" (y) \
206 : "r" (x), "I" (__PV_BITS_31_24) \
207 : "cc")
208
209static inline phys_addr_t __virt_to_phys(unsigned long x)
210{
211 phys_addr_t t;
212
213 if (sizeof(phys_addr_t) == 4) {
214 __pv_stub(x, t, "add", __PV_BITS_31_24);
215 } else {
216 __pv_stub_mov_hi(t);
217 __pv_add_carry_stub(x, t);
218 }
219 return t;
220}
221
222static inline unsigned long __phys_to_virt(phys_addr_t x)
223{
224 unsigned long t;
225
226
227
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229
230
231
232 __pv_stub((unsigned long) x, t, "sub", __PV_BITS_31_24);
233 return t;
234}
235
236#else
237
238#define PHYS_OFFSET PLAT_PHYS_OFFSET
239#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
240
241static inline phys_addr_t __virt_to_phys(unsigned long x)
242{
243 return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
244}
245
246static inline unsigned long __phys_to_virt(phys_addr_t x)
247{
248 return x - PHYS_OFFSET + PAGE_OFFSET;
249}
250
251#endif
252
253#define virt_to_pfn(kaddr) \
254 ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
255 PHYS_PFN_OFFSET)
256
257
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259
260
261
262
263#define virt_to_phys virt_to_phys
264static inline phys_addr_t virt_to_phys(const volatile void *x)
265{
266 return __virt_to_phys((unsigned long)(x));
267}
268
269#define phys_to_virt phys_to_virt
270static inline void *phys_to_virt(phys_addr_t x)
271{
272 return (void *)__phys_to_virt(x);
273}
274
275
276
277
278#define __pa(x) __virt_to_phys((unsigned long)(x))
279#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
280#define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT)
281
282extern long long arch_phys_to_idmap_offset;
283
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287
288
289static inline bool arm_has_idmap_alias(void)
290{
291 return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
292}
293
294#define IDMAP_INVALID_ADDR ((u32)~0)
295
296static inline unsigned long phys_to_idmap(phys_addr_t addr)
297{
298 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
299 addr += arch_phys_to_idmap_offset;
300 if (addr > (u32)~0)
301 addr = IDMAP_INVALID_ADDR;
302 }
303 return addr;
304}
305
306static inline phys_addr_t idmap_to_phys(unsigned long idmap)
307{
308 phys_addr_t addr = idmap;
309
310 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset)
311 addr -= arch_phys_to_idmap_offset;
312
313 return addr;
314}
315
316static inline unsigned long __virt_to_idmap(unsigned long x)
317{
318 return phys_to_idmap(__virt_to_phys(x));
319}
320
321#define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))
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328
329#ifndef __virt_to_bus
330#define __virt_to_bus __virt_to_phys
331#define __bus_to_virt __phys_to_virt
332#define __pfn_to_bus(x) __pfn_to_phys(x)
333#define __bus_to_pfn(x) __phys_to_pfn(x)
334#endif
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343
344
345#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
346
347#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
348#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
349 && pfn_valid(virt_to_pfn(kaddr)))
350
351#endif
352
353#include <asm-generic/memory_model.h>
354
355#endif
356