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10#ifndef __ASM_ARM_MEMORY_H
11#define __ASM_ARM_MEMORY_H
12
13#include <linux/compiler.h>
14#include <linux/const.h>
15#include <linux/types.h>
16#include <linux/sizes.h>
17
18#ifdef CONFIG_NEED_MACH_MEMORY_H
19#include <mach/memory.h>
20#endif
21
22
23#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
24
25#ifdef CONFIG_MMU
26
27
28
29
30
31#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
32#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
33
34
35
36
37#define TASK_SIZE_26 (UL(1) << 26)
38
39
40
41
42
43#ifndef CONFIG_THUMB2_KERNEL
44#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
45#else
46
47#define MODULES_VADDR (PAGE_OFFSET - SZ_8M)
48#endif
49
50#if TASK_SIZE > MODULES_VADDR
51#error Top of user space clashes with start of module space
52#endif
53
54
55
56
57#ifdef CONFIG_HIGHMEM
58#define MODULES_END (PAGE_OFFSET - PMD_SIZE)
59#else
60#define MODULES_END (PAGE_OFFSET)
61#endif
62
63
64
65
66
67
68#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
69
70#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
71
72
73
74#define IOREMAP_MAX_ORDER 24
75#endif
76
77#define VECTORS_BASE UL(0xffff0000)
78
79#else
80
81#ifndef __ASSEMBLY__
82extern unsigned long setup_vectors_base(void);
83extern unsigned long vectors_base;
84#define VECTORS_BASE vectors_base
85#endif
86
87
88
89
90
91
92
93#define TASK_SIZE UL(0xffffffff)
94
95#ifndef TASK_UNMAPPED_BASE
96#define TASK_UNMAPPED_BASE UL(0x00000000)
97#endif
98
99#ifndef END_MEM
100#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
101#endif
102
103
104
105
106#define MODULES_END (END_MEM)
107#define MODULES_VADDR PAGE_OFFSET
108
109#define XIP_VIRT_ADDR(physaddr) (physaddr)
110
111#endif
112
113#ifdef CONFIG_XIP_KERNEL
114#define KERNEL_START _sdata
115#else
116#define KERNEL_START _stext
117#endif
118#define KERNEL_END _end
119
120
121
122
123
124#ifdef CONFIG_HAVE_TCM
125#define ITCM_OFFSET UL(0xfffe0000)
126#define DTCM_OFFSET UL(0xfffe8000)
127#endif
128
129
130
131
132#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
133#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
134
135
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138
139
140
141#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
142
143#ifdef CONFIG_XIP_KERNEL
144
145
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147
148
149
150#define PHYS_RELATIVE(v_data, v_text) \
151 (((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \
152 ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \
153 CONFIG_XIP_PHYS_ADDR))
154#else
155#define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text))
156#endif
157
158#ifndef __ASSEMBLY__
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166
167
168
169#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
170
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174
175#define __PV_BITS_31_24 0x81000000
176#define __PV_BITS_7_0 0x81
177
178extern unsigned long __pv_phys_pfn_offset;
179extern u64 __pv_offset;
180extern void fixup_pv_table(const void *, unsigned long);
181extern const void *__pv_table_begin, *__pv_table_end;
182
183#define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
184#define PHYS_PFN_OFFSET (__pv_phys_pfn_offset)
185
186#define __pv_stub(from,to,instr,type) \
187 __asm__("@ __pv_stub\n" \
188 "1: " instr " %0, %1, %2\n" \
189 " .pushsection .pv_table,\"a\"\n" \
190 " .long 1b\n" \
191 " .popsection\n" \
192 : "=r" (to) \
193 : "r" (from), "I" (type))
194
195#define __pv_stub_mov_hi(t) \
196 __asm__ volatile("@ __pv_stub_mov\n" \
197 "1: mov %R0, %1\n" \
198 " .pushsection .pv_table,\"a\"\n" \
199 " .long 1b\n" \
200 " .popsection\n" \
201 : "=r" (t) \
202 : "I" (__PV_BITS_7_0))
203
204#define __pv_add_carry_stub(x, y) \
205 __asm__ volatile("@ __pv_add_carry_stub\n" \
206 "1: adds %Q0, %1, %2\n" \
207 " adc %R0, %R0, #0\n" \
208 " .pushsection .pv_table,\"a\"\n" \
209 " .long 1b\n" \
210 " .popsection\n" \
211 : "+r" (y) \
212 : "r" (x), "I" (__PV_BITS_31_24) \
213 : "cc")
214
215static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
216{
217 phys_addr_t t;
218
219 if (sizeof(phys_addr_t) == 4) {
220 __pv_stub(x, t, "add", __PV_BITS_31_24);
221 } else {
222 __pv_stub_mov_hi(t);
223 __pv_add_carry_stub(x, t);
224 }
225 return t;
226}
227
228static inline unsigned long __phys_to_virt(phys_addr_t x)
229{
230 unsigned long t;
231
232
233
234
235
236
237
238 __pv_stub((unsigned long) x, t, "sub", __PV_BITS_31_24);
239 return t;
240}
241
242#else
243
244#define PHYS_OFFSET PLAT_PHYS_OFFSET
245#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
246
247static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
248{
249 return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
250}
251
252static inline unsigned long __phys_to_virt(phys_addr_t x)
253{
254 return x - PHYS_OFFSET + PAGE_OFFSET;
255}
256
257#endif
258
259#define virt_to_pfn(kaddr) \
260 ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
261 PHYS_PFN_OFFSET)
262
263#define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x))
264
265#ifdef CONFIG_DEBUG_VIRTUAL
266extern phys_addr_t __virt_to_phys(unsigned long x);
267extern phys_addr_t __phys_addr_symbol(unsigned long x);
268#else
269#define __virt_to_phys(x) __virt_to_phys_nodebug(x)
270#define __phys_addr_symbol(x) __pa_symbol_nodebug(x)
271#endif
272
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278
279#define virt_to_phys virt_to_phys
280static inline phys_addr_t virt_to_phys(const volatile void *x)
281{
282 return __virt_to_phys((unsigned long)(x));
283}
284
285#define phys_to_virt phys_to_virt
286static inline void *phys_to_virt(phys_addr_t x)
287{
288 return (void *)__phys_to_virt(x);
289}
290
291
292
293
294#define __pa(x) __virt_to_phys((unsigned long)(x))
295#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
296#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
297#define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT)
298
299extern long long arch_phys_to_idmap_offset;
300
301
302
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304
305
306static inline bool arm_has_idmap_alias(void)
307{
308 return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
309}
310
311#define IDMAP_INVALID_ADDR ((u32)~0)
312
313static inline unsigned long phys_to_idmap(phys_addr_t addr)
314{
315 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
316 addr += arch_phys_to_idmap_offset;
317 if (addr > (u32)~0)
318 addr = IDMAP_INVALID_ADDR;
319 }
320 return addr;
321}
322
323static inline phys_addr_t idmap_to_phys(unsigned long idmap)
324{
325 phys_addr_t addr = idmap;
326
327 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset)
328 addr -= arch_phys_to_idmap_offset;
329
330 return addr;
331}
332
333static inline unsigned long __virt_to_idmap(unsigned long x)
334{
335 return phys_to_idmap(__virt_to_phys(x));
336}
337
338#define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))
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345
346#ifndef __virt_to_bus
347#define __virt_to_bus __virt_to_phys
348#define __bus_to_virt __phys_to_virt
349#define __pfn_to_bus(x) __pfn_to_phys(x)
350#define __bus_to_pfn(x) __phys_to_pfn(x)
351#endif
352
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359
360
361
362#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
363
364#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
365#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
366 && pfn_valid(virt_to_pfn(kaddr)))
367
368#endif
369
370#include <asm-generic/memory_model.h>
371
372#endif
373