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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm/include/asm/memory.h
4 *
5 * Copyright (C) 2000-2002 Russell King
6 * modification for nommu, Hyok S. Choi, 2004
7 *
8 * Note: this file should not be included by non-asm/.h files
9 */
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/* PAGE_OFFSET - the virtual address of the start of the kernel image */
23#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
24
25#ifdef CONFIG_MMU
26
27/*
28 * TASK_SIZE - the maximum size of a user space task.
29 * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
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 * The maximum size of a 26-bit user space task.
36 */
37#define TASK_SIZE_26 (UL(1) << 26)
38
39/*
40 * The module space lives between the addresses given by TASK_SIZE
41 * and PAGE_OFFSET - it must be within 32MB of the kernel text.
42 */
43#ifndef CONFIG_THUMB2_KERNEL
44#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
45#else
46/* smaller range for Thumb-2 symbols relocation (2^24)*/
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 * The highmem pkmap virtual space shares the end of the module area.
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 * The XIP kernel gets mapped at the bottom of the module vm area.
65 * Since we use sections to map it, this macro replaces the physical address
66 * with its virtual address while keeping offset from the base section.
67 */
68#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
69
70#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
71/*
72 * Allow 16MB-aligned ioremap pages
73 */
74#define IOREMAP_MAX_ORDER 24
75#endif
76
77#define VECTORS_BASE UL(0xffff0000)
78
79#else /* CONFIG_MMU */
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 * The limitation of user task size can grow up to the end of free ram region.
89 * It is difficult to define and perhaps will never meet the original meaning
90 * of this define that was meant to.
91 * Fortunately, there is no reference for this in noMMU mode, for now.
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 * The module can be at any place in ram in nommu mode.
105 */
106#define MODULES_END (END_MEM)
107#define MODULES_VADDR PAGE_OFFSET
108
109#define XIP_VIRT_ADDR(physaddr) (physaddr)
110
111#endif /* !CONFIG_MMU */
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 * We fix the TCM memories max 32 KiB ITCM resp DTCM at these
122 * locations
123 */
124#ifdef CONFIG_HAVE_TCM
125#define ITCM_OFFSET UL(0xfffe0000)
126#define DTCM_OFFSET UL(0xfffe8000)
127#endif
128
129/*
130 * Convert a page to/from a physical address
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/*
136 * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
137 * memory. This is used for XIP and NoMMU kernels, and on platforms that don't
138 * have CONFIG_ARM_PATCH_PHYS_VIRT. Assembly code must always use
139 * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
140 */
141#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
142
143#ifdef CONFIG_XIP_KERNEL
144/*
145 * When referencing data in RAM from the XIP region in a relative manner
146 * with the MMU off, we need the relative offset between the two physical
147 * addresses. The macro below achieves this, which is:
148 * __pa(v_data) - __xip_pa(v_text)
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__
159
160/*
161 * Physical vs virtual RAM address space conversion. These are
162 * private definitions which should NOT be used outside memory.h
163 * files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
164 *
165 * PFNs are used to describe any physical page; this means
166 * PFN 0 == physical address 0.
167 */
168
169#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
170
171/*
172 * Constants used to force the right instruction encodings and shifts
173 * so that all we need to do is modify the 8-bit constant field.
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 * 'unsigned long' cast discard upper word when
234 * phys_addr_t is 64 bit, and makes sure that inline
235 * assembler expression receives 32 bit argument
236 * in place where 'r' 32 bit operand is expected.
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
273/*
274 * These are *only* valid on the kernel direct mapped RAM memory.
275 * Note: Drivers should NOT use these. They are the wrong
276 * translation for translating DMA addresses. Use the driver
277 * DMA support - see dma-mapping.h.
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 * Drivers should NOT use these either.
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 * These are for systems that have a hardware interconnect supported alias
303 * of physical memory for idmap purposes. Most cases should leave these
304 * untouched. Note: this can only return addresses less than 4GiB.
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))
339
340/*
341 * Virtual <-> DMA view memory address translations
342 * Again, these are *only* valid on the kernel direct mapped RAM
343 * memory. Use of these is *deprecated* (and that doesn't mean
344 * use the __ prefixed forms instead.) See dma-mapping.h.
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
353/*
354 * Conversion between a struct page and a physical address.
355 *
356 * page_to_pfn(page) convert a struct page * to a PFN number
357 * pfn_to_page(pfn) convert a _valid_ PFN number to struct page *
358 *
359 * virt_to_page(k) convert a _valid_ virtual address to struct page *
360 * virt_addr_valid(k) indicates whether a virtual address is valid
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
1/*
2 * arch/arm/include/asm/memory.h
3 *
4 * Copyright (C) 2000-2002 Russell King
5 * modification for nommu, Hyok S. Choi, 2004
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Note: this file should not be included by non-asm/.h files
12 */
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/* PAGE_OFFSET - the virtual address of the start of the kernel image */
26#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
27
28#ifdef CONFIG_MMU
29
30/*
31 * TASK_SIZE - the maximum size of a user space task.
32 * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
33 */
34#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
35#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
36
37/*
38 * The maximum size of a 26-bit user space task.
39 */
40#define TASK_SIZE_26 (UL(1) << 26)
41
42/*
43 * The module space lives between the addresses given by TASK_SIZE
44 * and PAGE_OFFSET - it must be within 32MB of the kernel text.
45 */
46#ifndef CONFIG_THUMB2_KERNEL
47#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
48#else
49/* smaller range for Thumb-2 symbols relocation (2^24)*/
50#define MODULES_VADDR (PAGE_OFFSET - SZ_8M)
51#endif
52
53#if TASK_SIZE > MODULES_VADDR
54#error Top of user space clashes with start of module space
55#endif
56
57/*
58 * The highmem pkmap virtual space shares the end of the module area.
59 */
60#ifdef CONFIG_HIGHMEM
61#define MODULES_END (PAGE_OFFSET - PMD_SIZE)
62#else
63#define MODULES_END (PAGE_OFFSET)
64#endif
65
66/*
67 * The XIP kernel gets mapped at the bottom of the module vm area.
68 * Since we use sections to map it, this macro replaces the physical address
69 * with its virtual address while keeping offset from the base section.
70 */
71#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
72
73#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
74/*
75 * Allow 16MB-aligned ioremap pages
76 */
77#define IOREMAP_MAX_ORDER 24
78#endif
79
80#define VECTORS_BASE UL(0xffff0000)
81
82#else /* CONFIG_MMU */
83
84#ifndef __ASSEMBLY__
85extern unsigned long setup_vectors_base(void);
86extern unsigned long vectors_base;
87#define VECTORS_BASE vectors_base
88#endif
89
90/*
91 * The limitation of user task size can grow up to the end of free ram region.
92 * It is difficult to define and perhaps will never meet the original meaning
93 * of this define that was meant to.
94 * Fortunately, there is no reference for this in noMMU mode, for now.
95 */
96#define TASK_SIZE UL(0xffffffff)
97
98#ifndef TASK_UNMAPPED_BASE
99#define TASK_UNMAPPED_BASE UL(0x00000000)
100#endif
101
102#ifndef END_MEM
103#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
104#endif
105
106/*
107 * The module can be at any place in ram in nommu mode.
108 */
109#define MODULES_END (END_MEM)
110#define MODULES_VADDR PAGE_OFFSET
111
112#define XIP_VIRT_ADDR(physaddr) (physaddr)
113
114#endif /* !CONFIG_MMU */
115
116#ifdef CONFIG_XIP_KERNEL
117#define KERNEL_START _sdata
118#else
119#define KERNEL_START _stext
120#endif
121#define KERNEL_END _end
122
123/*
124 * We fix the TCM memories max 32 KiB ITCM resp DTCM at these
125 * locations
126 */
127#ifdef CONFIG_HAVE_TCM
128#define ITCM_OFFSET UL(0xfffe0000)
129#define DTCM_OFFSET UL(0xfffe8000)
130#endif
131
132/*
133 * Convert a page to/from a physical address
134 */
135#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
136#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
137
138/*
139 * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
140 * memory. This is used for XIP and NoMMU kernels, and on platforms that don't
141 * have CONFIG_ARM_PATCH_PHYS_VIRT. Assembly code must always use
142 * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
143 */
144#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
145
146#ifdef CONFIG_XIP_KERNEL
147/*
148 * When referencing data in RAM from the XIP region in a relative manner
149 * with the MMU off, we need the relative offset between the two physical
150 * addresses. The macro below achieves this, which is:
151 * __pa(v_data) - __xip_pa(v_text)
152 */
153#define PHYS_RELATIVE(v_data, v_text) \
154 (((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \
155 ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \
156 CONFIG_XIP_PHYS_ADDR))
157#else
158#define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text))
159#endif
160
161#ifndef __ASSEMBLY__
162
163/*
164 * Physical vs virtual RAM address space conversion. These are
165 * private definitions which should NOT be used outside memory.h
166 * files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
167 *
168 * PFNs are used to describe any physical page; this means
169 * PFN 0 == physical address 0.
170 */
171
172#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
173
174/*
175 * Constants used to force the right instruction encodings and shifts
176 * so that all we need to do is modify the 8-bit constant field.
177 */
178#define __PV_BITS_31_24 0x81000000
179#define __PV_BITS_7_0 0x81
180
181extern unsigned long __pv_phys_pfn_offset;
182extern u64 __pv_offset;
183extern void fixup_pv_table(const void *, unsigned long);
184extern const void *__pv_table_begin, *__pv_table_end;
185
186#define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
187#define PHYS_PFN_OFFSET (__pv_phys_pfn_offset)
188
189#define __pv_stub(from,to,instr,type) \
190 __asm__("@ __pv_stub\n" \
191 "1: " instr " %0, %1, %2\n" \
192 " .pushsection .pv_table,\"a\"\n" \
193 " .long 1b\n" \
194 " .popsection\n" \
195 : "=r" (to) \
196 : "r" (from), "I" (type))
197
198#define __pv_stub_mov_hi(t) \
199 __asm__ volatile("@ __pv_stub_mov\n" \
200 "1: mov %R0, %1\n" \
201 " .pushsection .pv_table,\"a\"\n" \
202 " .long 1b\n" \
203 " .popsection\n" \
204 : "=r" (t) \
205 : "I" (__PV_BITS_7_0))
206
207#define __pv_add_carry_stub(x, y) \
208 __asm__ volatile("@ __pv_add_carry_stub\n" \
209 "1: adds %Q0, %1, %2\n" \
210 " adc %R0, %R0, #0\n" \
211 " .pushsection .pv_table,\"a\"\n" \
212 " .long 1b\n" \
213 " .popsection\n" \
214 : "+r" (y) \
215 : "r" (x), "I" (__PV_BITS_31_24) \
216 : "cc")
217
218static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
219{
220 phys_addr_t t;
221
222 if (sizeof(phys_addr_t) == 4) {
223 __pv_stub(x, t, "add", __PV_BITS_31_24);
224 } else {
225 __pv_stub_mov_hi(t);
226 __pv_add_carry_stub(x, t);
227 }
228 return t;
229}
230
231static inline unsigned long __phys_to_virt(phys_addr_t x)
232{
233 unsigned long t;
234
235 /*
236 * 'unsigned long' cast discard upper word when
237 * phys_addr_t is 64 bit, and makes sure that inline
238 * assembler expression receives 32 bit argument
239 * in place where 'r' 32 bit operand is expected.
240 */
241 __pv_stub((unsigned long) x, t, "sub", __PV_BITS_31_24);
242 return t;
243}
244
245#else
246
247#define PHYS_OFFSET PLAT_PHYS_OFFSET
248#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
249
250static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
251{
252 return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
253}
254
255static inline unsigned long __phys_to_virt(phys_addr_t x)
256{
257 return x - PHYS_OFFSET + PAGE_OFFSET;
258}
259
260#endif
261
262#define virt_to_pfn(kaddr) \
263 ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
264 PHYS_PFN_OFFSET)
265
266#define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x))
267
268#ifdef CONFIG_DEBUG_VIRTUAL
269extern phys_addr_t __virt_to_phys(unsigned long x);
270extern phys_addr_t __phys_addr_symbol(unsigned long x);
271#else
272#define __virt_to_phys(x) __virt_to_phys_nodebug(x)
273#define __phys_addr_symbol(x) __pa_symbol_nodebug(x)
274#endif
275
276/*
277 * These are *only* valid on the kernel direct mapped RAM memory.
278 * Note: Drivers should NOT use these. They are the wrong
279 * translation for translating DMA addresses. Use the driver
280 * DMA support - see dma-mapping.h.
281 */
282#define virt_to_phys virt_to_phys
283static inline phys_addr_t virt_to_phys(const volatile void *x)
284{
285 return __virt_to_phys((unsigned long)(x));
286}
287
288#define phys_to_virt phys_to_virt
289static inline void *phys_to_virt(phys_addr_t x)
290{
291 return (void *)__phys_to_virt(x);
292}
293
294/*
295 * Drivers should NOT use these either.
296 */
297#define __pa(x) __virt_to_phys((unsigned long)(x))
298#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
299#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
300#define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT)
301
302extern long long arch_phys_to_idmap_offset;
303
304/*
305 * These are for systems that have a hardware interconnect supported alias
306 * of physical memory for idmap purposes. Most cases should leave these
307 * untouched. Note: this can only return addresses less than 4GiB.
308 */
309static inline bool arm_has_idmap_alias(void)
310{
311 return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
312}
313
314#define IDMAP_INVALID_ADDR ((u32)~0)
315
316static inline unsigned long phys_to_idmap(phys_addr_t addr)
317{
318 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
319 addr += arch_phys_to_idmap_offset;
320 if (addr > (u32)~0)
321 addr = IDMAP_INVALID_ADDR;
322 }
323 return addr;
324}
325
326static inline phys_addr_t idmap_to_phys(unsigned long idmap)
327{
328 phys_addr_t addr = idmap;
329
330 if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset)
331 addr -= arch_phys_to_idmap_offset;
332
333 return addr;
334}
335
336static inline unsigned long __virt_to_idmap(unsigned long x)
337{
338 return phys_to_idmap(__virt_to_phys(x));
339}
340
341#define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))
342
343/*
344 * Virtual <-> DMA view memory address translations
345 * Again, these are *only* valid on the kernel direct mapped RAM
346 * memory. Use of these is *deprecated* (and that doesn't mean
347 * use the __ prefixed forms instead.) See dma-mapping.h.
348 */
349#ifndef __virt_to_bus
350#define __virt_to_bus __virt_to_phys
351#define __bus_to_virt __phys_to_virt
352#define __pfn_to_bus(x) __pfn_to_phys(x)
353#define __bus_to_pfn(x) __phys_to_pfn(x)
354#endif
355
356/*
357 * Conversion between a struct page and a physical address.
358 *
359 * page_to_pfn(page) convert a struct page * to a PFN number
360 * pfn_to_page(pfn) convert a _valid_ PFN number to struct page *
361 *
362 * virt_to_page(k) convert a _valid_ virtual address to struct page *
363 * virt_addr_valid(k) indicates whether a virtual address is valid
364 */
365#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
366
367#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
368#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
369 && pfn_valid(virt_to_pfn(kaddr)))
370
371#endif
372
373#include <asm-generic/memory_model.h>
374
375#endif