1d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */
24baa9922SRussell King /*
34baa9922SRussell King * arch/arm/include/asm/memory.h
44baa9922SRussell King *
54baa9922SRussell King * Copyright (C) 2000-2002 Russell King
64baa9922SRussell King * modification for nommu, Hyok S. Choi, 2004
74baa9922SRussell King *
8*a9ff6961SLinus Walleij * Note: this file should not be included explicitly, include <asm/page.h>
9*a9ff6961SLinus Walleij * to get access to these definitions.
104baa9922SRussell King */
114baa9922SRussell King #ifndef __ASM_ARM_MEMORY_H
124baa9922SRussell King #define __ASM_ARM_MEMORY_H
134baa9922SRussell King
14*a9ff6961SLinus Walleij #ifndef _ASMARM_PAGE_H
15*a9ff6961SLinus Walleij #error "Do not include <asm/memory.h> directly"
16*a9ff6961SLinus Walleij #endif
17*a9ff6961SLinus Walleij
188d5796d2SLennert Buytenhek #include <linux/compiler.h>
198d5796d2SLennert Buytenhek #include <linux/const.h>
203a6b1676SWill Deacon #include <linux/types.h>
21158e8bfeSAlessandro Rubini #include <linux/sizes.h>
228d5796d2SLennert Buytenhek
230cdc8b92SNicolas Pitre #ifdef CONFIG_NEED_MACH_MEMORY_H
241b9f95f8SNicolas Pitre #include <mach/memory.h>
251b9f95f8SNicolas Pitre #endif
26c12366baSLinus Walleij #include <asm/kasan_def.h>
271b9f95f8SNicolas Pitre
28b78f63f4SLinus Walleij /*
29b78f63f4SLinus Walleij * PAGE_OFFSET: the virtual address of the start of lowmem, memory above
30b78f63f4SLinus Walleij * the virtual address range for userspace.
31b78f63f4SLinus Walleij * KERNEL_OFFSET: the virtual address of the start of the kernel image.
32b78f63f4SLinus Walleij * we may further offset this with TEXT_OFFSET in practice.
33b78f63f4SLinus Walleij */
34006fa259SRussell King #define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
35b78f63f4SLinus Walleij #define KERNEL_OFFSET (PAGE_OFFSET)
36006fa259SRussell King
374baa9922SRussell King #ifdef CONFIG_MMU
384baa9922SRussell King
394baa9922SRussell King /*
404baa9922SRussell King * TASK_SIZE - the maximum size of a user space task.
414baa9922SRussell King * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
424baa9922SRussell King */
43c12366baSLinus Walleij #ifndef CONFIG_KASAN
445d1c20bcSWill Deacon #define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
45c12366baSLinus Walleij #else
46c12366baSLinus Walleij #define TASK_SIZE (KASAN_SHADOW_START)
47c12366baSLinus Walleij #endif
4879d1f5c9SWill Deacon #define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
494baa9922SRussell King
504baa9922SRussell King /*
514baa9922SRussell King * The maximum size of a 26-bit user space task.
524baa9922SRussell King */
535d1c20bcSWill Deacon #define TASK_SIZE_26 (UL(1) << 26)
544baa9922SRussell King
554baa9922SRussell King /*
564baa9922SRussell King * The module space lives between the addresses given by TASK_SIZE
574baa9922SRussell King * and PAGE_OFFSET - it must be within 32MB of the kernel text.
584baa9922SRussell King */
59adca6dc2SCatalin Marinas #ifndef CONFIG_THUMB2_KERNEL
605d1c20bcSWill Deacon #define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
61adca6dc2SCatalin Marinas #else
62adca6dc2SCatalin Marinas /* smaller range for Thumb-2 symbols relocation (2^24)*/
635d1c20bcSWill Deacon #define MODULES_VADDR (PAGE_OFFSET - SZ_8M)
64adca6dc2SCatalin Marinas #endif
65adca6dc2SCatalin Marinas
66ab4f2ee1SRussell King #if TASK_SIZE > MODULES_VADDR
674baa9922SRussell King #error Top of user space clashes with start of module space
684baa9922SRussell King #endif
694baa9922SRussell King
704baa9922SRussell King /*
71d73cd428SNicolas Pitre * The highmem pkmap virtual space shares the end of the module area.
72d73cd428SNicolas Pitre */
73d73cd428SNicolas Pitre #ifdef CONFIG_HIGHMEM
74d73cd428SNicolas Pitre #define MODULES_END (PAGE_OFFSET - PMD_SIZE)
75d73cd428SNicolas Pitre #else
76d73cd428SNicolas Pitre #define MODULES_END (PAGE_OFFSET)
77d73cd428SNicolas Pitre #endif
78d73cd428SNicolas Pitre
79d73cd428SNicolas Pitre /*
804baa9922SRussell King * The XIP kernel gets mapped at the bottom of the module vm area.
814baa9922SRussell King * Since we use sections to map it, this macro replaces the physical address
824baa9922SRussell King * with its virtual address while keeping offset from the base section.
834baa9922SRussell King */
84ab4f2ee1SRussell King #define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
854baa9922SRussell King
867a1be318SArd Biesheuvel #define FDT_FIXED_BASE UL(0xff800000)
87fc2933c1SArd Biesheuvel #define FDT_FIXED_SIZE (2 * SECTION_SIZE)
88fc2933c1SArd Biesheuvel #define FDT_VIRT_BASE(physbase) ((void *)(FDT_FIXED_BASE | (physbase) % SECTION_SIZE))
897a1be318SArd Biesheuvel
90803e3dbcSSergey Dyasly #if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
914baa9922SRussell King /*
924baa9922SRussell King * Allow 16MB-aligned ioremap pages
934baa9922SRussell King */
944baa9922SRussell King #define IOREMAP_MAX_ORDER 24
95803e3dbcSSergey Dyasly #endif
964baa9922SRussell King
9758c16709SAfzal Mohammed #define VECTORS_BASE UL(0xffff0000)
9858c16709SAfzal Mohammed
994baa9922SRussell King #else /* CONFIG_MMU */
1004baa9922SRussell King
10158c16709SAfzal Mohammed #ifndef __ASSEMBLY__
10262d1c95dSVladimir Murzin extern unsigned long setup_vectors_base(void);
10358c16709SAfzal Mohammed extern unsigned long vectors_base;
10458c16709SAfzal Mohammed #define VECTORS_BASE vectors_base
10558c16709SAfzal Mohammed #endif
10658c16709SAfzal Mohammed
1074baa9922SRussell King /*
1084baa9922SRussell King * The limitation of user task size can grow up to the end of free ram region.
1094baa9922SRussell King * It is difficult to define and perhaps will never meet the original meaning
1104baa9922SRussell King * of this define that was meant to.
1114baa9922SRussell King * Fortunately, there is no reference for this in noMMU mode, for now.
1124baa9922SRussell King */
11303eca200SUwe Kleine-König #define TASK_SIZE UL(0xffffffff)
1144baa9922SRussell King
1154baa9922SRussell King #ifndef TASK_UNMAPPED_BASE
1164baa9922SRussell King #define TASK_UNMAPPED_BASE UL(0x00000000)
1174baa9922SRussell King #endif
1184baa9922SRussell King
1194baa9922SRussell King #ifndef END_MEM
120c931b4f6SFenkart/Bostandzhyan #define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
1214baa9922SRussell King #endif
1224baa9922SRussell King
1234baa9922SRussell King /*
1244baa9922SRussell King * The module can be at any place in ram in nommu mode.
1254baa9922SRussell King */
126ab4f2ee1SRussell King #define MODULES_END (END_MEM)
127b713aa0bSRussell King #define MODULES_VADDR PAGE_OFFSET
1284baa9922SRussell King
12938b4205aSUwe Kleine-König #define XIP_VIRT_ADDR(physaddr) (physaddr)
130fc2933c1SArd Biesheuvel #define FDT_VIRT_BASE(physbase) ((void *)(physbase))
13138b4205aSUwe Kleine-König
1324baa9922SRussell King #endif /* !CONFIG_MMU */
1334baa9922SRussell King
134a09975bfSFlorian Fainelli #ifdef CONFIG_XIP_KERNEL
135a09975bfSFlorian Fainelli #define KERNEL_START _sdata
136a09975bfSFlorian Fainelli #else
137a09975bfSFlorian Fainelli #define KERNEL_START _stext
138a09975bfSFlorian Fainelli #endif
139a09975bfSFlorian Fainelli #define KERNEL_END _end
140a09975bfSFlorian Fainelli
1414baa9922SRussell King /*
1421dbd30e9SLinus Walleij * We fix the TCM memories max 32 KiB ITCM resp DTCM at these
1431dbd30e9SLinus Walleij * locations
1441dbd30e9SLinus Walleij */
1451dbd30e9SLinus Walleij #ifdef CONFIG_HAVE_TCM
1461dbd30e9SLinus Walleij #define ITCM_OFFSET UL(0xfffe0000)
1471dbd30e9SLinus Walleij #define DTCM_OFFSET UL(0xfffe8000)
1481dbd30e9SLinus Walleij #endif
1491dbd30e9SLinus Walleij
1501dbd30e9SLinus Walleij /*
151719301ffSRussell King * Convert a page to/from a physical address
152719301ffSRussell King */
153719301ffSRussell King #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
154719301ffSRussell King #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
155719301ffSRussell King
1564756dcbfSCyril Chemparathy /*
157b713aa0bSRussell King * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
158c6f54a9bSUwe Kleine-König * memory. This is used for XIP and NoMMU kernels, and on platforms that don't
159c6f54a9bSUwe Kleine-König * have CONFIG_ARM_PATCH_PHYS_VIRT. Assembly code must always use
160b713aa0bSRussell King * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
161b713aa0bSRussell King */
162b713aa0bSRussell King #define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
163b713aa0bSRussell King
1644baa9922SRussell King #ifndef __ASSEMBLY__
1654baa9922SRussell King
1664baa9922SRussell King /*
167a91da545SLinus Walleij * Physical start and end address of the kernel sections. These addresses are
168463dbba4SLinus Walleij * 2MB-aligned to match the section mappings placed over the kernel. We use
169463dbba4SLinus Walleij * u64 so that LPAE mappings beyond the 32bit limit will work out as well.
170a91da545SLinus Walleij */
171463dbba4SLinus Walleij extern u64 kernel_sec_start;
172463dbba4SLinus Walleij extern u64 kernel_sec_end;
173a91da545SLinus Walleij
174a91da545SLinus Walleij /*
175dc21af99SRussell King * Physical vs virtual RAM address space conversion. These are
176dc21af99SRussell King * private definitions which should NOT be used outside memory.h
177dc21af99SRussell King * files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
178e26a9e00SRussell King *
179e26a9e00SRussell King * PFNs are used to describe any physical page; this means
180e26a9e00SRussell King * PFN 0 == physical address 0.
181dc21af99SRussell King */
182e26a9e00SRussell King
1837d281b62SNicolas Pitre #if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
184dc21af99SRussell King
185cada3c08SRussell King /*
186cada3c08SRussell King * Constants used to force the right instruction encodings and shifts
187cada3c08SRussell King * so that all we need to do is modify the 8-bit constant field.
188cada3c08SRussell King */
189cada3c08SRussell King #define __PV_BITS_31_24 0x81000000
1909443076eSArd Biesheuvel #define __PV_BITS_23_16 0x810000
191f52bb722SSricharan R #define __PV_BITS_7_0 0x81
192cada3c08SRussell King
193e26a9e00SRussell King extern unsigned long __pv_phys_pfn_offset;
194f52bb722SSricharan R extern u64 __pv_offset;
195f52bb722SSricharan R extern void fixup_pv_table(const void *, unsigned long);
196f52bb722SSricharan R extern const void *__pv_table_begin, *__pv_table_end;
197f52bb722SSricharan R
198e26a9e00SRussell King #define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
199e26a9e00SRussell King #define PHYS_PFN_OFFSET (__pv_phys_pfn_offset)
200e26a9e00SRussell King
201e8e00f5aSArd Biesheuvel #ifndef CONFIG_THUMB2_KERNEL
2020869f3b9SArd Biesheuvel #define __pv_stub(from,to,instr) \
203dc21af99SRussell King __asm__("@ __pv_stub\n" \
204dc21af99SRussell King "1: " instr " %0, %1, %2\n" \
2059443076eSArd Biesheuvel "2: " instr " %0, %0, %3\n" \
206dc21af99SRussell King " .pushsection .pv_table,\"a\"\n" \
2079443076eSArd Biesheuvel " .long 1b - ., 2b - .\n" \
208dc21af99SRussell King " .popsection\n" \
209dc21af99SRussell King : "=r" (to) \
2109443076eSArd Biesheuvel : "r" (from), "I" (__PV_BITS_31_24), \
2119443076eSArd Biesheuvel "I"(__PV_BITS_23_16))
212f52bb722SSricharan R
213f52bb722SSricharan R #define __pv_add_carry_stub(x, y) \
214e8e00f5aSArd Biesheuvel __asm__("@ __pv_add_carry_stub\n" \
215e8e00f5aSArd Biesheuvel "0: movw %R0, #0\n" \
2169443076eSArd Biesheuvel " adds %Q0, %1, %R0, lsl #20\n" \
217e8e00f5aSArd Biesheuvel "1: mov %R0, %2\n" \
218f52bb722SSricharan R " adc %R0, %R0, #0\n" \
219f52bb722SSricharan R " .pushsection .pv_table,\"a\"\n" \
220e8e00f5aSArd Biesheuvel " .long 0b - ., 1b - .\n" \
221f52bb722SSricharan R " .popsection\n" \
222e8e00f5aSArd Biesheuvel : "=&r" (y) \
223e8e00f5aSArd Biesheuvel : "r" (x), "I" (__PV_BITS_7_0) \
224f52bb722SSricharan R : "cc")
225f52bb722SSricharan R
226e8e00f5aSArd Biesheuvel #else
227e8e00f5aSArd Biesheuvel #define __pv_stub(from,to,instr) \
228e8e00f5aSArd Biesheuvel __asm__("@ __pv_stub\n" \
229e8e00f5aSArd Biesheuvel "0: movw %0, #0\n" \
2309443076eSArd Biesheuvel " lsl %0, #21\n" \
231e8e00f5aSArd Biesheuvel " " instr " %0, %1, %0\n" \
232e8e00f5aSArd Biesheuvel " .pushsection .pv_table,\"a\"\n" \
233e8e00f5aSArd Biesheuvel " .long 0b - .\n" \
234e8e00f5aSArd Biesheuvel " .popsection\n" \
235e8e00f5aSArd Biesheuvel : "=&r" (to) \
236e8e00f5aSArd Biesheuvel : "r" (from))
237e8e00f5aSArd Biesheuvel
238e8e00f5aSArd Biesheuvel #define __pv_add_carry_stub(x, y) \
239e8e00f5aSArd Biesheuvel __asm__("@ __pv_add_carry_stub\n" \
240e8e00f5aSArd Biesheuvel "0: movw %R0, #0\n" \
2419443076eSArd Biesheuvel " lsls %R0, #21\n" \
242e8e00f5aSArd Biesheuvel " adds %Q0, %1, %R0\n" \
243e8e00f5aSArd Biesheuvel "1: mvn %R0, #0\n" \
244e8e00f5aSArd Biesheuvel " adc %R0, %R0, #0\n" \
245e8e00f5aSArd Biesheuvel " .pushsection .pv_table,\"a\"\n" \
246e8e00f5aSArd Biesheuvel " .long 0b - ., 1b - .\n" \
247e8e00f5aSArd Biesheuvel " .popsection\n" \
248e8e00f5aSArd Biesheuvel : "=&r" (y) \
249e8e00f5aSArd Biesheuvel : "r" (x) \
250e8e00f5aSArd Biesheuvel : "cc")
251e8e00f5aSArd Biesheuvel #endif
252e8e00f5aSArd Biesheuvel
__virt_to_phys_nodebug(unsigned long x)253e377cd82SFlorian Fainelli static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
254dc21af99SRussell King {
255f52bb722SSricharan R phys_addr_t t;
256f52bb722SSricharan R
257f52bb722SSricharan R if (sizeof(phys_addr_t) == 4) {
2580869f3b9SArd Biesheuvel __pv_stub(x, t, "add");
259f52bb722SSricharan R } else {
260f52bb722SSricharan R __pv_add_carry_stub(x, t);
261f52bb722SSricharan R }
262dc21af99SRussell King return t;
263dc21af99SRussell King }
264dc21af99SRussell King
__phys_to_virt(phys_addr_t x)265ca5a45c0SSantosh Shilimkar static inline unsigned long __phys_to_virt(phys_addr_t x)
266dc21af99SRussell King {
267dc21af99SRussell King unsigned long t;
268139cc2baSVictor Kamensky
269139cc2baSVictor Kamensky /*
270139cc2baSVictor Kamensky * 'unsigned long' cast discard upper word when
271139cc2baSVictor Kamensky * phys_addr_t is 64 bit, and makes sure that inline
272139cc2baSVictor Kamensky * assembler expression receives 32 bit argument
273139cc2baSVictor Kamensky * in place where 'r' 32 bit operand is expected.
274139cc2baSVictor Kamensky */
2750869f3b9SArd Biesheuvel __pv_stub((unsigned long) x, t, "sub");
276dc21af99SRussell King return t;
277dc21af99SRussell King }
278ca5a45c0SSantosh Shilimkar
279dc21af99SRussell King #else
280ca5a45c0SSantosh Shilimkar
281b713aa0bSRussell King #define PHYS_OFFSET PLAT_PHYS_OFFSET
282e26a9e00SRussell King #define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
283b713aa0bSRussell King
__virt_to_phys_nodebug(unsigned long x)284e377cd82SFlorian Fainelli static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
285ca5a45c0SSantosh Shilimkar {
286ca5a45c0SSantosh Shilimkar return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
287ca5a45c0SSantosh Shilimkar }
288ca5a45c0SSantosh Shilimkar
__phys_to_virt(phys_addr_t x)289ca5a45c0SSantosh Shilimkar static inline unsigned long __phys_to_virt(phys_addr_t x)
290ca5a45c0SSantosh Shilimkar {
291ca5a45c0SSantosh Shilimkar return x - PHYS_OFFSET + PAGE_OFFSET;
292ca5a45c0SSantosh Shilimkar }
293ca5a45c0SSantosh Shilimkar
2947d281b62SNicolas Pitre #endif
2957d281b62SNicolas Pitre
virt_to_pfn(const void * p)296*a9ff6961SLinus Walleij static inline unsigned long virt_to_pfn(const void *p)
297*a9ff6961SLinus Walleij {
298*a9ff6961SLinus Walleij unsigned long kaddr = (unsigned long)p;
299*a9ff6961SLinus Walleij return (((kaddr - PAGE_OFFSET) >> PAGE_SHIFT) +
300*a9ff6961SLinus Walleij PHYS_PFN_OFFSET);
301*a9ff6961SLinus Walleij }
302e377cd82SFlorian Fainelli #define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x))
303e377cd82SFlorian Fainelli
304e377cd82SFlorian Fainelli #ifdef CONFIG_DEBUG_VIRTUAL
305e377cd82SFlorian Fainelli extern phys_addr_t __virt_to_phys(unsigned long x);
306e377cd82SFlorian Fainelli extern phys_addr_t __phys_addr_symbol(unsigned long x);
307e377cd82SFlorian Fainelli #else
308e377cd82SFlorian Fainelli #define __virt_to_phys(x) __virt_to_phys_nodebug(x)
309e377cd82SFlorian Fainelli #define __phys_addr_symbol(x) __pa_symbol_nodebug(x)
310e377cd82SFlorian Fainelli #endif
311e377cd82SFlorian Fainelli
3124baa9922SRussell King /*
3134baa9922SRussell King * These are *only* valid on the kernel direct mapped RAM memory.
3144baa9922SRussell King * Note: Drivers should NOT use these. They are the wrong
3154baa9922SRussell King * translation for translating DMA addresses. Use the driver
3164baa9922SRussell King * DMA support - see dma-mapping.h.
3174baa9922SRussell King */
31884c4d3a6SThierry Reding #define virt_to_phys virt_to_phys
virt_to_phys(const volatile void * x)3193a6b1676SWill Deacon static inline phys_addr_t virt_to_phys(const volatile void *x)
3204baa9922SRussell King {
3214baa9922SRussell King return __virt_to_phys((unsigned long)(x));
3224baa9922SRussell King }
3234baa9922SRussell King
32484c4d3a6SThierry Reding #define phys_to_virt phys_to_virt
phys_to_virt(phys_addr_t x)3253a6b1676SWill Deacon static inline void *phys_to_virt(phys_addr_t x)
3264baa9922SRussell King {
327ca5a45c0SSantosh Shilimkar return (void *)__phys_to_virt(x);
3284baa9922SRussell King }
3294baa9922SRussell King
3304baa9922SRussell King /*
3314baa9922SRussell King * Drivers should NOT use these either.
3324baa9922SRussell King */
3334baa9922SRussell King #define __pa(x) __virt_to_phys((unsigned long)(x))
334e377cd82SFlorian Fainelli #define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
335ca5a45c0SSantosh Shilimkar #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
336e4886664SVitaly Andrianov #define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT)
3374baa9922SRussell King
338981b6714SRussell King extern long long arch_phys_to_idmap_offset;
3395e4432d3SRussell King
3404baa9922SRussell King /*
341981b6714SRussell King * These are for systems that have a hardware interconnect supported alias
342981b6714SRussell King * of physical memory for idmap purposes. Most cases should leave these
34328410293SRussell King * untouched. Note: this can only return addresses less than 4GiB.
3444dc9a817SSantosh Shilimkar */
arm_has_idmap_alias(void)34507a7056cSRussell King static inline bool arm_has_idmap_alias(void)
34607a7056cSRussell King {
34707a7056cSRussell King return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
34807a7056cSRussell King }
34907a7056cSRussell King
350981b6714SRussell King #define IDMAP_INVALID_ADDR ((u32)~0)
351981b6714SRussell King
phys_to_idmap(phys_addr_t addr)352981b6714SRussell King static inline unsigned long phys_to_idmap(phys_addr_t addr)
353981b6714SRussell King {
354981b6714SRussell King if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
355981b6714SRussell King addr += arch_phys_to_idmap_offset;
356981b6714SRussell King if (addr > (u32)~0)
357981b6714SRussell King addr = IDMAP_INVALID_ADDR;
358981b6714SRussell King }
359981b6714SRussell King return addr;
360981b6714SRussell King }
361981b6714SRussell King
idmap_to_phys(unsigned long idmap)362981b6714SRussell King static inline phys_addr_t idmap_to_phys(unsigned long idmap)
363981b6714SRussell King {
364981b6714SRussell King phys_addr_t addr = idmap;
365981b6714SRussell King
366981b6714SRussell King if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset)
367981b6714SRussell King addr -= arch_phys_to_idmap_offset;
368981b6714SRussell King
369981b6714SRussell King return addr;
370981b6714SRussell King }
371981b6714SRussell King
__virt_to_idmap(unsigned long x)37228410293SRussell King static inline unsigned long __virt_to_idmap(unsigned long x)
3734dc9a817SSantosh Shilimkar {
374981b6714SRussell King return phys_to_idmap(__virt_to_phys(x));
3754dc9a817SSantosh Shilimkar }
3764dc9a817SSantosh Shilimkar
3774dc9a817SSantosh Shilimkar #define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))
3784dc9a817SSantosh Shilimkar
3794dc9a817SSantosh Shilimkar /*
3804baa9922SRussell King * Conversion between a struct page and a physical address.
3814baa9922SRussell King *
3824baa9922SRussell King * page_to_pfn(page) convert a struct page * to a PFN number
3834baa9922SRussell King * pfn_to_page(pfn) convert a _valid_ PFN number to struct page *
3844baa9922SRussell King *
3854baa9922SRussell King * virt_to_page(k) convert a _valid_ virtual address to struct page *
3864baa9922SRussell King * virt_addr_valid(k) indicates whether a virtual address is valid
3874baa9922SRussell King */
3884baa9922SRussell King #define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
3894baa9922SRussell King
390e26a9e00SRussell King #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
391efea3403SLaura Abbott #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
392e26a9e00SRussell King && pfn_valid(virt_to_pfn(kaddr)))
3934baa9922SRussell King
3944baa9922SRussell King #endif
3954baa9922SRussell King
3964baa9922SRussell King #endif
397