Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391/* SPDX-License-Identifier: GPL-2.0-only *//* * arch/arm/include/asm/memory.h * * Copyright (C) 2000-2002 Russell King * modification for nommu, Hyok S. Choi, 2004 * * Note: this file should not be included explicitly, include <asm/page.h> * to get access to these definitions. */#ifndef __ASM_ARM_MEMORY_H#define __ASM_ARM_MEMORY_H
#ifndef _ASMARM_PAGE_H#error "Do not include <asm/memory.h> directly"#endif
#include <linux/compiler.h>#include <linux/const.h>#include <linux/types.h>#include <linux/sizes.h>
#ifdef CONFIG_NEED_MACH_MEMORY_H#include <mach/memory.h>#endif#include <asm/kasan_def.h>
/* * PAGE_OFFSET: the virtual address of the start of lowmem, memory above * the virtual address range for userspace. * KERNEL_OFFSET: the virtual address of the start of the kernel image. * we may further offset this with TEXT_OFFSET in practice. */#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)#define KERNEL_OFFSET (PAGE_OFFSET)
#ifdef CONFIG_MMU
/* * TASK_SIZE - the maximum size of a user space task. * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area */#ifndef CONFIG_KASAN#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))#else#define TASK_SIZE (KASAN_SHADOW_START)#endif#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
/* * The maximum size of a 26-bit user space task. */#define TASK_SIZE_26 (UL(1) << 26)
/* * The module space lives between the addresses given by TASK_SIZE * and PAGE_OFFSET - it must be within 32MB of the kernel text. */#ifndef CONFIG_THUMB2_KERNEL#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)#else/* smaller range for Thumb-2 symbols relocation (2^24)*/#define MODULES_VADDR (PAGE_OFFSET - SZ_8M)#endif
#if TASK_SIZE > MODULES_VADDR#error Top of user space clashes with start of module space#endif
/* * The highmem pkmap virtual space shares the end of the module area. */#ifdef CONFIG_HIGHMEM#define MODULES_END (PAGE_OFFSET - PMD_SIZE)#else#define MODULES_END (PAGE_OFFSET)#endif
/* * The XIP kernel gets mapped at the bottom of the module vm area. * Since we use sections to map it, this macro replaces the physical address * with its virtual address while keeping offset from the base section. */#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
#define FDT_FIXED_BASE UL(0xff800000)#define FDT_FIXED_SIZE (2 * SECTION_SIZE)#define FDT_VIRT_BASE(physbase) ((void *)(FDT_FIXED_BASE | (physbase) % SECTION_SIZE))
#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)/* * Allow 2MB-aligned ioremap pages */#define IOREMAP_MAX_ORDER 21#endif
#define VECTORS_BASE UL(0xffff0000)
#else /* CONFIG_MMU */
#ifndef __ASSEMBLY__extern unsigned long setup_vectors_base(void);extern unsigned long vectors_base;#define VECTORS_BASE vectors_base#endif
/* * The limitation of user task size can grow up to the end of free ram region. * It is difficult to define and perhaps will never meet the original meaning * of this define that was meant to. * Fortunately, there is no reference for this in noMMU mode, for now. */#define TASK_SIZE UL(0xffffffff)
#ifndef TASK_UNMAPPED_BASE#define TASK_UNMAPPED_BASE UL(0x00000000)#endif
#ifndef END_MEM#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)#endif
/* * The module can be at any place in ram in nommu mode. */#define MODULES_END (END_MEM)#define MODULES_VADDR PAGE_OFFSET
#define XIP_VIRT_ADDR(physaddr) (physaddr)#define FDT_VIRT_BASE(physbase) ((void *)(physbase))
#endif /* !CONFIG_MMU */
#ifdef CONFIG_XIP_KERNEL#define KERNEL_START _sdata#else#define KERNEL_START _stext#endif#define KERNEL_END _end
/* * We fix the TCM memories max 32 KiB ITCM resp DTCM at these * locations */#ifdef CONFIG_HAVE_TCM#define ITCM_OFFSET UL(0xfffe0000)#define DTCM_OFFSET UL(0xfffe8000)#endif
/* * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical * memory. This is used for XIP and NoMMU kernels, and on platforms that don't * have CONFIG_ARM_PATCH_PHYS_VIRT. Assembly code must always use * PLAT_PHYS_OFFSET and not PHYS_OFFSET. */#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
#ifndef __ASSEMBLY__
/* * Physical start and end address of the kernel sections. These addresses are * 2MB-aligned to match the section mappings placed over the kernel. We use * u64 so that LPAE mappings beyond the 32bit limit will work out as well. */extern u64 kernel_sec_start;extern u64 kernel_sec_end;
/* * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. * * PFNs are used to describe any physical page; this means * PFN 0 == physical address 0. */
#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)
/* * Constants used to force the right instruction encodings and shifts * so that all we need to do is modify the 8-bit constant field. */#define __PV_BITS_31_24 0x81000000#define __PV_BITS_23_16 0x810000#define __PV_BITS_7_0 0x81
extern unsigned long __pv_phys_pfn_offset;extern u64 __pv_offset;extern void fixup_pv_table(const void *, unsigned long);extern const void *__pv_table_begin, *__pv_table_end;
#define PHYS_OFFSET ((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)#define PHYS_PFN_OFFSET (__pv_phys_pfn_offset)
#ifndef CONFIG_THUMB2_KERNEL#define __pv_stub(from,to,instr) \ __asm__("@ __pv_stub\n" \ "1: " instr " %0, %1, %2\n" \ "2: " instr " %0, %0, %3\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 1b - ., 2b - .\n" \ " .popsection\n" \ : "=r" (to) \ : "r" (from), "I" (__PV_BITS_31_24), \ "I"(__PV_BITS_23_16))
#define __pv_add_carry_stub(x, y) \ __asm__("@ __pv_add_carry_stub\n" \ "0: movw %R0, #0\n" \ " adds %Q0, %1, %R0, lsl #20\n" \ "1: mov %R0, %2\n" \ " adc %R0, %R0, #0\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 0b - ., 1b - .\n" \ " .popsection\n" \ : "=&r" (y) \ : "r" (x), "I" (__PV_BITS_7_0) \ : "cc")
#else#define __pv_stub(from,to,instr) \ __asm__("@ __pv_stub\n" \ "0: movw %0, #0\n" \ " lsl %0, #21\n" \ " " instr " %0, %1, %0\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 0b - .\n" \ " .popsection\n" \ : "=&r" (to) \ : "r" (from))
#define __pv_add_carry_stub(x, y) \ __asm__("@ __pv_add_carry_stub\n" \ "0: movw %R0, #0\n" \ " lsls %R0, #21\n" \ " adds %Q0, %1, %R0\n" \ "1: mvn %R0, #0\n" \ " adc %R0, %R0, #0\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 0b - ., 1b - .\n" \ " .popsection\n" \ : "=&r" (y) \ : "r" (x) \ : "cc")#endif
static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x){ phys_addr_t t;
if (sizeof(phys_addr_t) == 4) { __pv_stub(x, t, "add"); } else { __pv_add_carry_stub(x, t); } return t;}
static inline unsigned long __phys_to_virt(phys_addr_t x){ unsigned long t;
/* * 'unsigned long' cast discard upper word when * phys_addr_t is 64 bit, and makes sure that inline * assembler expression receives 32 bit argument * in place where 'r' 32 bit operand is expected. */ __pv_stub((unsigned long) x, t, "sub"); return t;}
#else
#define PHYS_OFFSET PLAT_PHYS_OFFSET#define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x){ return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;}
static inline unsigned long __phys_to_virt(phys_addr_t x){ return x - PHYS_OFFSET + PAGE_OFFSET;}
#endif
static inline unsigned long virt_to_pfn(const void *p){ unsigned long kaddr = (unsigned long)p; return (((kaddr - PAGE_OFFSET) >> PAGE_SHIFT) + PHYS_PFN_OFFSET);}#define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x))
#ifdef CONFIG_DEBUG_VIRTUALextern phys_addr_t __virt_to_phys(unsigned long x);extern phys_addr_t __phys_addr_symbol(unsigned long x);#else#define __virt_to_phys(x) __virt_to_phys_nodebug(x)#define __phys_addr_symbol(x) __pa_symbol_nodebug(x)#endif
/* * These are *only* valid on the kernel direct mapped RAM memory. * Note: Drivers should NOT use these. They are the wrong * translation for translating DMA addresses. Use the driver * DMA support - see dma-mapping.h. */#define virt_to_phys virt_to_physstatic inline phys_addr_t virt_to_phys(const volatile void *x){ return __virt_to_phys((unsigned long)(x));}
#define phys_to_virt phys_to_virtstatic inline void *phys_to_virt(phys_addr_t x){ return (void *)__phys_to_virt(x);}
/* * Drivers should NOT use these either. */#define __pa(x) __virt_to_phys((unsigned long)(x))#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))#define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT)
extern long long arch_phys_to_idmap_offset;
/* * These are for systems that have a hardware interconnect supported alias * of physical memory for idmap purposes. Most cases should leave these * untouched. Note: this can only return addresses less than 4GiB. */static inline bool arm_has_idmap_alias(void){ return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;}
#define IDMAP_INVALID_ADDR ((u32)~0)
static inline unsigned long phys_to_idmap(phys_addr_t addr){ if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) { addr += arch_phys_to_idmap_offset; if (addr > (u32)~0) addr = IDMAP_INVALID_ADDR; } return addr;}
static inline phys_addr_t idmap_to_phys(unsigned long idmap){ phys_addr_t addr = idmap;
if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) addr -= arch_phys_to_idmap_offset;
return addr;}
static inline unsigned long __virt_to_idmap(unsigned long x){ return phys_to_idmap(__virt_to_phys(x));}
#define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))
/* * Conversion between a struct page and a physical address. * * page_to_pfn(page) convert a struct page * to a PFN number * pfn_to_page(pfn) convert a _valid_ PFN number to struct page * * * virt_to_page(k) convert a _valid_ virtual address to struct page * * virt_addr_valid(k) indicates whether a virtual address is valid */#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \ && pfn_valid(virt_to_pfn(kaddr)))
#endif
#endif