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usr/src/linux-headers-5.15.0-133/arch/arm64/include/asm/memory.h��0000644��00000027076�15030373632�0017514 0��ustar�00��/* SPDX-License-Identifier: GPL-2.0-only / / * Based on arch/arm/include/asm/memory.h * * Copyright (C) 2000-2002 Russell King * Copyright (C) 2012 ARM Ltd. * * Note: this file should not be included by non-asm/.h files / #ifndef __ASM_MEMORY_H #define __ASM_MEMORY_H #include <linux/const.h> #include <linux/sizes.h> #include <asm/page-def.h> / * Size of the PCI I/O space. This must remain a power of two so that * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses. / #define PCI_IO_SIZE SZ_16M / * VMEMMAP_SIZE - allows the whole linear region to be covered by * a struct page array * * If we are configured with a 52-bit kernel VA then our VMEMMAP_SIZE * needs to cover the memory region from the beginning of the 52-bit * PAGE_OFFSET all the way to PAGE_END for 48-bit. This allows us to * keep a constant PAGE_OFFSET and "fallback" to using the higher end * of the VMEMMAP where 52-bit support is not available in hardware. / #define VMEMMAP_SHIFT (PAGE_SHIFT - STRUCT_PAGE_MAX_SHIFT) #define VMEMMAP_SIZE ((_PAGE_END(VA_BITS_MIN) - PAGE_OFFSET) >> VMEMMAP_SHIFT) / * PAGE_OFFSET - the virtual address of the start of the linear map, at the * start of the TTBR1 address space. * PAGE_END - the end of the linear map, where all other kernel mappings begin. * KIMAGE_VADDR - the virtual address of the start of the kernel image. * VA_BITS - the maximum number of bits for virtual addresses. / #define VA_BITS (CONFIG_ARM64_VA_BITS) #define _PAGE_OFFSET(va) (-(UL(1) << (va))) #define PAGE_OFFSET (_PAGE_OFFSET(VA_BITS)) #define KIMAGE_VADDR (MODULES_END) #define MODULES_END (MODULES_VADDR + MODULES_VSIZE) #define MODULES_VADDR (_PAGE_END(VA_BITS_MIN)) #define MODULES_VSIZE (SZ_128M) #define VMEMMAP_START (-(UL(1) << (VA_BITS - VMEMMAP_SHIFT))) #define VMEMMAP_END (VMEMMAP_START + VMEMMAP_SIZE) #define PCI_IO_END (VMEMMAP_START - SZ_8M) #define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) #define FIXADDR_TOP (VMEMMAP_START - SZ_32M) #if VA_BITS > 48 #define VA_BITS_MIN (48) #else #define VA_BITS_MIN (VA_BITS) #endif #define _PAGE_END(va) (-(UL(1) << ((va) - 1))) #define KERNEL_START _text #define KERNEL_END _end / * Generic and tag-based KASAN require 1/8th and 1/16th of the kernel virtual * address space for the shadow region respectively. They can bloat the stack * significantly, so double the (minimum) stack size when they are in use. / #if defined(CONFIG_KASAN_GENERIC) \|\| defined(CONFIG_KASAN_SW_TAGS) #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) #define KASAN_SHADOW_END ((UL(1) << (64 - KASAN_SHADOW_SCALE_SHIFT)) \ + KASAN_SHADOW_OFFSET) #define PAGE_END (KASAN_SHADOW_END - (1UL << (vabits_actual - KASAN_SHADOW_SCALE_SHIFT))) #define KASAN_THREAD_SHIFT 1 #else #define KASAN_THREAD_SHIFT 0 #define PAGE_END (_PAGE_END(VA_BITS_MIN)) #endif / CONFIG_KASAN / #define MIN_THREAD_SHIFT (14 + KASAN_THREAD_SHIFT) / * VMAP'd stacks are allocated at page granularity, so we must ensure that such * stacks are a multiple of page size. / #if defined(CONFIG_VMAP_STACK) && (MIN_THREAD_SHIFT < PAGE_SHIFT) #define THREAD_SHIFT PAGE_SHIFT #else #define THREAD_SHIFT MIN_THREAD_SHIFT #endif #if THREAD_SHIFT >= PAGE_SHIFT #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) #endif #define THREAD_SIZE (UL(1) << THREAD_SHIFT) / * By aligning VMAP'd stacks to 2 * THREAD_SIZE, we can detect overflow by * checking sp & (1 << THREAD_SHIFT), which we can do cheaply in the entry * assembly. / #ifdef CONFIG_VMAP_STACK #define THREAD_ALIGN (2 THREAD_SIZE) #else #define THREAD_ALIGN THREAD_SIZE #endif #define IRQ_STACK_SIZE THREAD_SIZE #define OVERFLOW_STACK_SIZE SZ_4K /* * Alignment of kernel segments (e.g. .text, .data). * * 4 KB granule: 16 level 3 entries, with contiguous bit * 16 KB granule: 4 level 3 entries, without contiguous bit * 64 KB granule: 1 level 3 entry / #define SEGMENT_ALIGN SZ_64K / * Memory types available. * * IMPORTANT: MT_NORMAL must be index 0 since vm_get_page_prot() may 'or' in * the MT_NORMAL_TAGGED memory type for PROT_MTE mappings. Note * that protection_map[] only contains MT_NORMAL attributes. / #define MT_NORMAL 0 #define MT_NORMAL_TAGGED 1 #define MT_NORMAL_NC 2 #define MT_DEVICE_nGnRnE 3 #define MT_DEVICE_nGnRE 4 / * Memory types for Stage-2 translation / #define MT_S2_NORMAL 0xf #define MT_S2_DEVICE_nGnRE 0x1 / * Memory types for Stage-2 translation when ID_AA64MMFR2_EL1.FWB is 0001 * Stage-2 enforces Normal-WB and Device-nGnRE / #define MT_S2_FWB_NORMAL 6 #define MT_S2_FWB_DEVICE_nGnRE 1 #ifdef CONFIG_ARM64_4K_PAGES #define IOREMAP_MAX_ORDER (PUD_SHIFT) #else #define IOREMAP_MAX_ORDER (PMD_SHIFT) #endif / * Open-coded (swapper_pg_dir - reserved_pg_dir) as this cannot be calculated * until link time. / #define RESERVED_SWAPPER_OFFSET (PAGE_SIZE) / * Open-coded (swapper_pg_dir - tramp_pg_dir) as this cannot be calculated * until link time. / #define TRAMP_SWAPPER_OFFSET (2 PAGE_SIZE) #ifndef __ASSEMBLY__ #include <linux/bitops.h> #include <linux/compiler.h> #include <linux/mmdebug.h> #include <linux/types.h> #include <asm/bug.h> extern u64 vabits_actual; extern s64 memstart_addr; /* PHYS_OFFSET - the physical address of the start of memory. / #define PHYS_OFFSET ({ VM_BUG_ON(memstart_addr & 1); memstart_addr; }) / the virtual base of the kernel image / extern u64 kimage_vaddr; / the offset between the kernel virtual and physical mappings / extern u64 kimage_voffset; static inline unsigned long kaslr_offset(void) { return kimage_vaddr - KIMAGE_VADDR; } / * Allow all memory at the discovery stage. We will clip it later. / #define MIN_MEMBLOCK_ADDR 0 #define MAX_MEMBLOCK_ADDR U64_MAX / * PFNs are used to describe any physical page; this means * PFN 0 == physical address 0. * * This is the PFN of the first RAM page in the kernel * direct-mapped view. We assume this is the first page * of RAM in the mem_map as well. / #define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) / * When dealing with data aborts, watchpoints, or instruction traps we may end * up with a tagged userland pointer. Clear the tag to get a sane pointer to * pass on to access_ok(), for instance. / #define __untagged_addr(addr) \ ((__force __typeof__(addr))sign_extend64((__force u64)(addr), 55)) #define untagged_addr(addr) ({ \ u64 __addr = (__force u64)(addr); \ __addr &= __untagged_addr(__addr); \ (__force __typeof__(addr))__addr; \ }) #if defined(CONFIG_KASAN_SW_TAGS) \|\| defined(CONFIG_KASAN_HW_TAGS) #define __tag_shifted(tag) ((u64)(tag) << 56) #define __tag_reset(addr) __untagged_addr(addr) #define __tag_get(addr) (__u8)((u64)(addr) >> 56) #else #define __tag_shifted(tag) 0UL #define __tag_reset(addr) (addr) #define __tag_get(addr) 0 #endif / CONFIG_KASAN_SW_TAGS \|\| CONFIG_KASAN_HW_TAGS / static inline const void __tag_set(const void addr, u8 tag) { u64 __addr = (u64)addr & ~__tag_shifted(0xff); return (const void )(__addr \| __tag_shifted(tag)); } #ifdef CONFIG_KASAN_HW_TAGS #define arch_enable_tagging_sync() mte_enable_kernel_sync() #define arch_enable_tagging_async() mte_enable_kernel_async() #define arch_force_async_tag_fault() mte_check_tfsr_exit() #define arch_get_random_tag() mte_get_random_tag() #define arch_get_mem_tag(addr) mte_get_mem_tag(addr) #define arch_set_mem_tag_range(addr, size, tag, init) \ mte_set_mem_tag_range((addr), (size), (tag), (init)) #endif /* CONFIG_KASAN_HW_TAGS / / * 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. / / * Check whether an arbitrary address is within the linear map, which * lives in the [PAGE_OFFSET, PAGE_END) interval at the bottom of the * kernel's TTBR1 address range. / #define __is_lm_address(addr) (((u64)(addr) - PAGE_OFFSET) < (PAGE_END - PAGE_OFFSET)) #define __lm_to_phys(addr) (((addr) - PAGE_OFFSET) + PHYS_OFFSET) #define __kimg_to_phys(addr) ((addr) - kimage_voffset) #define __virt_to_phys_nodebug(x) ({ \ phys_addr_t __x = (phys_addr_t)(__tag_reset(x)); \ __is_lm_address(__x) ? __lm_to_phys(__x) : __kimg_to_phys(__x); \ }) #define __pa_symbol_nodebug(x) __kimg_to_phys((phys_addr_t)(x)) #ifdef CONFIG_DEBUG_VIRTUAL extern 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 / CONFIG_DEBUG_VIRTUAL / #define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) \| PAGE_OFFSET) #define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset)) / * Convert a page to/from a physical address / #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) / * 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_phys static inline phys_addr_t virt_to_phys(const volatile void x) { return __virt_to_phys((unsigned long)(x)); } #define phys_to_virt phys_to_virt static 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 __pa_nodebug(x) __virt_to_phys_nodebug((unsigned long)(x)) #define __va(x) ((void )__phys_to_virt((phys_addr_t)(x))) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys((unsigned long)(x))) #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) /* * virt_to_page(x) convert a _valid_ virtual address to struct page * * virt_addr_valid(x) indicates whether a virtual address is valid / #define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET) #if defined(CONFIG_DEBUG_VIRTUAL) #define page_to_virt(x) ({ \ __typeof__(x) __page = x; \ void __addr = __va(page_to_phys(__page)); \ (void )__tag_set((const void )__addr, page_kasan_tag(__page));\ }) #define virt_to_page(x) pfn_to_page(virt_to_pfn(x)) #else #define page_to_virt(x) ({ \ __typeof__(x) __page = x; \ u64 __idx = ((u64)__page - VMEMMAP_START) / sizeof(struct page);\ u64 __addr = PAGE_OFFSET + (__idx * PAGE_SIZE); \ (void )__tag_set((const void )__addr, page_kasan_tag(__page));\ }) #define virt_to_page(x) ({ \ u64 __idx = (__tag_reset((u64)x) - PAGE_OFFSET) / PAGE_SIZE; \ u64 __addr = VMEMMAP_START + (__idx * sizeof(struct page)); \ (struct page )__addr; \ }) #endif / CONFIG_DEBUG_VIRTUAL / #define virt_addr_valid(addr) ({ \ __typeof__(addr) __addr = __tag_reset(addr); \ __is_lm_address(__addr) && pfn_is_map_memory(virt_to_pfn(__addr)); \ }) void dump_mem_limit(void); static inline bool defer_reserve_crashkernel(void) { return IS_ENABLED(CONFIG_ZONE_DMA) \|\| IS_ENABLED(CONFIG_ZONE_DMA32); } #endif / !ASSEMBLY / / * Given that the GIC architecture permits ITS implementations that can only be * configured with a LPI table address once, GICv3 systems with many CPUs may * end up reserving a lot of different regions after a kexec for their LPI * tables (one per CPU), as we are forced to reuse the same memory after kexec * (and thus reserve it persistently with EFI beforehand) / #if defined(CONFIG_EFI) && defined(CONFIG_ARM_GIC_V3_ITS) # define INIT_MEMBLOCK_RESERVED_REGIONS (INIT_MEMBLOCK_REGIONS + NR_CPUS + 1) #endif #include <asm-generic/memory_model.h> #endif / __ASM_MEMORY_H / ��usr/src/linux-headers-5.15.0-133/arch/arm/include/asm/memory.h��0000644��00000025301�15030514703�0017323 0��ustar�00��/ 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 by non-asm/.h files / #ifndef __ASM_ARM_MEMORY_H #define __ASM_ARM_MEMORY_H #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 16MB-aligned ioremap pages / #define IOREMAP_MAX_ORDER 24 #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 / * Convert a page to/from a physical address / #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) / * 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 #define virt_to_pfn(kaddr) \ ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \ PHYS_PFN_OFFSET) #define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x)) #ifdef CONFIG_DEBUG_VIRTUAL extern 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_phys static inline phys_addr_t virt_to_phys(const volatile void x) { return __virt_to_phys((unsigned long)(x)); } #define phys_to_virt phys_to_virt static 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)) / * Virtual <-> DMA view memory address translations * Again, these are only valid on the kernel direct mapped RAM * memory. Use of these is deprecated (and that doesn't mean * use the __ prefixed forms instead.) See dma-mapping.h. / #ifndef __virt_to_bus #define __virt_to_bus __virt_to_phys #define __bus_to_virt __phys_to_virt #define __pfn_to_bus(x) __pfn_to_phys(x) #define __bus_to_pfn(x) __phys_to_pfn(x) #endif / * 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 #include <asm-generic/memory_model.h> #endif ��usr/src/linux-headers-5.15.0-142/arch/arm/include/asm/memory.h��0000644��00000025301�15030522322�0017317 0��ustar�00��/ 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 by non-asm/.h files / #ifndef __ASM_ARM_MEMORY_H #define __ASM_ARM_MEMORY_H #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 16MB-aligned ioremap pages / #define IOREMAP_MAX_ORDER 24 #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 / * Convert a page to/from a physical address / #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) / * 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 #define virt_to_pfn(kaddr) \ ((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \ PHYS_PFN_OFFSET) #define __pa_symbol_nodebug(x) __virt_to_phys_nodebug((x)) #ifdef CONFIG_DEBUG_VIRTUAL extern 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_phys static inline phys_addr_t virt_to_phys(const volatile void x) { return __virt_to_phys((unsigned long)(x)); } #define phys_to_virt phys_to_virt static 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)) / * Virtual <-> DMA view memory address translations * Again, these are only valid on the kernel direct mapped RAM * memory. Use of these is deprecated (and that doesn't mean * use the __ prefixed forms instead.) See dma-mapping.h. / #ifndef __virt_to_bus #define __virt_to_bus __virt_to_phys #define __bus_to_virt __phys_to_virt #define __pfn_to_bus(x) __pfn_to_phys(x) #define __bus_to_pfn(x) __phys_to_pfn(x) #endif / * 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 #include <asm-generic/memory_model.h> #endif ��

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