/* * arch/arm/include/asm/memory.h * * Copyright (C) 2000-2002 Russell King * modification for nommu, Hyok S. Choi, 2004 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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 /* * Allow for constants defined here to be used from assembly code * by prepending the UL suffix only with actual C code compilation. */ #define UL(x) _AC(x, UL) /* PAGE_OFFSET - the virtual address of the start of the kernel image */ #define PAGE_OFFSET UL(CONFIG_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 */ #define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M)) #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)) #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 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) #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) #ifdef CONFIG_XIP_KERNEL /* * When referencing data in RAM from the XIP region in a relative manner * with the MMU off, we need the relative offset between the two physical * addresses. The macro below achieves this, which is: * __pa(v_data) - __xip_pa(v_text) */ #define PHYS_RELATIVE(v_data, v_text) \ (((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \ ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \ CONFIG_XIP_PHYS_ADDR)) #else #define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text)) #endif #ifndef __ASSEMBLY__ /* * 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_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) #define __pv_stub(from,to,instr,type) \ __asm__("@ __pv_stub\n" \ "1: " instr " %0, %1, %2\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 1b\n" \ " .popsection\n" \ : "=r" (to) \ : "r" (from), "I" (type)) #define __pv_stub_mov_hi(t) \ __asm__ volatile("@ __pv_stub_mov\n" \ "1: mov %R0, %1\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 1b\n" \ " .popsection\n" \ : "=r" (t) \ : "I" (__PV_BITS_7_0)) #define __pv_add_carry_stub(x, y) \ __asm__ volatile("@ __pv_add_carry_stub\n" \ "1: adds %Q0, %1, %2\n" \ " adc %R0, %R0, #0\n" \ " .pushsection .pv_table,\"a\"\n" \ " .long 1b\n" \ " .popsection\n" \ : "+r" (y) \ : "r" (x), "I" (__PV_BITS_31_24) \ : "cc") 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", __PV_BITS_31_24); } else { __pv_stub_mov_hi(t); __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", __PV_BITS_31_24); 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
Name | Type | Size | Permission | Actions |
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hardware | Folder | 0755 |
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mach | Folder | 0755 |
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xen | Folder | 0755 |
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Kbuild | File | 568 B | 0644 |
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arch_gicv3.h | File | 9.05 KB | 0644 |
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arch_timer.h | File | 2.48 KB | 0644 |
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arm-cci.h | File | 1.05 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 10.46 KB | 0644 |
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atomic.h | File | 13.22 KB | 0644 |
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auxvec.h | File | 29 B | 0644 |
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bL_switcher.h | File | 2.28 KB | 0644 |
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barrier.h | File | 2.84 KB | 0644 |
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bitops.h | File | 8.62 KB | 0644 |
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bitrev.h | File | 451 B | 0644 |
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bug.h | File | 2.46 KB | 0644 |
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bugs.h | File | 546 B | 0644 |
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cache.h | File | 813 B | 0644 |
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cacheflush.h | File | 15.54 KB | 0644 |
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cachetype.h | File | 2.71 KB | 0644 |
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checksum.h | File | 3.71 KB | 0644 |
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clocksource.h | File | 153 B | 0644 |
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cmpxchg.h | File | 6.14 KB | 0644 |
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compiler.h | File | 978 B | 0644 |
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cp15.h | File | 3.84 KB | 0644 |
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cpu.h | File | 533 B | 0644 |
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cpufeature.h | File | 1.4 KB | 0644 |
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cpuidle.h | File | 1.33 KB | 0644 |
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cputype.h | File | 8.42 KB | 0644 |
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cti.h | File | 3.62 KB | 0644 |
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dcc.h | File | 1.01 KB | 0644 |
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delay.h | File | 2.83 KB | 0644 |
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device.h | File | 771 B | 0644 |
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div64.h | File | 3.17 KB | 0644 |
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dma-contiguous.h | File | 265 B | 0644 |
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dma-iommu.h | File | 1.01 KB | 0644 |
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dma-mapping.h | File | 7.44 KB | 0644 |
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dma.h | File | 4.18 KB | 0644 |
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dmi.h | File | 528 B | 0644 |
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domain.h | File | 3.65 KB | 0644 |
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ecard.h | File | 5.98 KB | 0644 |
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edac.h | File | 1.51 KB | 0644 |
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efi.h | File | 3.04 KB | 0644 |
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elf.h | File | 4.52 KB | 0644 |
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entry-macro-multi.S | File | 726 B | 0644 |
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exception.h | File | 571 B | 0644 |
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fb.h | File | 375 B | 0644 |
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fiq.h | File | 1.36 KB | 0644 |
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firmware.h | File | 1.82 KB | 0644 |
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fixmap.h | File | 1.84 KB | 0644 |
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flat.h | File | 915 B | 0644 |
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floppy.h | File | 3.61 KB | 0644 |
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fncpy.h | File | 3.08 KB | 0644 |
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fpstate.h | File | 1.73 KB | 0644 |
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ftrace.h | File | 1.92 KB | 0644 |
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futex.h | File | 4.24 KB | 0644 |
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glue-cache.h | File | 3.51 KB | 0644 |
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glue-df.h | File | 2.2 KB | 0644 |
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glue-pf.h | File | 1.12 KB | 0644 |
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glue-proc.h | File | 4.46 KB | 0644 |
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glue.h | File | 759 B | 0644 |
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gpio.h | File | 693 B | 0644 |
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hardirq.h | File | 803 B | 0644 |
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highmem.h | File | 2.15 KB | 0644 |
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hugetlb-3level.h | File | 2.03 KB | 0644 |
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hugetlb.h | File | 1.78 KB | 0644 |
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hw_breakpoint.h | File | 3.53 KB | 0644 |
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hw_irq.h | File | 349 B | 0644 |
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hwcap.h | File | 378 B | 0644 |
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hypervisor.h | File | 140 B | 0644 |
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ide.h | File | 566 B | 0644 |
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idmap.h | File | 355 B | 0644 |
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insn.h | File | 636 B | 0644 |
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io.h | File | 15.96 KB | 0644 |
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irq.h | File | 1015 B | 0644 |
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irq_work.h | File | 234 B | 0644 |
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irqflags.h | File | 3.88 KB | 0644 |
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jump_label.h | File | 1009 B | 0644 |
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kexec-internal.h | File | 272 B | 0644 |
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kexec.h | File | 2.3 KB | 0644 |
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kgdb.h | File | 2.72 KB | 0644 |
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kmap_types.h | File | 190 B | 0644 |
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kprobes.h | File | 2.65 KB | 0644 |
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kvm_arm.h | File | 7.6 KB | 0644 |
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kvm_asm.h | File | 2.84 KB | 0644 |
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kvm_coproc.h | File | 1.99 KB | 0644 |
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kvm_emulate.h | File | 7.84 KB | 0644 |
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kvm_host.h | File | 10.31 KB | 0644 |
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kvm_hyp.h | File | 4.49 KB | 0644 |
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kvm_mmio.h | File | 1.34 KB | 0644 |
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kvm_mmu.h | File | 7.27 KB | 0644 |
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limits.h | File | 166 B | 0644 |
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linkage.h | File | 216 B | 0644 |
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mc146818rtc.h | File | 720 B | 0644 |
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mcpm.h | File | 11.92 KB | 0644 |
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mcs_spinlock.h | File | 570 B | 0644 |
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memblock.h | File | 248 B | 0644 |
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memory.h | File | 10.12 KB | 0644 |
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mmu.h | File | 953 B | 0644 |
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mmu_context.h | File | 3.94 KB | 0644 |
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module.h | File | 1.57 KB | 0644 |
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mpu.h | File | 2.15 KB | 0644 |
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mtd-xip.h | File | 666 B | 0644 |
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neon.h | File | 1.16 KB | 0644 |
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nwflash.h | File | 252 B | 0644 |
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opcodes-sec.h | File | 742 B | 0644 |
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opcodes-virt.h | File | 1.32 KB | 0644 |
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opcodes.h | File | 8.07 KB | 0644 |
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outercache.h | File | 3.78 KB | 0644 |
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page-nommu.h | File | 957 B | 0644 |
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page.h | File | 3.61 KB | 0644 |
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paravirt.h | File | 454 B | 0644 |
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patch.h | File | 438 B | 0644 |
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pci.h | File | 956 B | 0644 |
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percpu.h | File | 1.56 KB | 0644 |
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perf_event.h | File | 850 B | 0644 |
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pgalloc.h | File | 3.79 KB | 0644 |
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pgtable-2level-hwdef.h | File | 3.45 KB | 0644 |
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pgtable-2level-types.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 8.51 KB | 0644 |
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pgtable-3level-hwdef.h | File | 3.95 KB | 0644 |
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pgtable-3level-types.h | File | 1.89 KB | 0644 |
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pgtable-3level.h | File | 9.54 KB | 0644 |
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pgtable-hwdef.h | File | 467 B | 0644 |
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pgtable-nommu.h | File | 2.66 KB | 0644 |
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pgtable.h | File | 11.68 KB | 0644 |
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probes.h | File | 1.73 KB | 0644 |
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proc-fns.h | File | 4.79 KB | 0644 |
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processor.h | File | 3.4 KB | 0644 |
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procinfo.h | File | 1.27 KB | 0644 |
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prom.h | File | 715 B | 0644 |
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psci.h | File | 771 B | 0644 |
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ptrace.h | File | 4.89 KB | 0644 |
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sections.h | File | 189 B | 0644 |
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set_memory.h | File | 1.04 KB | 0644 |
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setup.h | File | 934 B | 0644 |
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shmparam.h | File | 419 B | 0644 |
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signal.h | File | 500 B | 0644 |
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smp.h | File | 3.1 KB | 0644 |
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smp_plat.h | File | 2.48 KB | 0644 |
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smp_scu.h | File | 1.32 KB | 0644 |
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smp_twd.h | File | 908 B | 0644 |
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sparsemem.h | File | 716 B | 0644 |
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spectre.h | File | 906 B | 0644 |
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spinlock.h | File | 5.49 KB | 0644 |
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spinlock_types.h | File | 541 B | 0644 |
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stackprotector.h | File | 1.09 KB | 0644 |
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stacktrace.h | File | 742 B | 0644 |
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stage2_pgtable.h | File | 2.12 KB | 0644 |
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string.h | File | 1.43 KB | 0644 |
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suspend.h | File | 369 B | 0644 |
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swab.h | File | 1005 B | 0644 |
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switch_to.h | File | 1.03 KB | 0644 |
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sync_bitops.h | File | 1.03 KB | 0644 |
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syscall.h | File | 2.48 KB | 0644 |
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system_info.h | File | 763 B | 0644 |
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system_misc.h | File | 1.14 KB | 0644 |
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tcm.h | File | 937 B | 0644 |
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therm.h | File | 655 B | 0644 |
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thread_info.h | File | 5.2 KB | 0644 |
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thread_notify.h | File | 1.2 KB | 0644 |
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timex.h | File | 577 B | 0644 |
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tlb.h | File | 7.37 KB | 0644 |
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tlbflush.h | File | 17.88 KB | 0644 |
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tls.h | File | 3.09 KB | 0644 |
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topology.h | File | 1.18 KB | 0644 |
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traps.h | File | 1.17 KB | 0644 |
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trusted_foundations.h | File | 2.29 KB | 0644 |
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uaccess-asm.h | File | 2.83 KB | 0644 |
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uaccess.h | File | 16.22 KB | 0644 |
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ucontext.h | File | 2.98 KB | 0644 |
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unaligned.h | File | 846 B | 0644 |
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unified.h | File | 1.61 KB | 0644 |
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unistd.h | File | 1.68 KB | 0644 |
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unwind.h | File | 1.71 KB | 0644 |
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uprobes.h | File | 1.07 KB | 0644 |
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user.h | File | 4.2 KB | 0644 |
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v7m.h | File | 2.93 KB | 0644 |
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vdso.h | File | 507 B | 0644 |
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vdso_datapage.h | File | 1.69 KB | 0644 |
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vfp.h | File | 2.86 KB | 0644 |
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vfpmacros.h | File | 2.1 KB | 0644 |
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vga.h | File | 305 B | 0644 |
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virt.h | File | 2.9 KB | 0644 |
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word-at-a-time.h | File | 2.08 KB | 0644 |
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xor.h | File | 5.22 KB | 0644 |
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