From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arm/include/asm/memory.h | 375 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 375 insertions(+) create mode 100644 arch/arm/include/asm/memory.h (limited to 'arch/arm/include/asm/memory.h') diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h new file mode 100644 index 000000000..ed8fd0d19 --- /dev/null +++ b/arch/arm/include/asm/memory.h @@ -0,0 +1,375 @@ +/* + * 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 +#include +#include +#include + +#ifdef CONFIG_NEED_MACH_MEMORY_H +#include +#endif + +/* 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 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) + +#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 + +#endif -- cgit v1.2.3