diff options
Diffstat (limited to 'arch/riscv/include/asm/page.h')
| -rw-r--r-- | arch/riscv/include/asm/page.h | 166 |
1 files changed, 123 insertions, 43 deletions
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index ac699246ae7e..572a141ddecd 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -12,15 +12,8 @@ #include <linux/pfn.h> #include <linux/const.h> -#define PAGE_SHIFT (12) -#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) -#define PAGE_MASK (~(PAGE_SIZE - 1)) +#include <vdso/page.h> -#ifdef CONFIG_64BIT -#define HUGE_MAX_HSTATE 2 -#else -#define HUGE_MAX_HSTATE 1 -#endif #define HPAGE_SHIFT PMD_SHIFT #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) @@ -31,26 +24,33 @@ * When not using MMU this corresponds to the first free page in * physical memory (aligned on a page boundary). */ -#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) - -#define KERN_VIRT_SIZE (-PAGE_OFFSET) +#ifdef CONFIG_MMU +#ifdef CONFIG_64BIT +#define PAGE_OFFSET_L5 _AC(0xff60000000000000, UL) +#define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL) +#define PAGE_OFFSET_L3 _AC(0xffffffd600000000, UL) +#ifdef CONFIG_XIP_KERNEL +#define PAGE_OFFSET PAGE_OFFSET_L3 +#else +#define PAGE_OFFSET kernel_map.page_offset +#endif /* CONFIG_XIP_KERNEL */ +#else +#define PAGE_OFFSET _AC(0xc0000000, UL) +#endif /* CONFIG_64BIT */ +#else +#define PAGE_OFFSET ((unsigned long)phys_ram_base) +#endif /* CONFIG_MMU */ #ifndef __ASSEMBLY__ -#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) -#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) - -/* align addr on a size boundary - adjust address up/down if needed */ -#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1))) -#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1))) - -/* align addr on a size boundary - adjust address up if needed */ -#define _ALIGN(addr, size) _ALIGN_UP(addr, size) - +#ifdef CONFIG_RISCV_ISA_ZICBOZ +void clear_page(void *page); +#else #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) +#endif #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) -#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) +#define clear_user_page(pgaddr, vaddr, page) clear_page(pgaddr) #define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) @@ -88,20 +88,98 @@ typedef struct page *pgtable_t; #define PTE_FMT "%08lx" #endif -#ifdef CONFIG_MMU -extern unsigned long va_pa_offset; -extern unsigned long pfn_base; -#define ARCH_PFN_OFFSET (pfn_base) +#if defined(CONFIG_64BIT) && defined(CONFIG_MMU) +/* + * We override this value as its generic definition uses __pa too early in + * the boot process (before kernel_map.va_pa_offset is set). + */ +#define MIN_MEMBLOCK_ADDR 0 +#endif + +#define ARCH_PFN_OFFSET (PFN_DOWN((unsigned long)phys_ram_base)) + +struct kernel_mapping { + unsigned long virt_addr; + unsigned long virt_offset; + uintptr_t phys_addr; + uintptr_t size; + /* Offset between linear mapping virtual address and kernel load address */ + unsigned long va_pa_offset; + /* Offset between kernel mapping virtual address and kernel load address */ +#ifdef CONFIG_XIP_KERNEL + unsigned long va_kernel_xip_text_pa_offset; + unsigned long va_kernel_xip_data_pa_offset; + uintptr_t xiprom; + uintptr_t xiprom_sz; #else -#define va_pa_offset 0 -#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) -#endif /* CONFIG_MMU */ + unsigned long page_offset; + unsigned long va_kernel_pa_offset; +#endif +}; + +extern struct kernel_mapping kernel_map; +extern phys_addr_t phys_ram_base; +extern unsigned long vmemmap_start_pfn; + +#define is_kernel_mapping(x) \ + ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) -extern unsigned long max_low_pfn; -extern unsigned long min_low_pfn; +#define is_linear_mapping(x) \ + ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < PAGE_OFFSET + KERN_VIRT_SIZE)) -#define __pa(x) ((unsigned long)(x) - va_pa_offset) -#define __va(x) ((void *)((unsigned long) (x) + va_pa_offset)) +#ifndef CONFIG_DEBUG_VIRTUAL +#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)) +#else +void *linear_mapping_pa_to_va(unsigned long x); +#endif + +#ifdef CONFIG_XIP_KERNEL +#define kernel_mapping_pa_to_va(y) ({ \ + unsigned long _y = (unsigned long)(y); \ + (_y < phys_ram_base) ? \ + (void *)(_y + kernel_map.va_kernel_xip_text_pa_offset) : \ + (void *)(_y + kernel_map.va_kernel_xip_data_pa_offset); \ + }) +#else +#define kernel_mapping_pa_to_va(y) ((void *)((unsigned long)(y) + kernel_map.va_kernel_pa_offset)) +#endif + +#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x) + +#ifndef CONFIG_DEBUG_VIRTUAL +#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset) +#else +phys_addr_t linear_mapping_va_to_pa(unsigned long x); +#endif + +#ifdef CONFIG_XIP_KERNEL +#define kernel_mapping_va_to_pa(y) ({ \ + unsigned long _y = (unsigned long)(y); \ + (_y < kernel_map.virt_addr + kernel_map.xiprom_sz) ? \ + (_y - kernel_map.va_kernel_xip_text_pa_offset) : \ + (_y - kernel_map.va_kernel_xip_data_pa_offset); \ + }) +#else +#define kernel_mapping_va_to_pa(y) ((unsigned long)(y) - kernel_map.va_kernel_pa_offset) +#endif + +#define __va_to_pa_nodebug(x) ({ \ + unsigned long _x = x; \ + is_linear_mapping(_x) ? \ + linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_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) __va_to_pa_nodebug(x) +#define __phys_addr_symbol(x) __va_to_pa_nodebug(x) +#endif /* CONFIG_DEBUG_VIRTUAL */ + +#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0)) +#define __pa(x) __virt_to_phys((unsigned long)(x)) +#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x))) #define phys_to_pfn(phys) (PFN_DOWN(phys)) #define pfn_to_phys(pfn) (PFN_PHYS(pfn)) @@ -112,21 +190,23 @@ extern unsigned long min_low_pfn; #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) #define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) -#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) -#define page_to_bus(page) (page_to_phys(page)) -#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) +#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) -#ifdef CONFIG_FLATMEM -#define pfn_valid(pfn) \ - (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)) -#endif +unsigned long kaslr_offset(void); + +static __always_inline void *pfn_to_kaddr(unsigned long pfn) +{ + return __va(pfn << PAGE_SHIFT); +} #endif /* __ASSEMBLY__ */ -#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) +#define virt_addr_valid(vaddr) ({ \ + unsigned long _addr = (unsigned long)vaddr; \ + (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \ +}) -#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> |