diff options
Diffstat (limited to 'arch/riscv/include/asm/page.h')
| -rw-r--r-- | arch/riscv/include/asm/page.h | 91 |
1 files changed, 69 insertions, 22 deletions
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 2d50f76efe48..1526e410e802 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -31,22 +31,24 @@ * When not using MMU this corresponds to the first free page in * physical memory (aligned on a page boundary). */ +#ifdef CONFIG_64BIT +#ifdef CONFIG_MMU +#define PAGE_OFFSET kernel_map.page_offset +#else #define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) - -#define KERN_VIRT_SIZE (-PAGE_OFFSET) +#endif +/* + * By default, CONFIG_PAGE_OFFSET value corresponds to SV48 address space so + * define the PAGE_OFFSET value for SV39. + */ +#define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL) +#define PAGE_OFFSET_L3 _AC(0xffffffd800000000, UL) +#else +#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) +#endif /* CONFIG_64BIT */ #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) - #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) @@ -89,19 +91,59 @@ typedef struct page *pgtable_t; #endif #ifdef CONFIG_MMU -extern unsigned long va_pa_offset; -extern unsigned long pfn_base; -#define ARCH_PFN_OFFSET (pfn_base) +extern unsigned long riscv_pfn_base; +#define ARCH_PFN_OFFSET (riscv_pfn_base) #else -#define va_pa_offset 0 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ -extern unsigned long max_low_pfn; -extern unsigned long min_low_pfn; - -#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset)) -#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset) +struct kernel_mapping { + unsigned long page_offset; + unsigned long virt_addr; + 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 */ + unsigned long va_kernel_pa_offset; + unsigned long va_kernel_xip_pa_offset; +#ifdef CONFIG_XIP_KERNEL + uintptr_t xiprom; + uintptr_t xiprom_sz; +#endif +}; + +extern struct kernel_mapping kernel_map; +extern phys_addr_t phys_ram_base; + +#define is_kernel_mapping(x) \ + ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) + +#define is_linear_mapping(x) \ + ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < PAGE_OFFSET + KERN_VIRT_SIZE)) + +#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)) +#define kernel_mapping_pa_to_va(y) ({ \ + unsigned long _y = y; \ + (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \ + (void *)((unsigned long)(_y) + kernel_map.va_kernel_xip_pa_offset) : \ + (void *)((unsigned long)(_y) + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \ + }) +#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x) + +#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset) +#define kernel_mapping_va_to_pa(y) ({ \ + unsigned long _y = y; \ + (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \ + ((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \ + ((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \ + }) + +#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); @@ -128,6 +170,8 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x); #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)) @@ -135,7 +179,10 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x); #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_DATA_FLAGS_NON_EXEC |