1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __ASM_CSKY_PAGE_H 4 #define __ASM_CSKY_PAGE_H 5 6 #include <asm/setup.h> 7 #include <asm/cache.h> 8 #include <linux/const.h> 9 10 #include <vdso/page.h> 11 12 #define THREAD_SIZE (PAGE_SIZE * 2) 13 #define THREAD_MASK (~(THREAD_SIZE - 1)) 14 #define THREAD_SHIFT (PAGE_SHIFT + 1) 15 16 17 /* 18 * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there 19 * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical 20 * address region. We use them mapping kernel 1GB direct-map address area and 21 * for more than 1GB of memory we use highmem. 22 */ 23 #define PAGE_OFFSET CONFIG_PAGE_OFFSET 24 #define SSEG_SIZE 0x20000000 25 #define LOWMEM_LIMIT (SSEG_SIZE * 2) 26 27 #define PHYS_OFFSET_OFFSET (CONFIG_DRAM_BASE & (SSEG_SIZE - 1)) 28 29 #ifndef __ASSEMBLY__ 30 31 #include <linux/pfn.h> 32 33 #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \ 34 (void *)(kaddr) < high_memory) 35 36 extern void *memset(void *dest, int c, size_t l); 37 extern void *memcpy(void *to, const void *from, size_t l); 38 39 #define clear_page(page) memset((page), 0, PAGE_SIZE) 40 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 41 42 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 43 #define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr))) 44 45 struct page; 46 47 #include <abi/page.h> 48 49 struct vm_area_struct; 50 51 typedef struct { unsigned long pte_low; } pte_t; 52 #define pte_val(x) ((x).pte_low) 53 54 typedef struct { unsigned long pgd; } pgd_t; 55 typedef struct { unsigned long pgprot; } pgprot_t; 56 typedef struct page *pgtable_t; 57 58 #define pgd_val(x) ((x).pgd) 59 #define pgprot_val(x) ((x).pgprot) 60 61 #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) 62 63 #define __pte(x) ((pte_t) { (x) }) 64 #define __pgd(x) ((pgd_t) { (x) }) 65 #define __pgprot(x) ((pgprot_t) { (x) }) 66 67 extern unsigned long va_pa_offset; 68 69 #define ARCH_PFN_OFFSET PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET) 70 71 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset) 72 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset)) 73 74 #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) 75 76 static inline unsigned long virt_to_pfn(const void *kaddr) 77 { 78 return __pa(kaddr) >> PAGE_SHIFT; 79 } 80 81 #define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \ 82 PHYS_OFFSET_OFFSET) 83 #define virt_to_page(x) (mem_map + MAP_NR(x)) 84 85 #define pfn_to_kaddr(x) __va(PFN_PHYS(x)) 86 87 #include <asm-generic/memory_model.h> 88 #include <asm-generic/getorder.h> 89 90 #endif /* !__ASSEMBLY__ */ 91 #endif /* __ASM_CSKY_PAGE_H */ 92