1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun #ifndef __ASM_CSKY_PAGE_H 4*4882a593Smuzhiyun #define __ASM_CSKY_PAGE_H 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #include <asm/setup.h> 7*4882a593Smuzhiyun #include <asm/cache.h> 8*4882a593Smuzhiyun #include <linux/const.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* 11*4882a593Smuzhiyun * PAGE_SHIFT determines the page size: 4KB 12*4882a593Smuzhiyun */ 13*4882a593Smuzhiyun #define PAGE_SHIFT 12 14*4882a593Smuzhiyun #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 15*4882a593Smuzhiyun #define PAGE_MASK (~(PAGE_SIZE - 1)) 16*4882a593Smuzhiyun #define THREAD_SIZE (PAGE_SIZE * 2) 17*4882a593Smuzhiyun #define THREAD_MASK (~(THREAD_SIZE - 1)) 18*4882a593Smuzhiyun #define THREAD_SHIFT (PAGE_SHIFT + 1) 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* 22*4882a593Smuzhiyun * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there 23*4882a593Smuzhiyun * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical 24*4882a593Smuzhiyun * address region. We use them mapping kernel 1GB direct-map address area and 25*4882a593Smuzhiyun * for more than 1GB of memory we use highmem. 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun #define PAGE_OFFSET 0x80000000 28*4882a593Smuzhiyun #define SSEG_SIZE 0x20000000 29*4882a593Smuzhiyun #define LOWMEM_LIMIT (SSEG_SIZE * 2) 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #define PHYS_OFFSET_OFFSET (CONFIG_DRAM_BASE & (SSEG_SIZE - 1)) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #include <linux/pfn.h> 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 38*4882a593Smuzhiyun #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \ 41*4882a593Smuzhiyun (void *)(kaddr) < high_memory) 42*4882a593Smuzhiyun #define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr) 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun extern void *memset(void *dest, int c, size_t l); 45*4882a593Smuzhiyun extern void *memcpy(void *to, const void *from, size_t l); 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #define clear_page(page) memset((page), 0, PAGE_SIZE) 48*4882a593Smuzhiyun #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 51*4882a593Smuzhiyun #define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr))) 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun struct page; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #include <abi/page.h> 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun struct vm_area_struct; 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun typedef struct { unsigned long pte_low; } pte_t; 60*4882a593Smuzhiyun #define pte_val(x) ((x).pte_low) 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun typedef struct { unsigned long pgd; } pgd_t; 63*4882a593Smuzhiyun typedef struct { unsigned long pgprot; } pgprot_t; 64*4882a593Smuzhiyun typedef struct page *pgtable_t; 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun #define pgd_val(x) ((x).pgd) 67*4882a593Smuzhiyun #define pgprot_val(x) ((x).pgprot) 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun #define __pte(x) ((pte_t) { (x) }) 72*4882a593Smuzhiyun #define __pgd(x) ((pgd_t) { (x) }) 73*4882a593Smuzhiyun #define __pgprot(x) ((pgprot_t) { (x) }) 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun extern unsigned long va_pa_offset; 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun #define ARCH_PFN_OFFSET PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET) 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset) 80*4882a593Smuzhiyun #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset)) 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \ 85*4882a593Smuzhiyun PHYS_OFFSET_OFFSET) 86*4882a593Smuzhiyun #define virt_to_page(x) (mem_map + MAP_NR(x)) 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun #define pfn_to_kaddr(x) __va(PFN_PHYS(x)) 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun #include <asm-generic/memory_model.h> 91*4882a593Smuzhiyun #include <asm-generic/getorder.h> 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #endif /* !__ASSEMBLY__ */ 94*4882a593Smuzhiyun #endif /* __ASM_CSKY_PAGE_H */ 95