/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_CSKY_PAGE_H #define __ASM_CSKY_PAGE_H #include <asm/setup.h> #include <asm/cache.h> #include <linux/const.h> /* * PAGE_SHIFT determines the page size: 4KB */ #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE - 1)) #define THREAD_SIZE (PAGE_SIZE * 2) #define THREAD_MASK (~(THREAD_SIZE - 1)) #define THREAD_SHIFT (PAGE_SHIFT + 1) /* * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical * address region. We use them mapping kernel 1GB direct-map address area and * for more than 1GB of memory we use highmem. */ #define PAGE_OFFSET CONFIG_PAGE_OFFSET #define SSEG_SIZE 0x20000000 #define LOWMEM_LIMIT (SSEG_SIZE * 2) #define PHYS_OFFSET_OFFSET (CONFIG_DRAM_BASE & (SSEG_SIZE - 1)) #ifndef __ASSEMBLY__ #include <linux/pfn.h> #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \ (void *)(kaddr) < high_memory) extern void *memset(void *dest, int c, size_t l); extern void *memcpy(void *to, const void *from, size_t l); #define clear_page(page) memset((page), 0, PAGE_SIZE) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) #define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr))) struct page; #include <abi/page.h> struct vm_area_struct; typedef struct { unsigned long pte_low; } pte_t; #define pte_val(x) ((x).pte_low) typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct page *pgtable_t; #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) #define __pte(x) ((pte_t) { (x) }) #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) extern unsigned long va_pa_offset; #define ARCH_PFN_OFFSET PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET) #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset) #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset)) #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) static inline unsigned long virt_to_pfn(const void *kaddr) { return __pa(kaddr) >> PAGE_SHIFT; } static inline void * pfn_to_virt(unsigned long pfn) { return (void *)((unsigned long)__va(pfn) << PAGE_SHIFT); } #define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \ PHYS_OFFSET_OFFSET) #define virt_to_page(x) (mem_map + MAP_NR(x)) #define pfn_to_kaddr(x) __va(PFN_PHYS(x)) #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> #endif /* !__ASSEMBLY__ */ #endif /* __ASM_CSKY_PAGE_H */