| /* 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 0x80000000 |
| #define SSEG_SIZE 0x20000000 |
| #define LOWMEM_LIMIT (SSEG_SIZE * 2) |
| |
| #define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (SSEG_SIZE - 1)) |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/pfn.h> |
| |
| #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
| #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
| |
| #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \ |
| (void *)(kaddr) < high_memory) |
| #define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr) |
| |
| 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)) |
| |
| #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 VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #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 */ |