/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_CSKY_PAGE_H
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#define __ASM_CSKY_PAGE_H
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#include <asm/setup.h>
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#include <asm/cache.h>
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#include <linux/const.h>
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/*
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* PAGE_SHIFT determines the page size: 4KB
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*/
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE - 1))
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#define THREAD_SIZE (PAGE_SIZE * 2)
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#define THREAD_MASK (~(THREAD_SIZE - 1))
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#define THREAD_SHIFT (PAGE_SHIFT + 1)
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/*
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* For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there
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* are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical
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* address region. We use them mapping kernel 1GB direct-map address area and
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* for more than 1GB of memory we use highmem.
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*/
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#define PAGE_OFFSET 0x80000000
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#define SSEG_SIZE 0x20000000
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#define LOWMEM_LIMIT (SSEG_SIZE * 2)
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#define PHYS_OFFSET_OFFSET (CONFIG_DRAM_BASE & (SSEG_SIZE - 1))
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#ifndef __ASSEMBLY__
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#include <linux/pfn.h>
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#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
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#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
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#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
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(void *)(kaddr) < high_memory)
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#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
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extern void *memset(void *dest, int c, size_t l);
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extern void *memcpy(void *to, const void *from, size_t l);
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#define clear_page(page) memset((page), 0, PAGE_SIZE)
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#define phys_to_page(paddr) (pfn_to_page(PFN_DOWN(paddr)))
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struct page;
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#include <abi/page.h>
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struct vm_area_struct;
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typedef struct { unsigned long pte_low; } pte_t;
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#define pte_val(x) ((x).pte_low)
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct page *pgtable_t;
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
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#define __pte(x) ((pte_t) { (x) })
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#define __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_t) { (x) })
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extern unsigned long va_pa_offset;
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#define ARCH_PFN_OFFSET PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET)
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset)
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#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset))
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#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
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#define MAP_NR(x) PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \
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PHYS_OFFSET_OFFSET)
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#define virt_to_page(x) (mem_map + MAP_NR(x))
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#define pfn_to_kaddr(x) __va(PFN_PHYS(x))
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_CSKY_PAGE_H */
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