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/* 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
*/
#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)
/*
* NOTE: virtual isn't really correct, actually it should be the offset into the
* memory node, but we have no highmem, so that works for now.
* TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
* of the shifts unnecessary.
*/
#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;
/*
* These are used to make use of C type-checking..
*/
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) })
#endif /* !__ASSEMBLY__ */
#define PHYS_OFFSET (CONFIG_RAM_BASE & ~(LOWMEM_LIMIT - 1))
#define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (LOWMEM_LIMIT - 1))
#define ARCH_PFN_OFFSET PFN_DOWN(CONFIG_RAM_BASE)
#define PAGE_OFFSET 0x80000000
#define LOWMEM_LIMIT 0x40000000
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - \
PHYS_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)
/*
* main RAM and kernel working space are coincident at 0x80000000, but to make
* life more interesting, there's also an uncached virtual shadow at 0xb0000000
* - these mappings are fixed in the MMU
*/
#define pfn_to_kaddr(x) __va(PFN_PHYS(x))
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* __ASM_CSKY_PAGE_H */
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