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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
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/* 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
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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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* NOTE: virtual isn't really correct, actually it should be the offset into the
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* memory node, but we have no highmem, so that works for now.
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* TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
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* of the shifts unnecessary.
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*/
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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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/*
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* These are used to make use of C type-checking..
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*/
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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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#endif /* !__ASSEMBLY__ */
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#define PHYS_OFFSET (CONFIG_RAM_BASE & ~(LOWMEM_LIMIT - 1))
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#define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (LOWMEM_LIMIT - 1))
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#define ARCH_PFN_OFFSET PFN_DOWN(CONFIG_RAM_BASE)
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#define PAGE_OFFSET 0x80000000
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#define LOWMEM_LIMIT 0x40000000
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
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#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - \
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PHYS_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 VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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/*
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* main RAM and kernel working space are coincident at 0x80000000, but to make
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* life more interesting, there's also an uncached virtual shadow at 0xb0000000
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* - these mappings are fixed in the MMU
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*/
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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 /* __ASM_CSKY_PAGE_H */
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