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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
* Copyright (C) 2012 Regents of the University of California
* Copyright (C) 2017 SiFive
* Copyright (C) 2017 XiaojingZhu <zhuxiaoj@ict.ac.cn>
*/
#ifndef _ASM_RISCV_PAGE_H
#define _ASM_RISCV_PAGE_H
#include <linux/pfn.h>
#include <linux/const.h>
#define PAGE_SHIFT (12)
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE - 1))
#define HPAGE_SHIFT PMD_SHIFT
#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
/*
* PAGE_OFFSET -- the first address of the first page of memory.
* When not using MMU this corresponds to the first free page in
* physical memory (aligned on a page boundary).
*/
#ifdef CONFIG_64BIT
#ifdef CONFIG_MMU
#define PAGE_OFFSET kernel_map.page_offset
#else
#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
#endif
/*
* By default, CONFIG_PAGE_OFFSET value corresponds to SV57 address space so
* define the PAGE_OFFSET value for SV48 and SV39.
*/
#define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL)
#define PAGE_OFFSET_L3 _AC(0xffffffd800000000, UL)
#else
#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
#endif /* CONFIG_64BIT */
#ifndef __ASSEMBLY__
#ifdef CONFIG_RISCV_ISA_ZICBOZ
void clear_page(void *page);
#else
#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
#endif
#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
#define clear_user_page(pgaddr, vaddr, page) clear_page(pgaddr)
#define copy_user_page(vto, vfrom, vaddr, topg) \
memcpy((vto), (vfrom), PAGE_SIZE)
/*
* Use struct definitions to apply C type checking
*/
/* Page Global Directory entry */
typedef struct {
unsigned long pgd;
} pgd_t;
/* Page Table entry */
typedef struct {
unsigned long pte;
} pte_t;
typedef struct {
unsigned long pgprot;
} pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) })
#define __pgd(x) ((pgd_t) { (x) })
#define __pgprot(x) ((pgprot_t) { (x) })
#ifdef CONFIG_64BIT
#define PTE_FMT "%016lx"
#else
#define PTE_FMT "%08lx"
#endif
#if defined(CONFIG_64BIT) && defined(CONFIG_MMU)
/*
* We override this value as its generic definition uses __pa too early in
* the boot process (before kernel_map.va_pa_offset is set).
*/
#define MIN_MEMBLOCK_ADDR 0
#endif
#ifdef CONFIG_MMU
#define ARCH_PFN_OFFSET (PFN_DOWN((unsigned long)phys_ram_base))
#else
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#endif /* CONFIG_MMU */
struct kernel_mapping {
unsigned long page_offset;
unsigned long virt_addr;
unsigned long virt_offset;
uintptr_t phys_addr;
uintptr_t size;
/* Offset between linear mapping virtual address and kernel load address */
unsigned long va_pa_offset;
/* Offset between kernel mapping virtual address and kernel load address */
unsigned long va_kernel_pa_offset;
unsigned long va_kernel_xip_pa_offset;
#ifdef CONFIG_XIP_KERNEL
uintptr_t xiprom;
uintptr_t xiprom_sz;
#endif
};
extern struct kernel_mapping kernel_map;
extern phys_addr_t phys_ram_base;
extern unsigned long vmemmap_start_pfn;
#define is_kernel_mapping(x) \
((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))
#define is_linear_mapping(x) \
((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < PAGE_OFFSET + KERN_VIRT_SIZE))
#ifndef CONFIG_DEBUG_VIRTUAL
#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset))
#else
void *linear_mapping_pa_to_va(unsigned long x);
#endif
#define kernel_mapping_pa_to_va(y) ({ \
unsigned long _y = (unsigned long)(y); \
(IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \
(void *)(_y + kernel_map.va_kernel_xip_pa_offset) : \
(void *)(_y + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \
})
#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x)
#ifndef CONFIG_DEBUG_VIRTUAL
#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset)
#else
phys_addr_t linear_mapping_va_to_pa(unsigned long x);
#endif
#define kernel_mapping_va_to_pa(y) ({ \
unsigned long _y = (unsigned long)(y); \
(IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \
(_y - kernel_map.va_kernel_xip_pa_offset) : \
(_y - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \
})
#define __va_to_pa_nodebug(x) ({ \
unsigned long _x = x; \
is_linear_mapping(_x) ? \
linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \
})
#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);
extern phys_addr_t __phys_addr_symbol(unsigned long x);
#else
#define __virt_to_phys(x) __va_to_pa_nodebug(x)
#define __phys_addr_symbol(x) __va_to_pa_nodebug(x)
#endif /* CONFIG_DEBUG_VIRTUAL */
#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
#define __pa(x) __virt_to_phys((unsigned long)(x))
#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x)))
#define phys_to_pfn(phys) (PFN_DOWN(phys))
#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr)))
#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
unsigned long kaslr_offset(void);
#endif /* __ASSEMBLY__ */
#define virt_addr_valid(vaddr) ({ \
unsigned long _addr = (unsigned long)vaddr; \
(unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
})
#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* _ASM_RISCV_PAGE_H */