Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #ifndef __ASM_SH_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #define __ASM_SH_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 1999  Niibe Yutaka
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/const.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /* PAGE_SHIFT determines the page size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #if defined(CONFIG_PAGE_SIZE_4KB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) # define PAGE_SHIFT	12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #elif defined(CONFIG_PAGE_SIZE_8KB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) # define PAGE_SHIFT	13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #elif defined(CONFIG_PAGE_SIZE_16KB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) # define PAGE_SHIFT	14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #elif defined(CONFIG_PAGE_SIZE_64KB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) # define PAGE_SHIFT	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) # error "Bogus kernel page size?"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define PAGE_MASK	(~(PAGE_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define PTE_MASK	PAGE_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define HPAGE_SHIFT	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define HPAGE_SHIFT	18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define HPAGE_SHIFT	20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define HPAGE_SHIFT	22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define HPAGE_SHIFT	26
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #ifdef CONFIG_HUGETLB_PAGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define HPAGE_SIZE		(1UL << HPAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define HPAGE_MASK		(~(HPAGE_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT-PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #include <asm/uncached.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) extern unsigned long shm_align_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) extern unsigned long max_low_pfn, min_low_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) extern unsigned long memory_start, memory_end, memory_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) pages_do_alias(unsigned long addr1, unsigned long addr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return (addr1 ^ addr2) & shm_align_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) extern void copy_page(void *to, void *from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define copy_user_page(to, from, vaddr, pg)  __copy_user(to, from, PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) struct page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) struct vm_area_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) extern void copy_user_highpage(struct page *to, struct page *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			       unsigned long vaddr, struct vm_area_struct *vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #define __HAVE_ARCH_COPY_USER_HIGHPAGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) extern void clear_user_highpage(struct page *page, unsigned long vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #define clear_user_highpage	clear_user_highpage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * These are used to make use of C type-checking..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) #ifdef CONFIG_X2TLB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) typedef struct { unsigned long pte_low, pte_high; } pte_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) typedef struct { unsigned long long pgprot; } pgprot_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) typedef struct { unsigned long long pgd; } pgd_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define pte_val(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	((x).pte_low | ((unsigned long long)(x).pte_high << 32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define __pte(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) typedef struct { unsigned long pte_low; } pte_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) typedef struct { unsigned long pgprot; } pgprot_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) typedef struct { unsigned long pgd; } pgd_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define pte_val(x)	((x).pte_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #define __pte(x)	((pte_t) { (x) } )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define pgd_val(x)	((x).pgd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #define pgprot_val(x)	((x).pgprot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) #define __pgd(x) ((pgd_t) { (x) } )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #define __pgprot(x)	((pgprot_t) { (x) } )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) typedef struct page *pgtable_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) #define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * __MEMORY_START and SIZE are the physical addresses and size of RAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define __MEMORY_START		CONFIG_MEMORY_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define __MEMORY_SIZE		CONFIG_MEMORY_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)  * PHYSICAL_OFFSET is the offset in physical memory where the base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * of the kernel is loaded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #ifdef CONFIG_PHYSICAL_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define PHYSICAL_OFFSET (CONFIG_PHYSICAL_START - __MEMORY_START)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define PHYSICAL_OFFSET 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  * PAGE_OFFSET is the virtual address of the start of kernel address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  * space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define PAGE_OFFSET		CONFIG_PAGE_OFFSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  * Virtual to physical RAM address translation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  * In 29 bit mode, the physical offset of RAM from address 0 is visible in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  * the kernel virtual address space, and thus we don't have to take
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * this into account when translating. However in 32 bit mode this offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  * is not visible (it is part of the PMB mapping) and so needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  * added or subtracted as required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #ifdef CONFIG_PMB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define ___pa(x)	((x)-PAGE_OFFSET+__MEMORY_START)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define ___va(x)	((x)+PAGE_OFFSET-__MEMORY_START)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #define ___pa(x)	((x)-PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define ___va(x)	((x)+PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define __pa(x)		___pa((unsigned long)x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define __va(x)		(void *)___va((unsigned long)x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #ifdef CONFIG_UNCACHED_MAPPING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #if defined(CONFIG_29BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define UNCAC_ADDR(addr)	P2SEGADDR(addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define CAC_ADDR(addr)		P1SEGADDR(addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #define UNCAC_ADDR(addr)	((addr) - PAGE_OFFSET + uncached_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define CAC_ADDR(addr)		((addr) - uncached_start + PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #define UNCAC_ADDR(addr)	((addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #define CAC_ADDR(addr)		((addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)  * PFN = physical frame number (ie PFN 0 == physical address 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)  * PFN_START is the PFN of the first page of RAM. By defining this we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)  * don't have struct page entries for the portion of address space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  * between physical address 0 and the start of RAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #define PFN_START		(__MEMORY_START >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #define ARCH_PFN_OFFSET		(PFN_START)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) #ifdef CONFIG_FLATMEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #include <asm-generic/memory_model.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #include <asm-generic/getorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  * Some drivers need to perform DMA into kmalloc'ed buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  * and so we have to increase the kmalloc minalign for this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #endif /* __ASM_SH_PAGE_H */