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) // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #ifndef __ASM_CSKY_PGTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #define __ASM_CSKY_PGTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <asm/memory.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <abi/pgtable-bits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <asm-generic/pgtable-nopmd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define PGDIR_SHIFT		22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define PGDIR_MASK		(~(PGDIR_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define USER_PTRS_PER_PGD	(0x80000000UL/PGDIR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define FIRST_USER_ADDRESS	0UL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * C-SKY is two-level paging structure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define PGD_ORDER	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define PTE_ORDER	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define PTRS_PER_PGD	((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define PTRS_PER_PMD	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define PTRS_PER_PTE	((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define pte_ERROR(e) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define pgd_ERROR(e) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define pmd_page(pmd)	(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define pte_clear(mm, addr, ptep)	set_pte((ptep), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	(((unsigned int) addr & PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define pte_none(pte)		(!(pte_val(pte) & ~_PAGE_GLOBAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define pte_present(pte)	(pte_val(pte) & _PAGE_PRESENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define pte_pfn(x)	((unsigned long)((x).pte_low >> PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define pfn_pte(pfn, prot) __pte(((unsigned long long)(pfn) << PAGE_SHIFT) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 				| pgprot_val(prot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define __READABLE	(_PAGE_READ | _PAGE_VALID | _PAGE_ACCESSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define __WRITEABLE	(_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define _PAGE_CHG_MASK	(PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 			 _CACHE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define __swp_type(x)			(((x).val >> 4) & 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define __swp_offset(x)			((x).val >> 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define __swp_entry(type, offset)	((swp_entry_t) {((type) << 4) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 					((offset) << 12) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #define __swp_entry_to_pte(x)		((pte_t) { (x).val })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define pte_page(x)			pfn_to_page(pte_pfn(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define __mk_pte(page_nr, pgprot)	__pte(((page_nr) << PAGE_SHIFT) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 					pgprot_val(pgprot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * CSKY can't do page protection for execute, and considers that the same like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  * read. Also, write permissions imply read permissions. This is the closest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * we can get by reasonable means..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define PAGE_NONE	__pgprot(_PAGE_PRESENT | _CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				_CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) #define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				_PAGE_GLOBAL | _CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) #define PAGE_USERIO	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				_CACHE_CACHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #define _PAGE_IOREMAP \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	(_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	 _CACHE_UNCACHED | _PAGE_SO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define __P000	PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define __P001	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #define __P010	PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define __P011	PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define __P100	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #define __P101	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #define __P110	PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define __P111	PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #define __S000	PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #define __S001	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define __S010	PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #define __S011	PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #define __S100	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) #define __S101	PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #define __S110	PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) #define __S111	PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) #define ZERO_PAGE(vaddr)	(virt_to_page(empty_zero_page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) extern void load_pgd(unsigned long pg_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) extern pte_t invalid_pte_table[PTRS_PER_PTE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline void set_pte(pte_t *p, pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	*p = pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #if defined(CONFIG_CPU_NEED_TLBSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	dcache_wb_line((u32)p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	/* prevent out of order excution */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	smp_mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline pte_t *pmd_page_vaddr(pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	unsigned long ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	ptr = pmd_val(pmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return __va(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define pmd_phys(pmd) pmd_val(pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static inline void set_pmd(pmd_t *p, pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	*p = pmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #if defined(CONFIG_CPU_NEED_TLBSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	dcache_wb_line((u32)p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/* prevent specul excute */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	smp_mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static inline int pmd_none(pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return pmd_val(pmd) == __pa(invalid_pte_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define pmd_bad(pmd)	(pmd_val(pmd) & ~PAGE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static inline int pmd_present(pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	return (pmd_val(pmd) != __pa(invalid_pte_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static inline void pmd_clear(pmd_t *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	pmd_val(*p) = (__pa(invalid_pte_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #if defined(CONFIG_CPU_NEED_TLBSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	dcache_wb_line((u32)p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  * The following only work if pte_present() is true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  * Undefined behaviour if not..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static inline int pte_read(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	return pte.pte_low & _PAGE_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static inline int pte_write(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return (pte).pte_low & _PAGE_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static inline int pte_dirty(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return (pte).pte_low & _PAGE_MODIFIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static inline int pte_young(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return (pte).pte_low & _PAGE_ACCESSED;
^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) static inline pte_t pte_wrprotect(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_DIRTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static inline pte_t pte_mkclean(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_DIRTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static inline pte_t pte_mkold(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_VALID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static inline pte_t pte_mkwrite(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	pte_val(pte) |= _PAGE_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (pte_val(pte) & _PAGE_MODIFIED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		pte_val(pte) |= _PAGE_DIRTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static inline pte_t pte_mkdirty(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	pte_val(pte) |= _PAGE_MODIFIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (pte_val(pte) & _PAGE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		pte_val(pte) |= _PAGE_DIRTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static inline pte_t pte_mkyoung(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	pte_val(pte) |= _PAGE_ACCESSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (pte_val(pte) & _PAGE_READ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		pte_val(pte) |= _PAGE_VALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define __HAVE_PHYS_MEM_ACCESS_PROT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 				     unsigned long size, pgprot_t vma_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)  * Macro to make mark a page protection value as "uncacheable".  Note
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * that "protection" is really a misnomer here as the protection value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * contains the memory attribute bits, dirty bits, and various other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * bits as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) #define pgprot_noncached pgprot_noncached
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static inline pgprot_t pgprot_noncached(pgprot_t _prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	unsigned long prot = pgprot_val(_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED | _PAGE_SO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	return __pgprot(prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #define pgprot_writecombine pgprot_writecombine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	unsigned long prot = pgprot_val(_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	return __pgprot(prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)  * Conversion functions: convert a page and protection to a page entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)  * and a page entry and page directory to the page they refer to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) #define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		     (pgprot_val(newprot)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) extern void paging_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		      pte_t *pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #define kern_addr_valid(addr)	(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	remap_pfn_range(vma, vaddr, pfn, size, prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #endif /* __ASM_CSKY_PGTABLE_H */