1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_NOHASH_PTE_BOOK3E_H 3 #define _ASM_POWERPC_NOHASH_PTE_BOOK3E_H 4 #ifdef __KERNEL__ 5 6 /* PTE bit definitions for processors compliant to the Book3E 7 * architecture 2.06 or later. The position of the PTE bits 8 * matches the HW definition of the optional Embedded Page Table 9 * category. 10 */ 11 12 /* Architected bits */ 13 #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */ 14 #define _PAGE_SW1 0x000002 15 #define _PAGE_BIT_SWAP_TYPE 2 16 #define _PAGE_BAP_SR 0x000004 17 #define _PAGE_BAP_UR 0x000008 18 #define _PAGE_BAP_SW 0x000010 19 #define _PAGE_BAP_UW 0x000020 20 #define _PAGE_BAP_SX 0x000040 21 #define _PAGE_BAP_UX 0x000080 22 #define _PAGE_PSIZE_MSK 0x000f00 23 #define _PAGE_PSIZE_4K 0x000200 24 #define _PAGE_PSIZE_8K 0x000300 25 #define _PAGE_PSIZE_16K 0x000400 26 #define _PAGE_PSIZE_32K 0x000500 27 #define _PAGE_PSIZE_64K 0x000600 28 #define _PAGE_PSIZE_128K 0x000700 29 #define _PAGE_PSIZE_256K 0x000800 30 #define _PAGE_PSIZE_512K 0x000900 31 #define _PAGE_PSIZE_1M 0x000a00 32 #define _PAGE_PSIZE_2M 0x000b00 33 #define _PAGE_PSIZE_4M 0x000c00 34 #define _PAGE_PSIZE_8M 0x000d00 35 #define _PAGE_PSIZE_16M 0x000e00 36 #define _PAGE_PSIZE_32M 0x000f00 37 #define _PAGE_DIRTY 0x001000 /* C: page changed */ 38 #define _PAGE_SW0 0x002000 39 #define _PAGE_U3 0x004000 40 #define _PAGE_U2 0x008000 41 #define _PAGE_U1 0x010000 42 #define _PAGE_U0 0x020000 43 #define _PAGE_ACCESSED 0x040000 44 #define _PAGE_ENDIAN 0x080000 45 #define _PAGE_GUARDED 0x100000 46 #define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */ 47 #define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */ 48 #define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */ 49 50 /* "Higher level" linux bit combinations */ 51 #define _PAGE_EXEC (_PAGE_BAP_SX | _PAGE_BAP_UX) /* .. and was cache cleaned */ 52 #define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */ 53 #define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY) 54 #define _PAGE_KERNEL_RO (_PAGE_BAP_SR) 55 #define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX) 56 #define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX) 57 #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */ 58 #define _PAGE_PRIVILEGED (_PAGE_BAP_SR) 59 60 #define _PAGE_SPECIAL _PAGE_SW0 61 62 /* Base page size */ 63 #define _PAGE_PSIZE _PAGE_PSIZE_4K 64 #define PTE_RPN_SHIFT (24) 65 66 #define PTE_WIMGE_SHIFT (19) 67 #define PTE_BAP_SHIFT (2) 68 69 /* On 32-bit, we never clear the top part of the PTE */ 70 #ifdef CONFIG_PPC32 71 #define _PTE_NONE_MASK 0xffffffff00000000ULL 72 #define _PMD_PRESENT 0 73 #define _PMD_PRESENT_MASK (PAGE_MASK) 74 #define _PMD_BAD (~PAGE_MASK) 75 #define _PMD_USER 0 76 #else 77 #define _PTE_NONE_MASK 0 78 #endif 79 80 /* 81 * We define 2 sets of base prot bits, one for basic pages (ie, 82 * cacheable kernel and user pages) and one for non cacheable 83 * pages. We always set _PAGE_COHERENT when SMP is enabled or 84 * the processor might need it for DMA coherency. 85 */ 86 #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE) 87 #if defined(CONFIG_SMP) 88 #define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT) 89 #else 90 #define _PAGE_BASE (_PAGE_BASE_NC) 91 #endif 92 93 /* Permission masks used to generate the __P and __S table */ 94 #define PAGE_NONE __pgprot(_PAGE_BASE) 95 #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) 96 #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_BAP_UX) 97 #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) 98 #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX) 99 #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) 100 #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX) 101 102 #ifndef __ASSEMBLY__ pte_mkprivileged(pte_t pte)103static inline pte_t pte_mkprivileged(pte_t pte) 104 { 105 return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED); 106 } 107 108 #define pte_mkprivileged pte_mkprivileged 109 pte_mkuser(pte_t pte)110static inline pte_t pte_mkuser(pte_t pte) 111 { 112 return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER); 113 } 114 115 #define pte_mkuser pte_mkuser 116 pte_mkexec(pte_t pte)117static inline pte_t pte_mkexec(pte_t pte) 118 { 119 if (pte_val(pte) & _PAGE_BAP_UR) 120 return __pte((pte_val(pte) & ~_PAGE_BAP_SX) | _PAGE_BAP_UX); 121 else 122 return __pte((pte_val(pte) & ~_PAGE_BAP_UX) | _PAGE_BAP_SX); 123 } 124 #define pte_mkexec pte_mkexec 125 126 #endif /* __ASSEMBLY__ */ 127 128 #endif /* __KERNEL__ */ 129 #endif /* _ASM_POWERPC_NOHASH_PTE_BOOK3E_H */ 130