1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_NOHASH_32_PTE_85xx_H 3 #define _ASM_POWERPC_NOHASH_32_PTE_85xx_H 4 #ifdef __KERNEL__ 5 6 /* PTE bit definitions for Freescale BookE SW loaded TLB MMU based 7 * processors 8 * 9 MMU Assist Register 3: 10 11 32 33 34 35 36 ... 50 51 52 53 54 55 56 57 58 59 60 61 62 63 12 RPN...................... 0 0 U0 U1 U2 U3 UX SX UW SW UR SR 13 14 - PRESENT *must* be in the bottom three bits because swap cache 15 entries use the top 29 bits. 16 17 */ 18 19 /* Definitions for FSL Book-E Cores */ 20 #define _PAGE_PRESENT 0x00001 /* S: PTE contains a translation */ 21 #define _PAGE_USER 0x00002 /* S: User page (maps to UR) */ 22 #define _PAGE_RW 0x00004 /* S: Write permission (SW) */ 23 #define _PAGE_DIRTY 0x00008 /* S: Page dirty */ 24 #define _PAGE_EXEC 0x00010 /* H: SX permission */ 25 #define _PAGE_ACCESSED 0x00020 /* S: Page referenced */ 26 27 #define _PAGE_ENDIAN 0x00040 /* H: E bit */ 28 #define _PAGE_GUARDED 0x00080 /* H: G bit */ 29 #define _PAGE_COHERENT 0x00100 /* H: M bit */ 30 #define _PAGE_NO_CACHE 0x00200 /* H: I bit */ 31 #define _PAGE_WRITETHRU 0x00400 /* H: W bit */ 32 #define _PAGE_SPECIAL 0x00800 /* S: Special page */ 33 34 #define _PAGE_KERNEL_RO 0 35 #define _PAGE_KERNEL_ROX _PAGE_EXEC 36 #define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW) 37 #define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_EXEC) 38 39 /* No page size encoding in the linux PTE */ 40 #define _PAGE_PSIZE 0 41 42 #define _PMD_PRESENT 0 43 #define _PMD_PRESENT_MASK (PAGE_MASK) 44 #define _PMD_BAD (~PAGE_MASK) 45 #define _PMD_USER 0 46 47 #define _PTE_NONE_MASK 0 48 49 #define PTE_WIMGE_SHIFT (6) 50 51 /* 52 * We define 2 sets of base prot bits, one for basic pages (ie, 53 * cacheable kernel and user pages) and one for non cacheable 54 * pages. We always set _PAGE_COHERENT when SMP is enabled or 55 * the processor might need it for DMA coherency. 56 */ 57 #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED) 58 #if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC) 59 #define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT) 60 #else 61 #define _PAGE_BASE (_PAGE_BASE_NC) 62 #endif 63 64 /* Permission masks used to generate the __P and __S table */ 65 #define PAGE_NONE __pgprot(_PAGE_BASE) 66 #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) 67 #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC) 68 #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) 69 #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) 70 #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) 71 #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) 72 73 #endif /* __KERNEL__ */ 74 #endif /* _ASM_POWERPC_NOHASH_32_PTE_FSL_85xx_H */ 75