| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_POWERPC_NOHASH_32_PTE_FSL_BOOKE_H |
| #define _ASM_POWERPC_NOHASH_32_PTE_FSL_BOOKE_H |
| #ifdef __KERNEL__ |
| |
| /* PTE bit definitions for Freescale BookE SW loaded TLB MMU based |
| * processors |
| * |
| MMU Assist Register 3: |
| |
| 32 33 34 35 36 ... 50 51 52 53 54 55 56 57 58 59 60 61 62 63 |
| RPN...................... 0 0 U0 U1 U2 U3 UX SX UW SW UR SR |
| |
| - PRESENT *must* be in the bottom three bits because swap cache |
| entries use the top 29 bits. |
| |
| */ |
| |
| /* Definitions for FSL Book-E Cores */ |
| #define _PAGE_PRESENT 0x00001 /* S: PTE contains a translation */ |
| #define _PAGE_USER 0x00002 /* S: User page (maps to UR) */ |
| #define _PAGE_RW 0x00004 /* S: Write permission (SW) */ |
| #define _PAGE_DIRTY 0x00008 /* S: Page dirty */ |
| #define _PAGE_EXEC 0x00010 /* H: SX permission */ |
| #define _PAGE_ACCESSED 0x00020 /* S: Page referenced */ |
| |
| #define _PAGE_ENDIAN 0x00040 /* H: E bit */ |
| #define _PAGE_GUARDED 0x00080 /* H: G bit */ |
| #define _PAGE_COHERENT 0x00100 /* H: M bit */ |
| #define _PAGE_NO_CACHE 0x00200 /* H: I bit */ |
| #define _PAGE_WRITETHRU 0x00400 /* H: W bit */ |
| #define _PAGE_SPECIAL 0x00800 /* S: Special page */ |
| |
| #define _PAGE_KERNEL_RO 0 |
| #define _PAGE_KERNEL_ROX _PAGE_EXEC |
| #define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW) |
| #define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_EXEC) |
| |
| /* No page size encoding in the linux PTE */ |
| #define _PAGE_PSIZE 0 |
| |
| #define _PMD_PRESENT 0 |
| #define _PMD_PRESENT_MASK (PAGE_MASK) |
| #define _PMD_BAD (~PAGE_MASK) |
| #define _PMD_USER 0 |
| |
| #define _PTE_NONE_MASK 0 |
| |
| #define PTE_WIMGE_SHIFT (6) |
| |
| /* |
| * We define 2 sets of base prot bits, one for basic pages (ie, |
| * cacheable kernel and user pages) and one for non cacheable |
| * pages. We always set _PAGE_COHERENT when SMP is enabled or |
| * the processor might need it for DMA coherency. |
| */ |
| #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED) |
| #if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC) |
| #define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT) |
| #else |
| #define _PAGE_BASE (_PAGE_BASE_NC) |
| #endif |
| |
| /* Permission masks used to generate the __P and __S table */ |
| #define PAGE_NONE __pgprot(_PAGE_BASE) |
| #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) |
| #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC) |
| #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) |
| #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) |
| #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) |
| #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_NOHASH_32_PTE_FSL_BOOKE_H */ |
