| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_POWERPC_NOHASH_PTE_E500_H |
| #define _ASM_POWERPC_NOHASH_PTE_E500_H |
| #ifdef __KERNEL__ |
| |
| /* PTE bit definitions for processors compliant to the Book3E |
| * architecture 2.06 or later. The position of the PTE bits |
| * matches the HW definition of the optional Embedded Page Table |
| * category. |
| */ |
| |
| /* Architected bits */ |
| #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */ |
| #define _PAGE_SW1 0x000002 |
| #define _PAGE_BIT_SWAP_TYPE 2 |
| #define _PAGE_BAP_SR 0x000004 |
| #define _PAGE_BAP_UR 0x000008 |
| #define _PAGE_BAP_SW 0x000010 |
| #define _PAGE_BAP_UW 0x000020 |
| #define _PAGE_BAP_SX 0x000040 |
| #define _PAGE_BAP_UX 0x000080 |
| #define _PAGE_PSIZE_MSK 0x000f00 |
| #define _PAGE_PSIZE_4K 0x000200 |
| #define _PAGE_PSIZE_8K 0x000300 |
| #define _PAGE_PSIZE_16K 0x000400 |
| #define _PAGE_PSIZE_32K 0x000500 |
| #define _PAGE_PSIZE_64K 0x000600 |
| #define _PAGE_PSIZE_128K 0x000700 |
| #define _PAGE_PSIZE_256K 0x000800 |
| #define _PAGE_PSIZE_512K 0x000900 |
| #define _PAGE_PSIZE_1M 0x000a00 |
| #define _PAGE_PSIZE_2M 0x000b00 |
| #define _PAGE_PSIZE_4M 0x000c00 |
| #define _PAGE_PSIZE_8M 0x000d00 |
| #define _PAGE_PSIZE_16M 0x000e00 |
| #define _PAGE_PSIZE_32M 0x000f00 |
| #define _PAGE_DIRTY 0x001000 /* C: page changed */ |
| #define _PAGE_SW0 0x002000 |
| #define _PAGE_U3 0x004000 |
| #define _PAGE_U2 0x008000 |
| #define _PAGE_U1 0x010000 |
| #define _PAGE_U0 0x020000 |
| #define _PAGE_ACCESSED 0x040000 |
| #define _PAGE_ENDIAN 0x080000 |
| #define _PAGE_GUARDED 0x100000 |
| #define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */ |
| #define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */ |
| #define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */ |
| |
| /* "Higher level" linux bit combinations */ |
| #define _PAGE_EXEC (_PAGE_BAP_SX | _PAGE_BAP_UX) /* .. and was cache cleaned */ |
| #define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */ |
| #define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY) |
| #define _PAGE_KERNEL_RO (_PAGE_BAP_SR) |
| #define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX) |
| #define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX) |
| #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */ |
| #define _PAGE_PRIVILEGED (_PAGE_BAP_SR) |
| |
| #define _PAGE_SPECIAL _PAGE_SW0 |
| |
| /* Base page size */ |
| #define _PAGE_PSIZE _PAGE_PSIZE_4K |
| #define PTE_RPN_SHIFT (24) |
| |
| #define PTE_WIMGE_SHIFT (19) |
| #define PTE_BAP_SHIFT (2) |
| |
| /* On 32-bit, we never clear the top part of the PTE */ |
| #ifdef CONFIG_PPC32 |
| #define _PTE_NONE_MASK 0xffffffff00000000ULL |
| #define _PMD_PRESENT 0 |
| #define _PMD_PRESENT_MASK (PAGE_MASK) |
| #define _PMD_BAD (~PAGE_MASK) |
| #define _PMD_USER 0 |
| #else |
| #define _PTE_NONE_MASK 0 |
| #endif |
| |
| /* |
| * 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 | _PAGE_PSIZE) |
| #if defined(CONFIG_SMP) |
| #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_BAP_UX) |
| #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) |
| #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX) |
| #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) |
| #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_BAP_UX) |
| |
| #ifndef __ASSEMBLY__ |
| static inline pte_t pte_mkprivileged(pte_t pte) |
| { |
| return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED); |
| } |
| |
| #define pte_mkprivileged pte_mkprivileged |
| |
| static inline pte_t pte_mkuser(pte_t pte) |
| { |
| return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER); |
| } |
| |
| #define pte_mkuser pte_mkuser |
| |
| static inline pte_t pte_mkexec(pte_t pte) |
| { |
| if (pte_val(pte) & _PAGE_BAP_UR) |
| return __pte((pte_val(pte) & ~_PAGE_BAP_SX) | _PAGE_BAP_UX); |
| else |
| return __pte((pte_val(pte) & ~_PAGE_BAP_UX) | _PAGE_BAP_SX); |
| } |
| #define pte_mkexec pte_mkexec |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_NOHASH_PTE_E500_H */ |
