130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ASM_POWERPC_NOHASH_PTE_BOOK3E_H
|
||
|
|
#define _ASM_POWERPC_NOHASH_PTE_BOOK3E_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_BOOK3E_H */
|