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-rw-r--r--arch/powerpc/include/asm/nohash/pte-e500.h129
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diff --git a/arch/powerpc/include/asm/nohash/pte-e500.h b/arch/powerpc/include/asm/nohash/pte-e500.h
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+++ b/arch/powerpc/include/asm/nohash/pte-e500.h
@@ -0,0 +1,129 @@
+/* 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 */