1 files changed, 107 insertions, 0 deletions
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
new file mode 100644
index 000000000..172e329fd
--- /dev/null
+++ b/arch/sh/include/asm/mmu.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __MMU_H
+#define __MMU_H
+
+/*
+ * Privileged Space Mapping Buffer (PMB) definitions
+ */
+#define PMB_PASCR		0xff000070
+#define PMB_IRMCR		0xff000078
+
+#define PASCR_SE		0x80000000
+
+#define PMB_ADDR		0xf6100000
+#define PMB_DATA		0xf7100000
+
+#define NR_PMB_ENTRIES		16
+
+#define PMB_E_MASK		0x0000000f
+#define PMB_E_SHIFT		8
+
+#define PMB_PFN_MASK		0xff000000
+
+#define PMB_SZ_16M		0x00000000
+#define PMB_SZ_64M		0x00000010
+#define PMB_SZ_128M		0x00000080
+#define PMB_SZ_512M		0x00000090
+#define PMB_SZ_MASK		PMB_SZ_512M
+#define PMB_C			0x00000008
+#define PMB_WT			0x00000001
+#define PMB_UB			0x00000200
+#define PMB_CACHE_MASK		(PMB_C | PMB_WT | PMB_UB)
+#define PMB_V			0x00000100
+
+#define PMB_NO_ENTRY		(-1)
+
+#ifndef __ASSEMBLY__
+#include <linux/errno.h>
+#include <linux/threads.h>
+#include <asm/page.h>
+
+/* Default "unsigned long" context */
+typedef unsigned long mm_context_id_t[NR_CPUS];
+
+typedef struct {
+#ifdef CONFIG_MMU
+	mm_context_id_t		id;
+	void			*vdso;
+#else
+	unsigned long		end_brk;
+#endif
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+	unsigned long		exec_fdpic_loadmap;
+	unsigned long		interp_fdpic_loadmap;
+#endif
+} mm_context_t;
+
+#ifdef CONFIG_PMB
+/* arch/sh/mm/pmb.c */
+bool __in_29bit_mode(void);
+
+void pmb_init(void);
+int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
+		     unsigned long size, pgprot_t prot);
+void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
+			       pgprot_t prot, void *caller);
+int pmb_unmap(void __iomem *addr);
+
+#else
+
+static inline int
+pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
+		 unsigned long size, pgprot_t prot)
+{
+	return -EINVAL;
+}
+
+static inline void __iomem *
+pmb_remap_caller(phys_addr_t phys, unsigned long size,
+		 pgprot_t prot, void *caller)
+{
+	return NULL;
+}
+
+static inline int pmb_unmap(void __iomem *addr)
+{
+	return -EINVAL;
+}
+
+#define pmb_init(addr)		do { } while (0)
+
+#ifdef CONFIG_29BIT
+#define __in_29bit_mode()	(1)
+#else
+#define __in_29bit_mode()	(0)
+#endif
+
+#endif /* CONFIG_PMB */
+
+static inline void __iomem *
+pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
+{
+	return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __MMU_H */