/* 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 __ASSEMBLER__
#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 /* __ASSEMBLER__ */

#endif /* __MMU_H */