mmu.h

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#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 */