[linux-2.6-block.git] / arch / sh / include / asm / mmu.h

/* 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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef __MMU_H
	3	#define __MMU_H
	4
0c7b1df6 PM	5	/*
	6	* Privileged Space Mapping Buffer (PMB) definitions
	7	*/
	8	#define PMB_PASCR 0xff000070
	9	#define PMB_IRMCR 0xff000078
	10
1f69b6af MF	11	#define PASCR_SE 0x80000000
1f69b6af MF	12
0c7b1df6 PM	13	#define PMB_ADDR 0xf6100000
0c7b1df6 PM	14	#define PMB_DATA 0xf7100000
51becfd9 PM	15
	16	#define NR_PMB_ENTRIES 16
	17
0c7b1df6 PM	18	#define PMB_E_MASK 0x0000000f
	19	#define PMB_E_SHIFT 8
	20
20b5014b MF	21	#define PMB_PFN_MASK 0xff000000
20b5014b MF	22
0c7b1df6 PM	23	#define PMB_SZ_16M 0x00000000
	24	#define PMB_SZ_64M 0x00000010
	25	#define PMB_SZ_128M 0x00000080
	26	#define PMB_SZ_512M 0x00000090
	27	#define PMB_SZ_MASK PMB_SZ_512M
	28	#define PMB_C 0x00000008
	29	#define PMB_WT 0x00000001
	30	#define PMB_UB 0x00000200
efd54ea3	31	#define PMB_CACHE_MASK (PMB_C \| PMB_WT \| PMB_UB)
0c7b1df6 PM	32	#define PMB_V 0x00000100
	33
	34	#define PMB_NO_ENTRY (-1)
	35
3b4df71b	36	#ifndef __ASSEMBLY__
46c4e5da	37	#include <linux/errno.h>
2efa53b2	38	#include <linux/threads.h>
7bdda620	39	#include <asm/page.h>
3b4df71b FV	40
	41	/* Default "unsigned long" context */
	42	typedef unsigned long mm_context_id_t[NR_CPUS];
	43
	44	typedef struct {
	45	#ifdef CONFIG_MMU
	46	mm_context_id_t id;
	47	void *vdso;
	48	#else
	49	unsigned long end_brk;
	50	#endif
	51	#ifdef CONFIG_BINFMT_ELF_FDPIC
	52	unsigned long exec_fdpic_loadmap;
	53	unsigned long interp_fdpic_loadmap;
	54	#endif
	55	} mm_context_t;
	56
a0ab3668	57	#ifdef CONFIG_PMB
0c7b1df6	58	/* arch/sh/mm/pmb.c */
2efa53b2	59	bool __in_29bit_mode(void);
90e7d649 PM	60
	61	void pmb_init(void);
	62	int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
	63	unsigned long size, pgprot_t prot);
	64	void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
	65	pgprot_t prot, void *caller);
	66	int pmb_unmap(void __iomem *addr);
	67
a0ab3668	68	#else
90e7d649	69
089b43f9 PM	70	static inline int
	71	pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
	72	unsigned long size, pgprot_t prot)
	73	{
	74	return -EINVAL;
	75	}
	76
90e7d649 PM	77	static inline void __iomem *
	78	pmb_remap_caller(phys_addr_t phys, unsigned long size,
	79	pgprot_t prot, void *caller)
	80	{
	81	return NULL;
	82	}
	83
	84	static inline int pmb_unmap(void __iomem *addr)
a0ab3668	85	{
46c4e5da	86	return -EINVAL;
a0ab3668 PM	87	}
a0ab3668 PM	88
d01447b3	89	#define pmb_init(addr) do { } while (0)
a0ab3668	90
2efa53b2 PM	91	#ifdef CONFIG_29BIT
	92	#define __in_29bit_mode() (1)
	93	#else
	94	#define __in_29bit_mode() (0)
	95	#endif
	96
	97	#endif /* CONFIG_PMB */
90e7d649 PM	98
	99	static inline void __iomem *
	100	pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
	101	{
	102	return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
	103	}
	104
3b4df71b	105	#endif /* __ASSEMBLY__ */
0c7b1df6 PM	106
0c7b1df6 PM	107	#endif /* __MMU_H */