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