aec5e0e1c1
Previously this was implemented using a global cache, cache this per-CPU instead and bump up the number of context IDs to match NR_CPUS. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#ifndef __MMU_H
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#define __MMU_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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struct vm_list_struct *vmlist;
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unsigned long end_brk;
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#endif
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} mm_context_t;
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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 PMB_ADDR 0xf6100000
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#define PMB_DATA 0xf7100000
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#define PMB_ENTRY_MAX 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_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_V 0x00000100
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#define PMB_NO_ENTRY (-1)
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struct pmb_entry;
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struct pmb_entry {
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unsigned long vpn;
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unsigned long ppn;
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unsigned long flags;
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/*
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* 0 .. NR_PMB_ENTRIES for specific entry selection, or
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* PMB_NO_ENTRY to search for a free one
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*/
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int entry;
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struct pmb_entry *next;
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/* Adjacent entry link for contiguous multi-entry mappings */
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struct pmb_entry *link;
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};
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/* arch/sh/mm/pmb.c */
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int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
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unsigned long flags, int *entry);
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int set_pmb_entry(struct pmb_entry *pmbe);
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void clear_pmb_entry(struct pmb_entry *pmbe);
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struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
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unsigned long flags);
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void pmb_free(struct pmb_entry *pmbe);
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long pmb_remap(unsigned long virt, unsigned long phys,
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unsigned long size, unsigned long flags);
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void pmb_unmap(unsigned long addr);
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#endif /* __MMU_H */
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