90e7d649d8
This implements a fairly significant overhaul of the dynamic PMB mapping code. The primary change here is that the PMB gets its own VMA that follows the uncached mapping and we attempt to be a bit more intelligent with dynamic sizing, multi-entry mapping, and so forth. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
99 lines
2 KiB
C
99 lines
2 KiB
C
#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 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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