57d7909e0d
This patch takes the definitions for the PPC44x MMU (a software loaded TLB) from asm-ppc/mmu.h, cleans them up of things no longer necessary in arch/powerpc and puts them in a new asm-powerpc/mmu_44x.h file. It also substantially simplifies arch/powerpc/mm/44x_mmu.c and makes a couple of small fixes necessary for the 44x MMU code to build and work properly in arch/powerpc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* Declarations of procedures and variables shared between files
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* in arch/ppc/mm/.
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*
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* Derived from arch/ppc/mm/init.c:
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
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* and Cort Dougan (PReP) (cort@cs.nmt.edu)
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* Copyright (C) 1996 Paul Mackerras
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* Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
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*
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* Derived from "arch/i386/mm/init.c"
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* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/mm.h>
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#include <asm/tlbflush.h>
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#include <asm/mmu.h>
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extern void hash_preload(struct mm_struct *mm, unsigned long ea,
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unsigned long access, unsigned long trap);
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#ifdef CONFIG_PPC32
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extern void mapin_ram(void);
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extern int map_page(unsigned long va, phys_addr_t pa, int flags);
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extern void setbat(int index, unsigned long virt, unsigned long phys,
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unsigned int size, int flags);
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extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
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unsigned int size, int flags, unsigned int pid);
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extern void invalidate_tlbcam_entry(int index);
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extern int __map_without_bats;
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extern unsigned long ioremap_base;
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extern unsigned int rtas_data, rtas_size;
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struct _PTE;
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extern struct _PTE *Hash, *Hash_end;
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extern unsigned long Hash_size, Hash_mask;
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extern unsigned int num_tlbcam_entries;
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#endif
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extern unsigned long ioremap_bot;
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extern unsigned long __max_low_memory;
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extern unsigned long __initial_memory_limit;
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extern unsigned long total_memory;
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extern unsigned long total_lowmem;
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/* ...and now those things that may be slightly different between processor
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* architectures. -- Dan
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*/
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#if defined(CONFIG_8xx)
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#define flush_HPTE(X, va, pg) _tlbie(va)
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#define MMU_init_hw() do { } while(0)
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#define mmu_mapin_ram() (0UL)
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#elif defined(CONFIG_4xx)
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#define flush_HPTE(X, va, pg) _tlbie(va)
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extern void MMU_init_hw(void);
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extern unsigned long mmu_mapin_ram(void);
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#elif defined(CONFIG_FSL_BOOKE)
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#define flush_HPTE(X, va, pg) _tlbie(va)
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extern void MMU_init_hw(void);
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extern unsigned long mmu_mapin_ram(void);
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extern void adjust_total_lowmem(void);
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#elif defined(CONFIG_PPC32)
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/* anything 32-bit except 4xx or 8xx */
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extern void MMU_init_hw(void);
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extern unsigned long mmu_mapin_ram(void);
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/* Be careful....this needs to be updated if we ever encounter 603 SMPs,
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* which includes all new 82xx processors. We need tlbie/tlbsync here
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* in that case (I think). -- Dan.
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*/
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static inline void flush_HPTE(unsigned context, unsigned long va,
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unsigned long pdval)
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{
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if ((Hash != 0) &&
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cpu_has_feature(CPU_FTR_HPTE_TABLE))
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flush_hash_pages(0, va, pdval, 1);
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else
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_tlbie(va);
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}
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#else /* CONFIG_PPC64 */
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/* imalloc region types */
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#define IM_REGION_UNUSED 0x1
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#define IM_REGION_SUBSET 0x2
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#define IM_REGION_EXISTS 0x4
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#define IM_REGION_OVERLAP 0x8
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#define IM_REGION_SUPERSET 0x10
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extern struct vm_struct * im_get_free_area(unsigned long size);
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extern struct vm_struct * im_get_area(unsigned long v_addr, unsigned long size,
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int region_type);
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extern void im_free(void *addr);
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#endif
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