mmu_decl.h
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上传日期:2013-02-24
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- /*
- * BK Id: %F% %I% %G% %U% %#%
- */
- /*
- * Declarations of procedures and variables shared between files
- * in arch/ppc/mm/.
- *
- * Derived from arch/ppc/mm/init.c:
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- * and Cort Dougan (PReP) (cort@cs.nmt.edu)
- * Copyright (C) 1996 Paul Mackerras
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
- *
- * Derived from "arch/i386/mm/init.c"
- * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
- extern void mapin_ram(void);
- extern void bat_mapin_ram(unsigned long bat2, unsigned long bat3);
- extern void adjust_total_lowmem(void);
- extern int map_page(unsigned long va, unsigned long pa, int flags);
- extern void setbat(int index, unsigned long virt, unsigned long phys,
- unsigned int size, int flags);
- extern void reserve_phys_mem(unsigned long start, unsigned long size);
- extern int __map_without_bats;
- extern void *end_of_DRAM;
- extern unsigned long ioremap_base;
- extern unsigned long ioremap_bot;
- extern unsigned int rtas_data, rtas_size;
- extern unsigned long total_memory;
- extern unsigned long total_lowmem;
- extern unsigned long ram_phys_base;
- extern int mem_init_done;
- extern PTE *Hash, *Hash_end;
- extern unsigned long Hash_size, Hash_mask;
- /* ...and now those things that may be slightly different between processor
- * architectures. -- Dan
- */
- #if defined(CONFIG_8xx)
- #define flush_HPTE(X, va, pg) _tlbie(va)
- #define MMU_init_hw() do { } while(0)
- #elif defined(CONFIG_4xx)
- #define flush_HPTE(X, va, pg) _tlbie(va)
- extern void MMU_init_hw(void);
- #else
- /* anything except 4xx or 8xx */
- extern void MMU_init_hw(void);
- /* Be careful....this needs to be updated if we ever encounter 603 SMPs,
- * which includes all new 82xx processors. We need tlbie/tlbsync here
- * in that case (I think). -- Dan.
- */
- static inline void flush_HPTE(unsigned context, unsigned long va, pte_t *pg)
- {
- if ((Hash != 0) &&
- (cur_cpu_spec[0]->cpu_features & CPU_FTR_HPTE_TABLE))
- flush_hash_page(0, va, pg);
- else
- _tlbie(va);
- }
- #endif