arch/mips64/mm/loadmmu.c

   1 /* $Id: loadmmu.c,v 1.5 2000/01/27 01:05:24 ralf Exp $
   2  *
   3  * This file is subject to the terms and conditions of the GNU General Public
   4  * License.  See the file "COPYING" in the main directory of this archive
   5  * for more details.
   6  *
   7  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
   8  * Copyright (C) 1997, 1999 Ralf Baechle (ralf@gnu.org)
   9  * Copyright (C) 1999 Silicon Graphics, Inc.
  10  */
  11 #include <linux/config.h>
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/mm.h>
  16
  17 #include <asm/page.h>
  18 #include <asm/pgtable.h>
  19 #include <asm/system.h>
  20 #include <asm/bootinfo.h>
  21 #include <asm/sgialib.h>
  22
  23 /* memory functions */
  24 void (*_clear_page)(void * page);
  25 void (*_copy_page)(void * to, void * from);
  26
  27 /* Cache operations. */
  28 void (*_flush_cache_mm)(struct mm_struct *mm);
  29 void (*_flush_cache_range)(struct mm_struct *mm, unsigned long start,
  30                            unsigned long end);
  31 void (*_flush_cache_page)(struct vm_area_struct *vma, unsigned long page);
  32 void (*_flush_page_to_ram)(struct page * page);
  33
  34 /* MIPS specific cache operations */
  35 void (*_flush_cache_sigtramp)(unsigned long addr);
  36 void (*_flush_cache_l2)(void);
  37 void (*_flush_cache_l1)(void);
  38
  39
  40 /* DMA cache operations. */
  41 void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
  42 void (*_dma_cache_wback)(unsigned long start, unsigned long size);
  43 void (*_dma_cache_inv)(unsigned long start, unsigned long size);
  44
  45 /* TLB operations. */
  46 void (*_flush_tlb_all)(void);
  47 void (*_flush_tlb_mm)(struct mm_struct *mm);
  48 void (*_flush_tlb_range)(struct mm_struct *mm, unsigned long start,
  49                         unsigned long end);
  50 void (*_flush_tlb_page)(struct vm_area_struct *vma, unsigned long page);
  51
  52 /* Miscellaneous. */
  53 void (*update_mmu_cache)(struct vm_area_struct * vma,
  54                          unsigned long address, pte_t pte);
  55
  56 void (*_show_regs)(struct pt_regs *);
  57
  58 extern void ld_mmu_r4xx0(void);
  59 extern void ld_mmu_andes(void);
  60
  61 void __init load_mmu(void)
  62 {
  63         switch(mips_cputype) {
  64 #if defined (CONFIG_CPU_R4300)                                          \
  65     || defined (CONFIG_CPU_R4X00)                                       \
  66     || defined (CONFIG_CPU_R5000)                                       \
  67     || defined (CONFIG_CPU_NEVADA)
  68         case CPU_R4000PC:
  69         case CPU_R4000SC:
  70         case CPU_R4000MC:
  71         case CPU_R4200:
  72         case CPU_R4300:
  73         case CPU_R4400PC:
  74         case CPU_R4400SC:
  75         case CPU_R4400MC:
  76         case CPU_R4600:
  77         case CPU_R4640:
  78         case CPU_R4650:
  79         case CPU_R4700:
  80         case CPU_R5000:
  81         case CPU_R5000A:
  82         case CPU_NEVADA:
  83                 printk("Loading R4000 MMU routines.\n");
  84                 ld_mmu_r4xx0();
  85                 break;
  86 #endif
  87
  88 #if defined (CONFIG_CPU_R10000)
  89         case CPU_R10000:
  90                 printk("Loading R10000 MMU routines.\n");
  91                 ld_mmu_andes();
  92                 break;
  93 #endif
  94
  95         default:
  96                 /* XXX We need an generic routine in the MIPS port
  97                  * XXX to jabber stuff onto the screen on all machines
  98                  * XXX before the console is setup.  The ARCS prom
  99                  * XXX routines look good for this, but only the SGI
 100                  * XXX code has a full library for that at this time.
 101                  */
 102                 panic("Yeee, unsupported mmu/cache architecture or "
 103                       "wrong compiletime kernel configuration.");
 104         }
 105 }