boot/m68k/stage2_nextmon.c

   1 /*
   2 ** Copyright 2002, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #include "stage2_priv.h"
   6
   7 #define MG_simm 0
   8 #define MG_flags 4
   9 #define MG_sid 6
  10 #define MG_pagesize 10
  11 #define MG_mon_stack 14
  12 #define MG_vbr 18
  13 #define MG_nvram 22
  14 #define MG_inetntoa 54
  15 #define MG_inputline 72
  16 #define MG_region 200
  17 #define MG_alloc_base 232
  18 #define MG_alloc_brk 236
  19 #define MG_boot_dev 240
  20 #define MG_boot_arg 244
  21 #define MG_boot_info 248
  22 #define MG_boot_file 252
  23 #define MG_bootfile 256
  24 #define MG_boot_how 320
  25 #define MG_km 324
  26 #define MG_km_flags 368
  27 #define MG_mon_init 370
  28 #define MG_si 374
  29 #define MG_time 378
  30 #define MG_sddp 382
  31 #define MG_dgp 386
  32 #define MG_s5cp 390
  33 #define MG_odc 394
  34 #define MG_odd 398
  35 #define MG_radix 402
  36 #define MG_dmachip 404
  37 #define MG_diskchip 408
  38 #define MG_intrstat 412
  39 #define MG_intrmask 416
  40 #define MG_nofault 420
  41 #define MG_fmt 424
  42 #define MG_addr 426
  43 #define MG_na 458
  44 #define MG_mx 462
  45 #define MG_my 466
  46 #define MG_cursor_save 470
  47 #define MG_getc 726
  48 #define MG_try_getc 730
  49 #define MG_putc 734
  50 #define MG_alert 738
  51 #define MG_alert_confirm 742
  52 #define MG_alloc 746
  53 #define MG_boot_slider 750
  54 #define MG_eventc 754
  55 #define MG_event_high 758
  56 #define MG_animate 762
  57 #define MG_anim_time 766
  58 #define MG_scsi_intr 770
  59 #define MG_scsi_intrarg 774
  60 #define MG_minor 778
  61 #define MG_seq 780
  62 #define MG_anim_run 782
  63 #define MG_major 786
  64 #define MG_con_slot 844
  65 #define MG_con_fbnum 845
  66 #define MG_con_map_vaddr0 860
  67 #define MG_con_map_vaddr1 872
  68 #define MG_con_map_vaddr2 884
  69 #define MG_con_map_vaddr3 896
  70 #define MG_con_map_vaddr4 908
  71 #define MG_con_map_vaddr5 920
  72
  73 #define MG_clientetheraddr 788
  74 #define MG_machine_type    936
  75 #define MG_board_rev       937
  76
  77 #define N_SIMM          4               /* number of SIMMs in machine */
  78
  79 /* SIMM types */
  80 #define SIMM_SIZE       0x03
  81 #define SIMM_SIZE_EMPTY 0x00
  82 #define SIMM_SIZE_16MB  0x01
  83 #define SIMM_SIZE_4MB   0x02
  84 #define SIMM_SIZE_1MB   0x03
  85 #define SIMM_PAGE_MODE  0x04
  86 #define SIMM_PARITY     0x08 /* ?? */
  87
  88 #define NEXT_RAMBASE 0x4000000
  89
  90 /* Machine types */
  91 #define NeXT_CUBE       0
  92 #define NeXT_WARP9      1
  93 #define NeXT_X15        2
  94 #define NeXT_WARP9C     3
  95 #define NeXT_TURBO 4
  96 #define NeXT_TURBO_COLOR 5
  97
  98 typedef int (*getcptr)(void);
  99 typedef int (*putcptr)(int);
 100
 101 #define MON(type, off) (*(type *)((unsigned int) (mg) + off))
 102
 103 static char *mg = 0;
 104
 105 int init_nextmon(char *monitor)
 106 {
 107         mg = monitor;
 108
 109         return 0;
 110 }
 111
 112 int probe_memory(kernel_args *ka)
 113 {
 114         int i, r;
 115         char machine_type = MON(char,MG_machine_type);
 116         int msize1, msize4, msize16;
 117
 118         /* depending on the machine, the bank layout is different */
 119         dprintf("machine type: 0x%x\n", machine_type);
 120         switch(machine_type) {
 121                 case NeXT_WARP9:
 122                 case NeXT_X15:
 123                         msize16 = 0x10000000;
 124                         msize4 = 0x400000;
 125                         msize1 = 0x100000;
 126                         break;
 127                 case NeXT_WARP9C:
 128                         msize16 = 0x800000;
 129                         msize4 = 0x200000;
 130                         msize1 = 0x80000;
 131                         break;
 132                 case NeXT_TURBO:
 133                 case NeXT_TURBO_COLOR:
 134                         msize16 = 0x2000000;
 135                         msize4 = 0x800000;
 136                         msize1 = 0x200000;
 137                         break;
 138                 default:
 139                         msize16 = 0x100000;
 140                         msize4 = 0x100000;
 141                         msize1 = 0x100000;
 142         }
 143
 144         /* start probing ram */
 145         dprintf("memory probe:\n");
 146         ka->num_phys_mem_ranges = 0;
 147         for(i=0; i<N_SIMM; i++) {
 148                 char probe = MON(char,MG_simm+i);
 149
 150                 if((probe & SIMM_SIZE) != SIMM_SIZE_EMPTY) {
 151                         ka->phys_mem_range[ka->num_phys_mem_ranges].start = NEXT_RAMBASE + (msize16 * i);
 152                 }
 153                 switch(probe & SIMM_SIZE) {
 154                         case SIMM_SIZE_16MB:
 155                                 ka->phys_mem_range[ka->num_phys_mem_ranges].size = msize16;
 156                                 break;
 157                         case SIMM_SIZE_4MB:
 158                                 ka->phys_mem_range[ka->num_phys_mem_ranges].size = msize4;
 159                                 break;
 160                         case SIMM_SIZE_1MB:
 161                                 ka->phys_mem_range[ka->num_phys_mem_ranges].size = msize1;
 162                                 break;
 163                 }
 164                 dprintf("bank %i: start 0x%x, size 0x%x\n", i,
 165                         ka->phys_mem_range[ka->num_phys_mem_ranges].start, ka->phys_mem_range[ka->num_phys_mem_ranges].size);
 166                 ka->num_phys_mem_ranges++;
 167         }
 168
 169         dprintf("alloc_base: 0x%x\n", MON(int, MG_alloc_base));
 170         dprintf("alloc_brk: 0x%x\n", MON(int, MG_alloc_brk));
 171         dprintf("mon_stack: 0x%x\n", MON(int, MG_mon_stack));
 172
 173         /* record allocated ram */
 174         ka->num_phys_alloc_ranges = 1;
 175         ka->phys_alloc_range[0].start = ROUNDOWN(MON(int, MG_alloc_base), PAGE_SIZE);
 176
 177         return 0;
 178 }
 179
 180 void putc(int c)
 181 {
 182         MON(putcptr,MG_putc)(c);
 183 }
 184
 185 int getc(void)
 186 {
 187         return(MON(getcptr,MG_getc)());
 188 }