pexpert/i386/pe_init.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * file: pe_init.c
  24  *    i386 platform expert initialization.
  25  */
  26 #include <sys/types.h>
  27 #include <mach/vm_param.h>
  28 #include <pexpert/protos.h>
  29 #include <pexpert/pexpert.h>
  30 #include <pexpert/boot.h>
  31 #include <pexpert/device_tree.h>
  32 #include <pexpert/pe_images.h>
  33 #include <kern/sched_prim.h>
  34
  35 #include "fakePPCStructs.h"
  36 #include "fakePPCDeviceTree.h"
  37 #include "boot_images.h"
  38
  39 /* extern references */
  40 extern void pe_identify_machine(void * args);
  41 extern void initialize_screen(void *, unsigned int);
  42
  43 /* Local references */
  44 static int         PE_fb_mode  = TEXT_MODE;
  45
  46 /* private globals */
  47 PE_state_t  PE_state;
  48 dt_data     gMemoryMapNode;
  49 dt_data     gDriversProp;
  50 dt_data     gRootpathProp;
  51 dt_data     gCompatibleProp;
  52
  53 /* Clock Frequency Info */
  54 clock_frequency_info_t gPEClockFrequencyInfo;
  55
  56 int PE_initialize_console( PE_Video * info, int op )
  57 {
  58     static int   last_console = -1;
  59     Boot_Video   bootInfo;
  60     Boot_Video * bInfo;
  61
  62     /*
  63      * Refuse changes from outside pexpert.
  64      * The video mode setup by the booter cannot be changed.
  65      */
  66     if ( info )
  67     {
  68         bootInfo.v_baseAddr = info->v_baseAddr;
  69         bootInfo.v_rowBytes      = info->v_rowBytes;
  70         bootInfo.v_width     = info->v_width;
  71         bootInfo.v_height    = info->v_height;
  72         bootInfo.v_depth     = info->v_depth;
  73         bInfo = &bootInfo;
  74         if (info == &PE_state.video) {
  75             bootInfo.v_display  = PE_fb_mode;
  76         } else {
  77             bootInfo.v_display  = GRAPHICS_MODE;
  78         }
  79     }
  80     else
  81         bInfo = 0;
  82
  83     switch ( op ) {
  84
  85         case kPEDisableScreen:
  86             initialize_screen((void *) bInfo, op);
  87 #ifdef FIXME
  88             last_console = switch_to_serial_console();
  89 #endif
  90             kprintf("kPEDisableScreen %d\n", last_console);
  91             break;
  92
  93         case kPEEnableScreen:
  94             initialize_screen((void *) bInfo, op);
  95             kprintf("kPEEnableScreen %d\n", last_console);
  96 #ifdef FIXME
  97             if( last_console != -1)
  98                 switch_to_old_console( last_console);
  99 #endif
 100             break;
 101
 102         default:
 103             initialize_screen((void *) bInfo, op);
 104             break;
 105     }
 106
 107     return 0;
 108 }
 109
 110 void PE_init_iokit(void)
 111 {
 112     long * dt;
 113     int    i;
 114     KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
 115     enum { kMaxBootVar = 128 };
 116     char *rdValue, *platformValue;
 117
 118     typedef struct {
 119         char            name[32];
 120         unsigned long   length;
 121         unsigned long   value[2];
 122     } DriversPackageProp;
 123
 124     PE_init_kprintf(TRUE);
 125     PE_init_printf(TRUE);
 126
 127     /*
 128      * Update the fake device tree with the driver information provided by
 129      * the booter.
 130      */
 131
 132     gDriversProp.length   = kap->numBootDrivers * sizeof(DriversPackageProp);
 133     gMemoryMapNode.length = 2 * sizeof(long);
 134
 135     rdValue = kalloc(kMaxBootVar);
 136     if ( PE_parse_boot_arg("rd", rdValue) ) {
 137         if (*rdValue == '*') {
 138             gRootpathProp.address = (rdValue + 1);
 139         } else {
 140             gRootpathProp.address = rdValue;
 141         }
 142         strcat(rdValue, ",");
 143     } else {
 144         gRootpathProp.address = rdValue;
 145         rdValue[0] = '\0';
 146     }
 147     strcat(rdValue, kap->bootFile);
 148     gRootpathProp.length = strlen(rdValue) + 1;
 149
 150     platformValue = kalloc(kMaxBootVar);
 151     if ( ! PE_parse_boot_arg("platform", platformValue) ) {
 152         strcpy(platformValue, kDefaultPlatformName);
 153     }
 154     gCompatibleProp.address = platformValue;
 155     gCompatibleProp.length = strlen(platformValue) + 1;
 156
 157     dt = (long *) createdt( fakePPCDeviceTree,
 158                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 159
 160     kfree(rdValue, kMaxBootVar);
 161     kfree(platformValue, kMaxBootVar);
 162
 163
 164     if ( dt )
 165     {
 166         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 167
 168         /* Copy driver info in kernBootStruct to fake device tree */
 169
 170         for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
 171         {
 172             switch ( kap->driverConfig[i].type )
 173             {
 174                 case kBootDriverTypeKEXT:
 175                     sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
 176                     break;
 177
 178                  case kBootDriverTypeMKEXT:
 179                     sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
 180                     break;
 181
 182                 default:
 183                     sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
 184                     break;
 185             }
 186             prop->length   = sizeof(prop->value);
 187             prop->value[0] = kap->driverConfig[i].address;
 188             prop->value[1] = kap->driverConfig[i].size;
 189         }
 190
 191         *((long *)gMemoryMapNode.address) = kap->numBootDrivers + 1;
 192     }
 193
 194     /* Setup powermac_info and powermac_machine_info structures */
 195
 196     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 197     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData = (unsigned long) kalloc(0x2000);
 198
 199     /*
 200      * Setup the OpenFirmware Device Tree routines
 201      * so the console can be found and the right I/O space
 202      * can be used..
 203      */
 204     DTInit(dt);
 205
 206     /*
 207      * Fetch the CLUT and the noroot image.
 208      */
 209     bcopy( (void *) (uintptr_t) bootClut, (void *) appleClut8, sizeof(appleClut8) );
 210
 211     default_noroot.width  = kFailedBootWidth;
 212     default_noroot.height = kFailedBootHeight;
 213     default_noroot.dx     = 0;
 214     default_noroot.dy     = kFailedBootOffset;
 215     default_noroot_data   = failedBootPict;
 216
 217     /*
 218      * Initialize the panic UI
 219      */
 220     panic_ui_initialize( (unsigned char *) appleClut8 );
 221
 222     /*
 223      * Initialize the spinning wheel (progress indicator).
 224      */
 225     vc_progress_initialize( &default_progress, default_progress_data,
 226                             (unsigned char *) appleClut8 );
 227
 228     (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
 229 }
 230
 231 void PE_init_platform(boolean_t vm_initialized, void * args)
 232 {
 233         if (PE_state.initialized == FALSE)
 234         {
 235             KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
 236
 237             PE_state.initialized        = TRUE;
 238             PE_state.bootArgs           = args;
 239             PE_state.video.v_baseAddr   = kap->video.v_baseAddr;
 240             PE_state.video.v_rowBytes   = kap->video.v_rowBytes;
 241             PE_state.video.v_height     = kap->video.v_height;
 242             PE_state.video.v_width      = kap->video.v_width;
 243             PE_state.video.v_depth      = kap->video.v_depth;
 244             PE_state.video.v_display    = kap->video.v_display;
 245             PE_fb_mode                  = kap->graphicsMode;
 246             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 247             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 248
 249         if (PE_fb_mode == TEXT_MODE)
 250         {
 251             /* Force a text display if the booter did not setup a
 252              * VESA frame buffer.
 253              */
 254             PE_state.video.v_display = 0;
 255         }
 256     }
 257
 258     if (!vm_initialized)
 259     {
 260                 /* Hack! FIXME.. */
 261         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 262         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 263
 264         pe_identify_machine(args);
 265     }
 266     else
 267     {
 268         pe_init_debug();
 269     }
 270 }
 271
 272 void PE_create_console( void )
 273 {
 274     if ( PE_state.video.v_display )
 275         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 276     else
 277         PE_initialize_console( &PE_state.video, kPETextMode );
 278 }
 279
 280 int PE_current_console( PE_Video * info )
 281 {
 282     *info = PE_state.video;
 283
 284     if ( PE_fb_mode == TEXT_MODE )
 285     {
 286         /*
 287          * FIXME: Prevent the IOBootFrameBuffer from starting up
 288          * when we are in Text mode.
 289          */
 290         info->v_baseAddr = 0;
 291
 292         /*
 293          * Scale the size of the text screen from characters
 294          * to pixels.
 295          */
 296         info->v_width  *= 8;   // CHARWIDTH
 297         info->v_height *= 16;  // CHARHEIGHT
 298     }
 299
 300     return (0);
 301 }
 302
 303 void PE_display_icon( __unused unsigned int flags, __unused const char * name )
 304 {
 305     if ( default_noroot_data )
 306         vc_display_icon( &default_noroot, default_noroot_data );
 307 }
 308
 309 extern boolean_t PE_get_hotkey( __unused unsigned char key )
 310 {
 311     return (FALSE);
 312 }
 313
 314 static timebase_callback_func gTimebaseCallback;
 315
 316 void PE_register_timebase_callback(timebase_callback_func callback)
 317 {
 318     gTimebaseCallback = callback;
 319
 320     PE_call_timebase_callback();
 321 }
 322
 323 void PE_call_timebase_callback(void)
 324 {
 325   struct timebase_freq_t timebase_freq;
 326   unsigned long          num, den, cnt;
 327
 328   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 329   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 330
 331   cnt = 2;
 332   while (cnt <= den) {
 333     if ((num % cnt) || (den % cnt)) {
 334       cnt++;
 335       continue;
 336     }
 337
 338     num /= cnt;
 339     den /= cnt;
 340   }
 341
 342   timebase_freq.timebase_num = num;
 343   timebase_freq.timebase_den = den;
 344
 345   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 346 }
 347
 348 /*
 349  * The default (non-functional) PE_poll_input handler.
 350  */
 351 static int
 352 PE_stub_poll_input(__unused unsigned int options, char * c)
 353 {
 354     *c = 0xff;
 355     return 1;  /* 0 for success, 1 for unsupported */
 356 }
 357
 358 /*
 359  * Called by the kernel debugger to poll for keyboard input.
 360  * Keyboard drivers may replace the default stub function
 361  * with their polled-mode input function.
 362  */
 363 int (*PE_poll_input)(unsigned int options, char * c)
 364         = PE_stub_poll_input;
 365
 366
 367