pexpert/i386/pe_init.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * file: pe_init.c
  32  *    i386 platform expert initialization.
  33  */
  34 #include <sys/types.h>
  35 #include <mach/vm_param.h>
  36 #include <pexpert/protos.h>
  37 #include <pexpert/pexpert.h>
  38 #include <pexpert/boot.h>
  39 #include <pexpert/device_tree.h>
  40 #include <pexpert/pe_images.h>
  41 #include <kern/sched_prim.h>
  42
  43 #include "fakePPCStructs.h"
  44 #include "fakePPCDeviceTree.h"
  45 #include "boot_images.h"
  46
  47 /* extern references */
  48 extern void pe_identify_machine(void * args);
  49 extern void initialize_screen(void *, unsigned int);
  50
  51 /* Local references */
  52 static int         PE_fb_mode  = TEXT_MODE;
  53
  54 /* private globals */
  55 PE_state_t  PE_state;
  56 dt_data     gMemoryMapNode;
  57 dt_data     gDriversProp;
  58 dt_data     gRootpathProp;
  59 dt_data     gCompatibleProp;
  60
  61 /* Clock Frequency Info */
  62 clock_frequency_info_t gPEClockFrequencyInfo;
  63
  64 int PE_initialize_console( PE_Video * info, int op )
  65 {
  66     static int   last_console = -1;
  67     Boot_Video   bootInfo;
  68     Boot_Video * bInfo;
  69
  70     /*
  71      * Refuse changes from outside pexpert.
  72      * The video mode setup by the booter cannot be changed.
  73      */
  74     if ( info )
  75     {
  76         bootInfo.v_baseAddr = info->v_baseAddr;
  77         bootInfo.v_rowBytes      = info->v_rowBytes;
  78         bootInfo.v_width     = info->v_width;
  79         bootInfo.v_height    = info->v_height;
  80         bootInfo.v_depth     = info->v_depth;
  81         bInfo = &bootInfo;
  82         if (info == &PE_state.video) {
  83             bootInfo.v_display  = PE_fb_mode;
  84         } else {
  85             bootInfo.v_display  = GRAPHICS_MODE;
  86         }
  87     }
  88     else
  89         bInfo = 0;
  90
  91     switch ( op ) {
  92
  93         case kPEDisableScreen:
  94             initialize_screen((void *) bInfo, op);
  95 #ifdef FIXME
  96             last_console = switch_to_serial_console();
  97 #endif
  98             kprintf("kPEDisableScreen %d\n", last_console);
  99             break;
 100
 101         case kPEEnableScreen:
 102             initialize_screen((void *) bInfo, op);
 103             kprintf("kPEEnableScreen %d\n", last_console);
 104 #ifdef FIXME
 105             if( last_console != -1)
 106                 switch_to_old_console( last_console);
 107 #endif
 108             break;
 109
 110         default:
 111             initialize_screen((void *) bInfo, op);
 112             break;
 113     }
 114
 115     return 0;
 116 }
 117
 118 void PE_init_iokit(void)
 119 {
 120     long * dt;
 121     int    i;
 122     KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
 123     enum { kMaxBootVar = 128 };
 124     char *rdValue, *platformValue;
 125
 126     typedef struct {
 127         char            name[32];
 128         unsigned long   length;
 129         unsigned long   value[2];
 130     } DriversPackageProp;
 131
 132     PE_init_kprintf(TRUE);
 133     PE_init_printf(TRUE);
 134
 135     /*
 136      * Update the fake device tree with the driver information provided by
 137      * the booter.
 138      */
 139
 140     gDriversProp.length   = kap->numBootDrivers * sizeof(DriversPackageProp);
 141     gMemoryMapNode.length = 2 * sizeof(long);
 142
 143     rdValue = kalloc(kMaxBootVar);
 144     if ( PE_parse_boot_arg("rd", rdValue) ) {
 145         if (*rdValue == '*') {
 146             gRootpathProp.address = (rdValue + 1);
 147         } else {
 148             gRootpathProp.address = rdValue;
 149         }
 150         strcat(rdValue, ",");
 151     } else {
 152         gRootpathProp.address = rdValue;
 153         rdValue[0] = '\0';
 154     }
 155     strcat(rdValue, kap->bootFile);
 156     gRootpathProp.length = strlen(rdValue) + 1;
 157
 158     platformValue = kalloc(kMaxBootVar);
 159     if ( ! PE_parse_boot_arg("platform", platformValue) ) {
 160         strcpy(platformValue, kDefaultPlatformName);
 161     }
 162     gCompatibleProp.address = platformValue;
 163     gCompatibleProp.length = strlen(platformValue) + 1;
 164
 165     dt = (long *) createdt( fakePPCDeviceTree,
 166                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 167
 168     kfree(rdValue, kMaxBootVar);
 169     kfree(platformValue, kMaxBootVar);
 170
 171
 172     if ( dt )
 173     {
 174         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 175
 176         /* Copy driver info in kernBootStruct to fake device tree */
 177
 178         for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
 179         {
 180             switch ( kap->driverConfig[i].type )
 181             {
 182                 case kBootDriverTypeKEXT:
 183                     sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
 184                     break;
 185
 186                  case kBootDriverTypeMKEXT:
 187                     sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
 188                     break;
 189
 190                 default:
 191                     sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
 192                     break;
 193             }
 194             prop->length   = sizeof(prop->value);
 195             prop->value[0] = kap->driverConfig[i].address;
 196             prop->value[1] = kap->driverConfig[i].size;
 197         }
 198
 199         *((long *)gMemoryMapNode.address) = kap->numBootDrivers + 1;
 200     }
 201
 202     /* Setup powermac_info and powermac_machine_info structures */
 203
 204     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 205     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData = (unsigned long) kalloc(0x2000);
 206
 207     /*
 208      * Setup the OpenFirmware Device Tree routines
 209      * so the console can be found and the right I/O space
 210      * can be used..
 211      */
 212     DTInit(dt);
 213
 214     /*
 215      * Fetch the CLUT and the noroot image.
 216      */
 217     bcopy( (void *) (uintptr_t) bootClut, (void *) appleClut8, sizeof(appleClut8) );
 218
 219     default_noroot.width  = kFailedBootWidth;
 220     default_noroot.height = kFailedBootHeight;
 221     default_noroot.dx     = 0;
 222     default_noroot.dy     = kFailedBootOffset;
 223     default_noroot_data   = failedBootPict;
 224
 225     /*
 226      * Initialize the panic UI
 227      */
 228     panic_ui_initialize( (unsigned char *) appleClut8 );
 229
 230     /*
 231      * Initialize the spinning wheel (progress indicator).
 232      */
 233     vc_progress_initialize( &default_progress, default_progress_data,
 234                             (unsigned char *) appleClut8 );
 235
 236     (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
 237 }
 238
 239 void PE_init_platform(boolean_t vm_initialized, void * args)
 240 {
 241         if (PE_state.initialized == FALSE)
 242         {
 243             KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
 244
 245             PE_state.initialized        = TRUE;
 246             PE_state.bootArgs           = args;
 247             PE_state.video.v_baseAddr   = kap->video.v_baseAddr;
 248             PE_state.video.v_rowBytes   = kap->video.v_rowBytes;
 249             PE_state.video.v_height     = kap->video.v_height;
 250             PE_state.video.v_width      = kap->video.v_width;
 251             PE_state.video.v_depth      = kap->video.v_depth;
 252             PE_state.video.v_display    = kap->video.v_display;
 253             PE_fb_mode                  = kap->graphicsMode;
 254             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 255             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 256
 257         if (PE_fb_mode == TEXT_MODE)
 258         {
 259             /* Force a text display if the booter did not setup a
 260              * VESA frame buffer.
 261              */
 262             PE_state.video.v_display = 0;
 263         }
 264     }
 265
 266     if (!vm_initialized)
 267     {
 268                 /* Hack! FIXME.. */
 269         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 270         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 271
 272         pe_identify_machine(args);
 273     }
 274     else
 275     {
 276         pe_init_debug();
 277     }
 278 }
 279
 280 void PE_create_console( void )
 281 {
 282     if ( PE_state.video.v_display )
 283         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 284     else
 285         PE_initialize_console( &PE_state.video, kPETextMode );
 286 }
 287
 288 int PE_current_console( PE_Video * info )
 289 {
 290     *info = PE_state.video;
 291
 292     if ( PE_fb_mode == TEXT_MODE )
 293     {
 294         /*
 295          * FIXME: Prevent the IOBootFrameBuffer from starting up
 296          * when we are in Text mode.
 297          */
 298         info->v_baseAddr = 0;
 299
 300         /*
 301          * Scale the size of the text screen from characters
 302          * to pixels.
 303          */
 304         info->v_width  *= 8;   // CHARWIDTH
 305         info->v_height *= 16;  // CHARHEIGHT
 306     }
 307
 308     return (0);
 309 }
 310
 311 void PE_display_icon( __unused unsigned int flags, __unused const char * name )
 312 {
 313     if ( default_noroot_data )
 314         vc_display_icon( &default_noroot, default_noroot_data );
 315 }
 316
 317 extern boolean_t PE_get_hotkey( __unused unsigned char key )
 318 {
 319     return (FALSE);
 320 }
 321
 322 static timebase_callback_func gTimebaseCallback;
 323
 324 void PE_register_timebase_callback(timebase_callback_func callback)
 325 {
 326     gTimebaseCallback = callback;
 327
 328     PE_call_timebase_callback();
 329 }
 330
 331 void PE_call_timebase_callback(void)
 332 {
 333   struct timebase_freq_t timebase_freq;
 334   unsigned long          num, den, cnt;
 335
 336   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 337   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 338
 339   cnt = 2;
 340   while (cnt <= den) {
 341     if ((num % cnt) || (den % cnt)) {
 342       cnt++;
 343       continue;
 344     }
 345
 346     num /= cnt;
 347     den /= cnt;
 348   }
 349
 350   timebase_freq.timebase_num = num;
 351   timebase_freq.timebase_den = den;
 352
 353   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 354 }
 355
 356 /*
 357  * The default (non-functional) PE_poll_input handler.
 358  */
 359 static int
 360 PE_stub_poll_input(__unused unsigned int options, char * c)
 361 {
 362     *c = 0xff;
 363     return 1;  /* 0 for success, 1 for unsupported */
 364 }
 365
 366 /*
 367  * Called by the kernel debugger to poll for keyboard input.
 368  * Keyboard drivers may replace the default stub function
 369  * with their polled-mode input function.
 370  */
 371 int (*PE_poll_input)(unsigned int options, char * c)
 372         = PE_stub_poll_input;
 373
 374
 375