pexpert/i386/pe_init.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * file: pe_init.c
  27  *    i386 platform expert initialization.
  28  */
  29 #include <sys/types.h>
  30 #include <mach/vm_param.h>
  31 #include <pexpert/protos.h>
  32 #include <pexpert/pexpert.h>
  33 #include <pexpert/boot.h>
  34 #include <pexpert/device_tree.h>
  35 #include <pexpert/pe_images.h>
  36 #include <kern/sched_prim.h>
  37
  38 #include "fakePPCStructs.h"
  39 #include "fakePPCDeviceTree.h"
  40 #include "boot_images.h"
  41
  42 /* extern references */
  43 extern void pe_identify_machine(void * args);
  44 extern void initialize_screen(void *, unsigned int);
  45
  46 /* Local references */
  47 static vm_offset_t mapframebuffer(caddr_t,int);
  48 static vm_offset_t PE_fb_vaddr = 0;
  49 static int         PE_fb_mode  = TEXT_MODE;
  50 static KERNBOOTSTRUCT * PE_kbp = 0;
  51
  52 /* private globals */
  53 PE_state_t  PE_state;
  54 dt_data     gMemoryMapNode;
  55 dt_data     gDriversProp;
  56
  57 /* Clock Frequency Info */
  58 clock_frequency_info_t gPEClockFrequencyInfo;
  59
  60 int PE_initialize_console( PE_Video * info, int op )
  61 {
  62     static int   last_console = -1;
  63     Boot_Video   bootInfo;
  64     Boot_Video * bInfo;
  65
  66     /*
  67      * Refuse changes from outside pexpert.
  68      * The video mode setup by the booter cannot be changed.
  69      */
  70     if ( info && (info == &PE_state.video) )
  71     {
  72         bootInfo.v_baseAddr      = PE_fb_vaddr;
  73         bootInfo.v_rowBytes      = info->v_rowBytes;
  74         bootInfo.v_width     = info->v_width;
  75         bootInfo.v_height    = info->v_height;
  76         bootInfo.v_depth     = info->v_depth;
  77         bootInfo.v_display   = PE_fb_mode;
  78         bInfo = &bootInfo;
  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
 115     typedef struct {
 116         char            name[32];
 117         unsigned long   length;
 118         unsigned long   value[2];
 119     } DriversPackageProp;
 120
 121     /*
 122      * Update the fake device tree with the driver information provided by
 123      * the booter.
 124      */
 125
 126         gDriversProp.length   = PE_kbp->numBootDrivers * sizeof(DriversPackageProp);
 127     gMemoryMapNode.length = 2 * sizeof(long);
 128
 129     dt = (long *) createdt( fakePPCDeviceTree,
 130                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 131
 132     if ( dt )
 133     {
 134         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 135
 136         /* Copy driver info in kernBootStruct to fake device tree */
 137
 138         for ( i = 0; i < PE_kbp->numBootDrivers; i++, prop++ )
 139         {
 140             switch ( PE_kbp->driverConfig[i].type )
 141             {
 142                 case kBootDriverTypeKEXT:
 143                     sprintf(prop->name, "Driver-%lx", PE_kbp->driverConfig[i].address);
 144                     break;
 145
 146                  case kBootDriverTypeMKEXT:
 147                     sprintf(prop->name, "DriversPackage-%lx", PE_kbp->driverConfig[i].address);
 148                     break;
 149
 150                 default:
 151                     sprintf(prop->name, "DriverBogus-%lx", PE_kbp->driverConfig[i].address);
 152                     break;
 153             }
 154             prop->length   = sizeof(prop->value);
 155             prop->value[0] = PE_kbp->driverConfig[i].address;
 156             prop->value[1] = PE_kbp->driverConfig[i].size;
 157         }
 158
 159         *gMemoryMapNode.address = PE_kbp->numBootDrivers + 1;
 160     }
 161
 162     /* Setup powermac_info and powermac_machine_info structures */
 163
 164     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 165     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 166
 167     /*
 168      * Setup the OpenFirmware Device Tree routines
 169      * so the console can be found and the right I/O space
 170      * can be used..
 171      */
 172     DTInit(dt);
 173
 174     /*
 175      * Fetch the CLUT and the noroot image.
 176      */
 177     bcopy( bootClut, appleClut8, sizeof(appleClut8) );
 178
 179     default_noroot.width  = kFailedBootWidth;
 180     default_noroot.height = kFailedBootHeight;
 181     default_noroot.dx     = 0;
 182     default_noroot.dy     = kFailedBootOffset;
 183     default_noroot_data   = failedBootPict;
 184
 185     /*
 186      * Initialize the spinning wheel (progress indicator).
 187      */
 188     vc_progress_initialize( &default_progress, default_progress_data,
 189                             (unsigned char *) appleClut8 );
 190
 191     PE_initialize_console( (PE_Video *) 0, kPEAcquireScreen );
 192
 193     (void) StartIOKit( (void*)dt, (void*)PE_state.fakePPCBootArgs, 0, 0);
 194 }
 195
 196 void PE_init_platform(boolean_t vm_initialized, void * args)
 197 {
 198         if (PE_state.initialized == FALSE)
 199         {
 200         PE_kbp = (KERNBOOTSTRUCT *) args;
 201
 202             PE_state.initialized        = TRUE;
 203             PE_state.bootArgs           = args;
 204             PE_state.video.v_baseAddr   = PE_kbp->video.v_baseAddr;
 205             PE_state.video.v_rowBytes   = PE_kbp->video.v_rowBytes;
 206             PE_state.video.v_height     = PE_kbp->video.v_height;
 207             PE_state.video.v_width      = PE_kbp->video.v_width;
 208             PE_state.video.v_depth      = PE_kbp->video.v_depth;
 209         PE_state.video.v_display    = PE_kbp->video.v_display;
 210         PE_fb_mode                  = PE_kbp->graphicsMode;
 211             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 212             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 213
 214         if (PE_fb_mode == TEXT_MODE)
 215         {
 216             /* Force a text display if the booter did not setup a
 217              * VESA frame buffer.
 218              */
 219             PE_state.video.v_display = 0;
 220         }
 221     }
 222
 223         if (!vm_initialized)
 224         {
 225                 /* Hack! FIXME.. */
 226         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 227         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 228
 229         pe_identify_machine(args);
 230         }
 231         else
 232         {
 233         pe_init_debug();
 234
 235         PE_create_console();
 236         }
 237 }
 238
 239 void PE_create_console( void )
 240 {
 241     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 242     {
 243         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 244                                      (PE_fb_mode == TEXT_MODE)  ?
 245                       /* text mode */   PE_state.video.v_rowBytes :
 246                       /* grfx mode */   PE_state.video.v_rowBytes *
 247                                         PE_state.video.v_height);
 248     }
 249
 250         if (PE_state.video.v_display)
 251         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 252     else
 253         PE_initialize_console( &PE_state.video, kPETextMode );
 254 }
 255
 256 int PE_current_console( PE_Video * info )
 257 {
 258     *info = PE_state.video;
 259
 260     if ( PE_fb_mode == TEXT_MODE )
 261     {
 262         /*
 263          * FIXME: Prevent the IOBootFrameBuffer from starting up
 264          * when we are in Text mode.
 265          */
 266         info->v_baseAddr = 0;
 267
 268         /*
 269          * Scale the size of the text screen from characters
 270          * to pixels.
 271          */
 272         info->v_width  *= 8;   // CHARWIDTH
 273         info->v_height *= 16;  // CHARHEIGHT
 274     }
 275
 276     return (0);
 277 }
 278
 279 void PE_display_icon( unsigned int flags, const char * name )
 280 {
 281     if ( default_noroot_data )
 282         vc_display_icon( &default_noroot, default_noroot_data );
 283 }
 284
 285 extern boolean_t PE_get_hotkey( unsigned char key )
 286 {
 287     return (FALSE);
 288 }
 289
 290 static timebase_callback_func gTimebaseCallback;
 291
 292 void PE_register_timebase_callback(timebase_callback_func callback)
 293 {
 294     gTimebaseCallback = callback;
 295
 296     PE_call_timebase_callback();
 297 }
 298
 299 void PE_call_timebase_callback(void)
 300 {
 301   struct timebase_freq_t timebase_freq;
 302   unsigned long          num, den, cnt;
 303
 304   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 305   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 306
 307   cnt = 2;
 308   while (cnt <= den) {
 309     if ((num % cnt) || (den % cnt)) {
 310       cnt++;
 311       continue;
 312     }
 313
 314     num /= cnt;
 315     den /= cnt;
 316   }
 317
 318   timebase_freq.timebase_num = num;
 319   timebase_freq.timebase_den = den;
 320
 321   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 322 }
 323
 324 /*
 325  * map the framebuffer into kernel vm and return the (virtual)
 326  * address.
 327  */
 328 static vm_offset_t
 329 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 330                 int     length)    /* num bytes to map */
 331 {
 332     vm_offset_t vmaddr;
 333
 334         if (physaddr != (caddr_t)trunc_page(physaddr))
 335         panic("Framebuffer not on page boundary");
 336
 337         vmaddr = io_map((vm_offset_t)physaddr, length);
 338         if (vmaddr == 0)
 339         panic("can't alloc VM for framebuffer");
 340
 341     return vmaddr;
 342 }
 343
 344 /*
 345  * The default (non-functional) PE_poll_input handler.
 346  */
 347 static int
 348 PE_stub_poll_input(unsigned int options, char * c)
 349 {
 350     *c = 0xff;
 351     return 1;  /* 0 for success, 1 for unsupported */
 352 }
 353
 354 /*
 355  * Called by the kernel debugger to poll for keyboard input.
 356  * Keyboard drivers may replace the default stub function
 357  * with their polled-mode input function.
 358  */
 359 int (*PE_poll_input)(unsigned int options, char * c)
 360         = PE_stub_poll_input;