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 vm_offset_t mapframebuffer(caddr_t,int);
  45 static vm_offset_t PE_fb_vaddr = 0;
  46 static int         PE_fb_mode  = TEXT_MODE;
  47 static KERNBOOTSTRUCT * PE_kbp = 0;
  48
  49 /* private globals */
  50 PE_state_t  PE_state;
  51 dt_data     gMemoryMapNode;
  52 dt_data     gDriversProp;
  53
  54 /* Clock Frequency Info */
  55 clock_frequency_info_t gPEClockFrequencyInfo;
  56
  57 int PE_initialize_console( PE_Video * info, int op )
  58 {
  59     static int   last_console = -1;
  60     Boot_Video   bootInfo;
  61     Boot_Video * bInfo;
  62
  63     /*
  64      * Refuse changes from outside pexpert.
  65      * The video mode setup by the booter cannot be changed.
  66      */
  67     if ( info && (info == &PE_state.video) )
  68     {
  69         bootInfo.v_baseAddr      = PE_fb_vaddr;
  70         bootInfo.v_rowBytes      = info->v_rowBytes;
  71         bootInfo.v_width     = info->v_width;
  72         bootInfo.v_height    = info->v_height;
  73         bootInfo.v_depth     = info->v_depth;
  74         bootInfo.v_display   = PE_fb_mode;
  75         bInfo = &bootInfo;
  76     }
  77     else
  78         bInfo = 0;
  79
  80     switch ( op ) {
  81
  82         case kPEDisableScreen:
  83             initialize_screen((void *) bInfo, op);
  84 #ifdef FIXME
  85             last_console = switch_to_serial_console();
  86 #endif
  87             kprintf("kPEDisableScreen %d\n", last_console);
  88             break;
  89
  90         case kPEEnableScreen:
  91             initialize_screen((void *) bInfo, op);
  92             kprintf("kPEEnableScreen %d\n", last_console);
  93 #ifdef FIXME
  94             if( last_console != -1)
  95                 switch_to_old_console( last_console);
  96 #endif
  97             break;
  98
  99         default:
 100             initialize_screen((void *) bInfo, op);
 101             break;
 102     }
 103
 104     return 0;
 105 }
 106
 107 void PE_init_iokit(void)
 108 {
 109     long * dt;
 110     int    i;
 111
 112     typedef struct {
 113         char            name[32];
 114         unsigned long   length;
 115         unsigned long   value[2];
 116     } DriversPackageProp;
 117
 118     /*
 119      * Update the fake device tree with the driver information provided by
 120      * the booter.
 121      */
 122
 123         gDriversProp.length   = PE_kbp->numBootDrivers * sizeof(DriversPackageProp);
 124     gMemoryMapNode.length = 2 * sizeof(long);
 125
 126     dt = (long *) createdt( fakePPCDeviceTree,
 127                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 128
 129     if ( dt )
 130     {
 131         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 132
 133         /* Copy driver info in kernBootStruct to fake device tree */
 134
 135         for ( i = 0; i < PE_kbp->numBootDrivers; i++, prop++ )
 136         {
 137             switch ( PE_kbp->driverConfig[i].type )
 138             {
 139                 case kBootDriverTypeKEXT:
 140                     sprintf(prop->name, "Driver-%lx", PE_kbp->driverConfig[i].address);
 141                     break;
 142
 143                  case kBootDriverTypeMKEXT:
 144                     sprintf(prop->name, "DriversPackage-%lx", PE_kbp->driverConfig[i].address);
 145                     break;
 146
 147                 default:
 148                     sprintf(prop->name, "DriverBogus-%lx", PE_kbp->driverConfig[i].address);
 149                     break;
 150             }
 151             prop->length   = sizeof(prop->value);
 152             prop->value[0] = PE_kbp->driverConfig[i].address;
 153             prop->value[1] = PE_kbp->driverConfig[i].size;
 154         }
 155
 156         *gMemoryMapNode.address = PE_kbp->numBootDrivers + 1;
 157     }
 158
 159     /* Setup powermac_info and powermac_machine_info structures */
 160
 161     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 162     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 163
 164     /*
 165      * Setup the OpenFirmware Device Tree routines
 166      * so the console can be found and the right I/O space
 167      * can be used..
 168      */
 169     DTInit(dt);
 170
 171     /*
 172      * Fetch the CLUT and the noroot image.
 173      */
 174     bcopy( bootClut, appleClut8, sizeof(appleClut8) );
 175
 176     default_noroot.width  = kFailedBootWidth;
 177     default_noroot.height = kFailedBootHeight;
 178     default_noroot.dx     = 0;
 179     default_noroot.dy     = kFailedBootOffset;
 180     default_noroot_data   = failedBootPict;
 181
 182     /*
 183      * Initialize the spinning wheel (progress indicator).
 184      */
 185     vc_progress_initialize( &default_progress, default_progress_data,
 186                             (unsigned char *) appleClut8 );
 187
 188     PE_initialize_console( (PE_Video *) 0, kPEAcquireScreen );
 189
 190     (void) StartIOKit( (void*)dt, (void*)PE_state.fakePPCBootArgs, 0, 0);
 191 }
 192
 193 void PE_init_platform(boolean_t vm_initialized, void * args)
 194 {
 195         if (PE_state.initialized == FALSE)
 196         {
 197         PE_kbp = (KERNBOOTSTRUCT *) args;
 198
 199             PE_state.initialized        = TRUE;
 200             PE_state.bootArgs           = args;
 201             PE_state.video.v_baseAddr   = PE_kbp->video.v_baseAddr;
 202             PE_state.video.v_rowBytes   = PE_kbp->video.v_rowBytes;
 203             PE_state.video.v_height     = PE_kbp->video.v_height;
 204             PE_state.video.v_width      = PE_kbp->video.v_width;
 205             PE_state.video.v_depth      = PE_kbp->video.v_depth;
 206         PE_state.video.v_display    = PE_kbp->video.v_display;
 207         PE_fb_mode                  = PE_kbp->graphicsMode;
 208             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 209             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 210
 211         if (PE_fb_mode == TEXT_MODE)
 212         {
 213             /* Force a text display if the booter did not setup a
 214              * VESA frame buffer.
 215              */
 216             PE_state.video.v_display = 0;
 217         }
 218     }
 219
 220         if (!vm_initialized)
 221         {
 222                 /* Hack! FIXME.. */
 223         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 224         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 225
 226         pe_identify_machine(args);
 227         }
 228         else
 229         {
 230         pe_init_debug();
 231
 232         PE_create_console();
 233         }
 234 }
 235
 236 void PE_create_console( void )
 237 {
 238     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 239     {
 240         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 241                                      (PE_fb_mode == TEXT_MODE)  ?
 242                       /* text mode */   PE_state.video.v_rowBytes :
 243                       /* grfx mode */   PE_state.video.v_rowBytes *
 244                                         PE_state.video.v_height);
 245     }
 246
 247         if (PE_state.video.v_display)
 248         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 249     else
 250         PE_initialize_console( &PE_state.video, kPETextMode );
 251 }
 252
 253 int PE_current_console( PE_Video * info )
 254 {
 255     *info = PE_state.video;
 256
 257     if ( PE_fb_mode == TEXT_MODE )
 258     {
 259         /*
 260          * FIXME: Prevent the IOBootFrameBuffer from starting up
 261          * when we are in Text mode.
 262          */
 263         info->v_baseAddr = 0;
 264
 265         /*
 266          * Scale the size of the text screen from characters
 267          * to pixels.
 268          */
 269         info->v_width  *= 8;   // CHARWIDTH
 270         info->v_height *= 16;  // CHARHEIGHT
 271     }
 272
 273     return (0);
 274 }
 275
 276 void PE_display_icon( unsigned int flags, const char * name )
 277 {
 278     if ( default_noroot_data )
 279         vc_display_icon( &default_noroot, default_noroot_data );
 280 }
 281
 282 extern boolean_t PE_get_hotkey( unsigned char key )
 283 {
 284     return (FALSE);
 285 }
 286
 287 static timebase_callback_func gTimebaseCallback;
 288
 289 void PE_register_timebase_callback(timebase_callback_func callback)
 290 {
 291     gTimebaseCallback = callback;
 292
 293     PE_call_timebase_callback();
 294 }
 295
 296 void PE_call_timebase_callback(void)
 297 {
 298   struct timebase_freq_t timebase_freq;
 299   unsigned long          num, den, cnt;
 300
 301   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 302   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 303
 304   cnt = 2;
 305   while (cnt <= den) {
 306     if ((num % cnt) || (den % cnt)) {
 307       cnt++;
 308       continue;
 309     }
 310
 311     num /= cnt;
 312     den /= cnt;
 313   }
 314
 315   timebase_freq.timebase_num = num;
 316   timebase_freq.timebase_den = den;
 317
 318   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 319 }
 320
 321 /*
 322  * map the framebuffer into kernel vm and return the (virtual)
 323  * address.
 324  */
 325 static vm_offset_t
 326 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 327                 int     length)    /* num bytes to map */
 328 {
 329     vm_offset_t vmaddr;
 330
 331         if (physaddr != (caddr_t)trunc_page(physaddr))
 332         panic("Framebuffer not on page boundary");
 333
 334         vmaddr = io_map((vm_offset_t)physaddr, length);
 335         if (vmaddr == 0)
 336         panic("can't alloc VM for framebuffer");
 337
 338     return vmaddr;
 339 }
 340
 341 /*
 342  * The default (non-functional) PE_poll_input handler.
 343  */
 344 static int
 345 PE_stub_poll_input(unsigned int options, char * c)
 346 {
 347     *c = 0xff;
 348     return 1;  /* 0 for success, 1 for unsupported */
 349 }
 350
 351 /*
 352  * Called by the kernel debugger to poll for keyboard input.
 353  * Keyboard drivers may replace the default stub function
 354  * with their polled-mode input function.
 355  */
 356 int (*PE_poll_input)(unsigned int options, char * c)
 357         = PE_stub_poll_input;