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
  51 /* private globals */
  52 PE_state_t  PE_state;
  53 dt_data     gMemoryMapNode;
  54 dt_data     gDriversProp;
  55
  56 /* Clock Frequency Info */
  57 clock_frequency_info_t gPEClockFrequencyInfo;
  58
  59 int PE_initialize_console( PE_Video * info, int op )
  60 {
  61     static int   last_console = -1;
  62     Boot_Video   bootInfo;
  63     Boot_Video * bInfo;
  64
  65     /*
  66      * Refuse changes from outside pexpert.
  67      * The video mode setup by the booter cannot be changed.
  68      */
  69     if ( info && (info == &PE_state.video) )
  70     {
  71         bootInfo.v_baseAddr      = PE_fb_vaddr;
  72         bootInfo.v_rowBytes      = info->v_rowBytes;
  73         bootInfo.v_width     = info->v_width;
  74         bootInfo.v_height    = info->v_height;
  75         bootInfo.v_depth     = info->v_depth;
  76         bootInfo.v_display   = PE_fb_mode;
  77         bInfo = &bootInfo;
  78     }
  79     else
  80         bInfo = 0;
  81
  82     switch ( op ) {
  83
  84         case kPEDisableScreen:
  85             initialize_screen((void *) bInfo, op);
  86 #ifdef FIXME
  87             last_console = switch_to_serial_console();
  88 #endif
  89             kprintf("kPEDisableScreen %d\n", last_console);
  90             break;
  91
  92         case kPEEnableScreen:
  93             initialize_screen((void *) bInfo, op);
  94             kprintf("kPEEnableScreen %d\n", last_console);
  95 #ifdef FIXME
  96             if( last_console != -1)
  97                 switch_to_old_console( last_console);
  98 #endif
  99             break;
 100
 101         default:
 102             initialize_screen((void *) bInfo, op);
 103             break;
 104     }
 105
 106     return 0;
 107 }
 108
 109 void PE_init_iokit(void)
 110 {
 111     long * dt;
 112     int    i;
 113     KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
 114
 115     typedef struct {
 116         char            name[32];
 117         unsigned long   length;
 118         unsigned long   value[2];
 119     } DriversPackageProp;
 120
 121     PE_init_kprintf(TRUE);
 122     PE_init_printf(TRUE);
 123
 124     /*
 125      * Update the fake device tree with the driver information provided by
 126      * the booter.
 127      */
 128
 129     gDriversProp.length   = kap->numBootDrivers * sizeof(DriversPackageProp);
 130     gMemoryMapNode.length = 2 * sizeof(long);
 131
 132     dt = (long *) createdt( fakePPCDeviceTree,
 133                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 134
 135     if ( dt )
 136     {
 137         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 138
 139         /* Copy driver info in kernBootStruct to fake device tree */
 140
 141         for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
 142         {
 143             switch ( kap->driverConfig[i].type )
 144             {
 145                 case kBootDriverTypeKEXT:
 146                     sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
 147                     break;
 148
 149                  case kBootDriverTypeMKEXT:
 150                     sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
 151                     break;
 152
 153                 default:
 154                     sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
 155                     break;
 156             }
 157             prop->length   = sizeof(prop->value);
 158             prop->value[0] = kap->driverConfig[i].address;
 159             prop->value[1] = kap->driverConfig[i].size;
 160         }
 161
 162         *gMemoryMapNode.address = kap->numBootDrivers + 1;
 163     }
 164
 165     /* Setup powermac_info and powermac_machine_info structures */
 166
 167     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 168     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 169
 170     /*
 171      * Setup the OpenFirmware Device Tree routines
 172      * so the console can be found and the right I/O space
 173      * can be used..
 174      */
 175     DTInit(dt);
 176
 177     /*
 178      * Fetch the CLUT and the noroot image.
 179      */
 180     bcopy( (void *) bootClut, appleClut8, sizeof(appleClut8) );
 181
 182     default_noroot.width  = kFailedBootWidth;
 183     default_noroot.height = kFailedBootHeight;
 184     default_noroot.dx     = 0;
 185     default_noroot.dy     = kFailedBootOffset;
 186     default_noroot_data   = failedBootPict;
 187
 188     /*
 189      * Initialize the panic UI
 190      */
 191     panic_ui_initialize( (unsigned char *) appleClut8 );
 192
 193     /*
 194      * Initialize the spinning wheel (progress indicator).
 195      */
 196     vc_progress_initialize( &default_progress, default_progress_data,
 197                             (unsigned char *) appleClut8 );
 198
 199     (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
 200 }
 201
 202 void PE_init_platform(boolean_t vm_initialized, void * args)
 203 {
 204         if (PE_state.initialized == FALSE)
 205         {
 206             KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
 207
 208             PE_state.initialized        = TRUE;
 209             PE_state.bootArgs           = args;
 210             PE_state.video.v_baseAddr   = kap->video.v_baseAddr;
 211             PE_state.video.v_rowBytes   = kap->video.v_rowBytes;
 212             PE_state.video.v_height     = kap->video.v_height;
 213             PE_state.video.v_width      = kap->video.v_width;
 214             PE_state.video.v_depth      = kap->video.v_depth;
 215             PE_state.video.v_display    = kap->video.v_display;
 216             PE_fb_mode                  = kap->graphicsMode;
 217             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 218             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 219
 220         if (PE_fb_mode == TEXT_MODE)
 221         {
 222             /* Force a text display if the booter did not setup a
 223              * VESA frame buffer.
 224              */
 225             PE_state.video.v_display = 0;
 226         }
 227     }
 228
 229     if (!vm_initialized)
 230     {
 231                 /* Hack! FIXME.. */
 232         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 233         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 234
 235         pe_identify_machine(args);
 236     }
 237     else
 238     {
 239         pe_init_debug();
 240     }
 241 }
 242
 243 void PE_create_console( void )
 244 {
 245     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 246     {
 247         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 248                                      (PE_fb_mode == TEXT_MODE)  ?
 249                       /* text mode */   PE_state.video.v_rowBytes :
 250                       /* grfx mode */   PE_state.video.v_rowBytes *
 251                                         PE_state.video.v_height);
 252     }
 253
 254     if ( PE_state.video.v_display )
 255         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 256     else
 257         PE_initialize_console( &PE_state.video, kPETextMode );
 258 }
 259
 260 int PE_current_console( PE_Video * info )
 261 {
 262     *info = PE_state.video;
 263
 264     if ( PE_fb_mode == TEXT_MODE )
 265     {
 266         /*
 267          * FIXME: Prevent the IOBootFrameBuffer from starting up
 268          * when we are in Text mode.
 269          */
 270         info->v_baseAddr = 0;
 271
 272         /*
 273          * Scale the size of the text screen from characters
 274          * to pixels.
 275          */
 276         info->v_width  *= 8;   // CHARWIDTH
 277         info->v_height *= 16;  // CHARHEIGHT
 278     }
 279
 280     return (0);
 281 }
 282
 283 void PE_display_icon( unsigned int flags, const char * name )
 284 {
 285     if ( default_noroot_data )
 286         vc_display_icon( &default_noroot, default_noroot_data );
 287 }
 288
 289 extern boolean_t PE_get_hotkey( unsigned char key )
 290 {
 291     return (FALSE);
 292 }
 293
 294 static timebase_callback_func gTimebaseCallback;
 295
 296 void PE_register_timebase_callback(timebase_callback_func callback)
 297 {
 298     gTimebaseCallback = callback;
 299
 300     PE_call_timebase_callback();
 301 }
 302
 303 void PE_call_timebase_callback(void)
 304 {
 305   struct timebase_freq_t timebase_freq;
 306   unsigned long          num, den, cnt;
 307
 308   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 309   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 310
 311   cnt = 2;
 312   while (cnt <= den) {
 313     if ((num % cnt) || (den % cnt)) {
 314       cnt++;
 315       continue;
 316     }
 317
 318     num /= cnt;
 319     den /= cnt;
 320   }
 321
 322   timebase_freq.timebase_num = num;
 323   timebase_freq.timebase_den = den;
 324
 325   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 326 }
 327
 328 /*
 329  * map the framebuffer into kernel vm and return the (virtual)
 330  * address.
 331  */
 332 static vm_offset_t
 333 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 334                 int     length)    /* num bytes to map */
 335 {
 336     vm_offset_t vmaddr;
 337
 338         if (physaddr != (caddr_t)trunc_page(physaddr))
 339         panic("Framebuffer not on page boundary");
 340         vmaddr = io_map((vm_offset_t)physaddr, length);
 341         if (vmaddr == 0)
 342         panic("can't alloc VM for framebuffer");
 343
 344     return vmaddr;
 345 }
 346
 347 /*
 348  * The default (non-functional) PE_poll_input handler.
 349  */
 350 static int
 351 PE_stub_poll_input(unsigned int options, char * c)
 352 {
 353     *c = 0xff;
 354     return 1;  /* 0 for success, 1 for unsupported */
 355 }
 356
 357 /*
 358  * Called by the kernel debugger to poll for keyboard input.
 359  * Keyboard drivers may replace the default stub function
 360  * with their polled-mode input function.
 361  */
 362 int (*PE_poll_input)(unsigned int options, char * c)
 363         = PE_stub_poll_input;
 364
 365
 366