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/debug.h>
  34
  35 #include "fakePPCStructs.h"
  36 #include "fakePPCDeviceTree.h"
  37
  38 /* extern references */
  39 extern void pe_identify_machine(void * args);
  40 extern void initialize_screen(void *, unsigned int);
  41
  42 /* Local references */
  43 static vm_offset_t mapframebuffer(caddr_t,int);
  44 static vm_offset_t PE_fb_vaddr = 0;
  45 static int         PE_fb_mode  = TEXT_MODE;
  46 static KERNBOOTSTRUCT * PE_kbp = 0;
  47
  48 /* private globals */
  49 PE_state_t  PE_state;
  50 dt_data     gMemoryMapNode;
  51 dt_data     gDriversProp;
  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 && (info == &PE_state.video) )
  67     {
  68         bootInfo.v_baseAddr      = PE_fb_vaddr;
  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         bootInfo.v_display   = PE_fb_mode;
  74         bInfo = &bootInfo;
  75     }
  76     else
  77         bInfo = 0;
  78
  79     switch ( op ) {
  80
  81         case kPEDisableScreen:
  82             initialize_screen((void *) bInfo, op);
  83 #ifdef FIXME
  84             last_console = switch_to_serial_console();
  85 #endif
  86             kprintf("kPEDisableScreen %d\n", last_console);
  87             break;
  88
  89         case kPEEnableScreen:
  90             initialize_screen((void *) bInfo, op);
  91             kprintf("kPEEnableScreen %d\n", last_console);
  92 #ifdef FIXME
  93             if( last_console != -1)
  94                 switch_to_old_console( last_console);
  95 #endif
  96             break;
  97
  98         default:
  99             initialize_screen((void *) bInfo, op);
 100             break;
 101     }
 102
 103     return 0;
 104 }
 105
 106 void PE_init_iokit(void)
 107 {
 108     long *          dt;
 109     void *          desc;
 110     unsigned char * data;
 111     unsigned char * clut;
 112
 113     typedef struct {
 114         char            name[32];
 115         unsigned long   length;
 116         unsigned long   value[2];
 117     } DriversPackageProp;
 118
 119     /*
 120      * Update the fake device tree with the driver information provided by
 121      * the booter.
 122      */
 123
 124         gDriversProp.length   = PE_kbp->numBootDrivers * sizeof(DriversPackageProp);
 125     gMemoryMapNode.length = 2 * sizeof(long);
 126
 127     dt = (long *) createdt( fakePPCDeviceTree,
 128                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 129
 130     if ( dt )
 131     {
 132         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 133         int i;
 134
 135         /* Copy driver info in kernBootStruct to fake device tree */
 136
 137         for ( i = 0; i < PE_kbp->numBootDrivers; i++, prop++ )
 138         {
 139             switch ( PE_kbp->driverConfig[i].type )
 140             {
 141                 case kBootDriverTypeKEXT:
 142                     sprintf(prop->name, "Driver-%lx", PE_kbp->driverConfig[i].address);
 143                     break;
 144
 145                  case kBootDriverTypeMKEXT:
 146                     sprintf(prop->name, "DriversPackage-%lx", PE_kbp->driverConfig[i].address);
 147                     break;
 148
 149                 default:
 150                     sprintf(prop->name, "DriverBogus-%lx", PE_kbp->driverConfig[i].address);
 151                     break;
 152             }
 153             prop->length   = sizeof(prop->value);
 154             prop->value[0] = PE_kbp->driverConfig[i].address;
 155             prop->value[1] = PE_kbp->driverConfig[i].size;
 156         }
 157
 158         *gMemoryMapNode.address = PE_kbp->numBootDrivers + 1;
 159     }
 160
 161     /* Setup powermac_info and powermac_machine_info structures */
 162
 163     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 164     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 165
 166     /*
 167      * Setup the OpenFirmware Device Tree routines
 168      * so the console can be found and the right I/O space
 169      * can be used..
 170      */
 171     DTInit(dt);
 172
 173     /*
 174      * Initialize the spinning wheel (progress indicator).
 175      */
 176     clut = appleClut8;
 177     desc = &default_progress;
 178     data = default_progress_data;
 179
 180     vc_progress_initialize( desc, data, clut );
 181
 182     PE_initialize_console( (PE_Video *) 0, kPEAcquireScreen );
 183
 184     (void) StartIOKit( (void*)dt, (void*)PE_state.fakePPCBootArgs, 0, 0);
 185 }
 186
 187 void PE_init_platform(boolean_t vm_initialized, void * args)
 188 {
 189         if (PE_state.initialized == FALSE)
 190         {
 191         extern unsigned int halt_in_debugger, disableDebugOuput;
 192         unsigned int        debug_arg;
 193
 194         PE_kbp = (KERNBOOTSTRUCT *) args;
 195
 196             PE_state.initialized        = TRUE;
 197             PE_state.bootArgs           = args;
 198             PE_state.video.v_baseAddr   = PE_kbp->video.v_baseAddr;
 199             PE_state.video.v_rowBytes   = PE_kbp->video.v_rowBytes;
 200             PE_state.video.v_height     = PE_kbp->video.v_height;
 201             PE_state.video.v_width      = PE_kbp->video.v_width;
 202             PE_state.video.v_depth      = PE_kbp->video.v_depth;
 203         PE_state.video.v_display    = PE_kbp->video.v_display;
 204         PE_fb_mode                  = PE_kbp->graphicsMode;
 205             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 206             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 207
 208         if (PE_fb_mode == TEXT_MODE)
 209         {
 210             /* Force a text display if the booter did not setup a
 211              * VESA frame buffer.
 212              */
 213             PE_state.video.v_display = 0;
 214         }
 215
 216         /*
 217          * If DB_HALT flag is set, then cause a breakpoint to the debugger
 218          * immediately after the kernel debugger has been initialized.
 219          *
 220          * If DB_PRT flag is set, then enable debugger printf.
 221          */
 222         disableDebugOuput = TRUE; /* FIXME: override osfmk/i386/AT386/model_dep.c */
 223
 224         if (PE_parse_boot_arg("debug", &debug_arg)) {
 225             if (debug_arg & DB_HALT) halt_in_debugger = 1;
 226             if (debug_arg & DB_PRT)  disableDebugOuput = FALSE;
 227         }
 228     }
 229
 230         if (!vm_initialized)
 231         {
 232                 /* Hack! FIXME.. */
 233         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 234         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 235
 236         pe_identify_machine(args);
 237         }
 238         else
 239         {
 240         pe_init_debug();
 241
 242         PE_create_console();
 243         }
 244 }
 245
 246 void PE_create_console( void )
 247 {
 248     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 249     {
 250         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 251                                      (PE_fb_mode == TEXT_MODE)  ?
 252                       /* text mode */   PE_state.video.v_rowBytes :
 253                       /* grfx mode */   PE_state.video.v_rowBytes *
 254                                         PE_state.video.v_height);
 255     }
 256
 257         if (PE_state.video.v_display)
 258         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 259     else
 260         PE_initialize_console( &PE_state.video, kPETextMode );
 261 }
 262
 263 int PE_current_console( PE_Video * info )
 264 {
 265     *info = PE_state.video;
 266
 267     if ( PE_fb_mode == TEXT_MODE )
 268     {
 269         /*
 270          * FIXME: Prevent the IOBootFrameBuffer from starting up
 271          * when we are in Text mode.
 272          */
 273         info->v_baseAddr = 0;
 274
 275         /*
 276          * Scale the size of the text screen from characters
 277          * to pixels.
 278          */
 279         info->v_width  *= 8;   // CHARWIDTH
 280         info->v_height *= 16;  // CHARHEIGHT
 281     }
 282
 283     return (0);
 284 }
 285
 286 void PE_display_icon( unsigned int flags,
 287                       const char * name )
 288 {
 289 }
 290
 291 extern boolean_t PE_get_hotkey( unsigned char key )
 292 {
 293     return (FALSE);
 294 }
 295
 296 static timebase_callback_func gTimebaseCallback;
 297
 298 void PE_register_timebase_callback(timebase_callback_func callback)
 299 {
 300     gTimebaseCallback = callback;
 301
 302     PE_call_timebase_callback();
 303 }
 304
 305 void PE_call_timebase_callback(void)
 306 {
 307   struct timebase_freq_t timebase_freq;
 308   unsigned long          num, den, cnt;
 309
 310   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 311   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 312
 313   cnt = 2;
 314   while (cnt <= den) {
 315     if ((num % cnt) || (den % cnt)) {
 316       cnt++;
 317       continue;
 318     }
 319
 320     num /= cnt;
 321     den /= cnt;
 322   }
 323
 324   timebase_freq.timebase_num = num;
 325   timebase_freq.timebase_den = den;
 326
 327   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 328 }
 329
 330 /*
 331  * map the framebuffer into kernel vm and return the (virtual)
 332  * address.
 333  */
 334 static vm_offset_t
 335 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 336                 int     length)    /* num bytes to map */
 337 {
 338     vm_offset_t vmaddr;
 339
 340         if (physaddr != (caddr_t)trunc_page(physaddr))
 341         panic("Framebuffer not on page boundary");
 342
 343         vmaddr = io_map((vm_offset_t)physaddr, length);
 344         if (vmaddr == 0)
 345         panic("can't alloc VM for framebuffer");
 346
 347     return vmaddr;
 348 }
 349
 350 /*
 351  * The default (non-functional) PE_poll_input handler.
 352  */
 353 static int
 354 PE_stub_poll_input(unsigned int options, char * c)
 355 {
 356     *c = 0xff;
 357     return 1;  /* 0 for success, 1 for unsupported */
 358 }
 359
 360 /*
 361  * Called by the kernel debugger to poll for keyboard input.
 362  * Keyboard drivers may replace the default stub function
 363  * with their polled-mode input function.
 364  */
 365 int (*PE_poll_input)(unsigned int options, char * c)
 366         = PE_stub_poll_input;