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
  47 /* private globals */
  48 PE_state_t PE_state;
  49
  50 /* Clock Frequency Info */
  51 clock_frequency_info_t gPEClockFrequencyInfo;
  52
  53 int PE_initialize_console( PE_Video * info, int op )
  54 {
  55     static int   last_console = -1;
  56     Boot_Video   bootInfo;
  57     Boot_Video * bInfo;
  58
  59     /*
  60      * Refuse changes from outside pexpert.
  61      * The video mode setup by the booter cannot be changed.
  62      */
  63     if ( info && (info == &PE_state.video) )
  64     {
  65         bootInfo.v_baseAddr      = PE_fb_vaddr;
  66         bootInfo.v_rowBytes      = info->v_rowBytes;
  67         bootInfo.v_width     = info->v_width;
  68         bootInfo.v_height    = info->v_height;
  69         bootInfo.v_depth     = info->v_depth;
  70         bootInfo.v_display   = PE_fb_mode;
  71         bInfo = &bootInfo;
  72     }
  73     else
  74         bInfo = 0;
  75
  76     switch ( op ) {
  77
  78         case kPEDisableScreen:
  79             initialize_screen((void *) bInfo, op);
  80 #ifdef FIXME
  81             last_console = switch_to_serial_console();
  82 #endif
  83             kprintf("kPEDisableScreen %d\n", last_console);
  84             break;
  85
  86         case kPEEnableScreen:
  87             initialize_screen((void *) bInfo, op);
  88             kprintf("kPEEnableScreen %d\n", last_console);
  89 #ifdef FIXME
  90             if( last_console != -1)
  91                 switch_to_old_console( last_console);
  92 #endif
  93             break;
  94
  95         default:
  96             initialize_screen((void *) bInfo, op);
  97             break;
  98     }
  99
 100     return 0;
 101 }
 102
 103 void PE_init_iokit(void)
 104 {
 105     long *          dt;
 106     void *          desc;
 107     unsigned char * data;
 108     unsigned char * clut;
 109
 110     dt = (long *) createdt(
 111                 fakePPCDeviceTree,
 112                 &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength);
 113
 114     /* Setup powermac_info and powermac_machine_info structures */
 115
 116     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 117     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 118
 119     /*
 120      * Setup the OpenFirmware Device Tree routines
 121      * so the console can be found and the right I/O space
 122      * can be used..
 123      */
 124     DTInit(dt);
 125
 126     /*
 127      * Initialize the spinning wheel (progress indicator).
 128      */
 129     clut = appleClut8;
 130     desc = &default_progress;
 131     data = default_progress_data;
 132
 133     vc_progress_initialize( desc, data, clut );
 134
 135     PE_initialize_console( (PE_Video *) 0, kPEAcquireScreen );
 136
 137     (void) StartIOKit( (void*)dt, (void*)PE_state.fakePPCBootArgs, 0, 0);
 138 }
 139
 140 void PE_init_platform(boolean_t vm_initialized, void * args)
 141 {
 142         if (PE_state.initialized == FALSE)
 143         {
 144         extern unsigned int halt_in_debugger, disableDebugOuput;
 145         unsigned int debug_arg;
 146
 147             PE_state.initialized        = TRUE;
 148             PE_state.bootArgs           = args;
 149             PE_state.video.v_baseAddr   = ((KERNBOOTSTRUCT *)args)->video.v_baseAddr;
 150             PE_state.video.v_rowBytes   = ((KERNBOOTSTRUCT *)args)->video.v_rowBytes;
 151             PE_state.video.v_height     = ((KERNBOOTSTRUCT *)args)->video.v_height;
 152             PE_state.video.v_width      = ((KERNBOOTSTRUCT *)args)->video.v_width;
 153             PE_state.video.v_depth      = ((KERNBOOTSTRUCT *)args)->video.v_depth;
 154         PE_state.video.v_display    = ((KERNBOOTSTRUCT *)args)->video.v_display;
 155         PE_fb_mode                  = ((KERNBOOTSTRUCT *)args)->graphicsMode;
 156             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 157             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 158
 159         if (PE_fb_mode == TEXT_MODE)
 160         {
 161             /* Force a text display if the booter did not setup a
 162              * VESA frame buffer.
 163              */
 164             PE_state.video.v_display = 0;
 165         }
 166
 167         /*
 168          * If DB_HALT flag is set, then cause a breakpoint to the debugger
 169          * immediately after the kernel debugger has been initialized.
 170          *
 171          * If DB_PRT flag is set, then enable debugger printf.
 172          */
 173         disableDebugOuput = TRUE; /* FIXME: override osfmk/i386/AT386/model_dep.c */
 174
 175         if (PE_parse_boot_arg("debug", &debug_arg)) {
 176             if (debug_arg & DB_HALT) halt_in_debugger = 1;
 177             if (debug_arg & DB_PRT)  disableDebugOuput = FALSE;
 178         }
 179         }
 180
 181         if (!vm_initialized)
 182         {
 183                 /* Hack! FIXME.. */
 184         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 185         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 186
 187         pe_identify_machine(args);
 188         }
 189         else
 190         {
 191           pe_init_debug();
 192
 193           PE_create_console();
 194         }
 195 }
 196
 197 void PE_create_console( void )
 198 {
 199     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 200     {
 201         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 202                                      (PE_fb_mode == TEXT_MODE)  ?
 203                       /* text mode */   PE_state.video.v_rowBytes :
 204                       /* grfx mode */   PE_state.video.v_rowBytes *
 205                                         PE_state.video.v_height);
 206     }
 207
 208         if (PE_state.video.v_display)
 209         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 210     else
 211         PE_initialize_console( &PE_state.video, kPETextMode );
 212 }
 213
 214 int PE_current_console( PE_Video * info )
 215 {
 216     *info = PE_state.video;
 217
 218     if ( PE_fb_mode == TEXT_MODE )
 219     {
 220         /*
 221          * FIXME: Prevent the IOBootFrameBuffer from starting up
 222          * when we are in Text mode.
 223          */
 224         info->v_baseAddr = 0;
 225     }
 226
 227     return (0);
 228 }
 229
 230 void PE_display_icon( unsigned int flags,
 231                       const char * name )
 232 {
 233 }
 234
 235 extern boolean_t PE_get_hotkey( unsigned char key )
 236 {
 237     return (FALSE);
 238 }
 239
 240 static timebase_callback_func gTimebaseCallback;
 241
 242 void PE_register_timebase_callback(timebase_callback_func callback)
 243 {
 244     gTimebaseCallback = callback;
 245
 246     PE_call_timebase_callback();
 247 }
 248
 249 void PE_call_timebase_callback(void)
 250 {
 251   struct timebase_freq_t timebase_freq;
 252   unsigned long          num, den, cnt;
 253
 254   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 255   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 256
 257   cnt = 2;
 258   while (cnt <= den) {
 259     if ((num % cnt) || (den % cnt)) {
 260       cnt++;
 261       continue;
 262     }
 263
 264     num /= cnt;
 265     den /= cnt;
 266   }
 267
 268   timebase_freq.timebase_num = num;
 269   timebase_freq.timebase_den = den;
 270
 271   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 272 }
 273
 274 /*
 275  * map the framebuffer into kernel vm and return the (virtual)
 276  * address.
 277  */
 278 static vm_offset_t
 279 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 280                 int     length)    /* num bytes to map */
 281 {
 282     vm_offset_t vmaddr;
 283
 284         if (physaddr != (caddr_t)trunc_page(physaddr))
 285         panic("Framebuffer not on page boundary");
 286
 287         vmaddr = io_map((vm_offset_t)physaddr, length);
 288         if (vmaddr == 0)
 289         panic("can't alloc VM for framebuffer");
 290
 291     return vmaddr;
 292 }