FreeBSD/Linux Kernel Cross Reference
sys/pexpert/i386/pe_init.c

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * The contents of this file constitute Original Code as defined in and
      * are subject to the Apple Public Source License Version 1.1 (the
      * "License").  You may not use this file except in compliance with the
      * License.  Please obtain a copy of the License at
     * http://www.apple.com/publicsource and read it before using this file.
     * 
     * This Original Code and all software distributed under the License are
     * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
     * License for the specific language governing rights and limitations
     * under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * file: pe_init.c
     *    i386 platform expert initialization.
     */
    #include <sys/types.h>
    #include <mach/vm_param.h>
    #include <pexpert/protos.h>
    #include <pexpert/pexpert.h>
    #include <pexpert/boot.h>
    #include <pexpert/device_tree.h>
    #include <pexpert/pe_images.h>
    #include <kern/sched_prim.h>
    
    #include "fakePPCStructs.h"
    #include "fakePPCDeviceTree.h"
    #include "boot_images.h"
    
    /* extern references */
    extern void pe_identify_machine(void * args);
    extern void initialize_screen(void *, unsigned int);
    
    /* Local references */
    static int         PE_fb_mode  = TEXT_MODE;
    
    /* private globals */
    PE_state_t  PE_state;
    dt_data     gMemoryMapNode;
    dt_data     gDriversProp;
    dt_data     gRootpathProp;
    dt_data     gCompatibleProp;
    
    /* Clock Frequency Info */
    clock_frequency_info_t gPEClockFrequencyInfo;
    
    int PE_initialize_console( PE_Video * info, int op )
    {
        static int   last_console = -1;
        Boot_Video   bootInfo;
        Boot_Video * bInfo;
    
        /*
         * Refuse changes from outside pexpert.
         * The video mode setup by the booter cannot be changed.
         */
        if ( info )
        {
            bootInfo.v_baseAddr = info->v_baseAddr;
            bootInfo.v_rowBytes      = info->v_rowBytes;
            bootInfo.v_width     = info->v_width;
            bootInfo.v_height    = info->v_height;
            bootInfo.v_depth     = info->v_depth;
            bInfo = &bootInfo;
            if (info == &PE_state.video) {
                bootInfo.v_display  = PE_fb_mode;
            } else {
                bootInfo.v_display  = GRAPHICS_MODE;
            }
        }
        else
            bInfo = 0;
    
        switch ( op ) {
    
            case kPEDisableScreen:
                initialize_screen((void *) bInfo, op);
    #ifdef FIXME
                last_console = switch_to_serial_console();
    #endif
                kprintf("kPEDisableScreen %d\n", last_console);
                break;
    
            case kPEEnableScreen:
                initialize_screen((void *) bInfo, op);
                kprintf("kPEEnableScreen %d\n", last_console);
    #ifdef FIXME
                if( last_console != -1)
                    switch_to_old_console( last_console);
    #endif
               break;
           
           default:
               initialize_screen((void *) bInfo, op);
               break;
       }
   
       return 0;
   }
   
   void PE_init_iokit(void)
   {
       long * dt;
       int    i;
       KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
       enum { kMaxBootVar = 128 };
       char *rdValue, *platformValue;
           
       typedef struct {
           char            name[32];
           unsigned long   length;
           unsigned long   value[2];
       } DriversPackageProp;
   
       PE_init_kprintf(TRUE);
       PE_init_printf(TRUE);
   
       /*
        * Update the fake device tree with the driver information provided by
        * the booter.
        */
   
       gDriversProp.length   = kap->numBootDrivers * sizeof(DriversPackageProp);
       gMemoryMapNode.length = 2 * sizeof(long);
   
       rdValue = kalloc(kMaxBootVar);
       if ( PE_parse_boot_arg("rd", rdValue) ) {
           if (*rdValue == '*') {
               gRootpathProp.address = (rdValue + 1);
           } else {
               gRootpathProp.address = rdValue;
           }
           strcat(rdValue, ",");
       } else {
           gRootpathProp.address = rdValue;
           rdValue[0] = '\0';
       }
       strcat(rdValue, kap->bootFile);
       gRootpathProp.length = strlen(rdValue) + 1;
   
       platformValue = kalloc(kMaxBootVar);
       if ( ! PE_parse_boot_arg("platform", platformValue) ) {
           strcpy(platformValue, kDefaultPlatformName);
       }
       gCompatibleProp.address = platformValue;
       gCompatibleProp.length = strlen(platformValue) + 1;
   
       dt = (long *) createdt( fakePPCDeviceTree,
                     &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
   
       kfree(rdValue, kMaxBootVar);
       kfree(platformValue, kMaxBootVar);
   
   
       if ( dt )
       {
           DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
   
           /* Copy driver info in kernBootStruct to fake device tree */
   
           for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
           {
               switch ( kap->driverConfig[i].type )
               {
                   case kBootDriverTypeKEXT:
                       sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
                       break;
                   
                    case kBootDriverTypeMKEXT:
                       sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
                       break;
   
                   default:
                       sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
                       break;
               }
               prop->length   = sizeof(prop->value);
               prop->value[0] = kap->driverConfig[i].address;
               prop->value[1] = kap->driverConfig[i].size;
           }
   
           *((long *)gMemoryMapNode.address) = kap->numBootDrivers + 1;
       }
   
       /* Setup powermac_info and powermac_machine_info structures */
   
       ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
       ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData = (unsigned long) kalloc(0x2000);
   
       /* 
        * Setup the OpenFirmware Device Tree routines
        * so the console can be found and the right I/O space 
        * can be used..
        */
       DTInit(dt);
   
       /*
        * Fetch the CLUT and the noroot image.
        */
       bcopy( (void *) (uintptr_t) bootClut, (void *) appleClut8, sizeof(appleClut8) );
   
       default_noroot.width  = kFailedBootWidth;
       default_noroot.height = kFailedBootHeight;
       default_noroot.dx     = 0;
       default_noroot.dy     = kFailedBootOffset;
       default_noroot_data   = failedBootPict;
       
       /*
        * Initialize the panic UI
        */
       panic_ui_initialize( (unsigned char *) appleClut8 );
   
       /*
        * Initialize the spinning wheel (progress indicator).
        */
       vc_progress_initialize( &default_progress, default_progress_data,
                               (unsigned char *) appleClut8 );
   
       (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
   }
   
   void PE_init_platform(boolean_t vm_initialized, void * args)
   {
           if (PE_state.initialized == FALSE)
           {
               KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
   
               PE_state.initialized        = TRUE;
               PE_state.bootArgs           = args;
               PE_state.video.v_baseAddr   = kap->video.v_baseAddr;
               PE_state.video.v_rowBytes   = kap->video.v_rowBytes;
               PE_state.video.v_height     = kap->video.v_height;
               PE_state.video.v_width      = kap->video.v_width;
               PE_state.video.v_depth      = kap->video.v_depth;
               PE_state.video.v_display    = kap->video.v_display;
               PE_fb_mode                  = kap->graphicsMode;
               PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
               ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
   
           if (PE_fb_mode == TEXT_MODE)
           {
               /* Force a text display if the booter did not setup a
                * VESA frame buffer.
                */
               PE_state.video.v_display = 0;
           }
       }
   
       if (!vm_initialized)
       {
                   /* Hack! FIXME.. */ 
           outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
           outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
    
           pe_identify_machine(args);
       }
       else
       {
           pe_init_debug();
       }
   }
   
   void PE_create_console( void )
   {
       if ( PE_state.video.v_display )
           PE_initialize_console( &PE_state.video, kPEGraphicsMode );
       else
           PE_initialize_console( &PE_state.video, kPETextMode );
   }
   
   int PE_current_console( PE_Video * info )
   {
       *info = PE_state.video;
   
       if ( PE_fb_mode == TEXT_MODE )
       {
           /*
            * FIXME: Prevent the IOBootFrameBuffer from starting up
            * when we are in Text mode.
            */
           info->v_baseAddr = 0;
           
           /*
            * Scale the size of the text screen from characters
            * to pixels.
            */
           info->v_width  *= 8;   // CHARWIDTH
           info->v_height *= 16;  // CHARHEIGHT
       }
   
       return (0);
   }
   
   void PE_display_icon( __unused unsigned int flags, __unused const char * name )
   {
       if ( default_noroot_data )
           vc_display_icon( &default_noroot, default_noroot_data );
   }
   
   extern boolean_t PE_get_hotkey( __unused unsigned char key )
   {
       return (FALSE);
   }
   
   static timebase_callback_func gTimebaseCallback;
   
   void PE_register_timebase_callback(timebase_callback_func callback)
   {
       gTimebaseCallback = callback;
     
       PE_call_timebase_callback();
   }
   
   void PE_call_timebase_callback(void)
   {
     struct timebase_freq_t timebase_freq;
     unsigned long          num, den, cnt;
     
     num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
     den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
     
     cnt = 2;
     while (cnt <= den) {
       if ((num % cnt) || (den % cnt)) {
         cnt++;
         continue;
       }
       
       num /= cnt;
       den /= cnt;
     }
     
     timebase_freq.timebase_num = num;
     timebase_freq.timebase_den = den;
     
     if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
   }
   
   /*
    * The default (non-functional) PE_poll_input handler.
    */
   static int
   PE_stub_poll_input(__unused unsigned int options, char * c)
   {
       *c = 0xff;
       return 1;  /* 0 for success, 1 for unsupported */
   }
   
   /*
    * Called by the kernel debugger to poll for keyboard input.
    * Keyboard drivers may replace the default stub function
    * with their polled-mode input function.
    */
   int (*PE_poll_input)(unsigned int options, char * c)
           = PE_stub_poll_input;
   
   
   

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