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lxdream.org :: lxdream/src/bootstrap.c
lxdream 0.9.1
released Jun 29
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filename src/bootstrap.c
changeset 25:fa2d21d57942
prev10:c898b37506e0
next26:ad258e3daaa5
author nkeynes
date Sat Dec 24 03:33:08 2005 +0000 (14 years ago)
permissions -rw-r--r--
last change Fixup include paths + typo for structure changes
view annotate diff log raw
     1 #include <stdlib.h>
     2 #include <stdint.h>
     3 #include <string.h>
     4 #include <stdio.h>
     5 #include <unistd.h>
     6 #include <fcntl.h>
     7 #include <errno.h>
     8 #include <assert.h>
     9 #include <sys/stat.h>
    10 #include <sys/mman.h>
    11 #include "ipbin.h"
    12 #include "gui/gui.h"
    14 static char *dc_peripherals[] = { "Uses WinCE", "Unknown (0x0000002)",
    15                                   "Unknown (0x0000004)", "Unknown (0x0000008)",
    16                                   "VGA Box", "Unknown (0x0000020)",
    17                                   "Unknown (0x0000040)", "Unknown (0x0000080)",
    18                                   "Other Expansions", "Puru Puru pack",
    19                                   "Mike", "Memory card",
    20                                   "Basic controller", "C button",
    21                                   "D button", "X button",
    22                                   "Y button", "Z button",
    23                                   "Expanded direction buttons",
    24                                   "Analog R trigger", "Analog L trigger",
    25                                   "Analog horizontal", "Analog vertical",
    26                                   "Expanded analog horizontal",
    27                                   "Expanded analog vertical",
    28                                   "Gun", "Keyboard", "Mouse" };
    30 static uint32_t compute_crc16( dc_bootstrap_head_t h )
    31 {
    32     /* Note: Algorithm taken from http://mc.pp.se/dc/ip0000.bin.html */
    33     uint32_t i, c, n = 0xffff;
    34     char *data = h->product_id;
    35     for (i = 0; i < 16; i++)
    36     {
    37         n ^= (data[i]<<8);
    38         for (c = 0; c < 8; c++)
    39             if (n & 0x8000)
    40                 n = (n << 1) ^ 4129;
    41             else
    42                 n = (n << 1);
    43     }
    44     return n & 0xffff;
    45 }
    47 void parse_ipbin( char *data )
    48 {
    49     struct dc_bootstrap_head *head;
    50     int i, got, periph, crc, hcrc;
    51     char *prot_symbols;
    52     char buf[512];
    54     /* Dump out the bootstrap metadata table */
    55     head = (struct dc_bootstrap_head *)data;
    56     prot_symbols = ((char *)data) + 0x3700;
    57     memcpy( buf, head->product_name, 128 );
    58     for( i=127; i>0 && buf[i] == ' '; i-- );
    59     buf[i] = '\0';
    60     periph = strtol( head->peripherals, NULL, 16 );
    61     INFO( "Bootstrap loaded, Name: %s   Author: %-16.16s",
    62           buf, head->vendor_id );
    63     sprintf( buf, "%4.4s", head->crc );
    64     crc = compute_crc16(head);
    65     hcrc = strtol( buf, NULL, 16 );
    66     emit( NULL, crc == hcrc ? EMIT_INFO : EMIT_WARN, MODULE_ID, 
    67           "  Header CRC:   %04X (Computed %04X)", hcrc, crc );
    68     INFO( "  Boot File:    %-16.16s", head->boot_file );
    69     INFO( "  Product ID:   %-10.10s   Product Ver: %-6.6s   Date: %-8.8s",
    70           head->product_id, head->product_ver, head->product_date );
    71     INFO( "  Disc ID:      %-11.11s  Regions:      %-8.8s   Peripherals: %07X",
    72           head->gdrom_id, head->regions, periph );
    73     strcpy( buf, "     Supports: " );
    74     got = 0;
    75     for( i=0; i<28; i++ ) {
    76         if( periph & (1<<i) ){
    77             if( got ) strcat( buf, ", " );
    78             strcat( buf, dc_peripherals[i] );
    79             got = 1;
    80         }
    81         if( i == 11 ) i = 23; /* Skip 8-23 */
    82     }
    83     INFO( buf, NULL );
    84     strcpy( buf, "     Requires: " );
    85     got = 0;
    86     for( i=12; i<24; i++ ) {
    87         if( periph & (1<<i) ) {
    88             if( got ) strcat( buf, ", " );
    89             strcat( buf, dc_peripherals[i] );
    90             got = 1;
    91         }
    92     }
    93     INFO( buf, NULL );
    94 #if 0
    95     INFO( "  Area protection symbols:", NULL );
    96     for( i=0; i<8; i++ )
    97         INFO( "    %d: %28.28s", i, &prot_symbols[(i*32)+4] );
    98 #endif
    99 }
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