root/loader/ixus220_elph300hs/main.c

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DEFINITIONS

This source file includes following definitions.
  1. my_restart

   1 #include "../generic/check_compat.c"
   2 
   3 // static void __attribute__((noreturn)) shutdown();
   4 // static void __attribute__((noreturn)) panic(int cnt);
   5 
   6 extern long *blob_chdk_core;
   7 // extern long *blob_copy_and_reset;
   8 extern long blob_chdk_core_size;
   9 // extern long blob_copy_and_reset_size;
  10 
  11 
  12 
  13 void __attribute__((noreturn)) my_restart()
  14 {
  15 
  16         {
  17                                 // char *dst = dst_void;
  18                                 // const char *src = src_void;
  19                                 long *dst = (long*)MEMISOSTART;
  20                                 const long *src = blob_chdk_core;
  21                                 long length = (blob_chdk_core_size + 3) >> 2;
  22 
  23   core_copy(src, dst, length);
  24 
  25         }
  26         
  27         // DEBUG: jump to regular firmware-boot (causing a boot loop)
  28         //dst_void = (void*) 0xFF810000;
  29 
  30         //IXUS220HS found at FF83D8F0
  31         asm volatile (
  32                  "LDR     R1, =0xC0200000\n"
  33                  "MVN     R0, #0\n"
  34                  "STR     R0, [R1,#0x10C]\n"
  35                  "STR     R0, [R1,#0xC]\n"
  36                  "STR     R0, [R1,#0x1C]\n"
  37                  "STR     R0, [R1,#0x2C]\n"
  38                  "STR     R0, [R1,#0x3C]\n"
  39                  "STR     R0, [R1,#0x4C]\n"
  40                  "STR     R0, [R1,#0x5C]\n"
  41                  "STR     R0, [R1,#0x6C]\n"
  42                  "STR     R0, [R1,#0x7C]\n"
  43                  "STR     R0, [R1,#0x8C]\n"
  44                  "STR     R0, [R1,#0x9C]\n"
  45                  "STR     R0, [R1,#0xAC]\n"
  46                  "STR     R0, [R1,#0xBC]\n"
  47                  "STR     R0, [R1,#0xCC]\n"
  48                  "STR     R0, [R1,#0xDC]\n"
  49                  "STR     R0, [R1,#0xEC]\n"
  50                  "CMP     R4, #7\n"
  51                  "STR     R0, [R1,#0xFC]\n"
  52                  //"LDMEQFD SP!, {R4,PC}\n"
  53                  "MOV     R0, #0x78\n"
  54                  "MCR     p15, 0, R0,c1,c0\n"
  55                  "MOV     R0, #0\n"
  56                  "MCR     p15, 0, R0,c7,c10, 4\n"
  57                  "MCR     p15, 0, R0,c7,c5\n"
  58                  "MCR     p15, 0, R0,c7,c6\n"
  59                  "MOV     R0, #0x80000006\n"
  60                  "MCR     p15, 0, R0,c9,c1\n"
  61                  "MCR     p15, 0, R0,c9,c1, 1\n"
  62                  "MRC     p15, 0, R0,c1,c0\n"
  63                  "ORR     R0, R0, #0x50000\n"
  64                  "MCR     p15, 0, R0,c1,c0\n"
  65                  "LDR     R0, =0x12345678\n"
  66                  "MOV     R1, #0x80000000\n"
  67                  "STR     R0, [R1,#0xFFC]\n"
  68                                  //"LDR     R0, =0xFF810000\n"  //original jump-vector
  69                                  "MOV     R0, %0\n"                     //new jump-vector
  70                  "LDMFD   SP!, {R4,LR}\n"
  71                  "BX      R0\n"
  72                                  : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4"
  73                 );
  74         while(1);
  75 
  76 }
  77 
  78 // #define LED_PR 0xC0220130   // -> ASM1989 08.24.2010 found at  FF91E080  in sx200 was FF8E73D0
  79 
  80 
  81 // static void __attribute__((noreturn)) shutdown()
  82 // {
  83 // 
  84 //     asm(
  85 //          "MRS     R1, CPSR\n"
  86 //          "AND     R0, R1, #0x80\n"
  87 //          "ORR     R1, R1, #0x80\n"
  88 //          "MSR     CPSR_cf, R1\n"
  89 //          :::"r1","r0");
  90 // 
  91 //     *p = 0x44;  // led off.
  92 // 
  93 //     while(1);
  94 // }
  95 // 
  96 // 
  97 // static void __attribute__((noreturn)) panic(int cnt)
  98 // {
  99 //      volatile long *p=(void*)LED_PR;
 100 //      int i;
 101 // 
 102 //      for(;cnt>0;cnt--){
 103 //              p[0]=0x46;
 104 // 
 105 //              for(i=0;i<0x200000;i++){
 106 //                      asm ("nop\n");
 107 //                      asm ("nop\n");
 108 //              }
 109 //              p[0]=0x44;
 110 //              for(i=0;i<0x200000;i++){
 111 //                      asm ("nop\n");
 112 //                      asm ("nop\n");
 113 //              }
 114 //      }
 115 //      shutdown();
 116 // }

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