root/loader/a3400/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_chdk_core_size;
   8 
   9 void __attribute__((noreturn)) my_restart()
  10 {
  11         {
  12                 long *dst = (long*)MEMISOSTART;
  13                 const long *src = blob_chdk_core;
  14                 long length = (blob_chdk_core_size + 3) >> 2;
  15 
  16   core_copy(src, dst, length);
  17 
  18 }
  19         
  20         // DEBUG: jump to regular firmware-boot (causing a boot loop)
  21         //dst_void = (void*) 0xFF810000;
  22 
  23 //** a3400_1.01a  @ 0xFF835AD0 
  24     asm volatile (
  25       "LDR     R1, =0xC0200000 \n"
  26       "MVN     R0, #0 \n"
  27       "STR     R0, [R1, #0x10C] \n"
  28       "STR     R0, [R1, #0xC] \n"
  29       "STR     R0, [R1, #0x1C] \n"
  30       "STR     R0, [R1, #0x2C] \n"
  31       "STR     R0, [R1, #0x3C] \n"
  32       "STR     R0, [R1, #0x4C] \n"
  33       "STR     R0, [R1, #0x5C] \n"
  34       "STR     R0, [R1, #0x6C] \n"
  35       "STR     R0, [R1, #0x7C] \n"
  36       "STR     R0, [R1, #0x8C] \n"
  37       "STR     R0, [R1, #0x9C] \n"
  38       "STR     R0, [R1, #0xAC] \n"
  39       "STR     R0, [R1, #0xBC] \n"
  40       "STR     R0, [R1, #0xCC] \n"
  41       "STR     R0, [R1, #0xDC] \n"
  42       "STR     R0, [R1, #0xEC] \n"
  43       "CMP     R4, #7 \n"
  44       "STR     R0, [R1, #0xFC] \n"
  45       //"LDMEQFD SP!, {R4,PC} \n"
  46       "MOV     R0, #0x78 \n"
  47       "MCR     p15, 0, R0, c1, c0 \n"
  48       "MOV     R0, #0 \n"
  49       "MCR     p15, 0, R0, c7, c10, 4 \n"
  50       "MCR     p15, 0, R0, c7, c5 \n"
  51       "MCR     p15, 0, R0, c7, c6 \n"
  52       "MOV     R0, #0x80000006 \n"
  53       "MCR     p15, 0, R0, c9, c1 \n"
  54       "MCR     p15, 0, R0, c9, c1, 1 \n"
  55       "MRC     p15, 0, R0, c1, c0 \n"
  56       "ORR     R0, R0, #0x50000 \n"
  57       "MCR     p15, 0, R0, c1, c0 \n"
  58       "LDR     R0, =0x12345678 \n"
  59       "MOV     R1, #0x80000000 \n"
  60       "STR     R0, [R1, #0xFFC] \n"
  61       //"LDR     R0, =0xFF810000 \n" //original jump-vector
  62       "MOV     R0, %0\n"              // new jump-vector
  63       "LDMFD   SP!, {R4,LR} \n"
  64       "BX      R0 \n"
  65       : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4"
  66                 );
  67 
  68         while(1);
  69 }
  70 
  71 //#define LED_PR 0x????????  //LED_GREEN
  72 
  73 //static void __attribute__((noreturn)) shutdown()
  74 //{
  75 //    volatile long *p = (void*)LED_PR;       // turned off later, so assumed to be power
  76 //
  77 //    asm(
  78 //         "MRS     R1, CPSR\n"
  79 //         "AND     R0, R1, #0x80\n"
  80 //         "ORR     R1, R1, #0x80\n"
  81 //         "MSR     CPSR_cf, R1\n"
  82 //         :::"r1","r0");
  83 //
  84 //    *p = 0x44;  // led off.
  85 //
  86 //    while(1);
  87 //}
  88 
  89 //static void __attribute__((noreturn)) panic(int cnt)
  90 //{
  91 //      volatile long *p=(void*)LED_PR;
  92 //      int i;
  93 //
  94 //      for(;cnt>0;cnt--){
  95 //              p[0]=0x46;
  96 //
  97 //              for(i=0;i<0x200000;i++){
  98 //                      asm ("nop\n");
  99 //                      asm ("nop\n");
 100 //              }
 101 //              p[0]=0x44;
 102 //              for(i=0;i<0x200000;i++){
 103 //                      asm ("nop\n");
 104 //                      asm ("nop\n");
 105 //              }
 106 //      }
 107 //      shutdown();
 108 //}

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