root/loader/ixus120_sd940/main.c

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DEFINITIONS

This source file includes following definitions.
  1. my_restart
  2. shutdown
  3. panic

   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         long *dst = (long*)MEMISOSTART;
  17         const long *src = blob_chdk_core;
  18         long length = (blob_chdk_core_size + 3) >> 2;
  19 
  20   core_copy(src, dst, length);
  21 
  22     }
  23 
  24         asm volatile (
  25                  "MRS     R0, CPSR\n"
  26                  "BIC     R0, R0, #0x3F\n"
  27                  "ORR     R0, R0, #0xD3\n"
  28                  "MSR     CPSR, R0\n"
  29                  "LDR     R1, =0xC0200000\n"
  30                  "MVN     R0, #0 \n"
  31                  "STR     R0, [R1,#0x10C]\n"
  32                  "STR     R0, [R1,#0xC]\n"
  33                  "STR     R0, [R1,#0x1C]\n"
  34                  "STR     R0, [R1,#0x2C]\n"
  35                  "STR     R0, [R1,#0x3C]\n"
  36                  "STR     R0, [R1,#0x4C]\n"
  37                  "STR     R0, [R1,#0x5C]\n"
  38                  "STR     R0, [R1,#0x6C]\n"
  39                  "STR     R0, [R1,#0x7C]\n"
  40                  "STR     R0, [R1,#0x8C]\n"
  41                  "STR     R0, [R1,#0x9C]\n"
  42                  "STR     R0, [R1,#0xAC]\n"
  43                  "STR     R0, [R1,#0xBC]\n"
  44                  "STR     R0, [R1,#0xCC]\n"
  45                  "STR     R0, [R1,#0xDC]\n"
  46                  "STR     R0, [R1,#0xEC]\n"
  47                  "CMP     R4, #7\n"
  48                  "STR     R0, [R1,#0xFC]\n"
  49                  "LDMEQFD SP!, {R4,PC}\n"
  50                  "MOV     R0, #0x78\n"
  51                  "MCR     p15, 0, R0,c1,c0\n"
  52                  "MOV     R0, #0\n"
  53                  "MCR     p15, 0, R0,c7,c10, 4\n"
  54                  "MCR     p15, 0, R0,c7,c5\n"
  55                  "MCR     p15, 0, R0,c7,c6\n"
  56                  "MOV     R0, #0x80000006\n"
  57                  "MCR     p15, 0, R0,c9,c1\n"
  58                  "MCR     p15, 0, R0,c9,c1, 1\n"
  59                  "MRC     p15, 0, R0,c1,c0\n"
  60                  "ORR     R0, R0, #0x50000\n"
  61                  "MCR     p15, 0, R0,c1,c0\n"
  62                  "LDR     R0, =0x12345678\n"
  63                  "MOV     R1, #0x80000000\n"
  64                  "STR     R0, [R1,#0xFFC]\n"
  65               // "LDR     R0, =loc_FF810000\n"
  66                  "MOV     R0, %0\n"              // new jump-vector
  67                  "LDMFD   SP!, {R4,LR}\n"
  68                  "BX      R0\n"
  69                  : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4");
  70 
  71         while(1);
  72 }
  73 
  74 #define LED_GREEN  0xC0220130
  75 #define LED_ORANGE 0xC0220134
  76 #define LED_AF     0xC0223030
  77 
  78 static void __attribute__((noreturn)) shutdown()
  79 {
  80     volatile long *p = (void*)LED_ORANGE;       // turned off later, so assumed to be power
  81 
  82     asm(
  83          "MRS     R1, CPSR\n"
  84          "AND     R0, R1, #0x80\n"
  85          "ORR     R1, R1, #0x80\n"
  86          "MSR     CPSR_cf, R1\n"
  87          :::"r1","r0");
  88 
  89     *p = 0x44;  // led off.
  90 
  91     while(1);
  92 }
  93 
  94 
  95 static void __attribute__((noreturn)) panic(int cnt)
  96 {
  97     volatile long *p=(void*)LED_ORANGE;
  98     int i;
  99 
 100     for(;cnt>0;cnt--){
 101         p[0]=0x46;
 102 
 103         for(i=0;i<0x200000;i++){
 104             asm ("nop\n");
 105             asm ("nop\n");
 106         }
 107         p[0]=0x44;
 108         for(i=0;i<0x200000;i++){
 109             asm ("nop\n");
 110             asm ("nop\n");
 111         }
 112     }
 113     shutdown();
 114 }

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