loader/g10/main.c

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This source file includes following definitions.
my_restart
shutdown
panic
   1 #include "../generic/check_compat.c"
   2 
   3 //G10 loader - main.c
   4 
   5 static void __attribute__((noreturn)) shutdown();
   6 static void __attribute__((noreturn)) panic(int cnt);
   7 
   8 extern long *blob_chdk_core;
   9 extern long *blob_copy_and_reset;
  10 extern long blob_chdk_core_size;
  11 extern long blob_copy_and_reset_size;
  12 
  13 #define LED_ISO  (void*) 0xC02200D0 // G10 ISO select dial LED
  14 #define LED_DP   (void*) 0xC02200D4 // G10 direct print button LED
  15 #define LED_ECL  (void*) 0xC02200D8 // G10 exposure compensation dial LED
  16 #define LED_PWR  (void*) 0xC02200DC // G10 power LED
  17 #define DELAY 5000000
  18 
  19 void __attribute__((noreturn)) my_restart()
  20 {
  21     volatile long *p1 = (void*)LED_DP;
  22     int counter;
  23     // DEBUG: blink led
  24     counter = DELAY; *p1 = 0x46;  while (counter--) { asm("nop\n nop\n"); };
  25     counter = DELAY; *p1 = 0x44;  while (counter--) { asm("nop\n nop\n"); };
  26 
  27     {
  28         long *dst = (long*)MEMISOSTART;
  29         const long *src = blob_chdk_core;
  30         long length = (blob_chdk_core_size + 3) >> 2;
  31 
  32   core_copy(src, dst, length);
  33 
  34     }
  35 
  36         //DEBUG: blink another
  37         //counter = DELAY; *p2 = 0x46;  while (counter--) { asm("nop\n nop\n"); };
  38         //counter = DELAY; *p2 = 0x44;  while (counter--) { asm("nop\n nop\n"); };
  39 
  40         // DEBUG: jump to regular firmware-boot (causing a boot loop)
  41         // dst_void = (void*) 0xFF810000;
  42 
  43         // resetcode here:
  44         asm volatile (
  45             "MRS     R0, CPSR\n"
  46             "BIC     R0, R0, #0x3F\n"
  47             "ORR     R0, R0, #0xD3\n"
  48             "MSR     CPSR, R0\n"
  49             "LDR     R1, =0xC0200000\n"
  50             "MOV    R0, #0xFFFFFFFF\n"
  51             "STR     R0, [R1,#0x10C]\n"
  52             "STR     R0, [R1,#0xC]\n"
  53             "STR     R0, [R1,#0x1C]\n"
  54             "STR     R0, [R1,#0x2C]\n"
  55             "STR     R0, [R1,#0x3C]\n"
  56             "STR     R0, [R1,#0x4C]\n"
  57             "STR     R0, [R1,#0x5C]\n"
  58             "STR     R0, [R1,#0x6C]\n"
  59             "STR     R0, [R1,#0x7C]\n"
  60             "STR     R0, [R1,#0x8C]\n"
  61             "STR     R0, [R1,#0x9C]\n"
  62             "STR     R0, [R1,#0xAC]\n"
  63             "STR     R0, [R1,#0xBC]\n"
  64             "STR     R0, [R1,#0xCC]\n"
  65             "STR     R0, [R1,#0xDC]\n"
  66             "STR     R0, [R1,#0xEC]\n"
  67             "CMP     R4, #7\n"
  68             "STR     R0, [R1,#0xFC]\n"
  69             "LDMEQFD SP!, {R4,PC}\n"
  70             "MOV     R0, #0x78\n"
  71             "MCR     p15, 0, R0,c1,c0\n"
  72             "MOV     R0, #0\n"
  73             "MCR     p15, 0, R0,c7,c10, 4\n"
  74             "MCR     p15, 0, R0,c7,c5\n"
  75             "MCR     p15, 0, R0,c7,c6\n"
  76             "MOV     R0, #0x80000006\n"
  77             "MCR     p15, 0, R0,c9,c1\n"
  78             "MCR     p15, 0, R0,c9,c1, 1\n"
  79             "MRC     p15, 0, R0,c1,c0\n"
  80             "ORR     R0, R0, #0x50000\n"
  81             "MCR     p15, 0, R0,c1,c0\n"
  82             "LDR     R0, =0x12345678\n"
  83             "MOV     R1, #0x80000000\n"
  84             "STR     R0, [R1,#0xFFC]\n"
  85            //"LDR     R0, =0xFF810000\n"   // original jump-vector
  86             "MOV     R0, %0\n"            // new jump-vector
  87             "LDMFD   SP!, {R4,LR}\n"
  88             "BX      R0\n"
  89             : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4");
  90         while(1);
  91 }
  92 
  93 
  94 static void __attribute__((noreturn)) shutdown()
  95 {
  96     volatile long *p = (void*)LED_PWR;       // turned off later, so assumed to be power
  97 
  98     asm(
  99          "MRS     R1, CPSR\n"
 100          "AND     R0, R1, #0x80\n"
 101          "ORR     R1, R1, #0x80\n"
 102          "MSR     CPSR_cf, R1\n"
 103          :::"r1","r0");
 104 
 105     *p = 0x44;  // led off.
 106 
 107     while(1);
 108 }
 109 
 110 
 111 static void __attribute__((noreturn)) panic(int cnt)
 112 {
 113     volatile long *p=(void*)LED_PWR;
 114     int i;
 115 
 116     for(;cnt>0;cnt--){
 117         p[0]=0x46;
 118 
 119         for(i=0;i<0x200000;i++){
 120             asm ("nop\n");
 121             asm ("nop\n");
 122         }
 123         p[0]=0x44;
 124         for(i=0;i<0x200000;i++){
 125             asm ("nop\n");
 126             asm ("nop\n");
 127         }
 128     }
 129     shutdown();
 130 }
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root/loader/g10/main.c

DEFINITIONS
