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 // DEBUG: blink led
16 /*
17 #define DP (void*)0xC02200CC // direct-print (blue)
18 #define DELAY 5000000
19
20 volatile long *p = (void*)DP; // turned off later, so assumed to be power
21 int counter;
22
23 counter = DELAY; *p = 0x46; while (counter--) { asm("nop\n nop\n"); };
24 counter = DELAY; *p = 0x44; while (counter--) { asm("nop\n nop\n"); };
25 */
26 {
27 // char *dst = dst_void;
28 // const char *src = src_void;
29 long *dst = (long*)MEMISOSTART;
30 const long *src = blob_chdk_core;
31 long length = (blob_chdk_core_size + 3) >> 2;
32
33 core_copy(src, dst, length);
34
35 }
36 //DEBUG: blink again
37 //counter = DELAY; *p = 0x46; while (counter--) { asm("nop\n nop\n"); };
38 //counter = DELAY; *p = 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, #0x40000006\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, #0x40000000\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
91 while(1);
92 }