1
2 /*
3 * Operating system has died. Known functions will be killed
4 * after memmove.
5 *
6 * Make sure stack is not used.
7 */
8 // ERR99 ToDo: Fix LED
9 #define DP (void*)0xC0220138 // direct-print (blue) (G11 FW bottom)
10 #define LED_AF (void*)0xC0223030 //LED_AF G11
11 #define LED_ISO (void*)0xC022012C //LED_ISO G11
12 #define LED_PWR (void*)0xC0220130 //LED_PWR (G11 VF above)
13 #define LED_BLUE (void*)0xC0220128 //LED_BLUE (G11 EV)
14
15
16 #define DELAY 5000000
17
18 void __attribute__((noreturn)) copy_and_restart(void *dst_void, const void *src_void, long length) {
19
20 // volatile long *p = (void*)LED_BLUE; // turned off later, so assumed to be power
21 //volatile long *p2 = (void*)DP2; // turned off later, so assumed to be power
22
23 // int counter;
24
25 // DEBUG: blink led
26 //counter = DELAY; *p = 0x46; while (counter--) { asm("nop\n nop\n"); };
27 //counter = DELAY; *p = 0x44; while (counter--) { asm("nop\n nop\n"); };
28
29 {
30 char *dst = dst_void;
31 const char *src = src_void;
32
33 if (src < dst && dst < src + length)
34 {
35 /* Have to copy backwards */
36 src += length;
37 dst += length;
38 while (length--)
39 {
40 *--dst = *--src;
41 }
42 }
43 else
44 {
45 while (length--)
46 {
47 *dst++ = *src++;
48 }
49 }
50 }
51
52 //DEBUG: blink again
53 //counter = DELAY; *p = 0x46; while (counter--) { asm("nop\n nop\n"); };
54 //counter = DELAY; *p = 0x44; while (counter--) { asm("nop\n nop\n"); };
55
56 // DEBUG: jump to regular firmware-boot (causing a boot loop)
57 //dst_void = (void*) 0xFF810000;
58
59 // resetcode here:
60 asm volatile (
61 "MRS R0, CPSR\n"
62 "BIC R0, R0, #0x3F\n"
63 "ORR R0, R0, #0xD3\n"
64 "MSR CPSR, R0\n"
65 "LDR R1, =0xC0200000\n"
66 "MOV R0, #0xFFFFFFFF\n"
67 "STR R0, [R1,#0x10C]\n"
68 "STR R0, [R1,#0xC]\n"
69 "STR R0, [R1,#0x1C]\n"
70 "STR R0, [R1,#0x2C]\n"
71 "STR R0, [R1,#0x3C]\n"
72 "STR R0, [R1,#0x4C]\n"
73 "STR R0, [R1,#0x5C]\n"
74 "STR R0, [R1,#0x6C]\n"
75 "STR R0, [R1,#0x7C]\n"
76 "STR R0, [R1,#0x8C]\n"
77 "STR R0, [R1,#0x9C]\n"
78 "STR R0, [R1,#0xAC]\n"
79 "STR R0, [R1,#0xBC]\n"
80 "STR R0, [R1,#0xCC]\n"
81 "STR R0, [R1,#0xDC]\n"
82 "STR R0, [R1,#0xEC]\n"
83 "CMP R4, #7\n"
84 "STR R0, [R1,#0xFC]\n"
85 "LDMEQFD SP!, {R4,PC}\n"
86 "MOV R0, #0x78\n"
87 "MCR p15, 0, R0,c1,c0\n"
88 "MOV R0, #0\n"
89 "MCR p15, 0, R0,c7,c10, 4\n"
90 "MCR p15, 0, R0,c7,c5\n"
91 "MCR p15, 0, R0,c7,c6\n"
92 "MOV R0, #0x80000006\n"
93 "MCR p15, 0, R0,c9,c1\n"
94 "MCR p15, 0, R0,c9,c1, 1\n"
95 "MRC p15, 0, R0,c1,c0\n"
96 "ORR R0, R0, #0x50000\n"
97 "MCR p15, 0, R0,c1,c0\n"
98 "LDR R0, =0x12345678\n"
99 "MOV R1, #0x80000000\n"
100 "STR R0, [R1,#0xFFC]\n"
101 //"LDR R0, =0xFF810000\n" // original jump-vector
102 "MOV R0, %0\n" // new jump-vector
103 "LDMFD SP!, {R4,LR}\n"
104 "BX R0\n"
105 : : "r"(dst_void) : "memory","r0","r1","r2","r3","r4");
106 while(1);
107 }