6658905f |
1 | .extern CopyBootToRAM\r |
2 | \r |
3 | .text\r |
4 | .code 32\r |
5 | .align 0\r |
6 | \r |
7 | .global start\r |
8 | start:\r |
9 | b Reset\r |
10 | b UndefinedInstruction\r |
11 | b SoftwareInterrupt\r |
12 | b PrefetchAbort\r |
13 | b DataAbort\r |
14 | b Reserved\r |
15 | b Irq\r |
16 | b Fiq\r |
17 | \r |
18 | Reset:\r |
19 | ldr sp, = 0x0020FFF8 @ initialize stack pointer to top of RAM\r |
20 | bl CopyBootToRAM @ copy bootloader to RAM (in case the\r |
21 | @ user re-flashes the bootloader)\r |
22 | ldr r3, = 0x00200000 @ start address of RAM bootloader\r |
23 | bx r3 @ jump to it\r |
24 | \r |
25 | Fiq:\r |
26 | b Fiq\r |
27 | UndefinedInstruction:\r |
28 | b UndefinedInstruction\r |
29 | SoftwareInterrupt:\r |
30 | b SoftwareInterrupt\r |
31 | PrefetchAbort:\r |
32 | b PrefetchAbort\r |
33 | DataAbort:\r |
34 | b DataAbort\r |
35 | Reserved:\r |
36 | b Reserved\r |
37 | Irq:\r |
38 | b Irq\r |