2 BootMii - a Free Software replacement for the Nintendo/BroadOn bootloader.
5 Copyright (C) 2008 Segher Boessenkool <segher@kernel.crashing.org>
6 Copyright (C) 2009 Bernhard Urban <lewurm@gmx.net>
7 Copyright (C) 2009 Sebastian Falbesoner <sebastian.falbesoner@gmail.com>
9 # This code is licensed to you under the terms of the GNU GPL, version 2;
10 # see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
13 #include "bootmii_ppc.h"
17 #include "hollywood.h"
19 extern char exception_2200_start, exception_2200_end;
21 void exception_handler(int exception)
23 u32 cookie = irq_kill();
24 // check if the exception was actually an external interrupt
25 if (exception == 0x500) {
29 // check if exception happened due to the decrementer
30 else if (exception == 0x900) {
31 //printf("\nDecrementer exception occured - who cares?\n");
38 printf("\nException %04X occurred!\n", exception);
40 x = (u32 *)0x80002000;
42 printf("\n R0..R7 R8..R15 R16..R23 R24..R31\n");
43 for (i = 0; i < 8; i++) {
44 printf("%08x %08x %08x %08x\n", x[0], x[8], x[16], x[24]);
47 x = (u32 *)0x80002080;
49 printf("\n CR/XER LR/CTR SRR0/SRR1 DAR/DSISR\n");
50 for (i = 0; i < 2; i++) {
51 printf("%08x %08x %08x %08x\n", x[0], x[2], x[4], x[6]);
63 void exception_init(void)
68 for (vector = 0x100; vector < 0x2000; vector += 0x10) {
69 u32 *insn = (u32 *)(0x80000000 + vector);
71 insn[0] = 0xbc002000; // stmw 0,0x2000(0)
72 insn[1] = 0x38600000 | (u32)vector; // li 3,vector
73 insn[2] = 0x48002202; // ba 0x2200
76 sync_before_exec((void *)0x80000100, 0x1f00);
78 len_2200 = &exception_2200_end - &exception_2200_start;
79 memcpy((void *)0x80002200, &exception_2200_start, len_2200);
80 sync_before_exec((void *)0x80002200, len_2200);