miniface/exception_2200.S at master · team-orangeBlue/miniface · GitHub

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/*
	BootMii - a Free Software replacement for the Nintendo/BroadOn bootloader.
	Requires mini.

Copyright (C) 2008		Segher Boessenkool <segher@kernel.crashing.org>

# This code is licensed to you under the terms of the GNU GPL, version 2;
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/

.globl exception_2200_start, exception_2200_end

exception_2200_start:
	# store all interesting regs
	mfcr 0 ;  stw 0,0x2080(0)
	mfxer 0 ; stw 0,0x2084(0)
	mflr 0 ;  stw 0,0x2088(0)
	mfctr 0 ; stw 0,0x208c(0)
	mfsrr0 0 ;  stw 0,0x2090(0)
	mfsrr1 0 ;  stw 0,0x2094(0)
	mfdar 0 ;   stw 0,0x2098(0)
	mfdsisr 0 ; stw 0,0x209c(0)

	# switch on FP, DR, IR
	mfmsr 0 ; ori 0,0,0x2030 ; mtsrr1 0

	# go to C handler
	lis 0,exception_handler@h ; ori 0,0,exception_handler@l ; mtsrr0 0
	rfi
exception_2200_end: