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/* * Copyright (C) 2001,2002,2003 Broadcom Corporation * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <linux/config.h> #include <linux/init.h> #include <asm/asm.h> #include <asm/regdef.h> #include <asm/mipsregs.h> #include <asm/stackframe.h> #include <asm/sibyte/board.h> .text .set noat .set mips4 __INIT /* Cache Error handler for SB1 */ LEAF(except_vec2_sb1) mfc0 k1, $26 # check if error was recoverable bltz k1, leave_cerr #ifdef CONFIG_SB1_PASS_1_WORKAROUNDS # look for signature of spurious CErr lui k0, 0x4000 bne k0, k1, 1f .word 0x401Bd801 # mfc0 k1, $27, 1 lui k0, 0xffe0 and k1, k0, k1 lui k0, 0x0200 beq k0, k1, leave_cerr 1: #endif j handle_vec2_sb1 leave_cerr: # clear/unlock the registers mtc0 zero, $26 mtc0 zero, $27 .word 0x4080d801 # mtc0 zero, $27, 1 .word 0x4080d803 # mtc0 zero, $27, 3 eret END(except_vec2_sb1) __FINIT LEAF(handle_vec2_sb1) mfc0 k0,CP0_CONFIG li k1,~CONF_CM_CMASK and k0,k0,k1 ori k0,k0,CONF_CM_UNCACHED mtc0 k0,CP0_CONFIG SSNOP SSNOP SSNOP SSNOP bnezl $0, 1f 1: mfc0 k0, CP0_STATUS sll k0, k0, 3 # check CU0 (kernel?) bltz k0, 2f GET_SAVED_SP move sp, k0 # want Kseg SP (so uncached) 2: j sb1_cache_error END(handle_vec2_sb1) |