From ecd27b92fbb41f779d857632a69bd45dbaf0f915 Mon Sep 17 00:00:00 2001 From: Chris Dearman Date: Fri, 6 Jul 2007 17:11:20 +0100 Subject: [PATCH] [MIPS] Early check for SMTC kernel on non-MT processor Signed-off-by: Chris Dearman Signed-off-by: Ralf Baechle --- .../asm-mips/mach-mips/kernel-entry-init.h | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 include/asm-mips/mach-mips/kernel-entry-init.h diff --git a/include/asm-mips/mach-mips/kernel-entry-init.h b/include/asm-mips/mach-mips/kernel-entry-init.h new file mode 100644 index 000000000000..0b793e7bf67e --- /dev/null +++ b/include/asm-mips/mach-mips/kernel-entry-init.h @@ -0,0 +1,52 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Chris Dearman (chris@mips.com) + * Copyright (C) 2007 Mips Technologies, Inc. + */ +#ifndef __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H +#define __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H + + .macro kernel_entry_setup +#ifdef CONFIG_MIPS_MT_SMTC + mfc0 t0, CP0_CONFIG + bgez t0, 9f + mfc0 t0, CP0_CONFIG, 1 + bgez t0, 9f + mfc0 t0, CP0_CONFIG, 2 + bgez t0, 9f + mfc0 t0, CP0_CONFIG, 3 + and t0, 1<<2 + bnez t0, 0f +9: + /* Assume we came from YAMON... */ + PTR_LA v0, 0x9fc00534 /* YAMON print */ + lw v0, (v0) + move a0, zero + PTR_LA a1, nonmt_processor + jal v0 + + PTR_LA v0, 0x9fc00520 /* YAMON exit */ + lw v0, (v0) + li a0, 1 + jal v0 + +1: b 1b + + __INITDATA +nonmt_processor: + .asciz "SMTC kernel requires the MT ASE to run\n" + __FINIT +0: +#endif + .endm + +/* + * Do SMP slave processor setup necessary before we can safely execute C code. + */ + .macro smp_slave_setup + .endm + +#endif /* __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H */ -- 2.39.5