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| author | Chris Dearman <chris@mips.com> | 2007-07-06 17:11:20 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 17:33:04 +0100 |
| commit | ecd27b92fbb41f779d857632a69bd45dbaf0f915 (patch) | |
| tree | b8e1836e7fba7c16380f5bef087728b63f1edc7e /include | |
| parent | 83fd38cabc982db041d3586a15734713f45caa31 (diff) | |
| download | linux-ecd27b92fbb41f779d857632a69bd45dbaf0f915.tar.bz2 | |
[MIPS] Early check for SMTC kernel on non-MT processor
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/mach-mips/kernel-entry-init.h | 52 |
1 files changed, 52 insertions, 0 deletions
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 */ |