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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-05-16 11:51:14 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-05-17 19:00:37 +0100 |
commit | a8cbcd92bd4bf893085eddf7f58e63ea98503d94 (patch) | |
tree | 7798cd1487362208793632f4ff0b4a6f579eb0ec /arch/arm/kernel/smp_scu.c | |
parent | 49613d4d9ae759193915823e67de546fca58c951 (diff) | |
download | kernel_samsung_smdk4412-a8cbcd92bd4bf893085eddf7f58e63ea98503d94.zip kernel_samsung_smdk4412-a8cbcd92bd4bf893085eddf7f58e63ea98503d94.tar.gz kernel_samsung_smdk4412-a8cbcd92bd4bf893085eddf7f58e63ea98503d94.tar.bz2 |
[ARM] smp: separate SCU support code from realview
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/smp_scu.c')
-rw-r--r-- | arch/arm/kernel/smp_scu.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp_scu.c b/arch/arm/kernel/smp_scu.c new file mode 100644 index 0000000..7f24ee9 --- /dev/null +++ b/arch/arm/kernel/smp_scu.c @@ -0,0 +1,41 @@ +/* + * linux/arch/arm/kernel/smp_scu.c + * + * Copyright (C) 2002 ARM Ltd. + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/init.h> +#include <linux/io.h> + +#include <asm/smp_scu.h> + +#define SCU_CTRL 0x00 +#define SCU_CONFIG 0x04 +#define SCU_CPU_STATUS 0x08 +#define SCU_INVALIDATE 0x0c +#define SCU_FPGA_REVISION 0x10 + +/* + * Get the number of CPU cores from the SCU configuration + */ +unsigned int __init scu_get_core_count(void __iomem *scu_base) +{ + unsigned int ncores = __raw_readl(scu_base + SCU_CONFIG); + return (ncores & 0x03) + 1; +} + +/* + * Enable the SCU + */ +void __init scu_enable(void __iomem *scu_base) +{ + u32 scu_ctrl; + + scu_ctrl = __raw_readl(scu_base + SCU_CTRL); + scu_ctrl |= 1; + __raw_writel(scu_ctrl, scu_base + SCU_CTRL); +} |