diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/smp_scu.c')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/kernel/smp_scu.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/smp_scu.c b/ANDROID_3.4.5/arch/arm/kernel/smp_scu.c deleted file mode 100644 index 8f5dd796..00000000 --- a/ANDROID_3.4.5/arch/arm/kernel/smp_scu.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * 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> -#include <asm/cacheflush.h> -#include <asm/cputype.h> - -#define SCU_CTRL 0x00 -#define SCU_CONFIG 0x04 -#define SCU_CPU_STATUS 0x08 -#define SCU_INVALIDATE 0x0c -#define SCU_FPGA_REVISION 0x10 - -#ifdef CONFIG_SMP -/* - * 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 scu_enable(void __iomem *scu_base) -{ - u32 scu_ctrl; - -#ifdef CONFIG_ARM_ERRATA_764369 - /* Cortex-A9 only */ - if ((read_cpuid(CPUID_ID) & 0xff0ffff0) == 0x410fc090) { - scu_ctrl = __raw_readl(scu_base + 0x30); - if (!(scu_ctrl & 1)) - __raw_writel(scu_ctrl | 0x1, scu_base + 0x30); - } -#endif - - scu_ctrl = __raw_readl(scu_base + SCU_CTRL); - /* already enabled? */ - if (scu_ctrl & 1) - return; - - scu_ctrl |= 1; - __raw_writel(scu_ctrl, scu_base + SCU_CTRL); - - /* - * Ensure that the data accessed by CPU0 before the SCU was - * initialised is visible to the other CPUs. - */ - flush_cache_all(); -} -#endif - -/* - * Set the executing CPUs power mode as defined. This will be in - * preparation for it executing a WFI instruction. - * - * This function must be called with preemption disabled, and as it - * has the side effect of disabling coherency, caches must have been - * flushed. Interrupts must also have been disabled. - */ -int scu_power_mode(void __iomem *scu_base, unsigned int mode) -{ - unsigned int val; - int cpu = smp_processor_id(); - - if (mode > 3 || mode == 1 || cpu > 3) - return -EINVAL; - - val = __raw_readb(scu_base + SCU_CPU_STATUS + cpu) & ~0x03; - val |= mode; - __raw_writeb(val, scu_base + SCU_CPU_STATUS + cpu); - - return 0; -} |