https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 326ba5010a5429a5a528b268b36a5900d4ab0eba authored by Linus Torvalds on 28 August 2009, 00:59:04 UTC
Linux 2.6.31-rc8
Linux 2.6.31-rc8
Tip revision: 326ba50
smp_scu.c
/*
* 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>
#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);
/*
* Ensure that the data accessed by CPU0 before the SCU was
* initialised is visible to the other CPUs.
*/
flush_cache_all();
}