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/*
* arch/arm/mach-tegra/flowctrl.c
*
* functions and macros to control the flowcontroller
*
* Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <mach/iomap.h>
#include "flowctrl.h"
u8 flowctrl_offset_halt_cpu[] = {
FLOW_CTRL_HALT_CPU0_EVENTS,
FLOW_CTRL_HALT_CPU1_EVENTS,
FLOW_CTRL_HALT_CPU1_EVENTS + 8,
FLOW_CTRL_HALT_CPU1_EVENTS + 16,
};
u8 flowctrl_offset_cpu_csr[] = {
FLOW_CTRL_CPU0_CSR,
FLOW_CTRL_CPU1_CSR,
FLOW_CTRL_CPU1_CSR + 8,
FLOW_CTRL_CPU1_CSR + 16,
};
static void flowctrl_update(u8 offset, u32 value)
{
void __iomem *addr = IO_ADDRESS(TEGRA_FLOW_CTRL_BASE) + offset;
writel(value, addr);
/* ensure the update has reached the flow controller */
wmb();
readl_relaxed(addr);
}
void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value)
{
return flowctrl_update(flowctrl_offset_halt_cpu[cpuid], value);
}
void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value)
{
return flowctrl_update(flowctrl_offset_cpu_csr[cpuid], value);
}
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