Linux Kernel  3.7.1
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flowctrl.c
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1 /*
2  * arch/arm/mach-tegra/flowctrl.c
3  *
4  * functions and macros to control the flowcontroller
5  *
6  * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms and conditions of the GNU General Public License,
10  * version 2, as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #include <linux/init.h>
22 #include <linux/kernel.h>
23 #include <linux/io.h>
24 
25 #include <mach/iomap.h>
26 
27 #include "flowctrl.h"
28 
32  FLOW_CTRL_HALT_CPU1_EVENTS + 8,
33  FLOW_CTRL_HALT_CPU1_EVENTS + 16,
34 };
35 
39  FLOW_CTRL_CPU1_CSR + 8,
40  FLOW_CTRL_CPU1_CSR + 16,
41 };
42 
43 static void flowctrl_update(u8 offset, u32 value)
44 {
46 
47  writel(value, addr);
48 
49  /* ensure the update has reached the flow controller */
50  wmb();
51  readl_relaxed(addr);
52 }
53 
55 {
56  return flowctrl_update(flowctrl_offset_cpu_csr[cpuid], value);
57 }
58 
60 {
61  return flowctrl_update(flowctrl_offset_halt_cpu[cpuid], value);
62 }