diff options
| author | Shashank Mittal <mittals@codeaurora.org> | 2015-12-23 10:03:20 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:10:52 -0700 |
| commit | 898728e145447bda0ad995342b72002dca70a0bf (patch) | |
| tree | 9a7ad39d4ddc04d81393a59cfb0445e235f299e9 | |
| parent | f3ee02be6e5b6d6d987311ff56fb2b4cb8f8d70c (diff) | |
coresight: add support to read AUTHSTATUS
The status of the CoreSight fuses can be derived from the AUTHSTATUS
register. This patch add support to read AUTHSTATUS, which could be used
by Coresight device drivers to determine if that component is functional
in hardware.
Change-Id: I6b7ac2a3558c238ac5fca452ddfb6c88eef14b8b
Signed-off-by: Shashank Mittal <mittals@codeaurora.org>
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-priv.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 62fcd98cc7cf..5fd9900e2c0b 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. +/* Copyright (c) 2011-2012, 2016 The Linux Foundation. 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 and @@ -52,6 +52,27 @@ static inline void CS_UNLOCK(void __iomem *addr) } while (0); } +static inline bool coresight_authstatus_enabled(void __iomem *addr) +{ + int ret; + unsigned auth_val; + + if (!addr) + return false; + + auth_val = readl_relaxed(addr + CORESIGHT_AUTHSTATUS); + + if ((0x2 == BMVAL(auth_val, 0, 1)) || + (0x2 == BMVAL(auth_val, 2, 3)) || + (0x2 == BMVAL(auth_val, 4, 5)) || + (0x2 == BMVAL(auth_val, 6, 7))) + ret = false; + else + ret = true; + + return ret; +} + #ifdef CONFIG_CORESIGHT_SOURCE_ETM3X extern int etm_readl_cp14(u32 off, unsigned int *val); extern int etm_writel_cp14(u32 off, u32 val); |