diff options
| -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); |