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Commit 4850f699 authored by Shashank Mittal's avatar Shashank Mittal
Browse files

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: default avatarShashank Mittal <mittals@codeaurora.org>
parent b7ca2f4c

drivers/hwtracing/coresight/coresight-priv.h

+22 −1
Original line number Diff line number Diff line 
/* 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);