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ARM: 6292/1: coresight: add ETM management registers

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Add notion of ETM OS lock, save and restore registers.

Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Alexander Shishkin 2010-08-04 11:25:20 +01:00 committed by Russell King
parent 686ff22812
commit 9e354ea8e0
2 changed files with 7 additions and 3 deletions
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8
arch/arm/include/asm/hardware/coresight.h
View file

@ -48,8 +48,6 @@ struct tracectx {
/* CoreSight Component Registers */
#define CSCR_CLASS 0xff4
#define CSCR_PRSR 0x314
#define UNLOCK_MAGIC 0xc5acce55
/* ETM control register, "ETM Architecture", 3.3.1 */
@ -132,6 +130,12 @@ struct tracectx {
ETMCTRL_BRANCH_OUTPUT | \
ETMCTRL_DO_CONTEXTID)
/* ETM management registers, "ETM Architecture", 3.5.24 */
#define ETMMR_OSLAR 0x300
#define ETMMR_OSLSR 0x304
#define ETMMR_OSSRR 0x308
#define ETMMR_PDSR 0x314
/* ETB registers, "CoreSight Components TRM", 9.3 */
#define ETBR_DEPTH 0x04
#define ETBR_STATUS 0x0c

2
arch/arm/kernel/etm.c
View file

@ -543,7 +543,7 @@ static int __init etm_probe(struct amba_device *dev, struct amba_id *id)
t->etm_portsz = 1;
etm_unlock(t);
ret = etm_readl(t, CSCR_PRSR);
ret = etm_readl(t, ETMMR_PDSR);
t->ncmppairs = etm_readl(t, ETMR_CONFCODE) & 0xf;
etm_writel(t, 0x440, ETMR_CTRL);