arm-cci: Add CCI-500 PMU support

CCI-500 provides 8 event counters which can count any of the
supported events independently. The PMU event id is a 9-bit
value made of two parts.
	bits [8:5] - Source port
			0x0-0x6 Slave Ports
			0x8-0xD Master Ports
			0xf     Global Events to CCI
			0x7,0xe Reserved
	bits [0:4] - Event code (specific to each type of port)

The generic CCI-500 controlling interface remains the same with CCI-400.
However there are some differences in the PMU event counters.
 - No cycle counter
 - Upto 8 counters(4 in CCI-400)
 - Each counter area is 64K(4K in CCI400)
 - The counter0 starts at offset 0x10000 from the base of CCI

Cc: Punit Agrawal <punit.agrawal@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index a857936beac8..1a82f3a17681 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -34,6 +34,20 @@ config ARM_CCI400_PORT_CTRL
 	  Low level power management driver for CCI400 cache coherent
 	  interconnect for ARM platforms.
 
+config ARM_CCI500_PMU
+	bool "ARM CCI500 PMU support"
+	default y
+	depends on (ARM && CPU_V7) || ARM64
+	depends on PERF_EVENTS
+	select ARM_CCI_PMU
+	help
+	  Support for PMU events monitoring on the ARM CCI-500 cache coherent
+	  interconnect. CCI-500 provides 8 independent event counters, which
+	  can count events pertaining to the slave/master interfaces as well
+	  as the internal events to the CCI.
+
+	  If unsure, say Y
+
 config ARM_CCN
 	bool "ARM CCN driver support"
 	depends on ARM || ARM64