ARM Platforms: Update CNTFRQ register in CNTCTLBase frame
Currently TF-A doesn't initialise CNTFRQ register in CNTCTLBase
frame of the system timer. ARM ARM states that "The instance of
the register in the CNTCTLBase frame must be programmed with this
value as part of system initialization."
The psci_arch_setup() updates the CNTFRQ system register but
according to the ARM ARM, this instance of the register is
independent of the memory mapped instance. This is only an issue
for Normal world software which relies on the memory mapped
instance rather than the system register one.
This patch resolves the issue for ARM platforms.
The patch also solves a related issue on Juno, wherein
CNTBaseN.CNTFRQ can be written and does not reflect the value of
the register in CNTCTLBase frame. Hence this patch additionally
updates CNTFRQ register in the Non Secure frame of the CNTBaseN.
Fixes ARM-Software/tf-issues#593
Change-Id: I09cebb6633688b34d5b1bc349fbde4751025b350
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index e07156c..e3d0edb 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -258,6 +258,8 @@
#define ARM_SYS_CNTCTL_BASE 0x2a430000
#define ARM_SYS_CNTREAD_BASE 0x2a800000
#define ARM_SYS_TIMCTL_BASE 0x2a810000
+#define ARM_SYS_CNT_BASE_S 0x2a820000
+#define ARM_SYS_CNT_BASE_NS 0x2a830000
#define ARM_CONSOLE_BAUDRATE 115200