From a076789efe60ba9a9e22e47c278e03040812cde7 Mon Sep 17 00:00:00 2001
From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Date: Thu, 13 Jul 2017 19:01:09 +0530
Subject: [PATCH] arm64: zynqmp: Define a way to intialize TCM
TCM on ZynqMP needs to be intialized in a sequence
and this patch provides a global routine to perform
this as per requirement.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---
arch/arm/cpu/armv8/zynqmp/mp.c | 15 +++++++++++++++
arch/arm/include/asm/arch-zynqmp/sys_proto.h | 7 +++++++
2 files changed, 22 insertions(+)
diff --git a/arch/arm/cpu/armv8/zynqmp/mp.c b/arch/arm/cpu/armv8/zynqmp/mp.c
index e10fc3136c..76f889ba7d 100644
--- a/arch/arm/cpu/armv8/zynqmp/mp.c
+++ b/arch/arm/cpu/armv8/zynqmp/mp.c
@@ -206,6 +206,21 @@ static void write_tcm_boot_trampoline(u32 boot_addr)
}
}
+void initialize_tcm(bool mode)
+{
+ if (!mode) {
+ set_r5_tcm_mode(LOCK);
+ set_r5_halt_mode(HALT, LOCK);
+ enable_clock_r5();
+ release_r5_reset(LOCK);
+ } else {
+ set_r5_tcm_mode(SPLIT);
+ set_r5_halt_mode(HALT, SPLIT);
+ enable_clock_r5();
+ release_r5_reset(SPLIT);
+ }
+}
+
int cpu_release(int nr, int argc, char * const argv[])
{
if (nr >= ZYNQMP_CORE_APU0 && nr <= ZYNQMP_CORE_APU3) {
diff --git a/arch/arm/include/asm/arch-zynqmp/sys_proto.h b/arch/arm/include/asm/arch-zynqmp/sys_proto.h
index d91d98a119..3d7fad7731 100644
--- a/arch/arm/include/asm/arch-zynqmp/sys_proto.h
+++ b/arch/arm/include/asm/arch-zynqmp/sys_proto.h
@@ -10,6 +10,11 @@
#define PAYLOAD_ARG_CNT 5
+enum {
+ TCM_LOCK,
+ TCM_SPLIT,
+};
+
int zynq_slcr_get_mio_pin_status(const char *periph);
unsigned int zynqmp_get_silicon_version(void);
@@ -24,4 +29,6 @@ int zynqmp_mmio_read(const u32 address, u32 *value);
int invoke_smc(u32 pm_api_id, u32 arg0, u32 arg1, u32 arg2, u32 arg3,
u32 *ret_payload);
+void initialize_tcm(bool mode);
+
#endif /* _ASM_ARCH_SYS_PROTO_H */
--
2.39.5