[PATCH 1/2] ARM: zynq: add Zynq specific lowlevel CPU init function

[PATCH 1/2] ARM: zynq: add Zynq specific lowlevel CPU init function

[Lucas Stach]

This adds a Zynq specific CPU lowlevel init function, which applies
the required workarounds for the Cortex A9 r3p0 core.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
---
 arch/arm/mach-zynq/Makefile            |  1 +
 arch/arm/mach-zynq/cpu_init.c          | 15 +++++++++++++++
 arch/arm/mach-zynq/include/mach/init.h |  8 ++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 arch/arm/mach-zynq/cpu_init.c
 create mode 100644 arch/arm/mach-zynq/include/mach/init.h

diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile
index c88ab4666f0f..06c2ce996cfa 100644
--- a/arch/arm/mach-zynq/Makefile
+++ b/arch/arm/mach-zynq/Makefile
@@ -1 +1,2 @@
 obj-y += zynq.o bootm-zynqimg.o
+lwl-y += cpu_init.o
diff --git a/arch/arm/mach-zynq/cpu_init.c b/arch/arm/mach-zynq/cpu_init.c
new file mode 100644
index 000000000000..ec5ee59e169d
--- /dev/null
+++ b/arch/arm/mach-zynq/cpu_init.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <common.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/errata.h>
+#include <mach/init.h>
+
+void zynq_cpu_lowlevel_init(void)
+{
+	arm_cpu_lowlevel_init();
+
+	enable_arm_errata_761320_war();
+	enable_arm_errata_794072_war();
+	enable_arm_errata_845369_war();
+}
diff --git a/arch/arm/mach-zynq/include/mach/init.h b/arch/arm/mach-zynq/include/mach/init.h
new file mode 100644
index 000000000000..c458f602e4d7
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/init.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __MACH_INIT_H
+#define __MACH_INIT_H
+
+void zynq_cpu_lowlevel_init(void);
+
+#endif
-- 
2.24.1


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[PATCH 2/2] ARM: zynq: zed: use zynq_cpu_lowlevel_init()

[Lucas Stach]

Make sure the required workarounds for CPU errata are applied.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
---
 arch/arm/boards/avnet-zedboard/lowlevel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boards/avnet-zedboard/lowlevel.c b/arch/arm/boards/avnet-zedboard/lowlevel.c
index 58f9e40d11c9..c987db75b068 100644
--- a/arch/arm/boards/avnet-zedboard/lowlevel.c
+++ b/arch/arm/boards/avnet-zedboard/lowlevel.c
@@ -20,6 +20,7 @@
 #include <io.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
+#include <mach/init.h>
 #include <mach/zynq7000-regs.h>
 
 #define DCI_DONE	(1 << 13)
@@ -283,7 +284,7 @@ ENTRY_FUNCTION(start_avnet_zedboard, r0, r1, r2)
 
 	void *fdt = __dtb_zynq_zed_start + get_runtime_offset();
 
-	arm_cpu_lowlevel_init();
+	zynq_cpu_lowlevel_init();
 
 	avnet_zedboard_ps7_init();
 
-- 
2.24.1


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Re: [PATCH 1/2] ARM: zynq: add Zynq specific lowlevel CPU init function

[Sascha Hauer]

On Mon, Jan 06, 2020 at 09:29:44PM +0100, Lucas Stach wrote:
> This adds a Zynq specific CPU lowlevel init function, which applies
> the required workarounds for the Cortex A9 r3p0 core.
> 
> Signed-off-by: Lucas Stach <dev@lynxeye.de>
> ---
>  arch/arm/mach-zynq/Makefile            |  1 +
>  arch/arm/mach-zynq/cpu_init.c          | 15 +++++++++++++++
>  arch/arm/mach-zynq/include/mach/init.h |  8 ++++++++
>  3 files changed, 24 insertions(+)
>  create mode 100644 arch/arm/mach-zynq/cpu_init.c
>  create mode 100644 arch/arm/mach-zynq/include/mach/init.h

Applied, thanks

Sascha


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