From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 1/2] ARM: i.MX6ull: Add SoC specific lowlevel_init function
Date: Wed, 27 Sep 2017 14:16:56 +0200 [thread overview]
Message-ID: <20170927121657.16274-1-s.hauer@pengutronix.de> (raw)
On i.MX6ull (Cortex A7) We have to set the SMP bit before enabling the
caches, otherwise they won't work. Add a SoC specific lowlevel_init
function to be called by the i.MX6ull boards.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/mach-imx/cpu_init.c | 12 ++++++++++++
arch/arm/mach-imx/include/mach/generic.h | 1 +
2 files changed, 13 insertions(+)
diff --git a/arch/arm/mach-imx/cpu_init.c b/arch/arm/mach-imx/cpu_init.c
index 2b388cad8c..8f6d4b7902 100644
--- a/arch/arm/mach-imx/cpu_init.c
+++ b/arch/arm/mach-imx/cpu_init.c
@@ -14,6 +14,7 @@
#include <asm/barebox-arm-head.h>
#include <asm/errata.h>
+#include <linux/types.h>
void imx5_cpu_lowlevel_init(void)
{
@@ -34,6 +35,17 @@ void imx6_cpu_lowlevel_init(void)
enable_arm_errata_845369_war();
}
+void imx6ull_cpu_lowlevel_init(void)
+{
+ u32 val;
+
+ asm volatile ("mrc p15, 0, %0, c1, c0, 1\n" : "=r"(val));
+ val |= (1 << 6);
+ asm volatile("mcr p15, 0, %0, c1, c0, 1" : : "r" (val));
+
+ arm_cpu_lowlevel_init();
+}
+
void imx7_cpu_lowlevel_init(void)
{
arm_cpu_lowlevel_init();
diff --git a/arch/arm/mach-imx/include/mach/generic.h b/arch/arm/mach-imx/include/mach/generic.h
index 73be9ceb55..eb8c7a5b7b 100644
--- a/arch/arm/mach-imx/include/mach/generic.h
+++ b/arch/arm/mach-imx/include/mach/generic.h
@@ -48,6 +48,7 @@ int imx6_devices_init(void);
void imx5_cpu_lowlevel_init(void);
void imx6_cpu_lowlevel_init(void);
+void imx6ull_cpu_lowlevel_init(void);
void imx7_cpu_lowlevel_init(void);
void vf610_cpu_lowlevel_init(void);
--
2.11.0
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next reply other threads:[~2017-09-27 12:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-27 12:16 Sascha Hauer [this message]
2017-09-27 12:16 ` [PATCH 2/2] i.MX6ull evk support Sascha Hauer
2017-09-28 9:16 ` Lucas Stach
2017-09-28 9:26 ` Sascha Hauer
2017-09-28 9:33 ` Lucas Stach
2017-09-28 10:13 ` Sascha Hauer
2017-10-10 14:04 ` Philipp Zabel
2017-09-28 9:09 ` [PATCH 1/2] ARM: i.MX6ull: Add SoC specific lowlevel_init function Lucas Stach
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