arm: exynos7420: remove custome low level init function
Remove the custom low-level initialization function and reuse the
default low-level initialization function. But this requires the
ARMV8_MULTIENTRY config option to be enabled for Exynos7420.
On Exynos7420, the boot CPU belongs to the second cluster and so
with ARMV8_MULTIENTRY config option enabled, the 'branch_if_master'
macro fails to detect the CPU as boot CPU. As a temporary workaround
the CPU_RELEASE_ADDR is set to point to '_main'.
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Alison Wang <alison.wang@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index ce2a16f..07118fc 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -126,6 +126,7 @@
config TARGET_ESPRESSO7420
bool "ESPRESSO7420 board"
select ARM64
+ select ARMV8_MULTIENTRY
select SUPPORT_SPL
select OF_CONTROL
select SPL_DISABLE_OF_CONTROL
diff --git a/arch/arm/mach-exynos/soc.c b/arch/arm/mach-exynos/soc.c
index f9c7468..cf149ad 100644
--- a/arch/arm/mach-exynos/soc.c
+++ b/arch/arm/mach-exynos/soc.c
@@ -9,6 +9,16 @@
#include <asm/io.h>
#include <asm/system.h>
+#ifdef CONFIG_TARGET_ESPRESSO7420
+/*
+ * Exynos7420 uses CPU0 of Cluster-1 as boot CPU. Due to this, branch_if_master
+ * fails to identify as the boot CPU as the master CPU. As temporary workaround,
+ * setup the slave CPU boot address as "_main".
+ */
+extern void _main(void);
+void *secondary_boot_addr = (void *)_main;
+#endif /* CONFIG_TARGET_ESPRESSO7420 */
+
void reset_cpu(ulong addr)
{
#ifdef CONFIG_CPU_V7
@@ -23,11 +33,3 @@
dcache_enable();
}
#endif
-
-#ifdef CONFIG_ARM64
-void lowlevel_init(void)
-{
- armv8_switch_to_el2();
- armv8_switch_to_el1();
-}
-#endif