> From: Thomas Abraham <thomas...@samsung.com>
>
> 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.k...@samsung.com>
> Cc: Alison Wang <alison.w...@nxp.com>
> Signed-off-by: Thomas Abraham <thomas...@samsung.com>
> ---
> arch/arm/mach-exynos/Kconfig | 1 +
> arch/arm/mach-exynos/soc.c | 18 ++++++++++--------
> include/configs/exynos7420-common.h | 1 +
> 3 files changed, 12 insertions(+), 8 deletions(-)
>
> 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 @@ choice
> 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 @@ void enable_caches(void)
> dcache_enable();
> }
> #endif
> -
> -#ifdef CONFIG_ARM64
> -void lowlevel_init(void)
> -{
> - armv8_switch_to_el2();
> - armv8_switch_to_el1();
> -}
> -#endif
> diff --git a/include/configs/exynos7420-common.h
> b/include/configs/exynos7420-common.h
> index f7c4709..1cea74e 100644
> --- a/include/configs/exynos7420-common.h
> +++ b/include/configs/exynos7420-common.h
> @@ -47,6 +47,7 @@
> #define CONFIG_IRAM_BASE 0x02100000
> #define CONFIG_IRAM_SIZE 0x58000
> #define CONFIG_IRAM_END (CONFIG_IRAM_BASE +
> CONFIG_IRAM_SIZE)
> +#define CPU_RELEASE_ADDR secondary_boot_addr
>
> /* Number of CPUs available */
> #define CONFIG_CORE_COUNT 0x8
>
Reviewed-by: Alison Wang <alison.w...@nxp.com>
Thanks.
Best Regards,
Alison Wang
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