From: Igor Opaniuk igor.opaniuk@toradex.com
This patch fixes the issue with broken bootaux command, when M4 binary is loaded and data cache isn't flushed before M4 core is enabled.
Reproducing:
tftpboot ${loadaddr} ${board_name}/hello_world.bin cp.b ${loadaddr} 0x7F8000 $filesize bootaux 0x7F8000
Signed-off-by: Igor Opaniuk igor.opaniuk@toradex.com ---
arch/arm/mach-imx/imx_bootaux.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/mach-imx/imx_bootaux.c b/arch/arm/mach-imx/imx_bootaux.c index ee786f7d06..c750cee60c 100644 --- a/arch/arm/mach-imx/imx_bootaux.c +++ b/arch/arm/mach-imx/imx_bootaux.c @@ -27,6 +27,8 @@ int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data) writel(stack, M4_BOOTROM_BASE_ADDR); writel(pc, M4_BOOTROM_BASE_ADDR + 4);
+ flush_dcache_all(); + /* Enable M4 */ #ifdef CONFIG_IMX8M call_imx_sip(IMX_SIP_SRC, IMX_SIP_SRC_M4_START, 0, 0, 0);