[U-Boot] [PATCH v2 2/3] mach-imx: bootaux: add dcache flushing before enabling M4

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk at 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 at 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);
-- 
2.17.1