ENGR00315894-57 iMX6SX: Add M4 boot support at soc level

Implement the override function "arch_auxiliary_core_up" to boot
Cortex-M4 by executing command "bootaux".
The parameter "boot_private_data" points to fields where stores
the stack address and PC address for M4 to run.

Signed-off-by: Ye.Li <B37916@freescale.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index b31ad04..3b8f613 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -516,6 +516,31 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 }
 #endif
 
+#ifdef CONFIG_MX6SX
+int arch_auxiliary_core_up(u32 core_id, u32 boot_private_data)
+{
+	struct src *src_reg;
+	u32 stack, pc;
+
+	if (!boot_private_data)
+		return 1;
+
+	stack = *(u32 *)boot_private_data;
+	pc = *(u32 *)(boot_private_data + 4);
+
+	/* Set the stack and pc to M4 bootROM */
+	writel(stack, M4_BOOTROM_BASE_ADDR);
+	writel(pc, M4_BOOTROM_BASE_ADDR + 4);
+
+	/* Enable M4 */
+	src_reg = (struct src *)SRC_BASE_ADDR;
+	setbits_le32(&src_reg->scr, 0x00400000);
+	clrbits_le32(&src_reg->scr, 0x00000010);
+
+	return 0;
+}
+#endif
+
 void boot_mode_apply(unsigned cfg_val)
 {
 	unsigned reg;