imx8: add arch_cpu_init arch_cpu_init_dm
Add arch_cpu_init(_dm) mainly to open the channel between ACore and SCU.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
index f73ce2f..d80b4b1 100644
--- a/arch/arm/mach-imx/imx8/cpu.c
+++ b/arch/arm/mach-imx/imx8/cpu.c
@@ -95,6 +95,57 @@
}
#endif
+#define BT_PASSOVER_TAG 0x504F
+struct pass_over_info_t *get_pass_over_info(void)
+{
+ struct pass_over_info_t *p =
+ (struct pass_over_info_t *)PASS_OVER_INFO_ADDR;
+
+ if (p->barker != BT_PASSOVER_TAG ||
+ p->len != sizeof(struct pass_over_info_t))
+ return NULL;
+
+ return p;
+}
+
+int arch_cpu_init(void)
+{
+ struct pass_over_info_t *pass_over = get_pass_over_info();
+
+ if (pass_over && pass_over->g_ap_mu == 0) {
+ /*
+ * When ap_mu is 0, means the U-Boot booted
+ * from first container
+ */
+ sc_misc_boot_status(-1, SC_MISC_BOOT_STATUS_SUCCESS);
+ }
+
+ return 0;
+}
+
+int arch_cpu_init_dm(void)
+{
+ struct udevice *devp;
+ int node, ret;
+
+ node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "fsl,imx8-mu");
+ ret = device_bind_driver_to_node(gd->dm_root, "imx8_scu", "imx8_scu",
+ offset_to_ofnode(node), &devp);
+
+ if (ret) {
+ printf("could not find scu %d\n", ret);
+ return ret;
+ }
+
+ ret = device_probe(devp);
+ if (ret) {
+ printf("scu probe failed %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
int print_bootinfo(void)
{
enum boot_device bt_dev = get_boot_device();
@@ -252,7 +303,7 @@
if (start > end)
continue;
- /* Find the memory region runs the u-boot */
+ /* Find the memory region runs the U-Boot */
if (start >= PHYS_SDRAM_1 && start <= end1 &&
(start <= CONFIG_SYS_TEXT_BASE &&
end >= CONFIG_SYS_TEXT_BASE)) {