From: Peng Fan peng.fan@nxp.com
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 --- arch/arm/include/asm/arch-imx8/sys_proto.h | 9 ++++ arch/arm/mach-imx/imx8/cpu.c | 53 +++++++++++++++++++++- 2 files changed, 61 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/arch-imx8/sys_proto.h b/arch/arm/include/asm/arch-imx8/sys_proto.h index f9a3016132..73ffaba7d5 100644 --- a/arch/arm/include/asm/arch-imx8/sys_proto.h +++ b/arch/arm/include/asm/arch-imx8/sys_proto.h @@ -6,5 +6,14 @@ #include <asm/mach-imx/sys_proto.h> #include <linux/types.h>
+struct pass_over_info_t { + u16 barker; + u16 len; + u32 g_bt_cfg_shadow; + u32 card_address_mode; + u32 bad_block_count_met; + u32 g_ap_mu; +}; + enum boot_device get_boot_device(void); int print_bootinfo(void); diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c index f73ce2fde3..d80b4b175d 100644 --- a/arch/arm/mach-imx/imx8/cpu.c +++ b/arch/arm/mach-imx/imx8/cpu.c @@ -95,6 +95,57 @@ int print_cpuinfo(void) } #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 @@ phys_size_t get_effective_memsize(void) 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)) {