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imx8: add arch_cpu_init arch_cpu_init_dm

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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>
This commit is contained in:
Peng Fan 2018-10-18 14:28:22 +02:00 committed by Stefano Babic
parent 930b595291
commit 1ef20a3d81
2 changed files with 61 additions and 1 deletions
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9
arch/arm/include/asm/arch-imx8/sys_proto.h
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@ -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);

53
arch/arm/mach-imx/imx8/cpu.c
View File

@ -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)) {