Linux kernel 4.19.35
Currently, I am flashing kernel 4.19.35 and my custom device tree in the imx8qxp custom board via fastboot.
UUU command:
CFG: FB: -vid 0x1fc9 -pid 0x012f
FB: ucmd setenv fastboot_buffer ${loadaddr}
FB: download -f Image
FB: ucmd setenv fastboot_buffer ${fdt_addr}
FB: download -f fsl-imx8qxp-mek.dtb
FB: download -f unimog-imx8qxp-sthu.dtb
FB: acmd booti ${loadaddr} - ${fdt_addr}
FB: done
SCFW:
SCFW only uses gpt4 for M4.
ATF:
imx8qx_bl31_setup.c handles the gpt0 . Only change made in ATF firmware was changing from uart0 to uart1, as the custom boards handles.
As the bl31 firmware handles the gpt0 for linux kernel, while booting my device tree and Image, why is gpt0 not owned by A35 kernel?
Hello Igor,
Thanks for the reply.
SCFW:
board.c file is my custom scfw .c file for my custom board pmic configuration based on imx8qxp-mek board.c.
Only GPT4 is used as a resource for m4.
BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_GPT_4, SC_R_GPT_4, SC_TRUE));
ATF:
The ATF-firmware bl31 handles the SC_R_GPT_0 for the linux kernel.
It initializes the GPT_0. Please check the attachment imx8qx_bl31_setup.c and sec_rsrc.h
/* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */ sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON); sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0); mmio_write_32(IMX_GPT0_LPCG_BASE, mmio_read_32(IMX_GPT0_LPCG_BASE) | (1 << 25));
I am not understanding why resource id is not owned in linux device tree as it is configured in atf firmware.
Device Tree also used in imx8qxp-mek:
gpt0: gpt0@5d140000 {
compatible = "fsl,imx8qxp-gpt";
reg = <0x0 0x5d140000 0x0 0x4000>;
interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clk IMX8QXP_CLK_DUMMY>, <&clk IMX8QXP_GPT_3M>;
clock-names = "ipg", "per";
power-domains = <&pd_lsio_gpt0>;
};
I hope you have an overview now on my configuration, after checking the files.
According to my understanding my configuration does not allow gpt0 to be used in m4. Please let me know how can I handle the issue and where I am making the mistake.
Kind Regards,
Hossain
Thanks a lot for the support.
Currently my scfw configured with partitioning. Your reference helped me to build the scfw correctly.
make SOC=iMX8QX flash_linux_m4
SCU console: (provided also in attachment)
Partition 0: --> SCU
Partion 1:-> A35 "In partition 1 gpt_0 is enabled"
GPT_0
GPT_1
GPT_2
GPT_3
But with this flash.bin file, my bootloader is not flashing I think this due to addressing issue. The reason is flash_linux_m4 does not use:
AP: u-boot-atf.bin core: a35 addr: 0x80000000
Do you think also the same?
Thanks a lot for your informations.
Kind Regards,
Hossain
Thanks for the reply.
I have made the following changes in board.c file. Currently I disabled m4 resource.
sc_err_t board_system_config(sc_bool_t early, sc_rm_pt_t pt_boot)
{
sc_err_t err = SC_ERR_NONE;
/* This function configures the system. It usually partitions
resources according to the system design. It must be modified by
customers. Partitions should then be specified using the mkimage
-p option. *//* Note the configuration here is for NXP test purposes */
sc_bool_t alt_config = SC_FALSE;
sc_bool_t no_ap = SC_FALSE;
/* Get boot parameters. See the Boot Flags section for defintition
of these flags.*/
(void) boot_get_data(NULL, NULL, NULL, NULL, NULL, NULL, &alt_config,
NULL, NULL, &no_ap);board_print(3, "board_system_config(%d, %d)\n", early, alt_config);
/* Configure initial resource allocation (note additional allocation
and assignments can be made by the SCFW clients at run-time */
if (alt_config != SC_FALSE)
{
sc_rm_pt_t pt_a35;#ifdef BOARD_RM_DUMP
rm_dump(pt_boot);
#endif/* Mark all resources as not movable */
BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_ALL, SC_R_ALL,
SC_FALSE));
BRD_ERR(rm_set_pad_movable(pt_boot, SC_P_ALL, SC_P_ALL,
SC_FALSE));/* Allocate A35 partition */
BRD_ERR(rm_partition_alloc(pt_boot, &pt_a35, SC_FALSE, SC_TRUE,
SC_FALSE, SC_TRUE, SC_FALSE));/* Mark all A35 subsystem resources as movable */
BRD_ERR(rm_set_subsys_rsrc_movable(pt_boot, SC_R_A35,
SC_TRUE));BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_GPT_0,
SC_R_GPT_0, SC_TRUE));/* Move partition to be owned by SC */
BRD_ERR(rm_set_parent(pt_boot, pt_a35, SC_PT));/* Move boot to be owned by a35 0 */
if (no_ap != SC_FALSE)
{
BRD_ERR(rm_set_parent(SC_PT, pt_boot, pt_a35));
}#ifdef BOARD_RM_DUMP
rm_dump(pt_boot);
#endif
}
else
{
err = SC_ERR_UNAVAILABLE;
}return err;
I am unable to write on the UART for SCU.
