Hi,

I'm working on a dev board the SoC is Broadcom Cygnus with 256MiB of RAM Booting a Kernel and device tree works fine. But booting a Kernel with initramfs and a device tree make a strange behavior.

Don't want to say stupid things but It seems that the Kernel didn't find the device tree and try to fall back using the ATAGS, but since I don't use them the machine ID is not set up.

Do you have any idea of what I did wrong in my setup ?

Thanks, Clement

---------------------------------------- U-Boot 2018.03-rc2-00036-g427c1c7280-dirty (Feb 21 2018 - 16:40:00 +0100)

U-Boot code: 61000000 -> 6103F578 BSS: -> 6104CACC DRAM: Monitor len: 0004CACC Ram size: 0FA00000 Ram top: 6FA00000 TLB table from 6f9f0000 to 6f9f4000 Reserving 306k for U-Boot at: 6f9a3000 Reserving 4101k for malloc() at: 6f5a1c00 Reserving 80 Bytes for Board Info at: 6f5a1bb0 Reserving 184 Bytes for Global Data at: 6f5a1af8

RAM Configuration: Bank #0: 60000000 250 MiB

DRAM: 250 MiB New Stack Pointer is: 6f5a1ad0 Relocation Offset is: 0e9a3000 Relocating to 6f9a3000, new gd at 6f5a1af8, sp at 6f5a1ad0 Now running in RAM - U-Boot at: 6f9a3000 MMC: iproc-sdhci: 0 Loading Environment from MMC... OK In: serial Out: serial Err: serial Net: Registering BCM sf2 eth Broadcom Starfighter2 Ethernet driver 0.1 Using GMAC0 gmac_mac_init: Chip ID: 0xd300 srab_interface_reset: timeout sw_init_done devid read succesfully via srab: 0xd300 devid32: 0xd300 Basic ethernet functionality initialized bcm_sf2_gmac-0

Hit any key to stop autoboot: 0 Booting debug bcm_sf2_gmac-0 Waiting for PHY auto negotiation to complete........ done Change GMAC speed to 1000MB BOOTP broadcast 1 BOOTP broadcast 2 BOOTP broadcast 3 BOOTP broadcast 4 BOOTP broadcast 5 DHCP client bound to address 192.168.0.113 (4043 ms) Change GMAC speed to 1000MB 192.168.0.3 Change GMAC speed to 1000MB Using bcm_sf2_gmac-0 device TFTP from server 192.168.0.3; our IP address is 192.168.0.113 Filename 'boot/zImage'. Load address: 0x63000000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################## 6.5 MiB/s done Bytes transferred = 73245400 (45da2d8 hex) Change GMAC speed to 1000MB Using bcm_sf2_gmac-0 device TFTP from server 192.168.0.3; our IP address is 192.168.0.113 Filename 'boot/myboard.dtb'. Load address: 0x62000000 Loading: # 6.2 MiB/s done Bytes transferred = 25911 (6537 hex) Kernel image @ 0x63000000 [ 0x000000 - 0x45da2d8 ] ## Flattened Device Tree blob at 62000000 Booting using the fdt blob at 0x62000000 Using Device Tree in place at 62000000, end 62009536

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Error: unrecognized/unsupported machine ID (r1 = 0x00000000).

Available machine support:

ID (hex) NAME ffffffff Generic DT based system ffffffff Broadcom Cygnus SoC ffffffff Freescale i.MX6 Quad/DualLite (Device Tree) ffffffff Altera SOCFPGA

Please check your kernel config and/or bootloader.