On Mon, Feb 17, 2020 at 02:07:09PM +0100, Matthias Brugger wrote:
On 17/02/2020 13:53, LABBE Corentin wrote:
On Mon, Feb 17, 2020 at 11:50:04AM +0100, Matthias Brugger wrote:
On 17/02/2020 11:37, LABBE Corentin wrote:
On Fri, Feb 14, 2020 at 06:15:27PM +0000, James Morse wrote:
Hi Corentin,
On 14/02/2020 13:27, LABBE Corentin wrote:
Since the inclusion of the "enable network support in RPi4 config" serie on uboot, I have started to work on adding the rpi4 in kernelCI. But I fail to succeed in using a kernel/dtb/ramdisk downloaded via tftp.
Using booti I hit: [ 0.000000] Linux version 5.6.0-rc1-next-20200212 (clabbe@build2-bionic-1804) (gcc version 7.4.1 20181213 [linaro-7.4-2019.02 revision 56ec6f6b99cc167ff0c2f8e1a2eed33b1edc85d4] (Linaro GCC 7.4-2019.02)) #66 SMP PREEMPT Wed Feb 12 10:14:20 UTC 2020 [ 0.000000] Machine model: Raspberry Pi 4 Model B [ 0.000000] earlycon: uart0 at MMIO32 0x00000000fe215040 (options '') [ 0.000000] printk: bootconsole [uart0] enabled [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: UEFI not found.
So no EFI,
[ 0.000000] OF: reserved mem: failed to allocate memory for node 'linux,cma'
Out of memory.
[ 0.000000] cma: Failed to reserve 32 MiB [ 0.000000] Kernel panic - not syncing: Failed to allocate page table page
Out of memory...
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.6.0-rc1-next-20200212 #66 [ 0.000000] Hardware name: Raspberry Pi 4 Model B (DT) [ 0.000000] Call trace: [ 0.000000] dump_backtrace+0x0/0x1a0 [ 0.000000] show_stack+0x14/0x20 [ 0.000000] dump_stack+0xbc/0x104 [ 0.000000] panic+0x16c/0x37c [ 0.000000] early_pgtable_alloc+0x30/0xa0
... really early!
[ 0.000000] __create_pgd_mapping+0x36c/0x588 [ 0.000000] map_kernel_segment+0x70/0xa4 [ 0.000000] paging_init+0xf4/0x528 [ 0.000000] setup_arch+0x250/0x5d8 [ 0.000000] start_kernel+0x90/0x6d8
Since the same kernel boot with bootefi and that bootefi lack ramdisk address,
Booting with EFI will cause linux to use the EFI memory map.
Does your DT have a memory node? (or does it expect EFI to provide the information)
I tried to add the address in the dtb via: fdt addr 0x02400000; fdt resize; fdt set /chosen linux,initrd-start 0x02700000; fdt set /chosen linux,initrd-end 0x10000000; bootefi 0x00080000 0x02400000 But with that, I get: initrd not fully accessible via the linear mapping -- please check your bootloader ...
So this one is an EFI boot, but you can't find where to put the initramfs such that the kernel agrees its in memory.
If you boot with 'efi=debug', linux will print the EFI memory map. Could you compare that to where U-Boot thinks memory is?
(it sounds like your DT memory node is missing, and your EFI memory map is surprisingly small)
Hello
Thanks for your advices.
In the dtb of mainline linux: /* Will be filled by the bootloader */ memory@0 { device_type = "memory"; reg = <0 0 0>; };
In uboot I have: static struct mm_region bcm2711_mem_map[] = { { .virt = 0x00000000UL, .phys = 0x00000000UL, .size = 0xfe000000UL, .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE }, { .virt = 0xfc000000UL, .phys = 0xfc000000UL, .size = 0x03800000UL, .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN }, { /* List terminator */ 0, } }; But I dont know if uboot use that for filling the memory node.
No it doesn't. U-Boot uses the DT from the firmware and passes this to the kernel. But it seems you pass instead your own device-tree to the kernel, so you will need to update the memory node to show the available memory on you board.
I dont understand, in the Linux commit "ARM: dts: Add minimal Raspberry Pi 4 support" I read: The RPi 4 is available in 3 different variants (1, 2 and 4 GB RAM), so leave the memory size to zero and let the bootloader take care of it. But if uboot dont fill that... So the DTB in mainline is wrong, right ?
How do you pass your DTB to the kernel? Does the FW uses your DTB by putting it as bcm2711-rpi-4-b.dtb in the first FAT partition? Or do you load it from U-Boot afterwards? In the latter case you have to take care to add the needed size of memory. In the first case you use what is the default behavior for U-Boot; the RPi FW updates the node and then passes it to U-Boot then it get's passed to the kernel.
Hello
I load the dtb via uboot/tftp. On another thread, I got the hint to enable CONFIG_ARCH_FIXUP_FDT_MEMORY and it made my problem solved.
Thanks Regards