Dear Paul,
On 6.02.2023 14:54, Paul Menzel wrote:
Dear Łukasz,
Am 03.02.23 um 10:24 schrieb Łukasz Jeleń:
i've tried to turn on logging on serial console with:
serial --port=0xA0019000 --speed=115200 --word=8 --parity=no --stop=1
terminal_input --append serial
terminal_output --append serial
added to grub.cfg, but it does not work.
The thing I found: Quark soc has HSUART connected to MMIO32 at
0xA0019000, but GRUB expects serial to be at standard IO port e.g.:
0x03F8
Is there a way to make use MMIO32 serial with GRUB?
I just know of the patches posted to the mailing list [1], but never
dealt with that topic.
I'll check that.
In SeaBIOS I can choose MMIO32 port at building stage with
CONFIG_DEBUG_SERIAL_MMIO and CONFIG_DEBUG_SERIAL_MEM_ADDRESS and it
works.
Where does it fail with SeaBIOS?
Here are logs from SeaBIOS (config: GRUB atop SeaBIOS):
"""
SeaBIOS (version rel-1.16.1-0-g3208b09)
BUILD: gcc: (coreboot toolchain v2023-02-01_b63eb4d172) 11.2.0 binutils:
(GNU Binutils) 2.37
SeaBIOS (version rel-1.16.1-0-g3208b09)
BUILD: gcc: (coreboot toolchain v2023-02-01_b63eb4d172) 11.2.0 binutils:
(GNU Binutils) 2.37
Found coreboot cbmem console @ fece000
Found mainboard Intel Galileo
Relocating init from 0x000e0440 to 0x0ee40aa0 (size 54464)
Found CBFS header at 0xffe0022c
multiboot: eax=feb5c18, ebx=feb5be4
Found 15 PCI devices (max PCI bus is 01)
Copying SMBIOS from 0x0fe4e000 to 0x000f67c0
Copying SMBIOS 3.0 from 0x0fe4e020 to 0x000f67a0
Copying ACPI RSDP from 0x0fe66000 to 0x000f6770
table(50434146)=0x0fe662f0 (via xsdt)
Using pmtimer, ioport 0x1008
table(324d5054)=0x0fe66480 (via xsdt)
WARNING - Timeout at wait_reg8:81!
Scan for VGA option rom
No VGA found, scan for other display
Turning on vga text mode console
SeaBIOS (version rel-1.16.1-0-g3208b09)
WARNING - internal error detected at pci_enable_membar:186!
WARNING - internal error detected at pci_enable_membar:186!
WARNING - Timeout at i8042_flush:71!
All threads complete.
WARNING - internal error detected at pci_enable_membar:186!
All threads complete.
Searching bootorder for: HALT
Found 0 lpt ports
Found 0 serial ports
Searching bootorder for: /rom@img/grub2
Scan for option roms
Searching bootorder for: HALT
Space available for UMB: c0000-ed000, f5fe0-f6770
Returned 16777216 bytes of ZoneHigh
e820 map has 5 items:
0: 0000000000000000 - 000000000009fc00 = 1 RAM
1: 000000000009fc00 - 00000000000a0000 = 2 RESERVED
2: 00000000000f0000 - 0000000000100000 = 2 RESERVED
3: 0000000000100000 - 000000000fe4e000 = 1 RAM
4: 000000000fe4e000 - 0000000100000000 = 2 RESERVED
enter handle_19:
NULL
Booting from CBFS...
Run img/grub2
Calling addr 0x00009000
"""
It means it hands over control to GRUB. I've checked with qemu that
after "Calling addr 0x00009000" GRUB starts logging on screen / serial.
So I see two possible scenarios:
- GRUB started to work, but it cannot log to MMIO32 so it looks
like it hung
- GRUB doesn't work.
I'll check that MMIO32 patch and experiment with LED.
Kind regards,
Łukasz
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