I try to running coreboot on HiFive Unleashed, but nothing come from uart.
I tested by the following steps:
1. Write hifive-unleashed-a00-1.0-2018-03-20.gpt to TF card. 2. Change MSEL to 11 and boot linux 3. Copy coreboot.rom via scp 4. Write coreboot.rom to /dev/mtd0 by flashcp. 5. Change MSEL to 15 and boot coreboot. No response on uart.
Do you have any suggestions?
Hi!
On Mon, Nov 26, 2018 at 02:54:46PM +0800, 王翔 wrote:
How did you listen to the UART? Note that the FTDI Chip on the H5U will show up as two serial ports on the computer that it is connected to (usually /dev/ttyUSB0 and /dev/ttyUSB1). The first one is for JTAG and the second one is for UART. Also make sure that you configure the right baud rate (115200 usually) on /dev/ttyUSB1.
You might also have to power-cycle the board and/or press the reset button. Sometimes that helps.
If you continue to see no output, perhaps there is a bug in coreboot that prevents the output. Whenever I tested coreboot on the H5U, I could always see output, but I haven't tested it recently.
Jonathan Neuschäfer
I am sure my uart configuration is 115200 8N1 on /dev/ttyUSB1. I have a power cycle after the burn is complete.
在2018年11月26 18时03分, "Jonathan Neuschäfer"j.neuschaefer@gmx.net写道:
Hi!
On Mon, Nov 26, 2018 at 02:54:46PM +0800, 王翔 wrote:
How did you listen to the UART? Note that the FTDI Chip on the H5U will show up as two serial ports on the computer that it is connected to (usually /dev/ttyUSB0 and /dev/ttyUSB1). The first one is for JTAG and the second one is for UART. Also make sure that you configure the right baud rate (115200 usually) on /dev/ttyUSB1.
You might also have to power-cycle the board and/or press the reset button. Sometimes that helps.
If you continue to see no output, perhaps there is a bug in coreboot that prevents the output. Whenever I tested coreboot on the H5U, I could always see output, but I haven't tested it recently.
Jonathan Neuschäfer
I tried it again. Press reset key can see the serial output. Maybe the power is turned on too fast. The computer does not capture the serial port data.
Below is my serial output
Thank you for your help.
在2018年11月27 10时56分, "王翔"wxjstz@126.com写道:
I am sure my uart configuration is 115200 8N1 on /dev/ttyUSB1. I have a power cycle after the burn is complete.
在2018年11月26 18时03分, "Jonathan Neuschäfer"j.neuschaefer@gmx.net写道:
Hi!
On Mon, Nov 26, 2018 at 02:54:46PM +0800, 王翔 wrote:
How did you listen to the UART? Note that the FTDI Chip on the H5U will show up as two serial ports on the computer that it is connected to (usually /dev/ttyUSB0 and /dev/ttyUSB1). The first one is for JTAG and the second one is for UART. Also make sure that you configure the right baud rate (115200 usually) on /dev/ttyUSB1.
You might also have to power-cycle the board and/or press the reset button. Sometimes that helps.
If you continue to see no output, perhaps there is a bug in coreboot that prevents the output. Whenever I tested coreboot on the H5U, I could always see output, but I haven't tested it recently.
Jonathan Neuschäfer
On Tue, Nov 27, 2018 at 12:20:53PM +0800, 王翔 wrote:
Unfortunately, the FTDI chip is also behind the power button, so when you release the power button, the FTDI chip starts up, and minicom has to reconnect, and at the same time the SoC already starts running and printing things on the UART.
Something like this helps sometimes:
- Power the board off via the power button - Press and hold the reset button - Power the board on - Wait until minicom has reconnected - Release the reset button
Below is my serial output
[...]
Hmm, this looks like a bug.
Jonathan Neuschäfer
Hi again,
On Tue, Nov 27, 2018 at 12:20:53PM +0800, 王翔 wrote:
I just tried the same version (coreboot-4.8-2282-gc88828daeb), and it worked, both with a 1 MiB coreboot image and a 32 MiB coreboot image:
coreboot-4.8-2282-gc88828daeb Mon Nov 26 09:56:26 UTC 2018 bootblock starting... Boot mode: 15 CBFS: 'Master Header Locator' located CBFS at [20100:2000000) CBFS: Locating 'fallback/romstage' CBFS: Found @ offset 80 size 2dca
CBMEM:ot-4.8-2282-gc88828daeb Mon Nov 26 09:56:26 UTC 2018 romstage starting... IMD: root @ 000000027ffff000 254 entries. IMD: root @ 000000027fffec00 62 entries. CBFS: 'Master Header Locator' located CBFS at [20100:2000000) CBFS: Locating 'fallback/ramstage' CBFS: Found @ offset 2ec0 size 532f
coreboot-4.8-2282-gc88828daeb Mon Nov 26 09:56:26 UTC 2018 ramstage starting... BS: BS_PRE_DEVICE times (us): entry 0 run 0 exit 1 BS: BS_DEV_INIT_CHIPS times (us): entry 1 run 0 exit 0 Enumerating buses... CPU_CLUSTER: 0 enabled scan_bus: scanning of bus Root Device took 2050 usecs done BS: BS_DEV_ENUMERATE times (us): entry 1 run 9289 exit 1 Allocating resources... Reading resources... CPU_CLUSTER: 0 missing read_resources Done reading resources. Setting resources... Done setting resources. Done allocating resources. BS: BS_DEV_RESOURCES times (us): entry 0 run 16149 exit 0 Enabling resources... done. BS: BS_DEV_ENABLE times (us): entry 0 run 2605 exit 0 Initializing devices... Root Device init ... Root Device init finished in 1910 usecs Devices initialized BS: BS_DEV_INIT times (us): entry 0 run 9464 exit 0 Finalize devices... Devices finalized BS: BS_POST_DEVICE times (us): entry 0 run 3473 exit 0 BS: BS_OS_RESUME_CHECK times (us): entry 0 run 1 exit 0 Writing coreboot table at 0x27ffdc000 0. 0000000080000000-0000000080011fff: RAMSTAGE 1. 0000000080012000-000000008003ffff: RAM 2. 0000000080040000-0000000080044fff: RAMSTAGE 3. 0000000080045000-000000027ffdbfff: RAM 4. 000000027ffdc000-000000027fffffff: CONFIGURATION TABLES
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000de2 Bad address: 000000027ffdc0f4 Stored ra: 0000000080000d36 Stored sp: 0000000080040ec8 CBFS: 'Master Header Locator' located CBFS at [20100:2000000)
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d6a Bad address: 000000027ffdc10c Stored ra: 0000000080000d66 Stored sp: 0000000080040ec8
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d6e Bad address: 000000027ffdc114 Stored ra: 0000000080000d66 Stored sp: 0000000080040ec8
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d74 Bad address: 000000027ffdc11c Stored ra: 0000000080000d66 Stored sp: 0000000080040ec8
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d7e Bad address: 000000027ffdc0fc Stored ra: 0000000080000d66 Stored sp: 0000000080040ec8
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d82 Bad address: 000000027ffdc104 Stored ra: 0000000080000d66 Stored sp: 0000000080040ec8 FMAP: Found "FLASH" version 1.1 at 20000. FMAP: base = 0 size = 2000000 #areas = 4
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080000d8e Bad address: 000000027ffdc104 Stored ra: 0000000080000d8a Stored sp: 0000000080040ec8
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080001c68 Bad address: 000000027ffdc124 Stored ra: 0000000080001c66 Stored sp: 0000000080040e58
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080001c72 Bad address: 000000027ffdc12c Stored ra: 0000000080001c72 Stored sp: 0000000080040e58
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080001c68 Bad address: 000000027ffdc13c Stored ra: 0000000080001c66 Stored sp: 0000000080040e58
Exception: Store address misaligned Previous mode: machine Bad instruction pc: 0000000080001c72 Bad address: 000000027ffdc144 Stored ra: 0000000080001c72 Stored sp: 0000000080040e58 Wrote coreboot table at: 000000027ffdc000, 0x13c bytes, checksum fd30 coreboot table: 340 bytes. IMD ROOT 0. 000000027ffff000 00001000 IMD SMALL 1. 000000027fffe000 00001000 CONSOLE 2. 000000027ffde000 00020000 COREBOOT 3. 000000027ffdc000 00002000 IMD small region: IMD ROOT 0. 000000027fffec00 00000400 BS: BS_WRITE_TABLES times (us): entry 0 run 285035 exit 0 CBFS: 'Master Header Locator' located CBFS at [20100:2000000) CBFS: Locating 'fallback/payload' CBFS: 'fallback/payload' not found. Payload not loaded.
One thing I did differently was to program the flash via OpenOCD[1], rather than from Linux like you did it. Maybe something is broken in Linux or flashcp?
Jonathan
[1]: https://doc.coreboot.org/mainboard/sifive/hifive-unleashed.html#usb-jtag
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Jonathan Neuschäfer -
王翔