Hello, I would be grateful for some advice on the problem described below.
I have coreboot running successfully on our own hardware based around the Intel Atom E3805. Recently I wanted to debug our boot process to determine the settings of some PCU iLB Low Pin Count (LPC) Bridge PCI Configuration Registers. I have the Intel System Debugger connect via the Itel ITP XDP BR3 probe. If I simply run coreboot from the debugger it hangs. I cannot pause the debugger since the target is reported as still running (reported in its debug logs).
The console log extract is:
============= PEIM FSP (VLYVIEW0 0x00000304) ============= Register PPI Notify: DCD0BE23-9586-40F4-B643-06522CED4EDE Install PPI: 8C8CE578-8A3D-4F1C-9935-896185C32DD3 Install PPI: 5473C07A-3DCB-4DCA-BD6F-1E9689E7349A The 0th FV start address is 0x000FFFE0400, size is 0x00017C00, handle is 0x0 Register PPI Notify: 49EDB1C1-BF21-4761-BB12-EB0031AABB39 Register PPI Notify: EA7CA24B-DED5-4DAD-A389-BF827E8F9B38 Install PPI: B9E0ABFE-5979-4914-977F-6DEE78C278A6 Install PPI: DBE23AA9-A345-4B97-85B6-B226F1617389
þInstall PPI: 06E81C58-4AD7-44BC-8390-F10265F72480 Install PPI: 01F34D25-4DE2-23AD-3FF3-36353FF323F1
Install PPI: 49EDB1C1-BF21-4761-BB12-EB0031AABB39 Notify: PPI Guid: 49EDB1C1-BF21-4761-BB12-EB0031AABB39, Peim notify entry point: FFFE0FD4 The 1th FV start address is 0x000FFFB0000, size is 0x0002F400, handle is 0xFFFB0000
øInstall PPI: A55D6970-1306-440C-8C72-8F51FAFB2926
þPcdMrcInitTsegSize = 8 PcdMrcInitMmioSize = 800 PcdMrcInitSPDAddr1 = A0 PcdMrcInitSPDAddr2 = A2 Setting BootMode to 0 Install PPI: 1F4C6F90-B06B-48D8-A201-BAE5F1CD7D56 Register PPI Notify: F894643D-C449-42D1-8EA8-85BDD8C65BDE About to call MrcInit(); BayleyBay Platform Type RID = 0x11. Reg_EFF_DualCH_EN = 0x40030040. CurrentMrcData.BootMode = 4 Configuring Memory Start...
Without using the debugger everything is fine:
============= PEIM FSP (VLYVIEW0 0x00000304) ============= Register PPI Notify: DCD0BE23-9586-40F4-B643-06522CED4EDE Install PPI: 8C8CE578-8A3D-4F1C-9935-896185C32DD3 Install PPI: 5473C07A-3DCB-4DCA-BD6F-1E9689E7349A The 0th FV start address is 0x000FFFE0400, size is 0x00017C00, handle is 0x0 Register PPI Notify: 49EDB1C1-BF21-4761-BB12-EB0031AABB39 Register PPI Notify: EA7CA24B-DED5-4DAD-A389-BF827E8F9B38 Install PPI: B9E0ABFE-5979-4914-977F-6DEE78C278A6 Install PPI: DBE23AA9-A345-4B97-85B6-B226F1617389
þInstall PPI: 06E81C58-4AD7-44BC-8390-F10265F72480 Install PPI: 01F34D25-4DE2-23AD-3FF3-36353FF323F1
Install PPI: 49EDB1C1-BF21-4761-BB12-EB0031AABB39 Notify: PPI Guid: 49EDB1C1-BF21-4761-BB12-EB0031AABB39, Peim notify entry point: FFFE0FD4 The 1th FV start address is 0x000FFFB0000, size is 0x0002F400, handle is 0xFFFB0000
ðInstall PPI: A55D6970-1306-440C-8C72-8F51FAFB2926
þPcdMrcInitTsegSize = 8 PcdMrcInitMmioSize = 800 PcdMrcInitSPDAddr1 = A0 PcdMrcInitSPDAddr2 = A2 Setting BootMode to 0 Install PPI: 1F4C6F90-B06B-48D8-A201-BAE5F1CD7D56 Register PPI Notify: F894643D-C449-42D1-8EA8-85BDD8C65BDE About to call MrcInit(); BayleyBay Platform Type RID = 0x11. Reg_EFF_DualCH_EN = 0x40030040. CurrentMrcData.BootMode = 4 Configuring Memory Start... START_RMT: RxDqLeft RxDqRight RxVLow RxVHigh TxDqLeft TxDqRight CmdLeft CmdRight ------------------------------------------------------------------------------------------------ Channel 0 Rank 0 -23 24 -24 16 -27 28 0 0 STOP_RMT: CMD module is per channel only and without Rank differentiation Configuring Memory End UpperTotalMemory = 0x80000000 dBMBOUND = 0x80000000 dBMBOUNDHI = 0x80000000 dGFXBase = 0x7BE00000 dTSegBase = 0x7B000000 Save MRC params.
Coreboot is version coreboot-4.5 Intel FSP is Baytrail_FSP_Gold4
I realise I am in the Intel FSP so do not think it is a direct coreboot problem but has anybody got a similar debug setup and can confirm it works? If it should work maybe we have a board fault in the jtag area. It just seems weird at this point.
Many thanks, Graham Perkins.
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Perkins, Graham (GB)