Re: [Qemu-devel] [6271] Use ESCC for PowerMac serial

["Blue Swirl" <blauwirbel@gmail.com>]

On 1/12/09, Aurelien Jarno <aurelien@aurel32.net> wrote:
> On Mon, Jan 12, 2009 at 05:40:24PM +0000, Blue Swirl wrote:
>  > Revision: 6271
>  >           http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6271
>  > Author:   blueswir1
>  > Date:     2009-01-12 17:40:23 +0000 (Mon, 12 Jan 2009)
>  >
>  > Log Message:
>  > -----------
>  > Use ESCC for PowerMac serial
>  >
>
>
> [snip]
>
>
>  > Modified: trunk/hw/ppc_oldworld.c
>  > ===================================================================
>  > --- trunk/hw/ppc_oldworld.c   2009-01-12 17:38:28 UTC (rev 6270)
>  > +++ trunk/hw/ppc_oldworld.c   2009-01-12 17:40:23 UTC (rev 6271)
>  > @@ -33,6 +33,7 @@
>  >  #include "pci.h"
>  >  #include "boards.h"
>  >  #include "fw_cfg.h"
>  > +#include "escc.h"
>  >
>  >  #define MAX_IDE_BUS 2
>  >  #define VGA_BIOS_SIZE 65536
>  > @@ -126,7 +127,7 @@
>  >      int vga_bios_size, bios_size;
>  >      qemu_irq *dummy_irq;
>  >      int pic_mem_index, nvram_mem_index, dbdma_mem_index, cuda_mem_index;
>  > -    int ide_mem_index[2];
>  > +    int escc_mem_index, ide_mem_index[2];
>  >      int ppc_boot_device;
>  >      BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
>  >      int index;
>  > @@ -296,8 +297,8 @@
>  >      /* XXX: suppress that */
>  >      dummy_irq = i8259_init(NULL);
>  >
>  > -    /* XXX: use Mac Serial port */
>  > -    serial_init(0x3f8, dummy_irq[4], 115200, serial_hds[0]);
>  > +    escc_mem_index = escc_init(0x80013000, pic[0x10], serial_hds[0],
>  > +                               serial_hds[1], ESCC_CLOCK, 4);
>
>
> I don't think this address is correct. Also this is later mapped by
>  macio_init() later.

It's there to enable some kind of serial console before PCI probing
and device mapping has been done, the address is arbitrary.

Maybe the new mapping could remove the old one.

>  Also I have tried with the latest SVN of OpenBIOS (which includes the
>  corresponding patches for ESCC), and the machine doesn't boot anymore.
>  Using -serial stdio, I see
>
>  | >> =============================================================
>  | >> OpenBIOS 1.0RC1 [Jan 12 2009 19:28]
>  | >> Configuration device id QEMU version 1 machine id 2
>  | >> CPUs: 1
>  | >> Memory: 144M
>  | >> UUID: 00000000-0000-0000-0000-000000000000
>  | >> CPU type PowerPC,750
>  | >> Initializing PCI devices...
>  | >> 0:0.0 - 1057:2 - /pci -
>  | >> 0:1.0 - 1234:1111 - /pci/QEMU,VGA -
>
>  Then it hangs there.

Strange, at least Debian 3.1 R8 (CD and direct -kernel), Debian 4.0 R5
(CD and direct -kernel), Debian 4.0 R6 and Gentoo 2008.0 act like
before.

What kind of setup do you have? At least OpenBIOS config is not
standard, you have enabled PCI debugging.