Dear All,
thanks for the help.
I used the last svn copy and it works fine:
URL: svn://svn.savannah.nongnu.org/qemu/trunk
Repository Root: svn://svn.savannah.nongnu.org/qemu
Repository UUID: c046a42c-6fe2-441c-8c8c-71466251a162
Revision: 6436
Anyway I created a trivial patch in order to permit to have an arbitrary flash
size on mips board (I'm need to simulate a board with 32MB instead the usual
4M). Using the patch, the flash memory placed at the end of 0xbfxxxxxxxx
memory space:
4MB flash: start bfc00000 -> end bfffffff
8MB flash: start bf800000 -> end bfffffff
16MB flash: start bf000000 -> end bfffffff
32MB flash: start be000000 -> end bfffffff
The firmware must be placed always at address 0xbfc00000. these are the
relative address on the file:
4MB flash: firmware offset +0
8MB flash: firmware offset +4MB
16MB flash: firmware offset +12MB
32MB flash: firmware offset +28MB
To create the image files, use the following trivial script:
dd if=/dev/zero of=flash.img bs=$flashsize count=1 conv=sync
dd if=u-boot.bi of=flash.img bs=1 seek=$biosbase conv=notrunc
Thanks again for your support.
luigi
On Monday 26 January 2009 13:53:07 Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 10:13 Mon 26 Jan , Luigi 'Comio' Mantellini wrote:
> > Hi ML,
> >
> > I'm evaluating the qemu-mips to simulate a mips 4kec/24kec board. I'm
> > working on the high level booting sequence (linux init scripts), and
> > qemu+uboot should be a good choice to emulate a basic system (flash +
> > dram + 4kec cpu).
> >
> > Furthermore, also following the doc/README.qemu_mips, I'm not able to see
> > the u-boot prompt on my qemu because the flash is not recognized. I
> > haven't experience with qemu-mips and I don't understand where the flash
> > is placed (canonical 0xbfxxxx address?) and how it is managed. Reading
> > the configs/qemu_mips.h, It seems that the flash is managed as a common
> > CFI flash placed to 0xbfc00000 address... but u-boot shows always
> > "Unknown FLASH on Bank 1" on startup.
> >
> > Has anyone tried to use qemu-mips to boot a standard u-boot image
> > (qemu_mips target on u-boot)?
> >
> >
> > Thanks for any suggestion.
> >
> > luigi
> >
> > ########### Useful Infos ############
> >
> > This is the qemu banner (on Ubuntu 8.10):
> >
> > EMU PC emulator version 0.9.1, Copyright (c) 2003-2008 Fabrice Bellard
>
> Please use the SVN version of qemu for the current u-boot version
>
> I'll update the README.qemu_mips to specify the last u-boot version for the
> old qemu
>
> Best Regards,
> J.
--
Luigi Mantellini
R&D - Software
Industrie Dial Face S.p.A.
Via Canzo, 4
20068 Peschiera Borromeo (MI), Italy
Tel.: +39 02 5167 2813
Fax: +39 02 5167 2459
Email: luigi.mantell...@idf-hit.com
Index: hw/mips_r4k.c
===================================================================
--- hw/mips_r4k.c (revision 6436)
+++ hw/mips_r4k.c (working copy)
@@ -16,7 +16,10 @@
#include "boards.h"
#include "flash.h"
#include "qemu-log.h"
+#include "block_int.h"
+#include <sys/stat.h>
+
#ifdef TARGET_WORDS_BIGENDIAN
#define BIOS_FILENAME "mips_bios.bin"
#else
@@ -205,10 +208,16 @@
cpu_register_physical_memory(0x1fc00000,
BIOS_SIZE, bios_offset | IO_MEM_ROM);
} else if ((index = drive_get_index(IF_PFLASH, 0, 0)) > -1) {
+ struct stat infobuf; /* place to store info */
uint32_t mips_rom = 0x00400000;
- cpu_register_physical_memory(0x1fc00000, mips_rom,
+
+ if (stat(drives_table[index].bdrv->filename, &infobuf) == 0) {
+ mips_rom = infobuf.st_size;
+ }
+
+ cpu_register_physical_memory(0x20000000 - mips_rom, mips_rom,
qemu_ram_alloc(mips_rom) | IO_MEM_ROM);
- if (!pflash_cfi01_register(0x1fc00000, qemu_ram_alloc(mips_rom),
+ if (!pflash_cfi01_register(0x20000000 - mips_rom, qemu_ram_alloc(mips_rom),
drives_table[index].bdrv, sector_len, mips_rom / sector_len,
4, 0, 0, 0, 0)) {
fprintf(stderr, "qemu: Error registering flash memory.\n");
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