[Qemu-devel] [PATCH] Add support to sparc for loading a real bios image.
Add support to sparc for loading a real bios image.
Index: hw/sun4m.c
===
RCS file: /sources/qemu/qemu/hw/sun4m.c,v
retrieving revision 1.52
diff -p -u -r1.52 sun4m.c
--- hw/sun4m.c 5 Oct 2007 13:08:35 - 1.52
+++ hw/sun4m.c 6 Oct 2007 00:05:16 -
@@ -49,7 +49,7 @@
#define KERNEL_LOAD_ADDR 0x4000
#define CMDLINE_ADDR 0x007ff000
#define INITRD_LOAD_ADDR 0x0080
-#define PROM_SIZE_MAX(256 * 1024)
+#define PROM_SIZE_MAX(512 * 1024)
#define PROM_PADDR 0xff000ULL
#define PROM_VADDR 0xffd0
#define PROM_FILENAME "openbios-sparc32"
@@ -435,9 +435,12 @@ static void sun4m_load_kernel(long vram_
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
ret = load_elf(buf, PROM_PADDR - PROM_VADDR, NULL, NULL, NULL);
if (ret < 0) {
- fprintf(stderr, "qemu: could not load prom '%s'\n",
+ret = load_image(buf, phys_ram_base + prom_offset);
+ if (ret < 0) {
+ fprintf(stderr, "qemu: could not load prom '%s'\n",
buf);
- exit(1);
+ exit(1);
+ }
}
kernel_size = 0;
[Qemu-devel] qemu/target-ppc cpu.h helper.c op.c translate.c...
CVSROOT:/sources/qemu Module name:qemu Changes by: Jocelyn Mayer 07/10/05 22:06:02 Modified files: target-ppc : cpu.h helper.c op.c translate.c translate_init.c Log message: Full implementation of PowerPC 64 MMU, just missing support for 1 TB memory segments. Remove the PowerPC 64 "bridge" MMU model and implement segment registers emulation using SLB entries instead. Make SLB area size implementation dependant. Improve TLB & SLB search debug traces. Temporary hack to make PowerPC 970 boot from ROM instead of RAM. CVSWeb URLs: http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/cpu.h?cvsroot=qemu&r1=1.72&r2=1.73 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/helper.c?cvsroot=qemu&r1=1.68&r2=1.69 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/op.c?cvsroot=qemu&r1=1.53&r2=1.54 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/translate.c?cvsroot=qemu&r1=1.85&r2=1.86 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/translate_init.c?cvsroot=qemu&r1=1.42&r2=1.43
Re: [Qemu-devel] qemu/pc-bios ppc_rom.bin
Hi all, Just to resume, I'm in position with Fabrice, Thiemo and Jocelyn. And, to note. Current BIOS are very bloated assembler hacks that everytime I use them make me think "miracle, it POSTs!" No way, in a far far away galaxy, there was a simple BIOS, that WONT RUN UNDER QEMU. Why? Timing? Doesn't matter to it. Strange hardware bugs? Too early for ever knowing they were there. Source available? Yes, it is, I don't know the license, but Compaq used it to make the cloned BIOS, so we should be able to use it to make QEMU able to POST-It (trademark lol) And if any firmware wants to be an alternative open-source firmware it should meet the following requirements: 1.- Be able to boot, unmodified, in real hardware (REAL!) 2.- Be able to boot the same operating systems a closed-source firmware for that platform will be. (in REAL hardware) It is desiderable for QEMU, no way, IT IS A MUST FOR QEMU, to be able to boot real firmware that boots in the real hardware QEMU is emulating. (That is, if QEMU emulates a PIIX4 with Pentium II, it must support booting a BIOS for P2+PIIX4, but must not support booting a BIOS for a Athlon+nForce) And, extrapolate what I say to PowerPC, MIPS, ARM, Alpha, Sparc, so on! Regards, Natalia Portillo - Original Message - From: "Thiemo Seufer" <[EMAIL PROTECTED]> To: "Blue Swirl" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]>; Sent: Monday, October 01, 2007 10:57 PM Subject: Re: [Qemu-devel] qemu/pc-bios ppc_rom.bin Blue Swirl wrote: [snip] > > Qemu is not also aimed for 100% accurate emulation of the hardware. > > There are no caches or cycle counters and hardware devices run > > unrealistically fast from CPU standpoint. Emulating performance > > counters or the errata the most CPUs have would be extremely > > difficult. I doubt Qemu CPU emulation can ever pass POST of real > > BIOSes. > > I am working on making the Malta emulation boot a unaltered YAMON > image. I don't see why a PC BIOS would be harder to accomodate. Emulating microcode, or firmware blobs loaded to misc devices. Think writing a BIOS for Transmeta, Writing the emulation for a transmeta is IMHO more challenging than writing the "BIOS". Btw, if you are interested in the x86 mode, you can handle the transmeta just as a x86 variant (with a much more standard BIOS). Alpha or a SoC. Writing "Firmware for a SoC" is part of my dayjob. > > Real BIOSes are also closed source, proprietary binary blobs. > > At least YAMON, CFE and PMON are not closed source. YAMON has a funny > license which - I hope - will change. > > > Making open source BIOSes a viable alternative is in my opinion a > > much > > more important goal. > > The one doesn't exclude the other. That said, I regard the ability to > boot unaltered real-world firmare as an important test of the quality > of a system emulation. Maybe. The CPU probes for cacheline size, checks for errata #42 vs #45, reads debug registers, attempts to identify the bus speed by comparing I/O access times, tries to verify the system using a TPM and fails all cases. What can you do? Improve the emulation to handle at least one probing path. Thiemo
[Qemu-devel] qemu/linux-user main.c qemu.h signal.c
CVSROOT:/cvsroot/qemu Module name:qemu Changes by: Blue Swirl 07/10/05 17:01:51 Modified files: linux-user : main.c qemu.h signal.c Log message: Implement sparc64_[gs]et_context CVSWeb URLs: http://cvs.savannah.gnu.org/viewcvs/qemu/linux-user/main.c?cvsroot=qemu&r1=1.127&r2=1.128 http://cvs.savannah.gnu.org/viewcvs/qemu/linux-user/qemu.h?cvsroot=qemu&r1=1.37&r2=1.38 http://cvs.savannah.gnu.org/viewcvs/qemu/linux-user/signal.c?cvsroot=qemu&r1=1.44&r2=1.45
[Qemu-devel] qemu/target-ppc cpu.h translate_init.c
CVSROOT:/sources/qemu Module name:qemu Changes by: Jocelyn Mayer 07/10/05 13:11:25 Modified files: target-ppc : cpu.h translate_init.c Log message: Rename PowerPC MMUCSR0 and MMUCFG SPRs: those are not BookE specific. CVSWeb URLs: http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/cpu.h?cvsroot=qemu&r1=1.71&r2=1.72 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/translate_init.c?cvsroot=qemu&r1=1.41&r2=1.42
[Qemu-devel] qemu/target-ppc helper.c translate_init.c
CVSROOT:/sources/qemu Module name:qemu Changes by: Jocelyn Mayer 07/10/05 13:09:55 Modified files: target-ppc : helper.c translate_init.c Log message: PowerPC hardware reset vector is now considered as part of the exception model. Use it at CPU initialisation time. CVSWeb URLs: http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/helper.c?cvsroot=qemu&r1=1.67&r2=1.68 http://cvs.savannah.gnu.org/viewcvs/qemu/target-ppc/translate_init.c?cvsroot=qemu&r1=1.40&r2=1.41
[Qemu-devel] qemu vl.c vl.h hw/mips_malta.c hw/mips_pica61.c...
CVSROOT:/sources/qemu Module name:qemu Changes by: Jocelyn Mayer 07/10/05 13:08:35 Modified files: . : vl.c vl.h hw : mips_malta.c mips_pica61.c mips_r4k.c pc.c ppc405_boards.c ppc_chrp.c ppc_prep.c shix.c sun4m.c sun4u.c Log message: New '-bios' option, used to select an alternate BIOS image from bios_dir. CVSWeb URLs: http://cvs.savannah.gnu.org/viewcvs/qemu/vl.c?cvsroot=qemu&r1=1.345&r2=1.346 http://cvs.savannah.gnu.org/viewcvs/qemu/vl.h?cvsroot=qemu&r1=1.273&r2=1.274 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/mips_malta.c?cvsroot=qemu&r1=1.44&r2=1.45 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/mips_pica61.c?cvsroot=qemu&r1=1.8&r2=1.9 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/mips_r4k.c?cvsroot=qemu&r1=1.47&r2=1.48 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/pc.c?cvsroot=qemu&r1=1.85&r2=1.86 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/ppc405_boards.c?cvsroot=qemu&r1=1.6&r2=1.7 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/ppc_chrp.c?cvsroot=qemu&r1=1.43&r2=1.44 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/ppc_prep.c?cvsroot=qemu&r1=1.43&r2=1.44 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/shix.c?cvsroot=qemu&r1=1.4&r2=1.5 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/sun4m.c?cvsroot=qemu&r1=1.51&r2=1.52 http://cvs.savannah.gnu.org/viewcvs/qemu/hw/sun4u.c?cvsroot=qemu&r1=1.20&r2=1.21
Re: [Qemu-devel] RFC: cleanups in ELF loader
On Thu, 2007-10-04 at 12:20 +0100, Thiemo Seufer wrote: > J. Mayer wrote: > [snip] > > The thing I see is different is that the n32 ABI redefines elf_greg_t > > and elf_caddr_t as 32 bits. Maybe I missed something but those types > > seem not to be used by the ELF loader (or maybe I should look in a more > > recent kernel ;-) ). > > Then, I have seen no apparent issue with the patch and I'm quite sure > > that, even if it's not correct for some specific ABI, it would bring no > > regression. > > Agreed. I'd really like to have the though of ARM developpers about it But if no one seem to report potential issues, I'll commit it. -- J. Mayer <[EMAIL PROTECTED]> Never organized
Re: [Qemu-devel] RFC: BIOS filename option
On Thu, 2007-10-04 at 12:38 +0100, Thiemo Seufer wrote: > J. Mayer wrote: > > Hi, > > > > This is a proposal to allow the user to select a BIOS file name on the > > command line. The goal is mainly to ease debug, for example when I want > > to try to run a firmware comming from a real machine instead of the > > default one. > > The only change is to add a -bios option, use the given file > > if any or use the default if none were given. > > Maybe the options would be better named as -biosfile Or it maybe a > > good idea to give a full path, not to concatenate the given name with > > the bios_dir prefix... > > Some may find this option is not so useful, as one can specify a > > directory to find the target BIOS. But I feel more confortable keeping > > all BIOS images together at the same place. > > I welcome this, especially since the various mips machine emulations > may have several alternative BIOS implementations soon. Hi, OK, I will apply this soon. -- J. Mayer <[EMAIL PROTECTED]> Never organized
