diff options
| author | Bernhard M. Wiedemann <qemudevbmw@lsmod.de> | 2010-04-20 20:48:06 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2010-05-03 16:03:19 -0500 |
| commit | ec5f92ce6ac8ec09056be77e03c941be188648fa (patch) | |
| tree | dc815e2c9d68798d43e62bcde22ce6cc20d2d07e /hw/piix_pci.c | |
| parent | cb4e5f8ed1b648c451491b10dc92b1af1e324535 (diff) | |
hw: better i440 emulation
updated version of an old patch
http://xenon.stanford.edu/~eswierk/misc/qemu-linuxbios/qemu-piix-ram-size.patch
that together with
http://www.mail-archive.com/linuxbios@linuxbios.org/msg02390.html
(which is already in coreboot trunk) allows coreboot to autodetect the amount of RAM within qemu/kvm from a register in i440 northbridge.
The message on the old patch states:
Unfortunately the current version of qemu does not set these
registers, but I have patched qemu so that it emulates the i440 more
faithfully in this regard.
Signed-off-by: Bernhard M. Wiedemann <qemudevbmw@lsmod.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/piix_pci.c')
| -rw-r--r-- | hw/piix_pci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/hw/piix_pci.c b/hw/piix_pci.c index cd12212fff..97519dbb5f 100644 --- a/hw/piix_pci.c +++ b/hw/piix_pci.c @@ -213,7 +213,7 @@ static int i440fx_initfn(PCIDevice *dev) return 0; } -PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic) +PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic, int ram_size) { DeviceState *dev; PCIBus *b; @@ -238,6 +238,11 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq * *piix3_devfn = piix3->dev.devfn; + ram_size = ram_size / 8 / 1024 / 1024; + if (ram_size > 255) + ram_size = 255; + (*pi440fx_state)->dev.config[0x57]=ram_size; + return b; } |