On 26/10/22 23:32, Bernhard Beschow wrote:
On Wed, Oct 26, 2022 at 9:46 PM Philippe Mathieu-Daudé
<phi...@linaro.org <mailto:phi...@linaro.org>> wrote:
IRQRC[A:D] registers reset value is 0x80. We were forcing
the MIPS Malta machine routing to be able to boot a Linux
kernel without any bootloader.
We now have these registers initialized in the Malta machine
write_bootloader(), so we can use the correct reset values.
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org
<mailto:phi...@linaro.org>>
---
hw/isa/piix4.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index 15f344dbb7..a2165c6a49 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -115,10 +115,10 @@ static void piix4_isa_reset(DeviceState *dev)
pci_conf[0x4c] = 0x4d;
pci_conf[0x4e] = 0x03;
pci_conf[0x4f] = 0x00;
- pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
- pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
- pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
- pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
+ pci_conf[0x60] = 0x80;
+ pci_conf[0x61] = 0x80;
+ pci_conf[0x62] = 0x80;
+ pci_conf[0x63] = 0x80;
Running `qemu-system-mips64el -M malta -kernel vmlinux-3.2.0-4-5kc-malta
-hda debian_wheezy_mipsel_standard.qcow2 -append "root=/dev/sda1
console=ttyS0"` with this patch Linux outputs:
[ 7.944000] uhci_hcd: USB Universal Host Controller Interface driver
[ 7.944000] uhci_hcd 0000:00:0a.2: Found HC with no IRQ. Check
BIOS/PCI 0000:00:0a.2 setup!
[ 7.944000] uhci_hcd 0000:00:0a.2: init 0000:00:0a.2 fail, -19
Omitting this patch from the series the USB host is found.
Oh, I should have used tswap() instead of bswap()! I have been moving
and my test suite is on an offline backup, I'm not yet set up. As you
see my testing is poor :/
