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[v5,03/31] hw/isa/piix4: Correct IRQRC[A:D] reset values

Message ID 20230105143228.244965-4-shentey@gmail.com
State Superseded
Headers show
Series [v5,01/31] hw/mips/malta: Introduce PIIX4_PCI_DEVFN definition | expand

Commit Message

Bernhard Beschow Jan. 5, 2023, 2:32 p.m. UTC 
From: Philippe Mathieu-Daudé <philmd@linaro.org>

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 <philmd@linaro.org>
Message-Id: <20221027204720.33611-4-philmd@linaro.org>
---
 hw/isa/piix4.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index eca96fb8f0..6e9434129d 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -91,10 +91,10 @@  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;
     pci_conf[0x69] = 0x02;
     pci_conf[0x70] = 0x80;
     pci_conf[0x76] = 0x0c;