Instead of requiring users to modify qemu to allow writes to 0xc0000-0xfffff, have coreboot qemu support enable the memory range at startup.
Signed-off-by: Kevin O'Connor kevin@koconnor.net --- src/mainboard/emulation/qemu-x86/mainboard.c | 41 +++++++++++++++++++++----- 1 files changed, 33 insertions(+), 8 deletions(-)
diff --git a/src/mainboard/emulation/qemu-x86/mainboard.c b/src/mainboard/emulation/qemu-x86/mainboard.c index 7ab02d9..55fc5c3 100644 --- a/src/mainboard/emulation/qemu-x86/mainboard.c +++ b/src/mainboard/emulation/qemu-x86/mainboard.c @@ -10,15 +10,15 @@ /* not sure how these are routed in qemu */ static const unsigned char enetIrqs[4] = { 11, 0, 0, 0 };
-static void qemu_init(device_t dev) +static void qemu_nb_init(device_t dev) { - /* The VGA OPROM already lives at 0xc0000, - * force coreboot to use it. - */ - dev->on_mainboard = 1; - - /* Now do the usual initialization */ - pci_dev_init(dev); + // Map memory at 0xc0000 - 0xfffff + int i; + uint8_t v = pci_read_config8(dev, 0x59); + v |= 0x30; + pci_write_config8(dev, 0x59, v); + for (i=0; i<6; i++) + pci_write_config8(dev, 0x5a + i, 0x33);
/* This sneaked in here, because Qemu does not * emulate a SuperIO chip @@ -32,6 +32,31 @@ static void qemu_init(device_t dev) pci_assign_irqs(0, 3, enetIrqs); }
+static struct device_operations nb_operations = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = qemu_nb_init, + .ops_pci = 0, +}; + +static const struct pci_driver nb_driver __pci_driver = { + .ops = &nb_operations, + .vendor = 0x8086, + .device = 0x1237, +}; + +static void qemu_init(device_t dev) +{ + /* The VGA OPROM already lives at 0xc0000, + * force coreboot to use it. + */ + dev->on_mainboard = 1; + + /* Now do the usual initialization */ + pci_dev_init(dev); +} + static struct device_operations vga_operations = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources,