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authorRonald G. Minnich <rminnich@gmail.com>2006-06-18 01:29:42 +0000
committerRonald G. Minnich <rminnich@gmail.com>2006-06-18 01:29:42 +0000
commit48415d5cf6f317aa7d7c30623ed2b36b29710d8e (patch)
tree668f34c1d99efa100900a856a7238c259be42607 /src/northbridge
parent6ab0fa9fedbfd3f0b21b84aed280bc8971ea324f (diff)
add irq mapper support for OLPC and other boards that need this mapping
done for the gx2 north. tested on OLPC. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2323 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/gx2/chip.h1
-rw-r--r--src/northbridge/amd/gx2/northbridge.c28
2 files changed, 28 insertions, 1 deletions
diff --git a/src/northbridge/amd/gx2/chip.h b/src/northbridge/amd/gx2/chip.h
index 4e7ac3c1d7..46e6ae87be 100644
--- a/src/northbridge/amd/gx2/chip.h
+++ b/src/northbridge/amd/gx2/chip.h
@@ -1,5 +1,6 @@
struct northbridge_amd_gx2_config
{
+ uint16_t irqmap;
};
extern struct chip_operations northbridge_amd_gx2_ops;
diff --git a/src/northbridge/amd/gx2/northbridge.c b/src/northbridge/amd/gx2/northbridge.c
index fca31979dd..c52277a95a 100644
--- a/src/northbridge/amd/gx2/northbridge.c
+++ b/src/northbridge/amd/gx2/northbridge.c
@@ -169,7 +169,7 @@ setup_gx2_cache(void)
void
setup_gx2(void)
{
- int i;
+
unsigned long tmp, tmp2;
msr_t msr;
unsigned long size_kb, membytes;
@@ -417,11 +417,36 @@ static struct device_operations cpu_bus_ops = {
void chipsetInit (void);
+/* note that dev is NOT used -- yet */
+static void irq_init(struct device *dev, uint16_t irq_map) {
+
+ /* Set up IRQ steering */
+ uint32_t pciAddr = 0x80000000 | (CHIPSET_DEV_NUM << 11) | 0x5C;
+
+ printk_debug("OLPC REVA ENTER %s\n", __FUNCTION__);
+
+ /* The IRQ steering values (in hex) are effectively dcba, where:
+ * <a> represents the IRQ for INTA,
+ * <b> represents the IRQ for INTB,
+ * <c> represents the IRQ for INTC, and
+ * <d> represents the IRQ for INTD.
+ * Thus, a value of irq_map = 0xAA5B translates to:
+ * INTA = IRQB (IRQ 11)
+ * INTB = IRQ5 (IRQ 5)
+ * INTC = IRQA (IRQ 10)
+ * INTD = IRQA (IRQ 10)
+ */
+ outl(pciAddr & ~3, 0xCF8);
+ outl(irq_map, 0xCFC);
+}
+
+
static void enable_dev(struct device *dev)
{
printk_debug("gx2 north: enable_dev\n");
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
+ struct northbridge_amd_gx2_config *nb = (struct northbridge_amd_gx2_config *)dev->chip_info;
extern void cpubug(void);
printk_debug("DEVICE_PATH_PCI_DOMAIN\n");
/* cpubug MUST be called before setup_gx2(), so we force the issue here */
@@ -432,6 +457,7 @@ static void enable_dev(struct device *dev)
/* do this here for now -- this chip really breaks our device model */
setup_realmode_idt();
do_vsmbios();
+ irq_init(dev, nb->irqmap);
graphics_init();
dev->ops = &pci_domain_ops;
pci_set_method(dev);