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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
This commit is contained in:
Ronald G. Minnich 2006-06-18 01:29:42 +00:00
parent 6ab0fa9fed
commit 48415d5cf6
3 changed files with 29 additions and 1 deletions
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1
src/mainboard/olpc/rev_a/Config.lb
View File

@ -124,6 +124,7 @@ dir /pc80
config chip.h
chip northbridge/amd/gx2
register "irq_map" = "0xaa5b";
device apic_cluster 0 on
chip cpu/amd/model_gx2
device apic 0 on end

1
src/northbridge/amd/gx2/chip.h
View File

@ -1,5 +1,6 @@
struct northbridge_amd_gx2_config
{
uint16_t irqmap;
};
extern struct chip_operations northbridge_amd_gx2_ops;

28
src/northbridge/amd/gx2/northbridge.c
View File

@ -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);