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#include <console/console.h>
#include <arch/pirq_routing.h>
#include <string.h>
#include <device/pci.h>
#ifndef CONFIG_IRQ_SLOT_COUNT
#warning "CONFIG_IRQ_SLOT_COUNT is not defined. PIRQ won't work correctly."
#endif
#if CONFIG_DEBUG
static void check_pirq_routing_table(struct irq_routing_table *rt)
{
uint8_t *addr = (uint8_t *)rt;
uint8_t sum=0;
int i;
printk(BIOS_INFO, "Checking Interrupt Routing Table consistency...\n");
if (sizeof(struct irq_routing_table) != rt->size) {
printk(BIOS_WARNING, "Inconsistent Interrupt Routing Table size (0x%x/0x%x).\n",
sizeof(struct irq_routing_table),
rt->size
);
rt->size=sizeof(struct irq_routing_table);
}
for (i = 0; i < rt->size; i++)
sum += addr[i];
printk(BIOS_DEBUG, "%s(): Interrupt Routing Table located at %p.\n",
__func__, addr);
sum = rt->checksum - sum;
if (sum != rt->checksum) {
printk(BIOS_WARNING, "Interrupt Routing Table checksum is: 0x%02x but should be: 0x%02x.\n",
rt->checksum, sum);
rt->checksum = sum;
}
if (rt->signature != PIRQ_SIGNATURE || rt->version != PIRQ_VERSION ||
rt->size % 16 ) {
printk(BIOS_WARNING, "Interrupt Routing Table not valid.\n");
return;
}
sum = 0;
for (i=0; i<rt->size; i++)
sum += addr[i];
/* We're manually fixing the checksum above. This warning can probably
* never happen because if the target location is read-only this
* function would have bailed out earlier.
*/
if (sum) {
printk(BIOS_WARNING, "Checksum error in Interrupt Routing Table "
"could not be fixed.\n");
}
printk(BIOS_INFO, "done.\n");
}
static int verify_copy_pirq_routing_table(unsigned long addr)
{
int i;
uint8_t *rt_orig, *rt_curr;
rt_curr = (uint8_t*)addr;
rt_orig = (uint8_t*)&intel_irq_routing_table;
printk(BIOS_INFO, "Verifing copy of Interrupt Routing Table at 0x%08x... ", addr);
for (i = 0; i < intel_irq_routing_table.size; i++) {
if (*(rt_curr + i) != *(rt_orig + i)) {
printk(BIOS_INFO, "failed\n");
return -1;
}
}
printk(BIOS_INFO, "done\n");
check_pirq_routing_table((struct irq_routing_table *)addr);
return 0;
}
#endif
unsigned long copy_pirq_routing_table(unsigned long addr)
{
/* Align the table to be 16 byte aligned. */
addr += 15;
addr &= ~15;
/* This table must be betweeen 0xf0000 & 0x100000 */
printk(BIOS_INFO, "Copying Interrupt Routing Table to 0x%08lx... ", addr);
memcpy((void *)addr, &intel_irq_routing_table, intel_irq_routing_table.size);
printk(BIOS_INFO, "done.\n");
#if CONFIG_DEBUG
verify_copy_pirq_routing_table(addr);
#endif
pirq_routing_irqs(addr);
return addr + intel_irq_routing_table.size;
}
#if CONFIG_PIRQ_ROUTE
void pirq_routing_irqs(unsigned long addr)
{
int i, j, k, num_entries;
unsigned char irq_slot[4];
unsigned char pirq[4] = {0, 0, 0, 0};
struct irq_routing_table *pirq_tbl;
pirq_tbl = (struct irq_routing_table *)(addr);
num_entries = (pirq_tbl->size - 32) / 16;
/* Set PCI IRQs. */
for (i = 0; i < num_entries; i++) {
printk(BIOS_DEBUG, "PIRQ Entry %d Dev/Fn: %X Slot: %d\n", i,
pirq_tbl->slots[i].devfn >> 3, pirq_tbl->slots[i].slot);
for (j = 0; j < 4; j++) {
int link = pirq_tbl->slots[i].irq[j].link;
int bitmap = pirq_tbl->slots[i].irq[j].bitmap;
int irq = 0;
printk(BIOS_DEBUG, "INT: %c link: %x bitmap: %x ",
'A' + j, link, bitmap);
if (!bitmap|| !link || link > 4) {
printk(BIOS_DEBUG, "not routed\n");
irq_slot[j] = irq;
continue;
}
/* yet not routed */
if (!pirq[link - 1]) {
for (k = 2; k <= 15; k++) {
if (!((bitmap >> k) & 1))
continue;
irq = k;
/* yet not routed */
if (pirq[0] != irq && pirq[1] != irq && pirq[2] != irq && pirq[3] != irq)
break;
}
if (irq)
pirq[link - 1] = irq;
}
else
irq = pirq[link - 1];
printk(BIOS_DEBUG, "IRQ: %d\n", irq);
irq_slot[j] = irq;
}
/* Bus, device, slots IRQs for {A,B,C,D}. */
pci_assign_irqs(pirq_tbl->slots[i].bus,
pirq_tbl->slots[i].devfn >> 3, irq_slot);
}
printk(BIOS_DEBUG, "PIRQ1: %d\n", pirq[0]);
printk(BIOS_DEBUG, "PIRQ2: %d\n", pirq[1]);
printk(BIOS_DEBUG, "PIRQ3: %d\n", pirq[2]);
printk(BIOS_DEBUG, "PIRQ4: %d\n", pirq[3]);
pirq_assign_irqs(pirq);
}
#endif
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