Now coreboot performs IRQ routing for some boards.

You can see this by executing commands like this:
grep -r pci_assign_irqs coreboot/src/*

This basically AMD/LX based boards: pcengines/alix1c,
digitallogic/msm800sev, artecgroup/dbe61, amd/norwich, amd/db800.

Also for AMD/GX1 based boards need a patch
[http://www.pengutronix.de/software/ptxdist/temporary-src/references/geode-5530.patch]
for the right IRQ setup.
AMD/GX1 based boards is: advantech/pcm-5820, asi/mb_5blmp, axus/tc320,
bcom/winnet100, eaglelion/5bcm, iei/nova4899r, iei/juki-511p.

I have two ideas.
1. Delete duplicate code from AMD/LX based boards.
2. Add IRQ routing for AMD/GX1 boards in coreboot.

The pirq.patch for IRQ routing logically consist from of two parts:

First part of pirq.patch independent from type chipsets and assign IRQ for
ever PCI device. It part based on AMD/LX write_pirq_routing_table() function.

Second part of pirq.patch depends of type chipset and set PIRQx lines
in interrupt router. This part supports only CS5530/5536 interrupt routers.

IRQ routing functionality is included through PIRQ_ROUTE in Config.lb.

Tested on iei/juki-511p(cs5530a), iei/pcisa-lx(cs5536) and also on
TeleVideo TC7020, see
http://www.coreboot.org/pipermail/coreboot/2007-December/027973.html.

Signed-off-by: Nikolay Petukhov <nikolay.petukhov@gmail.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3196 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

2 files changed, 3 insertions, 38 deletions

diff --git a/src/mainboard/amd/db800/Options.lb b/src/mainboard/amd/db800/Options.lb
index 6a0dc3f8c0..ef62ec3eec 100644
--- a/src/mainboard/amd/db800/Options.lb
+++ b/src/mainboard/amd/db800/Options.lb
@@ -48,6 +48,7 @@ uses CONFIG_VIDEO_MB
 uses USE_DCACHE_RAM
 uses DCACHE_RAM_BASE
 uses DCACHE_RAM_SIZE
+uses PIRQ_ROUTE
 
 ## ROM_SIZE is the size of boot ROM that this board will use.
 default ROM_SIZE  = 256*1024
@@ -84,6 +85,7 @@ default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
 ##
 default HAVE_PIRQ_TABLE=1
 default IRQ_SLOT_COUNT=4
+default PIRQ_ROUTE=1
 #object irq_tables.o
 
 ##
diff --git a/src/mainboard/amd/db800/irq_tables.c b/src/mainboard/amd/db800/irq_tables.c
index 9fcc5eb3b6..f9a6312fa8 100644
--- a/src/mainboard/amd/db800/irq_tables.c
+++ b/src/mainboard/amd/db800/irq_tables.c
@@ -65,42 +65,5 @@ const struct irq_routing_table intel_irq_routing_table = {
 
 unsigned long write_pirq_routing_table(unsigned long addr)
 {
-	int i, j, k, num_entries;
-	unsigned char pirq[4];
-	uint16_t chipset_irq_map;
-	uint32_t pciAddr, pirtable_end;
-	struct irq_routing_table *pirq_tbl;
-
-	pirtable_end = copy_pirq_routing_table(addr);
-
-	/* Set up chipset IRQ steering. */
-	pciAddr = 0x80000000 | (CHIPSET_DEV_NUM << 11) | 0x5C;
-	chipset_irq_map = (PIRQD << 12 | PIRQC << 8 | PIRQB << 4 | PIRQA);
-	printk_debug("%s(%08X, %04X)\n", __FUNCTION__, pciAddr,
-		     chipset_irq_map);
-	outl(pciAddr & ~3, 0xCF8);
-	outl(chipset_irq_map, 0xCFC);
-
-	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_debug("PIR Entry %d Dev/Fn: %X Slot: %d\n", i,
-			     pirq_tbl->slots[i].devfn, pirq_tbl->slots[i].slot);
-		for (j = 0; j < 4; j++) {
-			printk_debug("INT: %c bitmap: %x ", 'A' + j,
-				     pirq_tbl->slots[i].irq[j].bitmap);
-			for (k = 0; (!((pirq_tbl->slots[i].irq[j].bitmap >> k) & 1)) && (pirq_tbl->slots[i].irq[j].bitmap != 0); k++) ;	/* Finds lsb in bitmap to IRQ#. */
-			pirq[j] = k;
-			printk_debug("PIRQ: %d\n", k);
-		}
-
-		/* Bus, device, slots IRQs for {A,B,C,D}. */
-		pci_assign_irqs(pirq_tbl->slots[i].bus,
-				pirq_tbl->slots[i].devfn >> 3, pirq);
-	}
-
-	/* Put the PIR table in memory and checksum. */
-	return pirtable_end;
+	return copy_pirq_routing_table(addr);
 }