Add the AMD DB800 (AKA Salsa) mainboard.

The DB800 is the AMD LX Reference Design Kit platform.
For details see: http://www.amd.com/geodelxdb800

Signed-off-by: Marc Jones <marc.jones@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2718 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 106 insertions, 0 deletions

diff --git a/src/mainboard/amd/db800/irq_tables.c b/src/mainboard/amd/db800/irq_tables.c
new file mode 100644
index 0000000000..a5e13cd05a
--- /dev/null
+++ b/src/mainboard/amd/db800/irq_tables.c
@@ -0,0 +1,106 @@
+/*
+ * This file is part of the LinuxBIOS project.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <arch/pirq_routing.h>
+#include <console/console.h>
+#include <arch/io.h>
+#include <arch/pirq_routing.h>
+#include "../../../southbridge/amd/cs5536/cs5536.h"
+
+/* Platform IRQs */
+#define PIRQA 10
+#define PIRQB 11
+#define PIRQC 10
+#define PIRQD 11
+
+/* Map */
+#define M_PIRQA (1 << PIRQA)	/* Bitmap of supported IRQs */
+#define M_PIRQB (1 << PIRQB)	/* Bitmap of supported IRQs */
+#define M_PIRQC (1 << PIRQC)	/* Bitmap of supported IRQs */
+#define M_PIRQD (1 << PIRQD)	/* Bitmap of supported IRQs */
+
+/* Link */
+#define L_PIRQA	 1		/* Means Slot INTx# Connects To Chipset INTA# */
+#define L_PIRQB	 2		/* Means Slot INTx# Connects To Chipset INTB# */
+#define L_PIRQC	 3		/* Means Slot INTx# Connects To Chipset INTC# */
+#define L_PIRQD	 4		/* Means Slot INTx# Connects To Chipset INTD# */
+
+const struct irq_routing_table intel_irq_routing_table = {
+	PIRQ_SIGNATURE,		/* u32 signature */
+	PIRQ_VERSION,		/* u16 version   */
+	32 + 16 * IRQ_SLOT_COUNT,	/* there can be total 6 devices on the bus */
+	0x00,			/* Where the interrupt router lies (bus) */
+	(0x0F << 3) | 0x0,	/* Where the interrupt router lies (dev) */
+	0x00,			/* IRQs devoted exclusively to PCI usage */
+	0x100B,			/* Vendor */
+	0x002B,			/* Device */
+	0,			/* Crap (miniport) */
+	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},	/* u8 rfu[11] */
+	0x00,			/*      u8 checksum , this has to set to some value that would give 0 after the sum of all bytes for this structure (including checksum) */
+	{
+	 /* If you change the number of entries, change the IRQ_SLOT_COUNT above! */
+	 /* bus, dev|fn,           {link, bitmap},      {link, bitmap},     {link, bitmap},     {link, bitmap},     slot, rfu */
+	 {0x00, (0x01 << 3) | 0x0, {{L_PIRQA, M_PIRQA}, {0x00, 0x00}, {0x00, 0x00}, {0x00, 0x00}}, 0x0, 0x0},	/* cpu */
+	 {0x00, (0x0F << 3) | 0x0, {{L_PIRQA, M_PIRQA}, {L_PIRQB, M_PIRQB}, {L_PIRQC, M_PIRQC}, {L_PIRQD, M_PIRQD}}, 0x0, 0x0},	/* chipset */
+	 {0x00, (0x0D << 3) | 0x0, {{L_PIRQB, M_PIRQB}, {0x00, 0x00}, {0x00, 0x00}, {0x00, 0x00}}, 0x0, 0x0},	/* ethernet */
+	 {0x00, (0x0E << 3) | 0x0, {{L_PIRQC, M_PIRQC}, {L_PIRQD, M_PIRQD}, {L_PIRQA, M_PIRQA}, {L_PIRQB, M_PIRQB}}, 0x1, 0x0},	/* slot1 */
+	 }
+};
+
+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;
+}