Add support for A-Open DXPL Plus-U motherboard

This is an old (pre-2005) entry-level server mainboard. The code
is adapted from mainboard/intel/xe7501devkit.

Featured chips:
 - Dual socket604
 - E7505 northbridge
 - 82801DB southbridge (with EHCI debug port)
 - 82870p2 PCI-X bridge
 - LPC47M102S-MC super-io
 - 512kB FWH flash (flashrom does the job well)

What works:
 - Dual-Xeon P4/HT boot with microcode update
 - RAM: registered ECC DDR266 in dual-channel
 - PCI-X slot interrupts with ACPI and I/O apic
 - On-board PCI-X GbE and SCSI
 - ACPI power-off and wakeup with PME#

Notes :
 - Current ACPI is more or less a mess
 - Interrupts do not route correctly with PIRQ
 - MP-table is not implemented
 - Issues with reboots remain (cold and warm)
 - Many superio devices are disabled by default
 - Audio codec is not investigated

Change-Id: I02d18c83f485a09ada65dde03bcc86e9163f2011
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/303
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 163 insertions, 0 deletions

diff --git a/src/mainboard/aopen/dxplplusu/acpi_tables.c b/src/mainboard/aopen/dxplplusu/acpi_tables.c
new file mode 100644
index 0000000000..b7c789a55b
--- /dev/null
+++ b/src/mainboard/aopen/dxplplusu/acpi_tables.c
@@ -0,0 +1,163 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Written by Stefan Reinauer <stepan@openbios.org>
+ *  (C) 2005 Stefan Reinauer
+ *  (C) 2005 Digital Design Corporation
+ *
+ * Ported to Intel XE7501DEVKIT by Agami Aruma
+ * Ported to AOpen DXPL Plus-U by Kyösti Mälkki
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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 <console/console.h>
+#include <string.h>
+#include <arch/acpi.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <assert.h>
+#include "bus.h"
+
+extern unsigned char AmlCode[];
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+	/* Just a dummy */
+	return current;
+}
+
+unsigned long acpi_fill_slit(unsigned long current)
+{
+	// Not implemented
+	return current;
+}
+
+unsigned long acpi_fill_srat(unsigned long current)
+{
+	// Not implemented
+	return current;
+}
+
+unsigned long acpi_fill_madt(unsigned long current)
+{
+	unsigned int irq_start = 0;
+	device_t dev = 0;
+	struct resource* res = NULL;
+
+	// SJM: Hard-code CPU LAPIC entries for now
+	current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 0, 0);
+	current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 1, 6);
+	current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 2, 1);
+	current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 3, 7);
+
+	// Southbridge IOAPIC
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current, IOAPIC_ICH4, 0xfec00000, irq_start);
+	irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
+
+	// P64H2 Bus B IOAPIC
+	dev = dev_find_slot(PCI_BUS_E7501_HI_B, PCI_DEVFN(28, 0));
+	if (!dev)
+		BUG();		// Config.lb error?
+	res = find_resource(dev, PCI_BASE_ADDRESS_0);
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current, IOAPIC_P64H2_BUS_B, res->base, irq_start);
+	irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
+
+	// P64H2 Bus A IOAPIC
+	dev = dev_find_slot(PCI_BUS_E7501_HI_B, PCI_DEVFN(30, 0));
+	if (!dev)
+		BUG();		// Config.lb error?
+	res = find_resource(dev, PCI_BASE_ADDRESS_0);
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current, IOAPIC_P64H2_BUS_A, res->base, irq_start);
+	irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
+
+
+	// Map ISA IRQ 0 to IRQ 2
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 1, 0, 2, 0);
+
+	// IRQ9 differs from ISA standard - ours is active high, level-triggered
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 0, 9, 9, 0xD);
+
+	return current;
+}
+
+#define ALIGN_CURRENT current = ((current + 0x0f) & -0x10)
+unsigned long write_acpi_tables(unsigned long start)
+{
+	unsigned long current;
+	acpi_rsdp_t *rsdp;
+	acpi_rsdt_t *rsdt;
+	acpi_madt_t *madt;
+	acpi_facs_t *facs;
+	acpi_fadt_t *fadt;
+	acpi_header_t *dsdt;
+
+	current = start;
+
+	/* Align ACPI tables to 16byte */
+	ALIGN_CURRENT;
+
+	printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx...\n", start);
+
+	/* We need at least an RSDP and an RSDT Table */
+	rsdp = (acpi_rsdp_t *) current;
+	current += sizeof(acpi_rsdp_t);
+	ALIGN_CURRENT;
+	rsdt = (acpi_rsdt_t *) current;
+	current += sizeof(acpi_rsdt_t);
+	ALIGN_CURRENT;
+
+	/* clear all table memory */
+	memset((void *)start, 0, current - start);
+
+	acpi_write_rsdp(rsdp, rsdt, NULL);
+	acpi_write_rsdt(rsdt);
+
+	/*
+	 * We explicitly add these tables later on:
+	 */
+	printk(BIOS_DEBUG, "ACPI:     * FADT\n");
+	fadt = (acpi_fadt_t *) current;
+	current += sizeof(acpi_fadt_t);
+	ALIGN_CURRENT;
+
+	printk(BIOS_DEBUG, "ACPI:     * FACS\n");
+	facs = (acpi_facs_t *) current;
+	current += sizeof(acpi_facs_t);
+	ALIGN_CURRENT;
+	acpi_create_facs(facs);
+
+	dsdt = (acpi_header_t *)current;
+	memcpy(dsdt,(void *)AmlCode, sizeof(acpi_header_t));
+	current += dsdt->length;
+	ALIGN_CURRENT;
+	memcpy(dsdt,(void *)AmlCode, dsdt->length);
+	dsdt->checksum = 0;
+	dsdt->checksum = acpi_checksum((void *)dsdt,dsdt->length);
+	printk(BIOS_DEBUG, "ACPI:     * DSDT @ %p Length %x\n",dsdt,dsdt->length);
+
+	acpi_create_fadt(fadt,facs,dsdt);
+	acpi_add_table(rsdp,fadt);
+
+	printk(BIOS_DEBUG, "ACPI:    * MADT\n");
+	madt = (acpi_madt_t *) current;
+	acpi_create_madt(madt);
+	current+=madt->header.length;
+	ALIGN_CURRENT;
+	acpi_add_table(rsdp,madt);
+
+	printk(BIOS_INFO, "ACPI: done.\n");
+	return current;
+}
+