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

9 files changed, 979 insertions, 0 deletions

diff --git a/src/mainboard/amd/db800/Config.lb b/src/mainboard/amd/db800/Config.lb
new file mode 100644
index 0000000000..975def30c0
--- /dev/null
+++ b/src/mainboard/amd/db800/Config.lb
@@ -0,0 +1,189 @@
+##
+## Compute the location and size of where this firmware image
+## (linuxBIOS plus bootloader) will live in the boot rom chip.
+##
+if USE_FALLBACK_IMAGE
+	default ROM_SECTION_SIZE   = FALLBACK_SIZE
+	default ROM_SECTION_OFFSET = ( ROM_SIZE - FALLBACK_SIZE )
+else
+	default ROM_SECTION_SIZE   = ( ROM_SIZE - FALLBACK_SIZE )
+	default ROM_SECTION_OFFSET = 0
+end
+
+##
+## Compute the start location and size size of
+## The linuxBIOS bootloader.
+##
+
+default CONFIG_ROM_PAYLOAD_START = (0xffffffff - ROM_SIZE + ROM_SECTION_OFFSET + 1)
+default PAYLOAD_SIZE			= ( ROM_SECTION_SIZE - ROM_IMAGE_SIZE )
+
+##
+## Compute where this copy of linuxBIOS will start in the boot rom
+##
+default _ROMBASE	  = ( CONFIG_ROM_PAYLOAD_START + PAYLOAD_SIZE )
+
+##
+## Compute a range of ROM that can cached to speed up linuxBIOS,
+## execution speed.
+##
+## XIP_ROM_SIZE must be a power of 2.
+## XIP_ROM_BASE must be a multiple of XIP_ROM_SIZE
+##
+default XIP_ROM_SIZE=65536
+default XIP_ROM_BASE = ( _ROMBASE + ROM_IMAGE_SIZE - XIP_ROM_SIZE )
+
+
+##
+## Set all of the defaults for an x86 architecture
+##
+
+arch i386 end
+
+##
+## Build the objects we have code for in this directory.
+##
+
+driver mainboard.o
+
+if HAVE_PIRQ_TABLE
+	object irq_tables.o
+end
+
+if USE_DCACHE_RAM
+	#compile cache_as_ram.c to auto.inc
+	makerule ./cache_as_ram_auto.inc
+			depends "$(MAINBOARD)/cache_as_ram_auto.c option_table.h"
+			action "$(CC) -I$(TOP)/src -I. $(CPPFLAGS) $(MAINBOARD)/cache_as_ram_auto.c -Os -nostdinc -nostdlib -fno-builtin -Wall -c -S -o $@"
+			action "perl -e 's/.rodata/.rom.data/g' -pi $@"
+			action "perl -e 's/.text/.section .rom.text/g' -pi $@"
+	end
+end
+
+
+##
+## Build our 16 bit and 32 bit linuxBIOS entry code
+##
+mainboardinit cpu/x86/16bit/entry16.inc
+mainboardinit cpu/x86/32bit/entry32.inc
+ldscript /cpu/x86/16bit/entry16.lds
+ldscript /cpu/x86/32bit/entry32.lds
+
+##
+## Build our reset vector (This is where linuxBIOS is entered)
+##
+if USE_FALLBACK_IMAGE
+	mainboardinit cpu/x86/16bit/reset16.inc
+	ldscript /cpu/x86/16bit/reset16.lds
+else
+	mainboardinit cpu/x86/32bit/reset32.inc
+	ldscript /cpu/x86/32bit/reset32.lds
+end
+
+### Should this be in the northbridge code?
+#not in serengeti_cheetah mainboardinit arch/i386/lib/cpu_reset.inc
+
+##
+## Include an id string (For safe flashing)
+##
+mainboardinit arch/i386/lib/id.inc
+ldscript /arch/i386/lib/id.lds
+
+###
+### This is the early phase of linuxBIOS startup
+### Things are delicate and we test to see if we should
+### failover to another image.
+###
+if USE_FALLBACK_IMAGE
+	ldscript /arch/i386/lib/failover.lds
+#	mainboardinit ./failover.inc
+end
+
+###
+### O.k. We aren't just an intermediary anymore!
+###
+
+##
+## Setup RAM
+##
+mainboardinit cpu/x86/fpu/enable_fpu.inc
+
+if USE_DCACHE_RAM
+	mainboardinit cpu/amd/model_lx/cache_as_ram.inc
+	mainboardinit ./cache_as_ram_auto.inc
+end
+
+##
+## Include the secondary Configuration files
+##
+dir /pc80
+config chip.h
+
+chip northbridge/amd/lx
+	device pci_domain 0 on
+		device pci 1.0 on end				# Northbridge
+		device pci 1.1 on end				# Graphics
+		chip southbridge/amd/cs5536
+			# IRQ 12 and 1 unmasked,  Keyboard and Mouse IRQs. OK
+			# SIRQ Mode = Active(Quiet) mode. Save power....
+			# Invert mask = IRQ 12 and 1 are active high. Keyboard and Mouse, UARTs, etc IRQs. OK
+			register "lpc_serirq_enable" = "0x000010da"
+			register "lpc_serirq_polarity" = "0x0000EF25"
+			register "lpc_serirq_mode" = "1"
+			register "enable_gpio_int_route" = "0x0D0C0700"
+			register "enable_ide_nand_flash" = "0"	# 0:ide mode, 1:flash
+			register "enable_USBP4_device" = "1"	# 0: host, 1:device
+			register "enable_USBP4_overcurrent" = "0" #0:off, xxxx:overcurrent setting CS5536 Data Book (pages 380-381)
+			register "com1_enable" = "0"
+			register "com1_address" = "0x3F8"
+			register "com1_irq" = "4"
+			register "com2_enable" = "0"
+			register "com2_address" = "0x2F8"
+			register "com2_irq" = "3"
+			register "unwanted_vpci[0]" = "0"	# End of list has a zero
+			device pci d.0 on end			# Ethernet
+			device pci e.0 on end			# Slot1
+			device pci f.0 on			# ISA Bridge
+				chip superio/winbond/w83627hf
+					device pnp 2e.0 off	# Floppy
+						io 0x60 = 0x3f0
+						irq 0x70 = 6
+						drq 0x74 = 2
+					end
+					device pnp 2e.1 off	# Parallel port
+						io 0x60 = 0x378
+						irq 0x70 = 7
+					end
+					device pnp 2e.2 on	# Com1
+						io 0x60 = 0x3f8
+						irq 0x70 = 4
+					end
+					device pnp 2e.3 off end	# Com2
+					device pnp 2e.5 on	# Keyboard
+						io 0x60 = 0x60
+						io 0x62 = 0x64
+						irq 0x70 = 1
+						irq 0x72 = 12
+					end
+					device pnp 2e.6 off end	# CIR
+					device pnp 2e.7 off end	# GAME_MIDI_GIPO1
+					device pnp 2e.8 off end	# GPIO2
+					device pnp 2e.9 off end	# GPIO3
+					device pnp 2e.a off end	# ACPI
+					device pnp 2e.b off end	# HW Monitor
+				end
+			end
+			device pci f.2 on end			# IDE Controller
+			device pci f.3 on end			# Audio
+			device pci f.4 on end			# OHCI
+			device pci f.5 on end			# EHCI
+		end
+	end
+	# APIC cluster is late CPU init.
+	device apic_cluster 0 on
+		chip cpu/amd/model_lx
+			device apic 0 on end
+		end
+	end
+end
+
diff --git a/src/mainboard/amd/db800/Options.lb b/src/mainboard/amd/db800/Options.lb
new file mode 100644
index 0000000000..ea0e708feb
--- /dev/null
+++ b/src/mainboard/amd/db800/Options.lb
@@ -0,0 +1,179 @@
+uses HAVE_MP_TABLE
+uses HAVE_PIRQ_TABLE
+uses USE_FALLBACK_IMAGE
+uses HAVE_FALLBACK_BOOT
+uses HAVE_HARD_RESET
+uses HAVE_OPTION_TABLE
+uses USE_OPTION_TABLE
+uses CONFIG_ROM_PAYLOAD
+uses IRQ_SLOT_COUNT
+uses MAINBOARD
+uses MAINBOARD_VENDOR
+uses MAINBOARD_PART_NUMBER
+uses LINUXBIOS_EXTRA_VERSION
+uses ARCH
+uses FALLBACK_SIZE
+uses STACK_SIZE
+uses HEAP_SIZE
+uses ROM_SIZE
+uses ROM_SECTION_SIZE
+uses ROM_IMAGE_SIZE
+uses ROM_SECTION_SIZE
+uses ROM_SECTION_OFFSET
+uses CONFIG_ROM_PAYLOAD_START
+uses CONFIG_COMPRESSED_PAYLOAD_NRV2B
+uses CONFIG_COMPRESSED_PAYLOAD_LZMA
+uses CONFIG_PRECOMPRESSED_PAYLOAD
+uses PAYLOAD_SIZE
+uses _ROMBASE
+uses _RAMBASE
+uses XIP_ROM_SIZE
+uses XIP_ROM_BASE
+uses HAVE_MP_TABLE
+uses CROSS_COMPILE
+uses CC
+uses HOSTCC
+uses OBJCOPY
+uses DEFAULT_CONSOLE_LOGLEVEL
+uses MAXIMUM_CONSOLE_LOGLEVEL
+uses CONFIG_CONSOLE_SERIAL8250
+uses TTYS0_BAUD
+uses TTYS0_BASE
+uses TTYS0_LCS
+uses CONFIG_UDELAY_TSC
+uses CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2
+uses CONFIG_CONSOLE_VGA
+uses CONFIG_PCI_ROM_RUN
+uses CONFIG_VIDEO_MB
+uses USE_DCACHE_RAM
+uses DCACHE_RAM_BASE
+uses DCACHE_RAM_SIZE
+
+## ROM_SIZE is the size of boot ROM that this board will use.
+default ROM_SIZE  = 256*1024
+
+###
+### Build options
+###
+default CONFIG_CONSOLE_VGA=0
+default CONFIG_VIDEO_MB=8
+default CONFIG_PCI_ROM_RUN=0
+
+##
+## Build code for the fallback boot
+##
+default HAVE_FALLBACK_BOOT=1
+
+##
+## no MP table
+##
+default HAVE_MP_TABLE=0
+
+##
+## Build code to reset the motherboard from linuxBIOS
+##
+default HAVE_HARD_RESET=0
+
+## Delay timer options
+##
+default CONFIG_UDELAY_TSC=1
+default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
+
+##
+## Build code to export a programmable irq routing table
+##
+default HAVE_PIRQ_TABLE=1
+default IRQ_SLOT_COUNT=4
+#object irq_tables.o
+
+##
+## Build code to export a CMOS option table
+##
+default HAVE_OPTION_TABLE=0
+
+###
+### LinuxBIOS layout values
+###
+
+## ROM_IMAGE_SIZE is the amount of space to allow linuxBIOS to occupy.
+default ROM_IMAGE_SIZE = 65536
+default FALLBACK_SIZE = 131072
+
+##
+## enable CACHE_AS_RAM specifics
+##
+default USE_DCACHE_RAM=1
+default DCACHE_RAM_BASE=0xc8000
+default DCACHE_RAM_SIZE=0x08000
+
+##
+## Use a small 8K stack
+##
+default STACK_SIZE=0x2000
+
+##
+## Use a small 16K heap
+##
+default HEAP_SIZE=0x4000
+
+##
+## Only use the option table in a normal image
+##
+#default USE_OPTION_TABLE = !USE_FALLBACK_IMAGE
+default USE_OPTION_TABLE = 0
+
+default _RAMBASE = 0x00004000
+
+default CONFIG_ROM_PAYLOAD = 1
+
+##
+## The default compiler
+##
+default CROSS_COMPILE=""
+default CC="$(CROSS_COMPILE)gcc -m32"
+default HOSTCC="gcc"
+
+##
+## The Serial Console
+##
+
+# To Enable the Serial Console
+default CONFIG_CONSOLE_SERIAL8250=1
+
+## Select the serial console baud rate
+default TTYS0_BAUD=115200
+#default TTYS0_BAUD=57600
+#default TTYS0_BAUD=38400
+#default TTYS0_BAUD=19200
+#default TTYS0_BAUD=9600
+#default TTYS0_BAUD=4800
+#default TTYS0_BAUD=2400
+#default TTYS0_BAUD=1200
+
+# Select the serial console base port
+default TTYS0_BASE=0x3f8
+
+# Select the serial protocol
+# This defaults to 8 data bits, 1 stop bit, and no parity
+default TTYS0_LCS=0x3
+
+##
+### Select the linuxBIOS loglevel
+##
+## EMERG      1   system is unusable
+## ALERT      2   action must be taken immediately
+## CRIT       3   critical conditions
+## ERR        4   error conditions
+## WARNING    5   warning conditions
+## NOTICE     6   normal but significant condition
+## INFO       7   informational
+## DEBUG      8   debug-level messages
+## SPEW       9   Way too many details
+
+## Request this level of debugging output
+default  DEFAULT_CONSOLE_LOGLEVEL=8
+## At a maximum only compile in this level of debugging
+default  MAXIMUM_CONSOLE_LOGLEVEL=8
+
+end
+
diff --git a/src/mainboard/amd/db800/cache_as_ram_auto.c b/src/mainboard/amd/db800/cache_as_ram_auto.c
new file mode 100644
index 0000000000..215c58d533
--- /dev/null
+++ b/src/mainboard/amd/db800/cache_as_ram_auto.c
@@ -0,0 +1,132 @@
+/*
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ */
+
+#define ASSEMBLY 1
+
+#include <stdint.h>
+#include <device/pci_def.h>
+#include <arch/io.h>
+#include <device/pnp_def.h>
+#include <arch/hlt.h>
+#include "pc80/serial.c"
+#include "arch/i386/lib/console.c"
+#include "ram/ramtest.c"
+#include "cpu/x86/bist.h"
+#include "cpu/x86/msr.h"
+#include <cpu/amd/lxdef.h>
+#include <cpu/amd/geode_post_code.h>
+#include "southbridge/amd/cs5536/cs5536.h"
+
+#define POST_CODE(x) outb(x, 0x80)
+#define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1)
+
+#include "southbridge/amd/cs5536/cs5536_early_smbus.c"
+#include "southbridge/amd/cs5536/cs5536_early_setup.c"
+#include "superio/winbond/w83627hf/w83627hf_early_serial.c"
+
+static inline int spd_read_byte(unsigned int device, unsigned int address)
+{
+	return smbus_read_byte(device, address);
+}
+
+#define ManualConf 0		/* Do automatic strapped PLL config */
+#define PLLMSRhi 0x00001490	/* Manual settings for the PLL */
+#define PLLMSRlo 0x02000030
+#define DIMM0 0xA0
+#define DIMM1 0xA2
+
+#include "northbridge/amd/lx/raminit.h"
+#include "northbridge/amd/lx/pll_reset.c"
+#include "northbridge/amd/lx/raminit.c"
+#include "sdram/generic_sdram.c"
+#include "cpu/amd/model_lx/cpureginit.c"
+#include "cpu/amd/model_lx/syspreinit.c"
+
+static void msr_init(void)
+{
+	msr_t msr;
+
+	/* Setup access to the cache for under 1MB. */
+	msr.hi = 0x24fffc02;
+	msr.lo = 0x1000A000;	/* 0-A0000 write back */
+	wrmsr(CPU_RCONF_DEFAULT, msr);
+
+	msr.hi = 0x0;		/* Write back */
+	msr.lo = 0x0;
+	wrmsr(CPU_RCONF_A0_BF, msr);
+	wrmsr(CPU_RCONF_C0_DF, msr);
+	wrmsr(CPU_RCONF_E0_FF, msr);
+
+	/* Setup access to the cache for under 640K. Note MC not setup yet. */
+	msr.hi = 0x20000000;
+	msr.lo = 0xfff80;
+	wrmsr(MSR_GLIU0 + 0x20, msr);
+
+	msr.hi = 0x20000000;
+	msr.lo = 0x80fffe0;
+	wrmsr(MSR_GLIU0 + 0x21, msr);
+
+	msr.hi = 0x20000000;
+	msr.lo = 0xfff80;
+	wrmsr(MSR_GLIU1 + 0x20, msr);
+
+	msr.hi = 0x20000000;
+	msr.lo = 0x80fffe0;
+	wrmsr(MSR_GLIU1 + 0x21, msr);
+}
+
+static void mb_gpio_init(void)
+{
+	/* Early mainboard specific GPIO setup. */
+}
+
+void cache_as_ram_main(void)
+{
+	POST_CODE(0x01);
+
+	static const struct mem_controller memctrl[] = {
+		{.channel0 = {(0xa << 3) | 0, (0xa << 3) | 1}}
+	};
+
+	SystemPreInit();
+	msr_init();
+
+	cs5536_early_setup();
+
+	/* Note: must do this AFTER the early_setup! It is counting on some
+	 * early MSR setup for CS5536.
+	 */
+	w83627hf_enable_serial(SERIAL_DEV, TTYS0_BASE);
+	mb_gpio_init();
+	uart_init();
+	console_init();
+
+	pll_reset(ManualConf);
+
+	cpuRegInit();
+
+	sdram_initialize(1, memctrl);
+
+	/* Check memory. */
+	/* ram_check(0x00000000, 640 * 1024); */
+
+	/* Memory is setup. Return to cache_as_ram.inc and continue to boot. */
+	return;
+}
diff --git a/src/mainboard/amd/db800/chip.h b/src/mainboard/amd/db800/chip.h
new file mode 100644
index 0000000000..912f36ad59
--- /dev/null
+++ b/src/mainboard/amd/db800/chip.h
@@ -0,0 +1,25 @@
+/*
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ */
+
+extern struct chip_operations mainboard_amd_db800_ops;
+
+struct mainboard_amd_db800_config {
+	int nothing;
+};
diff --git a/src/mainboard/amd/db800/cmos.layout b/src/mainboard/amd/db800/cmos.layout
new file mode 100644
index 0000000000..5ba4c032c1
--- /dev/null
+++ b/src/mainboard/amd/db800/cmos.layout
@@ -0,0 +1,74 @@
+entries
+
+#start-bit length  config config-ID    name
+#0            8       r       0        seconds
+#8            8       r       0        alarm_seconds
+#16           8       r       0        minutes
+#24           8       r       0        alarm_minutes
+#32           8       r       0        hours
+#40           8       r       0        alarm_hours
+#48           8       r       0        day_of_week
+#56           8       r       0        day_of_month
+#64           8       r       0        month
+#72           8       r       0        year
+#80           4       r       0        rate_select
+#84           3       r       0        REF_Clock
+#87           1       r       0        UIP
+#88           1       r       0        auto_switch_DST
+#89           1       r       0        24_hour_mode
+#90           1       r       0        binary_values_enable
+#91           1       r       0        square-wave_out_enable
+#92           1       r       0        update_finished_enable
+#93           1       r       0        alarm_interrupt_enable
+#94           1       r       0        periodic_interrupt_enable
+#95           1       r       0        disable_clock_updates
+#96         288       r       0        temporary_filler
+0          384       r       0        reserved_memory
+384          1       e       4        boot_option
+385          1       e       4        last_boot
+386          1       e       1        ECC_memory
+388          4       r       0        reboot_bits
+392          3       e       5        baud_rate
+400          1       e       1        power_on_after_fail
+412          4       e       6        debug_level
+416          4       e       7        boot_first
+420          4       e       7        boot_second
+424          4       e       7        boot_third
+428          4       h       0        boot_index
+432	     8       h       0        boot_countdown
+1008         16      h       0        check_sum
+
+enumerations
+
+#ID value   text
+1     0     Disable
+1     1     Enable
+2     0     Enable
+2     1     Disable
+4     0     Fallback
+4     1     Normal
+5     0     115200
+5     1     57600
+5     2     38400
+5     3     19200
+5     4     9600
+5     5     4800
+5     6     2400
+5     7     1200
+6     6     Notice
+6     7     Info
+6     8     Debug
+6     9     Spew
+7     0     Network
+7     1     HDD
+7     2     Floppy
+7     8     Fallback_Network
+7     9     Fallback_HDD
+7     10    Fallback_Floppy
+#7     3     ROM
+
+checksums
+
+checksum 392 1007 1008
+
+
diff --git a/src/mainboard/amd/db800/failover.c b/src/mainboard/amd/db800/failover.c
new file mode 100644
index 0000000000..c233eb92f2
--- /dev/null
+++ b/src/mainboard/amd/db800/failover.c
@@ -0,0 +1,32 @@
+/*
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ */
+
+#define ASSEMBLY 1
+
+#include <stdint.h>
+#include <device/pci_def.h>
+#include <device/pci_ids.h>
+#include <arch/io.h>
+#include "pc80/mc146818rtc_early.c"
+
+static unsigned long main(unsigned long bist)
+{
+	return bist;
+}
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;
+}
diff --git a/src/mainboard/amd/db800/mainboard.c b/src/mainboard/amd/db800/mainboard.c
new file mode 100644
index 0000000000..1e417e244b
--- /dev/null
+++ b/src/mainboard/amd/db800/mainboard.c
@@ -0,0 +1,193 @@
+/*
+ * 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 <console/console.h>
+#include <device/device.h>
+#include <arch/io.h>
+#include <cpu/x86/msr.h>
+#include <cpu/amd/lxdef.h>
+#include <device/pci_def.h>
+#include "../../../southbridge/amd/cs5536/cs5536.h"
+#include "chip.h"
+
+/* Print the platform configuration - do before PCI init or it will not
+ * work right.
+ */
+void print_conf(void)
+{
+#if DEFAULT_CONSOLE_LOGLEVEL >= BIOS_ERR
+	int i;
+	unsigned long iol;
+	msr_t msr;
+
+	int cpu_msr_defs[] = { CPU_BC_L2_CONF, CPU_IM_CONFIG, CPU_DM_CONFIG0,
+		CPU_RCONF_DEFAULT, CPU_RCONF_BYPASS, CPU_RCONF_A0_BF,
+		CPU_RCONF_C0_DF, CPU_RCONF_E0_FF, CPU_RCONF_SMM, CPU_RCONF_DMM,
+		GLCP_DELAY_CONTROLS, GL_END
+	};
+
+	int gliu0_msr_defs[] = { MSR_GLIU0_BASE1, MSR_GLIU0_BASE2,
+		MSR_GLIU0_BASE4, MSR_GLIU0_BASE5, MSR_GLIU0_BASE6,
+		GLIU0_P2D_BMO_0, GLIU0_P2D_BMO_1, MSR_GLIU0_SYSMEM,
+		GLIU0_P2D_RO_0, GLIU0_P2D_RO_1, GLIU0_P2D_RO_2,
+		MSR_GLIU0_SHADOW, GLIU0_IOD_BM_0, GLIU0_IOD_BM_1,
+		GLIU0_IOD_BM_2, GLIU0_IOD_SC_0, GLIU0_IOD_SC_1, GLIU0_IOD_SC_2,
+		GLIU0_IOD_SC_3, GLIU0_IOD_SC_4, GLIU0_IOD_SC_5,
+		GLIU0_GLD_MSR_COH, GL_END
+	};
+
+	int gliu1_msr_defs[] = { MSR_GLIU1_BASE1, MSR_GLIU1_BASE2,
+		MSR_GLIU1_BASE3, MSR_GLIU1_BASE4, MSR_GLIU1_BASE5,
+		MSR_GLIU1_BASE6, MSR_GLIU1_BASE7, MSR_GLIU1_BASE8,
+		MSR_GLIU1_BASE9, MSR_GLIU1_BASE10, GLIU1_P2D_R_0,
+		GLIU1_P2D_R_1, GLIU1_P2D_R_2, GLIU1_P2D_R_3, MSR_GLIU1_SHADOW,
+		GLIU1_IOD_BM_0, GLIU1_IOD_BM_1, GLIU1_IOD_BM_2, GLIU1_IOD_SC_0,
+		GLIU1_IOD_SC_1, GLIU1_IOD_SC_2, GLIU1_IOD_SC_3,
+		GLIU1_GLD_MSR_COH, GL_END
+	};
+
+	int rconf_msr[] = { CPU_RCONF0, CPU_RCONF1, CPU_RCONF2, CPU_RCONF3,
+		CPU_RCONF4, CPU_RCONF5, CPU_RCONF6, CPU_RCONF7, GL_END
+	};
+
+	int cs5536_msr[] = { MDD_LBAR_GPIO, MDD_LBAR_FLSH0, MDD_LBAR_FLSH1,
+		MDD_LEG_IO, MDD_PIN_OPT, MDD_IRQM_ZLOW, MDD_IRQM_ZHIGH,
+		MDD_IRQM_PRIM, GL_END
+	};
+
+	int pci_msr[] = { GLPCI_CTRL, GLPCI_ARB, GLPCI_REN, GLPCI_A0_BF,
+		GLPCI_C0_DF, GLPCI_E0_FF, GLPCI_RC0, GLPCI_RC1, GLPCI_RC2,
+		GLPCI_RC3, GLPCI_ExtMSR, GLPCI_SPARE, GL_END
+	};
+
+	int dma_msr[] = { MDD_DMA_MAP, MDD_DMA_SHAD1, MDD_DMA_SHAD2,
+		MDD_DMA_SHAD3, MDD_DMA_SHAD4, MDD_DMA_SHAD5, MDD_DMA_SHAD6,
+		MDD_DMA_SHAD7, MDD_DMA_SHAD8, MDD_DMA_SHAD9, GL_END
+	};
+
+	printk_debug("---------- CPU ------------\n");
+
+	for (i = 0; cpu_msr_defs[i] != GL_END; i++) {
+		msr = rdmsr(cpu_msr_defs[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n",
+			     cpu_msr_defs[i], msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- GLIU 0 ------------\n");
+
+	for (i = 0; gliu0_msr_defs[i] != GL_END; i++) {
+		msr = rdmsr(gliu0_msr_defs[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n",
+			     gliu0_msr_defs[i], msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- GLIU 1 ------------\n");
+
+	for (i = 0; gliu1_msr_defs[i] != GL_END; i++) {
+		msr = rdmsr(gliu1_msr_defs[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n",
+			     gliu1_msr_defs[i], msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- RCONF ------------\n");
+
+	for (i = 0; rconf_msr[i] != GL_END; i++) {
+		msr = rdmsr(rconf_msr[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", rconf_msr[i],
+			     msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- VARIA ------------\n");
+	msr = rdmsr(0x51300010);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", 0x51300010, msr.hi,
+		     msr.lo);
+
+	msr = rdmsr(0x51400015);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", 0x51400015, msr.hi,
+		     msr.lo);
+
+	printk_debug("---------- DIVIL IRQ ------------\n");
+	msr = rdmsr(MDD_IRQM_YLOW);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", MDD_IRQM_YLOW, msr.hi,
+		     msr.lo);
+	msr = rdmsr(MDD_IRQM_YHIGH);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", MDD_IRQM_YHIGH,
+		     msr.hi, msr.lo);
+	msr = rdmsr(MDD_IRQM_ZLOW);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", MDD_IRQM_ZLOW, msr.hi,
+		     msr.lo);
+	msr = rdmsr(MDD_IRQM_ZHIGH);
+	printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", MDD_IRQM_ZHIGH,
+		     msr.hi, msr.lo);
+
+	printk_debug("---------- PCI ------------\n");
+
+	for (i = 0; pci_msr[i] != GL_END; i++) {
+		msr = rdmsr(pci_msr[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", pci_msr[i],
+			     msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- LPC/UART DMA ------------\n");
+
+	for (i = 0; dma_msr[i] != GL_END; i++) {
+		msr = rdmsr(dma_msr[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", dma_msr[i],
+			     msr.hi, msr.lo);
+	}
+
+	printk_debug("---------- CS5536 ------------\n");
+
+	for (i = 0; cs5536_msr[i] != GL_END; i++) {
+		msr = rdmsr(cs5536_msr[i]);
+		printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", cs5536_msr[i],
+			     msr.hi, msr.lo);
+	}
+
+	iol = inl(GPIO_IO_BASE + GPIOL_INPUT_ENABLE);
+	printk_debug("IOR 0x%08X is now 0x%08X\n",
+		     GPIO_IO_BASE + GPIOL_INPUT_ENABLE, iol);
+	iol = inl(GPIOL_EVENTS_ENABLE);
+	printk_debug("IOR 0x%08X is now 0x%08X\n",
+		     GPIO_IO_BASE + GPIOL_EVENTS_ENABLE, iol);
+	iol = inl(GPIOL_INPUT_INVERT_ENABLE);
+	printk_debug("IOR 0x%08X is now 0x%08X\n",
+		     GPIO_IO_BASE + GPIOL_INPUT_INVERT_ENABLE, iol);
+	iol = inl(GPIO_MAPPER_X);
+	printk_debug("IOR 0x%08X is now 0x%08X\n", GPIO_IO_BASE + GPIO_MAPPER_X,
+		     iol);
+#endif				//DEFAULT_CONSOLE_LOGLEVEL >= BIOS_ERR
+}
+
+static void init(struct device *dev)
+{
+	printk_debug("AMD DB800 ENTER %s\n", __FUNCTION__);
+	printk_debug("AMD DB800 EXIT %s\n", __FUNCTION__);
+}
+
+static void enable_dev(struct device *dev)
+{
+	dev->ops->init = init;
+}
+
+struct chip_operations mainboard_amd_db800_ops = {
+	CHIP_NAME("AMD DB800 Mainboard")
+	.enable_dev = enable_dev,
+
+};
diff --git a/targets/amd/db800/Config.lb b/targets/amd/db800/Config.lb
new file mode 100644
index 0000000000..d105a2341a
--- /dev/null
+++ b/targets/amd/db800/Config.lb
@@ -0,0 +1,49 @@
+##
+## 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 as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## 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
+##
+
+# Config file for the AMD Geode LX/5536 DB800 platform.
+
+target db800
+mainboard amd/db800
+
+# HACK to get the right TSC support.
+option CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
+
+option CONFIG_COMPRESSED_PAYLOAD_NRV2B=0
+option CONFIG_COMPRESSED_PAYLOAD_LZMA=0
+
+# Leave 36k for VSA.
+option ROM_SIZE=512*1024-36*1024
+# option ROM_SIZE=256*1024-36*1024
+option FALLBACK_SIZE=ROM_SIZE
+
+option DEFAULT_CONSOLE_LOGLEVEL = 11
+option MAXIMUM_CONSOLE_LOGLEVEL = 11
+# option DEFAULT_CONSOLE_LOGLEVEL = 4
+# option MAXIMUM_CONSOLE_LOGLEVEL = 4
+
+romimage "fallback"
+	option USE_FALLBACK_IMAGE=1
+	option ROM_IMAGE_SIZE=64*1024
+	option LINUXBIOS_EXTRA_VERSION=".0Fallback"
+	payload ../payload.elf
+end
+
+buildrom ./db800.rom ROM_SIZE "fallback"