epia-cn patch

[aaron lwe]

Hi,

This is a working patch for epia-cn which uses C7 + CN700 + VT8237R.
Signed-off-by: Aaron Lwe

-Aaron

[Peter Stuge]

Hi Aaron,

On Tue, May 13, 2008 at 05:40:43PM +0800, aaron lwe wrote:
> This is a working patch for epia-cn which uses C7 + CN700 + VT8237R.
> Signed-off-by: Aaron Lwe

Cool!
> Index: src/mainboard/via/epia-cn/dsdt.c
>
> --- src/mainboard/via/epia-cn/dsdt.c	(revision 0)
> +++ src/mainboard/via/epia-cn/dsdt.c	(revision 0)
> @@ -0,0 +1,2487 @@
> +/*
> Intel ACPI Component Architecture
> ASL Optimizing Compiler version 20061109 [Aug 11 2007]
> Copyright (C) 2000 - 2006 Intel Corporation
> Supports ACPI Specification Revision 3.0a
> Compilation of "dsdt.dsl" - Mon Jan 28 11:04:07 2008
> C source code output
> */

Do you have the dsdt.dsl source? Where did it come from?
> Index: src/mainboard/via/epia-cn/fadt.c
>
> --- src/mainboard/via/epia-cn/fadt.c	(revision 0)
> +++ src/mainboard/via/epia-cn/fadt.c	(revision 0)
> @@ -0,0 +1,154 @@
> +/*
> ACPI - create the Fixed ACPI Description Tables (FADT)
> Copyright (C) 2004 Nick Barker

Did you change anything in this file? Then I think you should add
your copyright, possibly even remove Nick's.
> +void acpi_create_fadt(acpi_fadt_t *fadt,acpi_facs_t *facs,void *dsdt){
> acpi_header_t *header=&(fadt->header);
> memset((void *)fadt,0,sizeof(acpi_fadt_t));
> memcpy(header->signature,"FACP",4);
> header->length = 244;
> header->revision = 1;
> memcpy(header->oem_id,"CN700 ",6);
> memcpy(header->oem_table_id,"AWRDACPI",8);
> memcpy(header->asl_compiler_id,"AWRD",4);

We are not Award. What is this about?
> header->asl_compiler_revision=0;
> fadt->firmware_ctrl=facs;
> fadt->dsdt= dsdt;
> fadt->preferred_pm_profile=0;
> fadt->sci_int=9;
> fadt->smi_cmd = 0x0;
> fadt->acpi_enable = 0x0;
> fadt->acpi_disable = 0x0;
> fadt->s4bios_req = 0x0;
> fadt->pstate_cnt = 0x0;
> fadt->pm1a_evt_blk = 0x400;
> fadt->pm1b_evt_blk = 0x0;
> fadt->pm1a_cnt_blk = 0x404;
> fadt->pm1b_cnt_blk = 0x0;
> fadt->pm2_cnt_blk = 0x0;
> fadt->pm_tmr_blk = 0x408;
> fadt->gpe0_blk = 0x420;
> fadt->gpe1_blk = 0x0;

Where do all these magic values come from?
> -/**
> Configure the bus between the cpu and the northbridge. This might be able to
> be moved to post-ram code in the future. For the most part, these registers
> should not be messed around with. These are too complex to explain short of
> copying the datasheets into the comments, but most of these values are from
> the BIOS Porting Guide, so they should work on any board. If they don't,
> try the values from your factory BIOS.
> TODO: Changing the DRAM frequency doesn't work (hard lockup)
> @param dev The northbridge's CPU Host Interface (D0F2)
> */
>
> static void c7_cpu_setup(device_t dev)
>  {

Hey, please don't remove doxygen. :)
> Index: src/northbridge/via/cn700/northbridge.c
>
> --- src/northbridge/via/cn700/northbridge.c	(revision 3300)
> +++ src/northbridge/via/cn700/northbridge.c	(working copy)
> @@ -1,6 +1,8 @@
>  /*
> This file is part of the coreboot project.
> Copyright (C) 2008 VIA Technologies, Inc.
> Copyright (C) 2008 Aaron Lwe

How is VIA involved in this?

Thanks a lot for the patch! I guess Corey and Bari will have a go at
it but I'll try to test as well.

//Peter

[Rudolf Marek]

Hi all

Here are some quick comments. Most notable on things I know. I may have more 
time later this week.

Rudolf
> #define VT8237R_APIC_ID			0x2
> -#define VT8237R_ACPI_IO_BASE		0x500
> -#define VT8237R_SMBUS_IO_BASE		0x400
> +#define VT8237R_ACPI_IO_BASE		0x400
> +#define VT8237R_SMBUS_IO_BASE	0x500

Why? You need this for the ACPI DSDT?
> /* 0x0 disable
> Index: src/mainboard/via/epia-cn/fadt.c
>
> --- src/mainboard/via/epia-cn/fadt.c	(revision 0)
> +++ src/mainboard/via/epia-cn/fadt.c	(revision 0)
> @@ -0,0 +1,154 @@
> +/*
> ACPI - create the Fixed ACPI Description Tables (FADT)
> Copyright (C) 2004 Nick Barker
> 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
> */
>
> +#include <string.h>
> +#include <arch/acpi.h>
>
> +void acpi_create_fadt(acpi_fadt_t *fadt,acpi_facs_t *facs,void *dsdt){
> acpi_header_t *header=&(fadt->header);
> memset((void *)fadt,0,sizeof(acpi_fadt_t));
> memcpy(header->signature,"FACP",4);
> header->length = 244;
> header->revision = 1;
> memcpy(header->oem_id,"CN700 ",6);
> memcpy(header->oem_table_id,"AWRDACPI",8);
> memcpy(header->asl_compiler_id,"AWRD",4);
> header->asl_compiler_revision=0;
> fadt->firmware_ctrl=facs;
> fadt->dsdt= dsdt;
> fadt->preferred_pm_profile=0;
> fadt->sci_int=9;
> fadt->smi_cmd = 0x0;
> fadt->acpi_enable = 0x0;
> fadt->acpi_disable = 0x0;
> fadt->s4bios_req = 0x0;
> fadt->pstate_cnt = 0x0;
> fadt->pm1a_evt_blk = 0x400;
> fadt->pm1b_evt_blk = 0x0;
> fadt->pm1a_cnt_blk = 0x404;
> fadt->pm1b_cnt_blk = 0x0;
> fadt->pm2_cnt_blk = 0x0;
> fadt->pm_tmr_blk = 0x408;
> fadt->gpe0_blk = 0x420;
> fadt->gpe1_blk = 0x0;
> fadt->pm1_evt_len = 4;
> fadt->pm1_cnt_len = 2;
> fadt->pm2_cnt_len = 1;
> fadt->pm_tmr_len = 4;
> fadt->gpe0_blk_len = 4;
> fadt->gpe1_blk_len = 0;
> fadt->gpe1_base = 0;
> fadt->cst_cnt = 0;
> fadt->p_lvl2_lat = 0x50; //90;
> fadt->p_lvl3_lat = 0x320; //900;
> fadt->flush_size = 0;
> fadt->flush_stride = 0;
> fadt->duty_offset = 0;
> fadt->duty_width = 1;
> fadt->day_alrm = 0x7d;
> fadt->mon_alrm = 0x7e;
> fadt->century = 0x32;
> fadt->iapc_boot_arch = 0x0;
> fadt->flags = 0x4a5;
> fadt->reset_reg.space_id = 0;
> fadt->reset_reg.bit_width = 0;
> fadt->reset_reg.bit_offset = 0;
> fadt->reset_reg.resv = 0;
> fadt->reset_reg.addrl = 0x0;
> fadt->reset_reg.addrh = 0x0;
> fadt->reset_value = 0;
> fadt->x_firmware_ctl_l = facs;
> fadt->x_firmware_ctl_h = 0;
> fadt->x_dsdt_l = dsdt;
> fadt->x_dsdt_h = 0;
> fadt->x_pm1a_evt_blk.space_id = 1;
> fadt->x_pm1a_evt_blk.bit_width = 4;
> fadt->x_pm1a_evt_blk.bit_offset = 0;
> fadt->x_pm1a_evt_blk.resv = 0;
> fadt->x_pm1a_evt_blk.addrl = 0x400;
> fadt->x_pm1a_evt_blk.addrh = 0x0;
> fadt->x_pm1b_evt_blk.space_id = 1;
> fadt->x_pm1b_evt_blk.bit_width = 4;
> fadt->x_pm1b_evt_blk.bit_offset = 0;
> fadt->x_pm1b_evt_blk.resv = 0;
> fadt->x_pm1b_evt_blk.addrl = 0x0;
> fadt->x_pm1b_evt_blk.addrh = 0x0;
> fadt->x_pm1a_cnt_blk.space_id = 1;
> fadt->x_pm1a_cnt_blk.bit_width = 2;
> fadt->x_pm1a_cnt_blk.bit_offset = 0;
> fadt->x_pm1a_cnt_blk.resv = 0;
> fadt->x_pm1a_cnt_blk.addrl = 0x404;
> fadt->x_pm1a_cnt_blk.addrh = 0x0;
> fadt->x_pm1b_cnt_blk.space_id = 1;
> fadt->x_pm1b_cnt_blk.bit_width = 2;
> fadt->x_pm1b_cnt_blk.bit_offset = 0;
> fadt->x_pm1b_cnt_blk.resv = 0;
> fadt->x_pm1b_cnt_blk.addrl = 0x0;
> fadt->x_pm1b_cnt_blk.addrh = 0x0;
> fadt->x_pm2_cnt_blk.space_id = 1;
> fadt->x_pm2_cnt_blk.bit_width = 0;
> fadt->x_pm2_cnt_blk.bit_offset = 0;
> fadt->x_pm2_cnt_blk.resv = 0;
> fadt->x_pm2_cnt_blk.addrl = 0x0;
> fadt->x_pm2_cnt_blk.addrh = 0x0;
> fadt->x_pm_tmr_blk.space_id = 1;
> fadt->x_pm_tmr_blk.bit_width = 4;
> fadt->x_pm_tmr_blk.bit_offset = 0;
> fadt->x_pm_tmr_blk.resv = 0;
> fadt->x_pm_tmr_blk.addrl = 0x408;
> fadt->x_pm_tmr_blk.addrh = 0x0;
> fadt->x_gpe0_blk.space_id = 1;
> fadt->x_gpe0_blk.bit_width = 0;
> fadt->x_gpe0_blk.bit_offset = 0;
> fadt->x_gpe0_blk.resv = 0;
> fadt->x_gpe0_blk.addrl = 0x420;
> fadt->x_gpe0_blk.addrh = 0x0;
> fadt->x_gpe1_blk.space_id = 1;
> fadt->x_gpe1_blk.bit_width = 0;
> fadt->x_gpe1_blk.bit_offset = 0;
> fadt->x_gpe1_blk.resv = 0;
> fadt->x_gpe1_blk.addrl = 0x0;
> fadt->x_gpe1_blk.addrh = 0x0;
> header->checksum = acpi_checksum((void *)fadt, sizeof(acpi_fadt_t));

Please do not hardcode the ports and use the defines as I did for asus a8v-e
> +}
> Index: src/mainboard/via/epia-cn/Config.lb
> ===================================================================
> --- src/mainboard/via/epia-cn/Config.lb	(revision 0)
> +++ src/mainboard/via/epia-cn/Config.lb	(revision 0)
> @@ -0,0 +1,218 @@
> +##
> +## This file is part of the coreboot project.
> +##
> +## 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
> +##
>
> +##
> +## Compute the location and size of where this firmware image
> +## (coreboot 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 coreboot bootloader.
> +##
> +default PAYLOAD_SIZE            = ( ROM_SECTION_SIZE - ROM_IMAGE_SIZE )
> +default CONFIG_ROM_PAYLOAD_START = (0xffffffff - ROM_SIZE + ROM_SECTION_OFFSET + 1)
>
> +##
> +## Compute where this copy of coreboot 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 coreboot,
> +## 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=0x10000
> +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 HAVE_MP_TABLE object mptable.o end
>
> +if HAVE_ACPI_TABLES
> object fadt.o
> object dsdt.o
> object acpi_tables.o
>
> +end
>
> +##
> +## Romcc output
> +##
> +makerule ./failover.E
> depends "$(MAINBOARD)/failover.c ./romcc"
> action "./romcc -E -O --label-prefix=failover -I$(TOP)/src -I. $(CPPFLAGS) $(MAINBOARD)/failover.c -o $@"
>
> +end
>
> +makerule ./failover.inc
> depends "$(MAINBOARD)/failover.c ./romcc"
> action "./romcc    -O --label-prefix=failover -I$(TOP)/src -I. $(CPPFLAGS) $(MAINBOARD)/failover.c -o $@"
>
> +end
>
> +makerule ./auto.E
> depends	"$(MAINBOARD)/auto.c option_table.h ./romcc"
> action	"./romcc -E -mcpu=c3 -O -I$(TOP)/src -I. $(CPPFLAGS) $(MAINBOARD)/auto.c -o $@"
>
> +end
> +makerule ./auto.inc
> depends "$(MAINBOARD)/auto.c option_table.h ./romcc"
> action	"./romcc    -mcpu=c3 -O -I$(TOP)/src -I. $(CPPFLAGS) $(MAINBOARD)/auto.c -o $@"
>
> +end
>
> +##
> +## Build our 16 bit and 32 bit coreboot 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 coreboot 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?
> +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 coreboot 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
> +mainboardinit cpu/x86/mmx/enable_mmx.inc
> +mainboardinit ./auto.inc
> +mainboardinit cpu/x86/mmx/disable_mmx.inc
>
> +##
> +## Include the secondary Configuration files 
> +##
> +dir /pc80
> +config chip.h
>
> +chip northbridge/via/cn700
> device pci_domain 0 on
> device pci 0.0 on end # AGP Bridge
> device pci 0.1 on end # Error Reporting
> device pci 0.2 on end # Host Bus Control
> device pci 0.3 on end # Memory Controller
> device pci 0.4 on end # Power Management
> device pci 0.7 on end # V-Link Controller
> device pci 1.0 on # PCI Bridge
>
> +#			chip drivers/pci/onboard
> +#				device pci 0.0 on end
> +#				register "rom_address" = "0xfff80000" #512k image
> +#			end # Onboard Video
> end # PCI Bridge
> chip southbridge/via/vt8237r
> 	#both IDE channels
> 	register "ide0_enable" = "1"
> 	register "ide1_enable" = "1"
> 	#both cables are 80pin
> 	register "ide0_80pin_cable" = "0"
> 	register "ide1_80pin_cable" = "0"
> 	device pci f.0 on end # IDE
> 	register "fn_ctrl_lo" = "0x8a"
> 	register "fn_ctrl_hi" = "0x9d"
> 	device pci 10.0 on end # USB 1.1
> 	device pci 10.1 on end # USB 1.1
> 	device pci 10.2 on end # USB 1.1
> 	device pci 10.3 on end # USB 1.1
> 	device pci 11.0 on      # Southbridge LPC
> 		chip superio/via/vt1211
> 			device pnp 2e.0 off	# Floppy
> 				io 0x60 = 0x3f0
> 				irq 0x70 = 6
> 				drq 0x74 = 2
> 			end
> 			device pnp 2e.1 on	# Parallel Port
> 				io 0x60 = 0x378
> 				irq 0x70 = 7
> 				drq 0x74 = 3
> 			end
> 			device pnp 2e.2 on	# COM1
> 				io 0x60 = 0x3f8
> 				irq 0x70 = 4
> 			end
> 			#device pnp 2e.3 on	# COM2
> 			#	io 0x60 = 0x2f8
> 			#	irq 0x70 = 3
> 			#end
> 			device pnp 2e.b on	# HWM
> 				io 0x60 = 0xec00
> 			end
> 		end #superio
> 	end # pci 11.0
> 	# 1-4 non existant
> 	device pci 11.5 on end # AC97 Audio
> 	#device pci 11.6 off end # AC97 Modem
> 	device pci 12.0 on end  # Ethernet
> end # vt8237
> end # pci domain 0
> device apic_cluster 0 on
> chip cpu/via/model_c7
> 	device apic 0 on end 
> end
> end
>
> +end # cn700
> Index: src/mainboard/via/epia-cn/irq_tables.c
> ===================================================================
> --- src/mainboard/via/epia-cn/irq_tables.c	(revision 0)
> +++ src/mainboard/via/epia-cn/irq_tables.c	(revision 0)
> @@ -0,0 +1,48 @@
> +/* This file was generated by getpir.c, do not modify!
> (but if you do, please run checkpir on it to verify)
> Contains the IRQ Routing Table dumped directly from your
> memory, which BIOS sets up.
> Documentation at: http://www.microsoft.com/whdc/archive/pciirq.mspx
> */
>
> +#ifdef GETPIR
> +#include "pirq_routing.h"
> +#else
> +#include <arch/pirq_routing.h>
> +#endif
>
> +const struct irq_routing_table intel_irq_routing_table = {
> PIRQ_SIGNATURE,  /* u32 signature */
> PIRQ_VERSION,    /* u16 version   */
> 32+16*10,	 /* There can be total 10 devices on the bus */
> 0x00,		 /* Where the interrupt router lies (bus) */
> (0x11<<3)|0x0,   /* Where the interrupt router lies (dev) */
> 0x828,		 /* IRQs devoted exclusively to PCI usage */
> 0x1106,		 /* Vendor */
> 0x596,		 /* Device */
> 0,		 /* Crap (miniport) */
> { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* u8 rfu[11] */
> 0x3e,		 /* u8 checksum. This has to be set to some
> 	    value that would give 0 after the sum of all
> 	    bytes for this structure (including checksum) */
> {
> /* bus,     dev|fn,   {link, bitmap}, {link, bitmap}, {link, bitmap}, {link, bitmap},  slot, rfu */
> {0x00,(0x08<<3)|0x0, {{0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x1, 0x0},
> {0x00,(0x09<<3)|0x0, {{0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0xdef8}, {0x01, 0x0def8}}, 0x2, 0x0},
> {0x00,(0x0a<<3)|0x0, {{0x03, 0xdef8}, {0x05, 0xdef8}, {0x01, 0xdef8}, {0x02, 0x0def8}}, 0x3, 0x0},
> {0x00,(0x0b<<3)|0x0, {{0x05, 0xdef8}, {0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0x0def8}}, 0x4, 0x0},
> {0x00,(0x0c<<3)|0x0, {{0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x5, 0x0},
> {0x00,(0x11<<3)|0x0, {{0x00, 0xdef8}, {0x00, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x0, 0x0},
> {0x00,(0x0f<<3)|0x0, {{0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x0, 0x0},
> {0x00,(0x01<<3)|0x0, {{0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x0, 0x0},
> {0x00,(0x10<<3)|0x0, {{0x01, 0xdef8}, {0x02, 0xdef8}, {0x03, 0xdef8}, {0x05, 0x0def8}}, 0x0, 0x0},
> {0x00,(0x12<<3)|0x0, {{0x01, 0xdef8}, {0x00, 0xdef8}, {0x00, 0xdef8}, {0x00, 0x0def8}}, 0x0, 0x0},
> }
>
> +};
>
> +unsigned long write_pirq_routing_table(unsigned long addr)
> +{
>    return copy_pirq_routing_table(addr);
>
> +}
> Index: src/mainboard/via/epia-cn/debug.c
> ===================================================================
> --- src/mainboard/via/epia-cn/debug.c	(revision 0)
> +++ src/mainboard/via/epia-cn/debug.c	(revision 0)
> @@ -0,0 +1,142 @@
>
> +static void print_debug_pci_dev(unsigned dev)
> +{
> print_debug("PCI: ");
> print_debug_hex8((dev >> 16) & 0xff);
> print_debug_char(':');
> print_debug_hex8((dev >> 11) & 0x1f);
> print_debug_char('.');
> print_debug_hex8((dev >> 8) & 7);
>
> +}
>
> +static void print_pci_devices(void)
> +{
> device_t dev;
> for(dev = PCI_DEV(0, 0, 0);
> dev <= PCI_DEV(0, 0x1f, 0x7); 
> dev += PCI_DEV(0,0,1)) {
> print_debug("device being printed is 0x");
> print_debug_hex32(dev);
> print_debug("\r\n");
> uint32_t id;
> id = pci_read_config32(dev, PCI_VENDOR_ID);
> if (((id & 0xffff) == 0x0000) || ((id & 0xffff) == 0xffff) ||
> 	(((id >> 16) & 0xffff) == 0xffff) ||
> 	(((id >> 16) & 0xffff) == 0x0000)) {
> 	continue;
> }
> print_debug_pci_dev(dev);
> print_debug("\r\n");
> }
>
> +}
>
> +static void dump_pci_device(unsigned dev)
> +{
> int i;
> print_debug_pci_dev(dev);
> print_debug("\r\n");
> for(i = 0; i <= 255; i++) {
> unsigned char val;
> if ((i & 0x0f) == 0) {
> 	print_debug_hex8(i);
> 	print_debug_char(':');
> }
> val = pci_read_config8(dev, i);
> print_debug_char(' ');
> print_debug_hex8(val);
> if ((i & 0x0f) == 0x0f) {
> 	print_debug("\r\n");
> }
> }
>
> +}
>
> +static void dump_pci_devices(void)
> +{
> device_t dev;
> for(dev = PCI_DEV(0, 0, 0);
> dev <= PCI_DEV(0, 0x1f, 0x7); 
> dev += PCI_DEV(0,0,1)) {
> uint32_t id;
> id = pci_read_config32(dev, PCI_VENDOR_ID);
> if (((id & 0xffff) == 0x0000) || ((id & 0xffff) == 0xffff) ||
> 	(((id >> 16) & 0xffff) == 0xffff) ||
> 	(((id >> 16) & 0xffff) == 0x0000)) {
> 	continue;
> }
> dump_pci_device(dev);
> }
>
> +}
> +#if 0
> +static void dump_spd_registers(const struct mem_controller *ctrl)
> +{
> int i;
> print_debug("\r\n");
> for(i = 0; i < 4; i++) {
> unsigned device;
> device = ctrl->channel0[i];
> if (device) {
> 	int j;
> 	print_debug("dimm: "); 
> 	print_debug_hex8(i); 
> 	print_debug(".0: ");
> 	print_debug_hex8(device);
> 	for(j = 0; j < 256; j++) {
> 		int status;
> 		unsigned char byte;
> 		if ((j & 0xf) == 0) {
> 			print_debug("\r\n");
> 			print_debug_hex8(j);
> 			print_debug(": ");
> 		}
> 		status = smbus_read_byte(device, j);
> 		if (status < 0) {
> 			print_debug("bad device\r\n");
> 			break;
> 		}
> 		byte = status & 0xff;
> 		print_debug_hex8(byte);
> 		print_debug_char(' ');
> 	}
> 	print_debug("\r\n");
> }
> device = ctrl->channel1[i];
> if (device) {
> 	int j;
> 	print_debug("dimm: "); 
> 	print_debug_hex8(i); 
> 	print_debug(".1: ");
> 	print_debug_hex8(device);
> 	for(j = 0; j < 256; j++) {
> 		int status;
> 		unsigned char byte;
> 		if ((j & 0xf) == 0) {
> 			print_debug("\r\n");
> 			print_debug_hex8(j);
> 			print_debug(": ");
> 		}
> 		status = smbus_read_byte(device, j);
> 		if (status < 0) {
> 			print_debug("bad device\r\n");
> 			break;
> 		}
> 		byte = status & 0xff;
> 		print_debug_hex8(byte);
> 		print_debug_char(' ');
> 	}
> 	print_debug("\r\n");
> }
> }
>
> +}
> +#endif
>
> +void print_debug_val8(unsigned dev, u8 offset)
> +{
> print_debug("dump value for device  ");
> print_debug_hex32(dev);
> print_debug(" offset 0x");
> print_debug_hex8(offset);
> print_debug(" value 0x");
> print_debug_hex8(pci_read_config8(dev, offset));
> print_debug("\r\n");
>
> +}
> Index: src/mainboard/via/epia-cn/acpi_tables.c
> ===================================================================
> --- src/mainboard/via/epia-cn/acpi_tables.c	(revision 0)
> +++ src/mainboard/via/epia-cn/acpi_tables.c	(revision 0)
> @@ -0,0 +1,108 @@
> +/*
> coreboot ACPI Table support
> written by Stefan Reinauer
> ACPI FADT, FACS, and DSDT table support added by
> Nick Barker , and those portions
> (C) Copyright 2004 Nick Barker
> (C) Copyright 2005 Stefan Reinauer
> */
>
> +#include <console/console.h>
> +#include <string.h>
> +#include <arch/acpi.h>
>
> +extern unsigned char AmlCode[];
>
> +unsigned long acpi_fill_madt(unsigned long current)
> +{
> printk_debug("                * entering apci_fill_madt()\n");
> unsigned int gsi_base=0x18;
> /* create all subtables for processors */
> current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 0, 0);
> /* SB IOAPIC */
> current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current,
> 	0x02, 0xfec00000UL, 0);

Again please use the defines from VT8237R as I did.
> /* Write NB IOAPIC */
> current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current, 0x3,
> 	0xfecc0000UL, gsi_base);

Same here
> current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
> 				current, 0, 0, 2, 0);
> current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
> 				current, 0, 9, 9, 0xf);
> /* create all subtables for processors */
> current += acpi_create_madt_lapic_nmi((acpi_madt_lapic_nmi_t *)current,
> 						0, 5, 1);
> printk_debug("                * leaving acpi_fill_madt()\n");
> return current;
>
> +}
>
> +unsigned long acpi_fill_srat(unsigned long current)
> +{
> return current;
>
> +}
>
> +unsigned long acpi_fill_mcfg(unsigned long current)
> +{
> return current;
>
> +}
>
> +unsigned long write_acpi_tables(unsigned long start)
> +{
> unsigned long current;
> acpi_rsdp_t *rsdp;
> acpi_rsdt_t *rsdt;
> acpi_hpet_t *hpet;
> acpi_madt_t *madt;
> acpi_fadt_t *fadt;
> acpi_facs_t *facs;
> acpi_header_t *dsdt;
> /* Align ACPI tables to 16byte */
> start   = ( start + 0x0f ) & -0x10;
> current = start;
> printk_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);
> rsdt = (acpi_rsdt_t *) current;
> current += sizeof(acpi_rsdt_t);
> /* clear all table memory */
> memset((void *)start, 0, current - start);
> acpi_write_rsdp(rsdp, rsdt);
> acpi_write_rsdt(rsdt);
> rsdp->checksum = acpi_checksum(rsdp, 20);
> printk_debug("ACPI:     * FACS\n");
> facs = (acpi_facs_t *) current;
> current += sizeof(acpi_facs_t);
> acpi_create_facs(facs);
> dsdt = (acpi_header_t *) current;
> current += ((acpi_header_t *)AmlCode)->length;
> memcpy((void *)dsdt,(void *)AmlCode, ((acpi_header_t *)AmlCode)->length);
> dsdt->checksum = 0; // don't trust intel iasl compiler to get this right
> dsdt->checksum = acpi_checksum(dsdt, dsdt->length);
> printk_debug("ACPI:     * DSDT @ %08x Length %x\n", dsdt, dsdt->length);
> printk_debug("ACPI:     * FADT\n");
> fadt = (acpi_fadt_t *) current;
> current += sizeof(acpi_fadt_t);
> acpi_create_fadt(fadt,facs,dsdt);
> acpi_add_table(rsdt,fadt);
> printk_info("ACPI: done.\n");
> return current;
>
> +}
> Index: src/mainboard/via/epia-cn/Options.lb
>
> --- src/mainboard/via/epia-cn/Options.lb	(revision 0)
> +++ src/mainboard/via/epia-cn/Options.lb	(revision 0)
> @@ -0,0 +1,151 @@
> +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 COREBOOT_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 PAYLOAD_SIZE
> +uses _ROMBASE
> +uses _RAMBASE
> +uses XIP_ROM_SIZE
> +uses XIP_ROM_BASE
> +uses HAVE_MP_TABLE
> +uses HAVE_ACPI_TABLES
> +uses CROSS_COMPILE
> +uses CC
> +uses HOSTCC
> +uses OBJCOPY
> +uses DEFAULT_CONSOLE_LOGLEVEL
> +uses MAXIMUM_CONSOLE_LOGLEVEL
> +uses CONFIG_CONSOLE_SERIAL8250
> +uses CONFIG_UDELAY_TSC
> +uses CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2
> +uses CONFIG_PCI_ROM_RUN
> +uses CONFIG_CONSOLE_VGA
> +uses CONFIG_MAX_PCI_BUSES 
> +uses TTYS0_BAUD
> +uses CONFIG_CHIP_NAME
> +uses CONFIG_VIDEO_MB
> +uses CONFIG_IOAPIC
>
> +# default IOAPIC
> +default CONFIG_IOAPIC = 0
>
> +# default MB size
> +default CONFIG_VIDEO_MB = 32
>
> +## ROM_SIZE is the size of boot ROM that this board will use.
> +default ROM_SIZE  = 512*1024
>
> +###
> +### Build options
> +###
> +default CONFIG_PCI_ROM_RUN=0
> +default CONFIG_CONSOLE_VGA=0
>
> +default CONFIG_CHIP_NAME=1
>
> +##
> +## Build code for the fallback boot
> +##
> +default HAVE_FALLBACK_BOOT=1
>
> +##
> +## no MP table
> +##
> +default HAVE_MP_TABLE=0
>
> +##
> +## Use TSC for udelay.
> +##
> +default CONFIG_UDELAY_TSC=1
> +default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
>
> +##
> +## Build code to reset the motherboard from coreboot
> +##
> +default HAVE_HARD_RESET=0
>
> +##
> +## Build code to export a programmable irq routing table
> +##
> +default HAVE_PIRQ_TABLE=1
> +default IRQ_SLOT_COUNT=10
>
> +##
> +## Build code to load acpi tables
> +##
> +default HAVE_ACPI_TABLES=1
>
> +##
> +## Build code to export a CMOS option table
> +##
> +default HAVE_OPTION_TABLE=1
>
> +###
> +### coreboot layout values
> +###
>
> +## ROM_IMAGE_SIZE is the amount of space to allow coreboot to occupy.
> +default ROM_IMAGE_SIZE = 128*1024
> +default FALLBACK_SIZE = 512*1024
>
> +##
> +## 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"
>
> +##
> +## Set this to the max PCI bus number you 
> +## would ever use for PCI config IO.
> +## Setting this number very high will make 
> +## pci_locate_device take a long time when
> +## it can't find a device.
> +##
> +default CONFIG_MAX_PCI_BUSES = 5
>
> +end
> Index: src/mainboard/via/epia-cn/failover.c
>
> --- src/mainboard/via/epia-cn/failover.c	(revision 0)
> +++ src/mainboard/via/epia-cn/failover.c	(revision 0)
> @@ -0,0 +1,34 @@
> +#define ASSEMBLY 1
> +#include <stdint.h>
> +#include <device/pci_def.h>
> +#include <device/pci_ids.h>
> +#include <arch/io.h>
> +#include "arch/romcc_io.h"
> +#include "pc80/mc146818rtc_early.c"
>
> +static unsigned long main(unsigned long bist)
> +{
> +#if 0
> /* This is the primary cpu how should I boot? */
> if (do_normal_boot()) {
> goto normal_image;
> }
> else {
> goto fallback_image;
> }
> normal_image:
> asm volatile ("jmp __normal_image"
> : /* outputs */ 
> : "a" (bist) /* inputs */
> : /* clobbers */
> );
> cpu_reset:
> asm volatile ("jmp __cpu_reset"
> : /* outputs */ 
> : "a"(bist) /* inputs */
> : /* clobbers */
> );
> fallback_image:
>
> +#endif
> return bist;
>
> +}
> Index: src/mainboard/via/epia-cn/chip.h
> ===================================================================
> --- src/mainboard/via/epia-cn/chip.h	(revision 0)
> +++ src/mainboard/via/epia-cn/chip.h	(revision 0)
> @@ -0,0 +1,5 @@
> +extern struct chip_operations mainboard_via_epia_cn_ops;
>
> +struct mainboard_via_epia_cn_config {
> int nothing;
>
> +};
> Index: src/mainboard/via/epia-cn/auto.c
> ===================================================================
> --- src/mainboard/via/epia-cn/auto.c	(revision 0)
> +++ src/mainboard/via/epia-cn/auto.c	(revision 0)
> @@ -0,0 +1,185 @@
> +/*
> This file is part of the coreboot project.
> Copyright (C) 2008 VIA Technologies, Inc.
> Copyright (C) 2008 Aaron Lwe
> 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>
> +#if 0
> +#include <cpu/x86/lapic.h>
> +#endif
> +#include <arch/io.h>
> +#include <device/pnp_def.h>
> +#include <arch/romcc_io.h>
> +#include <arch/hlt.h>
> +#include "pc80/serial.c"
> +#include "arch/i386/lib/console.c"
> +#include "ram/ramtest.c"
> +#include "northbridge/via/cn700/raminit.h"
> +#include "cpu/x86/mtrr/earlymtrr.c"
> +#include "cpu/x86/bist.h"
>
> +/*
> */
>
> +void udelay(int usecs) 
> +{
> int i;
> for(i = 0; i < usecs; i++)
> outb(i&0xff, 0x80);
>
> +}
>
> +#include "lib/delay.c"
> +#include "cpu/x86/lapic/boot_cpu.c"
> +#include "debug.c"
>
> +#include "southbridge/via/vt8237r/vt8237r_early_smbus.c"
>
> +#include "southbridge/via/vt8235/vt8235_early_serial.c"
> +static void memreset_setup(void)
> +{
> +}
>
> +static inline int spd_read_byte(unsigned device, unsigned address)
> +{
> return smbus_read_byte(device, address);
>
> +}
>
> +#include "northbridge/via/cn700/raminit.c"
>
> +static void enable_mainboard_devices(void) 
> +{
> device_t dev;
> u8 reg;
>   /*
> disable sata and move ide device from 00:0f.1 to 00:0f.0
> */
> dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT8237R_SATA), 0);
> if (dev != PCI_DEV_INVALID) {
> // enable backdoor
> reg = pci_read_config8(dev, 0xd1);
> reg |= 0x08;
> pci_write_config8(dev, 0xd1, reg);
> // enable pata
> reg = pci_read_config8(dev, 0x49);
> reg |= 0x80;
> pci_write_config8(dev, 0x49, reg);
> }
> else
> print_debug("no sata device \r\n");
> dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
> if (dev == PCI_DEV_INVALID)
> die("Southbridge not found!!!\n");
> pci_write_config8(dev, 0x50, 0x8a); // disable mc97 and ehci
> pci_write_config8(dev, 0x51, 0x9d); // disable USB device mode

Hmm there are some disable enable generic bits, check vt8237r_enable
and friends.
> +}
>
> +static void enable_shadow_ram(void) 
> +{
> device_t dev = 0x3000; /* dram device */
> unsigned char shadowreg;
> /* dev 0 for southbridge */
> shadowreg = pci_read_config8(dev, 0x83);
> /* 0xf0000-0xfffff */
> shadowreg |= 0x30;
> pci_write_config8(dev, 0x83, shadowreg);
> pci_write_config8(dev, 0x80, 0xff);
> pci_write_config8(dev, 0x81, 0xff);
> pci_write_config8(dev, 0x82, 0xff);
> dev = 0x7000;	/* vlink device */
> pci_write_config8(dev, 0x61, 0xff);
> pci_write_config8(dev, 0x62, 0xff);
> pci_write_config8(dev, 0x64, 0xff);
> shadowreg = pci_read_config8(dev, 0x63);
> shadowreg |= 0x30;
> pci_write_config8(dev, 0x63, shadowreg);

this can be moved to NB code. Check k8t890_ctrl.c
> +}
>
> +static const struct mem_controller ctrl = {
> .d0f0 = 0x0000,
> .d0f2 = 0x2000,
> .d0f3 = 0x3000,
> .d0f4 = 0x4000,
> .d0f7 = 0x7000,
> .d1f0 = 0x8000,
> .channel0 = { 0x50 },
>
> +};
>
> +static void main(unsigned long bist)
> +{
> unsigned long x;
> device_t dev;
> /* multifunction for northbridge */
> pci_write_config8(ctrl.d0f0, 0x4f, 0x01);
> enable_vt8235_serial();
> uart_init();
> console_init();
> print_spew("In auto.c:main()\r\n");
> enable_smbus();
> smbus_fixup(&ctrl);
> if (bist == 0) {
> print_debug("doing early_mtrr\r\n");
> early_mtrr_init();
> }
> /* Halt if there was a built in self test failure */
> report_bist_failure(bist);
> print_debug(" Enabling mainboard devices\r\n");
> enable_mainboard_devices();
> print_debug(" Enabling shadow ram\r\n");
> enable_shadow_ram();
> ddr_ram_setup(&ctrl);
> /* Check all of memory */
>
> +#if 0
> ram_check(0x0, 0x1000);
>
> +#endif
> +#if 0
> static const struct {
> unsigned long lo, hi;
> } check_addrs[] = {
> /* Check 16MB of memory @ 0*/
> { 0x000fff00, 0x001000ff },
>
> +#if TOTAL_CPUS > 1
> /* Check 16MB of memory @ 2GB */
> { 0x80000000, 0x81000000 },
>
> +#endif
> };
> int i;
> for(i = 0; i < sizeof(check_addrs)/sizeof(check_addrs[0]); i++) {
> ram_check(check_addrs[i].lo, check_addrs[i].hi);
> }
>
> +#endif
> print_spew("Leaving auto.c:main()\r\n");
>
> +}
> Index: src/mainboard/via/epia-cn/cmos.layout
> ===================================================================
> --- src/mainboard/via/epia-cn/cmos.layout	(revision 0)
> +++ src/mainboard/via/epia-cn/cmos.layout	(revision 0)
> @@ -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
> Index: src/mainboard/via/epia-cn/mainboard.c
>
> --- src/mainboard/via/epia-cn/mainboard.c	(revision 0)
> +++ src/mainboard/via/epia-cn/mainboard.c	(revision 0)
> @@ -0,0 +1,47 @@
> +#include <console/console.h>
> +#include <device/device.h>
> +#include <device/pci.h>
> +#include <device/pci_ids.h>
> +#include <device/pci_ops.h>
> +#include <arch/io.h>
> +#include "chip.h"
>
> +void vga_enable_console();
>
> +/*
> +static void vga_fixup(void) {
>    // we do this right here because:
>    // - all the hardware is working, and some VGA bioses seem to need
>    //   that
>    // - we need page 0 below for linuxbios tables.
>    printk_debug("INSTALL REAL-MODE IDT\n");
>    setup_realmode_idt();
>    printk_debug("DO THE VGA BIOS\n");
>    do_vgabios();
>    post_code(0x93);
> vga_enable_console();
>
> +}
>
> +void write_protect_vgabios(void)
> +{
> device_t dev;
> printk_info("write_protect_vgabios\n");
> // there are two possible devices. Just do both.
> dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3344, 0);
> if(dev)
> pci_write_config8(dev, 0x61, 0xaa);
>
> +// 	dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3123, 0);
> //	if(dev)
> //		pci_write_config8(dev, 0x61, 0xaa);
>
> +}
> +*/
>
> +struct chip_operations mainboard_via_epia_cn_ops = {
> CHIP_NAME("VIA EPIA-CN Mainboard")
>
> +};
> Index: src/northbridge/via/cn700/raminit.c
>
> --- src/northbridge/via/cn700/raminit.c	(revision 3300)
> +++ src/northbridge/via/cn700/raminit.c	(working copy)
> @@ -1,6 +1,8 @@
>  /*
> This file is part of the coreboot project.
> Copyright (C) 2008 VIA Technologies, Inc.
> Copyright (C) 2008 Aaron Lwe
> Copyright (C) 2007 Corey Osgood
> This program is free software; you can redistribute it and/or modify
>
> @@ -23,7 +25,7 @@
>  #include <delay.h>
>  #include "cn700.h"
>
> -//#define DEBUG_RAM_SETUP 1
> +#define DEBUG_RAM_SETUP 1
>
> #ifdef DEBUG_RAM_SETUP
>  #define PRINT_DEBUG_MEM(x)		print_debug(x)
> @@ -43,35 +45,18 @@
>  {
>    u8 reg;
> /* TODO: Support for multiple DIMMs. */
> reg = pci_read_config8(dev, DRAM_MISC_CTL);
> reg = pci_read_config8(dev, 0x6b);

why?
> reg &= 0xf8;		/* Clear bits 2-0. */
>    reg |= command;
> pci_write_config8(dev, DRAM_MISC_CTL, reg);
>
> pci_write_config8(dev, 0x6b, reg);
>
> PRINT_DEBUG_MEM("    Sending RAM command 0x");
> PRINT_DEBUG_MEM_HEX8(reg);
> PRINT_DEBUG_MEM(" to 0x");
> PRINT_DEBUG_MEM_HEX32(0 + addr_offset);
> PRINT_DEBUG_MEM("\r\n");
> read32(0 + addr_offset);
>
> }
>
> -/**
> Configure the bus between the cpu and the northbridge. This might be able to
> be moved to post-ram code in the future. For the most part, these registers
> should not be messed around with. These are too complex to explain short of
> copying the datasheets into the comments, but most of these values are from
> the BIOS Porting Guide, so they should work on any board. If they don't,
> try the values from your factory BIOS.
> TODO: Changing the DRAM frequency doesn't work (hard lockup)
> @param dev The northbridge's CPU Host Interface (D0F2)
> */
>
> static void c7_cpu_setup(device_t dev)
>  {
>    /* Host bus interface registers (D0F2 0x50-0x67) */
> @@ -82,8 +67,8 @@
>    pci_write_config8(dev, 0x52, 0x6f);
>    /* Arbitration */
>    pci_write_config8(dev, 0x53, 0x88);
> /* Miscellaneous Control */
> pci_write_config8(dev, 0x54, 0x10);
> // Miscellaneous Control
> pci_write_config8(dev, 0x54, 0x1e);
> pci_write_config8(dev, 0x55, 0x16);
> /* Write Policy */
> pci_write_config8(dev, 0x56, 0x01);
>
> @@ -94,8 +79,8 @@
>     *	100 : 266MHz	101 : 333MHz
>     *	110/111 : Reserved */
>    //pci_write_config8(dev, 0x57, 0x60);//set 200MHz dram clock
> /* CPU Miscellaneous Control */
> pci_write_config8(dev, 0x59, 0x60);
> // CPU Miscellaneous Control
> pci_write_config8(dev, 0x59, 0x44);	
> /* Write Policy */
> pci_write_config8(dev, 0x5d, 0xb2);
> /* Bandwidth Timer */
>
> @@ -111,18 +96,18 @@
>    pci_write_config8(dev, 0x63, 0xff);
>    pci_write_config8(dev, 0x64, 0xff);
>    pci_write_config8(dev, 0x65, 0x0f);
> /* Read Line Burst DRDY# Timing Control */
> // Read Line Burst DRDY# Timing Control
> pci_write_config8(dev, 0x66, 0xff);
> pci_write_config8(dev, 0x67, 0x70);
> pci_write_config8(dev, 0x67, 0x30);
> /* Host Bus IO Circuit (See datasheet) */
> /* Host Address Pullup/down Driving */
> pci_write_config8(dev, 0x70, 0x33);
> pci_write_config8(dev, 0x71, 0x00);
> pci_write_config8(dev, 0x72, 0x33);
> pci_write_config8(dev, 0x73, 0x00);
> /* Miscellaneous Control */
> pci_write_config8(dev, 0x74, 0x00);
> // Host Bus IO Circuit (See datasheet)
> // Host Address Pullup/down Driving
> pci_write_config8(dev, 0x70, 0x11);
> pci_write_config8(dev, 0x71, 0x11);
> pci_write_config8(dev, 0x72, 0x11);
> pci_write_config8(dev, 0x73, 0x11);
> // Miscellaneous Control
> pci_write_config8(dev, 0x74, 0x35);
> /* AGTL+ I/O Circuit */
> pci_write_config8(dev, 0x75, 0x28);
> /* AGTL+ Compensation Status */
>
> @@ -135,206 +120,286 @@
>    pci_write_config8(dev, 0x79, 0xaa);
>    /* Address Strobe Input Delay Control */
>    pci_write_config8(dev, 0x7a, 0x24);
> /* Address CKG Rising/Falling Time Control */
> pci_write_config8(dev, 0x7b, 0x00);
> // Address CKG Rising/Falling Time Control
> pci_write_config8(dev, 0x7b, 0xaa);
> /* Address CKG Clock Rising/Falling Time Control */
> pci_write_config8(dev, 0x7c, 0x00);
> /* Undefined (can't remember why I did this) */
> pci_write_config8(dev, 0x7d, 0x6d);
> pci_write_config8(dev, 0x7d, 0x6d);
> pci_write_config8(dev, 0x7e, 0x00);
> pci_write_config8(dev, 0x7f, 0x00);
> pci_write_config8(dev, 0x80, 0x1b);
> pci_write_config8(dev, 0x81, 0x0a);
> pci_write_config8(dev, 0x82, 0x0a);
> pci_write_config8(dev, 0x83, 0x0a);
>
> }
>
> -/**
> Set up various ram and other control registers statically. Some of these may
> not be needed, other should be done with spd info, but that's a project for
> the future
> */
>
> -static void sdram_set_registers(const struct mem_controller *ctrl)
> +void sdram_set_size(const struct mem_controller *ctrl)
>  {
> /* DQ/DQS Strength Control */
> pci_write_config8(ctrl->d0f3, 0xd0, 0x88);
> pci_write_config8(ctrl->d0f3, 0xd1, 0x8b);
> pci_write_config8(ctrl->d0f3, 0xd2, 0x89);
> /* SMM and APIC Decoding */
> pci_write_config8(ctrl->d0f3, 0x86, 0x2d);
> /* Driving selection */
> /* DQ / DQS ODT Driving and Range Select */
> pci_write_config8(ctrl->d0f3, 0xd5, 0x8a);
> /* Memory Pads Driving and Range Select */
> pci_write_config8(ctrl->d0f3, 0xd6, 0xaa);
> /* DRAM Driving – Group DQS */
> pci_write_config8(ctrl->d0f3, 0xe0, 0xee);
> /* DRAM Driving – Group DQ (DQ, MPD, DQM) */
> pci_write_config8(ctrl->d0f3, 0xe2, 0xac);//ba
> /* DRAM Driving – Group CS */
> pci_write_config8(ctrl->d0f3, 0xe4, 0x66);
> /* DRAM Driving – Group MA */
> pci_write_config8(ctrl->d0f3, 0xe8, 0x86);
> /* DRAM Driving – Group MCLK */
> pci_write_config8(ctrl->d0f3, 0xe6, 0xaa);
> u8 density, ranks, result, col;
> /* ODT (some are set with driving select above) */
> /* Memory Pad ODT Pullup / Pulldown Control */
> pci_write_config8(ctrl->d0f3, 0xd4, 0x0a);
> /* Memory Ranks ODT Lookup Table */
> pci_write_config8(ctrl->d0f3, 0xd8, 0x00);//was 1
> /* Compensation Control */
> pci_write_config8(ctrl->d0f3, 0xd3, 0x89);//enable auto compensation
> /* MCLKO Phase Control */
> pci_write_config8(ctrl->d0f3, 0x91, 0x02);
> /* CS/CKE Clock Phase Control */
> pci_write_config8(ctrl->d0f3, 0x92, 0x06);
> /* SCMD/MA Clock Phase Control */
> pci_write_config8(ctrl->d0f3, 0x93, 0x07);
> /* Channel A DQS Input Capture Range Control */
> pci_write_config8(ctrl->d0f3, 0x78, 0x83);
> /* DQS Input Capture Range Control */
> /* Set in accordance with the BIOS update note */
> pci_write_config8(ctrl->d0f3, 0x7a, 0x00);
> /* DQS Input Delay Offset Control */
> pci_write_config8(ctrl->d0f3, 0x7c, 0x00);
> /* SDRAM ODT Control */
> pci_write_config8(ctrl->d0f3, 0xda, 0x80);
> /* DQ/DQS CKG Output Delay Control - I */
> pci_write_config8(ctrl->d0f3, 0xdc, 0xff);
> /* DQ/DQS CKG Output Delay Control - II */
> pci_write_config8(ctrl->d0f3, 0xdd, 0xff);
> /* DQS / DQ CKG Duty Cycle Control */
> pci_write_config8(ctrl->d0f3, 0xec, 0x88);
> /* MCLK Output Duty Control */
> pci_write_config8(ctrl->d0f3, 0xee, 0x00);
> pci_write_config8(ctrl->d0f3, 0xed, 0x10);
> /* DQS CKG Input Delay Control */
> pci_write_config8(ctrl->d0f3, 0xef, 0x10);
> ranks = spd_read_byte(ctrl->channel0[0], 5);
> ranks = (ranks & 0x07) + 1;
> density = spd_read_byte(ctrl->channel0[0], 31);
> switch (density)
> {
> case 0x80:
> 	result = 0x08;	// 512MB / 64MB = 0x08
> 	break;
> case 0x40:
> 	result = 0x04;
> 	break;
> case 0x20:
> 	result = 0x02;
> 	break;
> case 0x10:
> 	result = 0xff;	// 16GB
> 	break;
> case 0x08:
> 	result = 0xff;	// 8GB
> 	break;
> case 0x04:
> 	result = 0xff;	// 4GB
> 	break;
> case 0x02:
> 	result = 0x20;	// 2GB
> 	break;
> case 0x01:
> 	result = 0x10;	// 1GB
> 	break;
> }
> pci_write_config8(ctrl->d0f3, 0x77, 0x9d);
> pci_write_config8(ctrl->d0f3, 0x79, 0x83);
> pci_write_config16(ctrl->d0f3, 0x88, 0x0020);
> pci_write_config8(ctrl->d0f4, 0xa7, 0x80);
> if (result == 0xff)
> die("dram module size too big, not supported by cn700\r\n");
>
> /* VLink Control */
> pci_write_config8(ctrl->d0f7, 0xb0, 0x05);
> pci_write_config8(ctrl->d0f7, 0xb1, 0x01);
> /* Memory base */
> pci_write_config16(ctrl->d1f0, 0x20, 0xfb00);
> /* Memory limit */
> pci_write_config16(ctrl->d1f0, 0x22, 0xfcf0);
> /* Prefetch memory base */
> pci_write_config16(ctrl->d1f0, 0x24, 0xf400);
> /* Prefetch memory limit */
> pci_write_config16(ctrl->d1f0, 0x26, 0xf7f0);
> /* PCI to PCI bridge control */
> pci_write_config16(ctrl->d1f0, 0x3e, 0x0008);
> /* CPU to PCI flow control 1 */
> pci_write_config8(ctrl->d1f0, 0x40, 0x83);
> pci_write_config8(ctrl->d1f0, 0x41, 0xc3);//clear reset error, set to 43
> pci_write_config8(ctrl->d1f0, 0x42, 0xe2);
> pci_write_config8(ctrl->d1f0, 0x43, 0x44);
> pci_write_config8(ctrl->d1f0, 0x44, 0x34);
> pci_write_config8(ctrl->d1f0, 0x45, 0x72);
> pci_write_config8(ctrl->d0f3, 0x40, result);
> pci_write_config8(ctrl->d0f3, 0x48, 0x00);
> if (ranks == 2) {
> pci_write_config8(ctrl->d0f3, 0x41, result * ranks);
> pci_write_config8(ctrl->d0f3, 0x49, result);
> }
> // size mirror
> pci_write_config8(ctrl->d0f7, 0xe5, (result * ranks) << 2);
> pci_write_config8(ctrl->d0f7, 0x57, (result * ranks) << 2);
> // Low Top Address
> pci_write_config8(ctrl->d0f3, 0x84, 0x00);
> pci_write_config8(ctrl->d0f3, 0x85, (result * ranks) << 2);
> pci_write_config8(ctrl->d0f3, 0x88, (result * ranks) << 2);
> /* Disable cross bank/multi page mode */
> pci_write_config8(ctrl->d0f3, DDR_PAGE_CTL, 0x80);
> pci_write_config8(ctrl->d0f3, DRAM_REFRESH_COUNTER, 0x00);
> // Physical-Virtual Mapping
> if (ranks == 2)
> pci_write_config8(ctrl->d0f3, 0x54, 1 << 7 | 0 << 4 | 1 << 3 | 1 << 0);
> if (ranks == 1)
> pci_write_config8(ctrl->d0f3, 0x54, 1 << 7 | 0 << 4);
> pci_write_config8(ctrl->d0f3, 0x55, 0x00);
> // virtual rank interleave, disable
> pci_write_config32(ctrl->d0f3, 0x58, 0x00);
> /* Set WR=5 and RFC */
> pci_write_config8(ctrl->d0f3, 0x61, 0xc7);
> /* Set CAS=5 */
> pci_write_config8(ctrl->d0f3, 0x62, 0xaf);
> // MA Map Type
> result = spd_read_byte(ctrl->channel0[0], 17);
> if (result == 8) {
> col = spd_read_byte(ctrl->channel0[0], 4);
> switch (col)
> {
> 	case 10:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0xa0);
> 		break;
> 	case 11:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0xc0);
> 		break;
> 	case 12:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0xe0);
> 		break;
> }
> }
> else if (result == 4) {
> col = spd_read_byte(ctrl->channel0[0], 4);
> switch (col)
> {
> 	case 9:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0x00);
> 		break;
> 	case 10:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0x20);
> 		break;
> 	case 11:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0x40);
> 		break;
> 	case 12:
> 		pci_write_config8(ctrl->d0f3, 0x50, 0x60);
> 		break;
> }
> }
> pci_write_config8(ctrl->d0f3, 0x51, 0x00);
>
> +}
>
> +void sdram_set_registers(const struct mem_controller *ctrl)
> +{
> u8 reg;
> // Set WR=5
> pci_write_config8(ctrl->d0f3, 0x61, 0xe0);
> // Set CAS=4
> pci_write_config8(ctrl->d0f3, 0x62, 0xfa);
> // dram timing-3
> pci_write_config8(ctrl->d0f3, 0x63, 0xca);
> /* Set to DDR2 sdram, BL=8 (0xc8, 0xc0 for bl=4) */
> pci_write_config8(ctrl->d0f3, 0x6c, 0xc8);
> /* Allow manual dll reset */
> // dram timing-4
> pci_write_config8(ctrl->d0f3, 0x64, 0xcc);
> // DIMM command / Address Selection
> pci_write_config8(ctrl->d0f3, 0x67, 0x00);
> // Disable cross bank/multi page mode
> pci_write_config8(ctrl->d0f3, 0x69, 0x00);
> // disable refresh now
> pci_write_config8(ctrl->d0f3, 0x6a, 0x00);
> // frequency 100MHZ
> pci_write_config8(ctrl->d0f3, 0x90, 0x00);
> pci_write_config8(ctrl->d0f2, 0x57, 0x18);
> // Allow manual dll reset
> pci_write_config8(ctrl->d0f3, 0x6b, 0x10);
> // MA Map Type
> pci_write_config8(ctrl->d0f3, 0x52, 0x33);
> pci_write_config8(ctrl->d0f3, 0x53, 0x3f);
> pci_write_config8(ctrl->d0f3, 0x6e, 0x89);
> pci_write_config8(ctrl->d0f3, 0x67, 0x50);
> // Set to DDR2 sdram, BL=8 (0xc8, 0xc0 for bl=4)
> pci_write_config8(ctrl->d0f3, 0x6c, 0xc8);
> // DRAM Bus Turn-Around Setting
> pci_write_config8(ctrl->d0f3, 0x60, 0x03);
> // DRAM Arbitration Control
> pci_write_config8(ctrl->d0f3, 0x66, 0x80);
> // DQS Tuning: testing on a couple different boards has shown this is
> // static, or close enough that it can be. Which is good, because the
> // tuning function used too many registers
> // DQS Output Delay for CHannel A
> pci_write_config8(ctrl->d0f3, 0x70, 0x00);
> // MD Output Delay for Channel A
> pci_write_config8(ctrl->d0f3, 0x71, 0x01);
> pci_write_config8(ctrl->d0f3, 0x73, 0x01);
> // dram arbitration timer
> pci_write_config8(ctrl->d0f3, 0x65, 0xd9);
> // dram signal timing control
> pci_write_config8(ctrl->d0f3, 0x74, 0x01);
> pci_write_config8(ctrl->d0f3, 0x75, 0x01);
> pci_write_config8(ctrl->d0f3, 0x76, 0x06);
> pci_write_config8(ctrl->d0f3, 0x77, 0x92);
> pci_write_config8(ctrl->d0f3, 0x78, 0x83);
> pci_write_config8(ctrl->d0f3, 0x79, 0x83);
> pci_write_config8(ctrl->d0f3, 0x7a, 0x00);
> pci_write_config8(ctrl->d0f3, 0x7b, 0x10);
> // dram clocking control
> pci_write_config8(ctrl->d0f3, 0x91, 0x01);
> // CS/CKE Clock Phase Control
> pci_write_config8(ctrl->d0f3, 0x92, 0x02);
> // SCMD/MA Clock Phase Control
> pci_write_config8(ctrl->d0f3, 0x93, 0x02);
> // DCLKO Feedback Mode Output Control
> pci_write_config8(ctrl->d0f3, 0x94, 0x00);
> pci_write_config8(ctrl->d0f3, 0x9d, 0x0f);
> /* Only enable bank 1, for now */
> /* TODO: Multiple, dynamically controlled bank enables */
> pci_write_config8(ctrl->d0f3, 0x54, 0x80);
> pci_write_config8(ctrl->d0f3, 0x55, 0x00);
> /* Set to 2T, MA Map type 1.
> * TODO: Needs to become dynamic */
> pci_write_config16(ctrl->d0f3, 0x50, 0x0020);
> // SDRAM ODT Control
> pci_write_config8(ctrl->d0f3, 0xda, 0x80);
> // Channel A DQ/DQS CKG Output Delay Control
> pci_write_config8(ctrl->d0f3, 0xdc, 0x54);
> // Channel A DQ/DQS CKG Output Delay Control
> pci_write_config8(ctrl->d0f3, 0xdd, 0x55);
> // odt lookup table
> pci_write_config8(ctrl->d0f3, 0xd8, 0x01);
> pci_write_config8(ctrl->d0f3, 0xd9, 0x0a);
> /* BA0-2 Selection. Don't mess with */
> pci_write_config8(ctrl->d0f3, 0x52, 0x33);
> pci_write_config8(ctrl->d0f3, 0x53, 0x3f);
> // ddr sdram control
> pci_write_config8(ctrl->d0f3, 0x6d, 0xc0);
> pci_write_config8(ctrl->d0f3, 0x6f, 0x41);
> // DQ/DQS Strength Control
> pci_write_config8(ctrl->d0f3, 0xd0, 0xaa);
> // Compensation Control
> pci_write_config8(ctrl->d0f3, 0xd3, 0x01);//enable auto compensation
> // ODT (some are set with driving select above)
> pci_write_config8(ctrl->d0f3, 0xd4, 0x80);
> pci_write_config8(ctrl->d0f3, 0xd5, 0x8a);
> // Memory Pads Driving and Range Select
> pci_write_config8(ctrl->d0f3, 0xd6, 0xaa);
> pci_write_config8(ctrl->d0f3, 0xe0, 0xee);
> pci_write_config8(ctrl->d0f3, 0xe2, 0xac);
> pci_write_config8(ctrl->d0f3, 0xe4, 0x66);
> pci_write_config8(ctrl->d0f3, 0xe6, 0x33);
> pci_write_config8(ctrl->d0f3, 0xe8, 0x86);
> // DQS / DQ CKG Duty Cycle Control
> pci_write_config8(ctrl->d0f3, 0xec, 0x00);
> // MCLK Output Duty Control
> pci_write_config8(ctrl->d0f3, 0xee, 0x00);
> // DQS CKG Input Delay Control
> pci_write_config8(ctrl->d0f3, 0xef, 0x10);
> /* Disable bank interleaving. This feature seems useless anyways */
> pci_write_config32(ctrl->d0f3, 0x58, 0x00000000);
> pci_write_config8(ctrl->d0f3, 0x88, 0x08);
> // dram duty control
> pci_write_config8(ctrl->d0f3, 0xed, 0x10);
> /* Some DQS control stuffs */
> pci_write_config8(ctrl->d0f3, 0x74, 0x04);
> pci_write_config8(ctrl->d0f3, 0x75, 0x04);
> pci_write_config8(ctrl->d0f3, 0x76, 0x00);
> // SMM and APIC deocoding
> pci_write_config8(ctrl->d0f3, 0x86, 0x29);
> // SMM and APIC decoding mirror
> pci_write_config8(ctrl->d0f7, 0xe6, 0x29);
> // dram module configuration
> pci_write_config8(ctrl->d0f3, 0x6e, 0x89);
>
> }
>
> -/**
> Set up dram size according to spd data. Eventually, DRAM timings should be
> done in a similar manner.
> @param ctrl The northbridge devices and spd addresses.
> */
>
> -static void sdram_set_spd_registers(const struct mem_controller *ctrl)
> +void sdram_set_post(const struct mem_controller *ctrl)
>  {
> u8 spd_data, spd_data2;
> device_t dev = ctrl->d0f3;
> /* Enable multipage mode. */
> pci_write_config8(dev, 0x69, 0x03);
> /* Enable refresh. */
> pci_write_config8(dev, 0x6a, 0x32);
> // vga device
> pci_write_config16(dev, 0xa0, (1 <<15));
> pci_write_config16(dev, 0xa4, 0x0010);
> /* DRAM Bank Size */
> spd_data = spd_read_byte(ctrl->channel0[0],
> 			SPD_DENSITY_OF_EACH_ROW_ON_MODULE);
> /* I know this seems weird. Blame JEDEC/Via. */
> if(spd_data >= 0x10)
> spd_data = spd_data >> 1;
> else
> spd_data = spd_data << 1;
> /* Check for double sided dimm and adjust size accordingly */
> spd_data2 = spd_read_byte(ctrl->channel0[0], SPD_NUM_BANKS_PER_SDRAM);
> /* There should be 4 banks on a single sided dimm,
> * or 8 on a dual sided one */
> spd_data = spd_data * (spd_data2 / 4);
> pci_write_config8(ctrl->d0f3, 0x40, spd_data);
> /* TODO: The rest of the DIMMs */
>
> }
>
> -static void sdram_enable(device_t dev)
> +static void sdram_enable(device_t dev, unsigned long rank_address)
>  {
> int i;
>
> u8 i;
>
> /* 1. Apply NOP. */
> PRINT_DEBUG_MEM("RAM Enable 1: Apply NOP\r\n");
> do_ram_command(dev, RAM_COMMAND_NOP, 0);
> udelay(200);
>
> do_ram_command(dev, RAM_COMMAND_NOP, 0x100);
>
> udelay(100);
>
> read32(rank_address + 0x10);
>
> /* 2. Precharge all. */
>
> udelay(400);
> PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\r\n");
> do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0);
>
> do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0x200);
>
> read32(rank_address + 0x10);
>
> /* 3. Mode register set. */
> PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n");
> do_ram_command(dev, RAM_COMMAND_MRS, 0x2000);//enable dll
> do_ram_command(dev, RAM_COMMAND_MRS, 0x800);//reset dll
>
> do_ram_command(dev, RAM_COMMAND_MRS, 0x120020);//enable dll
>
> read32(rank_address + 0x120000);
>
> read32(rank_address + 0x800);
>
> /* 4. Precharge all again. */
> PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\r\n");
> do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0);
>
> do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0x300);
>
> read32(rank_address + 0x0);
>
> /* 5. Perform 8 refresh cycles. Wait tRC each time. */
> PRINT_DEBUG_MEM("RAM Enable 3: CBR\r\n");
> do_ram_command(dev, RAM_COMMAND_CBR, 0);
> do_ram_command(dev, RAM_COMMAND_CBR, 0x400);
> /* First read is actually done by do_ram_command */
> for(i = 0; i < 7; i++) {
> for(i = 0; i < 8; i++) {
> read32(rank_address + 0x20);
> udelay(100);
> read32(0);
>
> }
>
> /* 6. Mode register set. */
>
> @@ -343,31 +408,51 @@
>    /* (E)MRS values are from the BPG. No direct explanation is given, but 
>     * they should somehow conform to the JEDEC DDR2 SDRAM Specification
>     * (JESD79-2C). */
> do_ram_command(dev, RAM_COMMAND_MRS, 0x0022d8);
> do_ram_command(dev, RAM_COMMAND_MRS, 0x0011d8);
> read32(rank_address + 0x002258);
> read32(rank_address + 0x121c20);
> read32(rank_address + 0x120020);
> /* 7. Mode register set. */
> PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n");
> do_ram_command(dev, RAM_COMMAND_MRS, 0x21c20);//default OCD calibration
> do_ram_command(dev, RAM_COMMAND_MRS, 0x20020);//exit calibration mode
> /* 8. Normal operation */
> PRINT_DEBUG_MEM("RAM Enable 5: Normal operation\r\n");
> do_ram_command(dev, RAM_COMMAND_NORMAL, 0);
> /* Enable multipage mode. */
> pci_write_config8(dev, DDR_PAGE_CTL, 0x83);
> /* Enable refresh. */
> pci_write_config8(dev, DRAM_REFRESH_COUNTER, 0x32);
> /* DQS Tuning: testing on a couple different boards has shown this is
> * static, or close enough that it can be. Which is good, because the
> * tuning function used too many registers. */
> pci_write_config8(dev, CH_A_DQS_OUTPUT_DELAY, 0x00);
> pci_write_config8(dev, CH_A_MD_OUTPUT_DELAY, 0x03);
> read32(rank_address + 0x30);
>
> +}
> /* Enable VGA device with no memory, add memory later. We need this
> * here to enable the actual device, otherwise it won't show up until
> * later and LB will have a fit. */
> pci_write_config16(dev, 0xa0, (1 << 15));
> pci_write_config16(dev, 0xa4, 0x0010);
>
> +void dumpnorth(void)
> +{
> u16 i, j;
> device_t dev;
> for (dev = PCI_DEV(0, 0, 0); dev <= PCI_DEV(0, 1, 0); dev += PCI_DEV(0, 0, 1)) {
> if (dev == PCI_DEV(0, 0, 5) || dev == PCI_DEV(0, 0, 6))
> 	continue;
> print_debug("dumping device ");
> print_debug_hex32(dev);
> print_debug("\r\n");
> for (i = 0; i < 0xFF; i += 0x10) {
> 	print_debug_hex8(i);
> 	print_debug(": ");
> 	for (j = 0; j < 0x10; j++) {
> 		print_debug_hex8(pci_read_config8(dev, i + j));
> 		print_debug(" ");
> 	}
> 	print_debug("\r\n");
> }
> }
>
> }
>
> +void ddr_ram_setup(const struct mem_controller *ctrl)
> +{
> u8 reg;
> c7_cpu_setup(ctrl->d0f2);
> sdram_set_registers(ctrl);
> sdram_set_size(ctrl);
> sdram_enable(ctrl->d0f3, 0);
> reg = pci_read_config8(ctrl->d0f3, 0x41);
> if (reg != 0)
> sdram_enable(ctrl->d0f3, pci_read_config8(ctrl->d0f3, 0x40) << 26);
> sdram_set_post(ctrl);
> dumpnorth();
>
> +}
> Index: src/northbridge/via/cn700/northbridge.c
>
> --- src/northbridge/via/cn700/northbridge.c	(revision 3300)
> +++ src/northbridge/via/cn700/northbridge.c	(working copy)
> @@ -1,6 +1,8 @@
>  /*
> This file is part of the coreboot project.
> Copyright (C) 2008 VIA Technologies, Inc.
> Copyright (C) 2008 Aaron Lwe
> Copyright (C) 2007 Corey Osgood
> This program is free software; you can redistribute it and/or modify
>
> @@ -35,9 +37,8 @@
>  static void memctrl_init(device_t dev)
>  {
>    u16 reg16;
> u8 ranks;
> pci_write_config8(dev, 0x86, 0x2d);
> /* Set up the vga framebuffer size */
> reg16 = (log2(CONFIG_VIDEO_MB) << 12) | (1 << 15);
> pci_write_config16(dev, 0xa0, reg16);
>
> @@ -45,7 +46,23 @@
>    /* Set up VGA timers */
>    pci_write_config8(dev, 0xa2, 0x44);
> pci_write_config16(dev, 0xb0, 0xaa60);
> for (ranks = 0x4b; ranks >= 0x48; ranks--) {
> if (pci_read_config8(dev, ranks)) {
> 	ranks -= 0x48;
> 	break;
> }
> }
> if (ranks == 0x47)
> ranks = 0x00;
> reg16 = 0xaae0;
> reg16 |= ranks;
> // GMINT Misc. FrameBuffer rank
> pci_write_config16(dev, 0xb0, reg16);
> // subsystem id?
> pci_write_config16(dev, 0xb2, 0x5aaa);
> // dunno
> pci_write_config8(dev, 0xb4, 0x0f);
> // AGPCINT Misc.
> pci_write_config8(dev, 0xb8, 0x08);
>
> }
>
> @@ -124,7 +141,7 @@
>
> static void pci_domain_set_resources(device_t dev)
>  {
> static const u8 ramregs[] = {0x40, 0x41, 0x42, 0x43};
> static const u8 ramregs[] = {0x43, 0x42, 0x41, 0x40};
> device_t mc_dev;
>     u32 pci_tolm;
>
> @@ -133,7 +150,7 @@
>          pci_tolm = find_pci_tolm(&dev->link[0]);
>    mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, 
>    			PCI_DEVICE_ID_VIA_CN700_MEMCTRL, 0);
> if (mc_dev) {
>   unsigned long tomk, tolmk;
>   unsigned char rambits;
>
> @@ -141,11 +158,13 @@
> for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) {
> 	unsigned char reg;
> 	reg = pci_read_config8(mc_dev, ramregs[i]);
> 	rambits += reg;
> 	rambits = pci_read_config8(mc_dev, ramregs[i]);
> 	if (rambits != 0)
> 		break;
> }
> tomk = rambits;
> tomk = rambits * 64 * 1024;
> printk_spew("tomk is 0x%x\n", tomk);
> /* Compute the Top Of Low Memory, in Kb */
> tolmk = pci_tolm >> 10;
> if (tolmk >= tomk) {
>
> @@ -156,9 +175,8 @@
>    	idx = 10;
>    	/* TODO: Hole needed? */
>    	ram_resource(dev, idx++, 0, 640); /* first 640k */
> /* Leave a hole for vga */
> ram_resource(dev, idx++, 768, (tolmk - 768 -
> 				(CONFIG_VIDEO_MB * 1024)));
> /* Leave a hole for vga, 0xa0000 - 0xc0000 */
> ram_resource(dev, idx++, 768, (tolmk - 768 - CONFIG_VIDEO_MB * 1024));
> }
> assign_resources(&dev->link[0]);
>
> }
> Index: targets/via/epia-cn/Config.lb
> ===================================================================
> --- targets/via/epia-cn/Config.lb	(revision 0)
> +++ targets/via/epia-cn/Config.lb	(revision 0)
> @@ -0,0 +1,45 @@
> +# Sample config file for EPIA-CN
> +# This will make a target directory of ./epia-CN
>
> +target via_epia_cn
>
> +mainboard via/epia-cn
>
> +option  MAXIMUM_CONSOLE_LOGLEVEL=8
> +option  DEFAULT_CONSOLE_LOGLEVEL=8
> +option  CONFIG_CONSOLE_SERIAL8250=1
> +#
> +# generate the final rom like this: cat vgabios bochsbios coreboot.rom > coreboot.rom.final
> +#
> +option ROM_SIZE=512*1024 - 64 * 1024 - 64 * 1024
>
> +option HAVE_OPTION_TABLE=1
> +option CONFIG_ROM_PAYLOAD=1
> +option HAVE_FALLBACK_BOOT=1
>
> +###
> +### Compute the location and size of where this firmware image
> +### (coreboot plus bootloader) will live in the boot rom chip.
> +###
> +option FALLBACK_SIZE=ROM_SIZE
>
> +## coreboot C code runs at this location in RAM
> +option _RAMBASE=0x00004000
>
> +#
> +###
> +### Compute the start location and size size of
> +### The coreboot bootloader.
> +###
>
> +#
> +# EPIA-CN
> +#
> +romimage "fallback"
> option USE_FALLBACK_IMAGE=1
> option ROM_IMAGE_SIZE=0x20000
> option COREBOOT_EXTRA_VERSION=".0Fallback"
> payload $(HOME)/src/filo-0.5/filo.elf
>
> +end
>
> +buildrom ./coreboot.rom ROM_SIZE "fallback"

[bari]

Acked-by: Bari Ari     "without the ACPI stuff" - cdh
> This is a working patch for epia-cn which uses C7 + CN700 + VT8237R.
> Signed-off-by: Aaron Lwe
>
> -Aaron

[bari]

aaron lwe wrote:
> Hi,
>
> This is a working patch for epia-cn which uses C7 + CN700 + VT8237R.
> Signed-off-by: Aaron Lwe
>
> -Aaron

I was able to test the patch without video.

Awardeco was not able to pull the videobios out of the bios image. Is 
the videobios binary available somewhere?

-Bari

[aaron lwe]

> Awardeco was not able to pull the videobios out of the bios image. Is the
> videobios binary available somewhere?

See http://www.coreboot.org/VGA_support, you can extract vgabios under
linux when booted with factory bios.

-Aaron

[Joseph Smith]

On Tue, 13 May 2008 22:32:26 -0500, bari  wrote:
> aaron lwe wrote:
> > Hi,
> >
> > This is a working patch for epia-cn which uses C7 + CN700 + VT8237R.
> > Signed-off-by: Aaron Lwe
> >
> > -Aaron
>
> I was able to test the patch without video.
>
> Awardeco was not able to pull the videobios out of the bios image. Is
> the videobios binary available somewhere?

Have you tried the dd method?
http://www.coreboot.org/VGA_support