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/*
* HVM ROMBIOS support.
*
* Leendert van Doorn, leendert@watson.ibm.com
* Copyright (c) 2005, International Business Machines Corporation.
* Copyright (c) 2006, Keir Fraser, XenSource Inc.
* Copyright (c) 2011, Citrix Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*/
#include "config.h"
#include "../rombios/config.h"
#include "smbios_types.h"
#include "acpi/acpi2_0.h"
#include "pci_regs.h"
#include "util.h"
#include "hypercall.h"
#include "option_rom.h"
#include <xen/hvm/params.h>
#define ROM_INCLUDE_ROMBIOS
#define ROM_INCLUDE_VGABIOS
#define ROM_INCLUDE_ETHERBOOT
#include "roms.inc"
#define ROMBIOS_BEGIN 0x000F0000
#define ROMBIOS_SIZE 0x00010000
#define ROMBIOS_MAXOFFSET 0x0000FFFF
#define ROMBIOS_END (ROMBIOS_BEGIN + ROMBIOS_SIZE)
extern unsigned char dsdt_anycpu[], dsdt_15cpu[];
extern int dsdt_anycpu_len, dsdt_15cpu_len;
static void rombios_setup_e820(void)
{
/*
* 0x9E000-0x09F000: Stack.
* 0x9FC00-0x0A0000: Extended BIOS Data Area (EBDA).
* ...
* 0xE0000-0x0F0000: PC-specific area. We place various tables here.
* 0xF0000-0x100000: System BIOS.
*/
*E820_NR = build_e820_table(E820, 0x9E000, 0xE0000);
dump_e820_table(E820, *E820_NR);
}
static void rombios_setup_bios_info(void)
{
struct rombios_info *info;
info = (struct rombios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
memset(info, 0, sizeof(*info));
}
static void rombios_load_roms(void)
{
int option_rom_sz = 0, vgabios_sz = 0, etherboot_sz = 0;
uint32_t etherboot_phys_addr = 0, option_rom_phys_addr = 0;
switch ( virtual_vga )
{
case VGA_cirrus:
printf("Loading Cirrus VGABIOS ...\n");
memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
vgabios_cirrusvga, sizeof(vgabios_cirrusvga));
vgabios_sz = round_option_rom(sizeof(vgabios_cirrusvga));
break;
case VGA_std:
printf("Loading Standard VGABIOS ...\n");
memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
vgabios_stdvga, sizeof(vgabios_stdvga));
vgabios_sz = round_option_rom(sizeof(vgabios_stdvga));
break;
case VGA_pt:
printf("Loading VGABIOS of passthroughed gfx ...\n");
vgabios_sz = round_option_rom(
(*(uint8_t *)(VGABIOS_PHYSICAL_ADDRESS+2)) * 512);
break;
default:
printf("No emulated VGA adaptor ...\n");
break;
}
etherboot_phys_addr = VGABIOS_PHYSICAL_ADDRESS + vgabios_sz;
if ( etherboot_phys_addr < OPTIONROM_PHYSICAL_ADDRESS )
etherboot_phys_addr = OPTIONROM_PHYSICAL_ADDRESS;
etherboot_sz = scan_etherboot_nic(OPTIONROM_PHYSICAL_END,
etherboot_phys_addr,
etherboot);
option_rom_phys_addr = etherboot_phys_addr + etherboot_sz;
option_rom_sz = pci_load_option_roms(OPTIONROM_PHYSICAL_END,
option_rom_phys_addr);
printf("Option ROMs:\n");
if ( vgabios_sz )
printf(" %05x-%05x: VGA BIOS\n",
VGABIOS_PHYSICAL_ADDRESS,
VGABIOS_PHYSICAL_ADDRESS + vgabios_sz - 1);
if ( etherboot_sz )
printf(" %05x-%05x: Etherboot ROM\n",
etherboot_phys_addr,
etherboot_phys_addr + etherboot_sz - 1);
if ( option_rom_sz )
printf(" %05x-%05x: PCI Option ROMs\n",
option_rom_phys_addr,
option_rom_phys_addr + option_rom_sz - 1);
}
static void rombios_load(const struct bios_config *config)
{
uint32_t bioshigh;
struct rombios_info *info;
memcpy((void *)config->bios_address, config->image,
config->image_size);
bioshigh = rombios_highbios_setup();
info = (struct rombios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
info->bios32_entry = bioshigh;
}
/*
* find_mp_table_start - searchs through BIOS memory for '___HVMMP' signature
*
* The '___HVMMP' signature is created by the ROMBIOS and designates a chunk
* of space inside the ROMBIOS that is safe for us to write our MP table info
*/
static void *get_mp_table_start(void)
{
char *bios_mem;
for ( bios_mem = (char *)ROMBIOS_BEGIN;
bios_mem != (char *)ROMBIOS_END;
bios_mem++ )
{
if ( strncmp(bios_mem, "___HVMMP", 8) == 0 )
return bios_mem;
}
return NULL;
}
/* recalculate the new ROMBIOS checksum after adding MP tables */
static void reset_bios_checksum(void)
{
uint32_t i;
uint8_t checksum;
checksum = 0;
for ( i = 0; i < ROMBIOS_MAXOFFSET; i++ )
checksum += ((uint8_t *)(ROMBIOS_BEGIN))[i];
*((uint8_t *)(ROMBIOS_BEGIN + ROMBIOS_MAXOFFSET)) = -checksum;
}
static void rombios_acpi_build_tables(void)
{
struct acpi_config config = {
.dsdt_anycpu = dsdt_anycpu,
.dsdt_anycpu_len = dsdt_anycpu_len,
.dsdt_15cpu = dsdt_15cpu,
.dsdt_15cpu_len = dsdt_15cpu_len,
};
acpi_build_tables(&config, ACPI_PHYSICAL_ADDRESS);
}
static void rombios_create_mp_tables(void)
{
/* Find the 'safe' place in ROMBIOS for the MP tables. */
void *table = get_mp_table_start();
if ( table == NULL )
{
printf("Couldn't find start point for MP tables\n");
return;
}
create_mp_tables(table);
reset_bios_checksum();
}
static void rombios_create_smbios_tables(void)
{
hvm_write_smbios_tables(
SMBIOS_PHYSICAL_ADDRESS,
SMBIOS_PHYSICAL_ADDRESS + sizeof(struct smbios_entry_point),
SMBIOS_PHYSICAL_END);
}
//BUILD_BUG_ON(sizeof(rombios) > (0x00100000U - ROMBIOS_PHYSICAL_ADDRESS));
struct bios_config rombios_config = {
.name = "ROMBIOS",
.image = rombios,
.image_size = sizeof(rombios),
.bios_address = ROMBIOS_PHYSICAL_ADDRESS,
.load_roms = rombios_load_roms,
.bios_load = rombios_load,
.bios_info_setup = rombios_setup_bios_info,
.bios_info_finish = NULL,
.e820_setup = rombios_setup_e820,
.acpi_build_tables = rombios_acpi_build_tables,
.create_mp_tables = rombios_create_mp_tables,
.create_smbios_tables = rombios_create_smbios_tables,
.create_pir_tables = NULL, /* embedded in ROMBIOS */
};
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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