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https://github.com/xen-project/xen.git
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Wei Liu
e4506f404c
Do not embed IPXE into Rombios anymore. Instead, it is loaded by the toolstack from a file as a separate module. Ability to let user specify an IPXE blob will come later. No user visible change. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Jan Beulich <jbeulich@suse.com>
250 lines
6.9 KiB
C
250 lines
6.9 KiB
C
/*
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* HVM ROMBIOS support.
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*
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* Leendert van Doorn, leendert@watson.ibm.com
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* Copyright (c) 2005, International Business Machines Corporation.
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* Copyright (c) 2006, Keir Fraser, XenSource Inc.
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* Copyright (c) 2011, Citrix Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "../rombios/config.h"
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#include "smbios_types.h"
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#include "pci_regs.h"
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#include "util.h"
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#include "hypercall.h"
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#include "option_rom.h"
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#include <libacpi.h>
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#include <xen/hvm/params.h>
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#define ROM_INCLUDE_ROMBIOS
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#define ROM_INCLUDE_VGABIOS
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#define ROM_INCLUDE_ETHERBOOT
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#include "roms.inc"
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#define ROMBIOS_BEGIN 0x000F0000
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#define ROMBIOS_SIZE 0x00010000
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#define ROMBIOS_MAXOFFSET 0x0000FFFF
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#define ROMBIOS_END (ROMBIOS_BEGIN + ROMBIOS_SIZE)
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static void rombios_setup_e820(void)
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{
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/*
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* 0x9E000-0x09F000: Stack.
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* 0x9FC00-0x0A0000: Extended BIOS Data Area (EBDA).
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* ...
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* 0xE0000-0x0F0000: PC-specific area. We place various tables here.
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* 0xF0000-0x100000: System BIOS.
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*/
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*E820_NR = build_e820_table(E820, 0x9E000, 0xE0000);
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dump_e820_table(E820, *E820_NR);
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}
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static void rombios_setup_bios_info(void)
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{
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struct rombios_info *info;
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info = (struct rombios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
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memset(info, 0, sizeof(*info));
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}
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static void *ipxe_module_addr;
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static void rombios_load_roms(void)
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{
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int option_rom_sz = 0, vgabios_sz = 0, etherboot_sz = 0;
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uint32_t etherboot_phys_addr = 0, option_rom_phys_addr = 0;
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switch ( virtual_vga )
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{
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case VGA_cirrus:
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printf("Loading Cirrus VGABIOS ...\n");
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memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
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vgabios_cirrusvga, sizeof(vgabios_cirrusvga));
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vgabios_sz = round_option_rom(sizeof(vgabios_cirrusvga));
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break;
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case VGA_std:
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printf("Loading Standard VGABIOS ...\n");
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memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
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vgabios_stdvga, sizeof(vgabios_stdvga));
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vgabios_sz = round_option_rom(sizeof(vgabios_stdvga));
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break;
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case VGA_pt:
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printf("Loading VGABIOS of passthroughed gfx ...\n");
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vgabios_sz = round_option_rom(
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(*(uint8_t *)(VGABIOS_PHYSICAL_ADDRESS+2)) * 512);
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break;
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default:
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printf("No emulated VGA adaptor ...\n");
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break;
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}
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etherboot_phys_addr = VGABIOS_PHYSICAL_ADDRESS + vgabios_sz;
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if ( etherboot_phys_addr < OPTIONROM_PHYSICAL_ADDRESS )
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etherboot_phys_addr = OPTIONROM_PHYSICAL_ADDRESS;
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if ( ipxe_module_addr )
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{
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etherboot_sz = scan_etherboot_nic(OPTIONROM_PHYSICAL_END,
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etherboot_phys_addr,
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ipxe_module_addr);
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option_rom_phys_addr = etherboot_phys_addr + etherboot_sz;
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option_rom_sz = pci_load_option_roms(OPTIONROM_PHYSICAL_END,
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option_rom_phys_addr);
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}
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printf("Option ROMs:\n");
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if ( vgabios_sz )
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printf(" %05x-%05x: VGA BIOS\n",
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VGABIOS_PHYSICAL_ADDRESS,
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VGABIOS_PHYSICAL_ADDRESS + vgabios_sz - 1);
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if ( etherboot_sz )
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printf(" %05x-%05x: Etherboot ROM\n",
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etherboot_phys_addr,
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etherboot_phys_addr + etherboot_sz - 1);
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if ( option_rom_sz )
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printf(" %05x-%05x: PCI Option ROMs\n",
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option_rom_phys_addr,
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option_rom_phys_addr + option_rom_sz - 1);
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}
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static void rombios_load(const struct bios_config *config,
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void *unused_addr, uint32_t unused_size,
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void *ipxe_addr)
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{
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uint32_t bioshigh;
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struct rombios_info *info;
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BUILD_BUG_ON(sizeof(rombios) > 0x100000 - ROMBIOS_PHYSICAL_ADDRESS);
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memcpy((void *)config->bios_address, config->image,
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config->image_size);
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bioshigh = rombios_highbios_setup();
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info = (struct rombios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
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info->bios32_entry = bioshigh;
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/* Stash ipxe address */
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ipxe_module_addr = ipxe_addr;
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}
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/*
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* find_mp_table_start - searchs through BIOS memory for '___HVMMP' signature
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*
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* The '___HVMMP' signature is created by the ROMBIOS and designates a chunk
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* of space inside the ROMBIOS that is safe for us to write our MP table info
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*/
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static void *get_mp_table_start(void)
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{
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char *bios_mem;
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for ( bios_mem = (char *)ROMBIOS_BEGIN;
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bios_mem != (char *)ROMBIOS_END;
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bios_mem++ )
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{
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if ( strncmp(bios_mem, "___HVMMP", 8) == 0 )
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return bios_mem;
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}
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return NULL;
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}
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/* recalculate the new ROMBIOS checksum after adding MP tables */
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static void reset_bios_checksum(void)
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{
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uint32_t i;
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uint8_t checksum;
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checksum = 0;
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for ( i = 0; i < ROMBIOS_MAXOFFSET; i++ )
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checksum += ((uint8_t *)(ROMBIOS_BEGIN))[i];
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*((uint8_t *)(ROMBIOS_BEGIN + ROMBIOS_MAXOFFSET)) = -checksum;
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}
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static void rombios_acpi_build_tables(void)
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{
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struct acpi_config config = {
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.dsdt_anycpu = dsdt_anycpu,
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.dsdt_anycpu_len = dsdt_anycpu_len,
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.dsdt_15cpu = dsdt_15cpu,
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.dsdt_15cpu_len = dsdt_15cpu_len,
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};
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hvmloader_acpi_build_tables(&config, ACPI_PHYSICAL_ADDRESS);
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}
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static void rombios_create_mp_tables(void)
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{
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/* Find the 'safe' place in ROMBIOS for the MP tables. */
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void *table = get_mp_table_start();
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if ( table == NULL )
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{
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printf("Couldn't find start point for MP tables\n");
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return;
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}
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create_mp_tables(table);
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reset_bios_checksum();
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}
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static void rombios_create_smbios_tables(void)
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{
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hvm_write_smbios_tables(
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SMBIOS_PHYSICAL_ADDRESS,
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SMBIOS_PHYSICAL_ADDRESS + sizeof(struct smbios_entry_point),
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SMBIOS_PHYSICAL_END);
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}
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struct bios_config rombios_config = {
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.name = "ROMBIOS",
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.image = rombios,
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.image_size = sizeof(rombios),
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.bios_address = ROMBIOS_PHYSICAL_ADDRESS,
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.load_roms = rombios_load_roms,
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.bios_load = rombios_load,
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.bios_info_setup = rombios_setup_bios_info,
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.bios_info_finish = NULL,
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.e820_setup = rombios_setup_e820,
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.acpi_build_tables = rombios_acpi_build_tables,
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.create_mp_tables = rombios_create_mp_tables,
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.create_smbios_tables = rombios_create_smbios_tables,
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.create_pir_tables = NULL, /* embedded in ROMBIOS */
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};
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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