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/*
* HVM OVMF UEFI support.
*
* Bei Guan, gbtju85@gmail.com
* Andrei Warkentin, andreiw@motorola.com
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "smbios_types.h"
#include "libacpi.h"
#include "apic_regs.h"
#include "../rombios/config.h"
#include "util.h"
#include "pci_regs.h"
#include "hypercall.h"
#include <xen/hvm/params.h>
#include <xen/hvm/ioreq.h>
#include <xen/memory.h>
#define OVMF_MAXOFFSET 0x000FFFFFULL
#define OVMF_END 0x100000000ULL
#define LOWCHUNK_BEGIN 0x000F0000
#define LOWCHUNK_SIZE 0x00010000
#define LOWCHUNK_MAXOFFSET 0x0000FFFF
#define OVMF_INFO_PHYSICAL_ADDRESS 0x00001000
#define OVMF_INFO_MAX_TABLES 4
struct ovmf_info {
char signature[14]; /* XenHVMOVMF\0\0\0\0 */
uint8_t length; /* Length of this struct */
uint8_t checksum; /* Set such that the sum over bytes 0..length == 0 */
/*
* Physical address of an array of tables_nr elements.
*
* Each element is a 64 bit value containing the physical address
* of a BIOS table.
*/
uint64_t tables;
uint32_t tables_nr;
/*
* Physical address of the e820 table, contains e820_nr entries.
*/
uint64_t e820;
uint32_t e820_nr;
} __attribute__ ((packed));
static void ovmf_setup_bios_info(void)
{
struct ovmf_info *info = (void *)OVMF_INFO_PHYSICAL_ADDRESS;
*info = (struct ovmf_info) {
.signature = "XenHVMOVMF",
.length = sizeof(*info)
};
}
static void ovmf_finish_bios_info(void)
{
struct ovmf_info *info = (void *)OVMF_INFO_PHYSICAL_ADDRESS;
uint32_t i;
uint8_t checksum;
checksum = 0;
for ( i = 0; i < info->length; i++ )
checksum += ((uint8_t *)(info))[i];
info->checksum = -checksum;
}
static void ovmf_load(const struct bios_config *config,
void *bios_addr, uint32_t bios_length,
void *unused_addr)
{
xen_pfn_t mfn;
uint64_t addr = OVMF_END
- ((bios_length + OVMF_MAXOFFSET) & ~OVMF_MAXOFFSET);
uint64_t ovmf_end = addr + bios_length;
ovmf_config.bios_address = addr;
ovmf_config.image_size = bios_length;
/* Copy low-reset vector portion. */
memcpy((void *)LOWCHUNK_BEGIN,
(uint8_t *)bios_addr + bios_length - LOWCHUNK_SIZE,
LOWCHUNK_SIZE);
/* Ensure we have backing page prior to moving FD. */
while ( (addr >> PAGE_SHIFT) != (ovmf_end >> PAGE_SHIFT) )
{
mfn = (uint32_t) (addr >> PAGE_SHIFT);
addr += PAGE_SIZE;
mem_hole_populate_ram(mfn, 1);
}
/* Check that source and destination does not overlaps. */
BUG_ON(addr + bios_length > (unsigned)bios_addr &&
addr < (unsigned)bios_addr + bios_length);
/* Copy FD. */
memcpy((void *)ovmf_config.bios_address, bios_addr, bios_length);
}
static void ovmf_acpi_build_tables(void)
{
struct acpi_config config = {
.dsdt_anycpu = dsdt_anycpu_qemu_xen,
.dsdt_anycpu_len = dsdt_anycpu_qemu_xen_len,
.dsdt_15cpu = NULL,
.dsdt_15cpu_len = 0
};
hvmloader_acpi_build_tables(&config, ACPI_PHYSICAL_ADDRESS);
}
static void ovmf_create_smbios_tables(void)
{
hvm_write_smbios_tables(
SMBIOS_PHYSICAL_ADDRESS,
SMBIOS_PHYSICAL_ADDRESS + sizeof(struct smbios_entry_point),
SMBIOS_PHYSICAL_END);
}
static void ovmf_setup_e820(void)
{
struct ovmf_info *info = (void *)OVMF_INFO_PHYSICAL_ADDRESS;
struct e820entry *e820 = scratch_alloc(sizeof(struct e820entry)*16, 0);
info->e820 = (uint32_t)e820;
/* Reserve LOWCHUNK_BEGIN to 0x100000 as well, that's reset vector. */
info->e820_nr = build_e820_table(e820, 0, LOWCHUNK_BEGIN);
dump_e820_table(e820, info->e820_nr);
}
struct bios_config ovmf_config = {
.name = "OVMF",
.bios_load = ovmf_load,
.load_roms = 0,
.bios_info_setup = ovmf_setup_bios_info,
.bios_info_finish = ovmf_finish_bios_info,
.e820_setup = ovmf_setup_e820,
.acpi_build_tables = ovmf_acpi_build_tables,
.create_mp_tables = NULL,
.create_smbios_tables = ovmf_create_smbios_tables,
.create_pir_tables = NULL,
};
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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