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grub/kern/efi/efi.c

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/* efi.c - generic EFI support */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006 Free Software Foundation, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/misc.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#include <grub/efi/console_control.h>
#include <grub/efi/pe32.h>
#include <grub/machine/time.h>
#include <grub/term.h>
#include <grub/kernel.h>
#include <grub/mm.h>
/* The handle of GRUB itself. Filled in by the startup code. */
grub_efi_handle_t grub_efi_image_handle;
/* The pointer to a system table. Filled in by the startup code. */
grub_efi_system_table_t *grub_efi_system_table;
static grub_efi_guid_t console_control_guid = GRUB_EFI_CONSOLE_CONTROL_GUID;
static grub_efi_guid_t loaded_image_guid = GRUB_EFI_LOADED_IMAGE_GUID;
void *
grub_efi_locate_protocol (grub_efi_guid_t *protocol, void *registration)
{
void *interface;
grub_efi_status_t status;
status = grub_efi_system_table->boot_services->locate_protocol (protocol,
registration,
&interface);
if (status != GRUB_EFI_SUCCESS)
return 0;
return interface;
}
/* Return the array of handles which meet the requirement. If successful,
the number of handles is stored in NUM_HANDLES. The array is allocated
from the heap. */
grub_efi_handle_t *
grub_efi_locate_handle (grub_efi_locate_search_type_t search_type,
grub_efi_guid_t *protocol,
void *search_key,
grub_efi_uintn_t *num_handles)
{
grub_efi_boot_services_t *b;
grub_efi_status_t status;
grub_efi_handle_t *buffer;
grub_efi_uintn_t buffer_size = 8 * sizeof (grub_efi_handle_t);
buffer = grub_malloc (buffer_size);
if (! buffer)
return 0;
b = grub_efi_system_table->boot_services;
status = b->locate_handle (search_type, protocol, search_key,
&buffer_size, buffer);
if (status == GRUB_EFI_BUFFER_TOO_SMALL)
{
grub_free (buffer);
buffer = grub_malloc (buffer_size);
if (! buffer)
return 0;
status = b->locate_handle (search_type, protocol, search_key,
&buffer_size, buffer);
}
if (status != GRUB_EFI_SUCCESS)
{
grub_free (buffer);
return 0;
}
*num_handles = buffer_size / sizeof (grub_efi_handle_t);
return buffer;
}
void *
grub_efi_open_protocol (grub_efi_handle_t handle,
grub_efi_guid_t *protocol,
grub_efi_uint32_t attributes)
{
grub_efi_boot_services_t *b;
grub_efi_status_t status;
void *interface;
b = grub_efi_system_table->boot_services;
status = b->open_protocol (handle,
protocol,
&interface,
grub_efi_image_handle,
0,
attributes);
if (status != GRUB_EFI_SUCCESS)
return 0;
return interface;
}
int
grub_efi_set_text_mode (int on)
{
grub_efi_console_control_protocol_t *c;
grub_efi_screen_mode_t mode, new_mode;
c = grub_efi_locate_protocol (&console_control_guid, 0);
if (! c)
return 0;
if (c->get_mode (c, &mode, 0, 0) != GRUB_EFI_SUCCESS)
return 0;
new_mode = on ? GRUB_EFI_SCREEN_TEXT : GRUB_EFI_SCREEN_GRAPHICS;
if (mode != new_mode)
if (c->set_mode (c, new_mode) != GRUB_EFI_SUCCESS)
return 0;
return 1;
}
void
grub_efi_stall (grub_efi_uintn_t microseconds)
{
grub_efi_system_table->boot_services->stall (microseconds);
}
grub_efi_loaded_image_t *
grub_efi_get_loaded_image (void)
{
return grub_efi_open_protocol (grub_efi_image_handle,
&loaded_image_guid,
GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
}
void
grub_exit (void)
{
grub_efi_fini ();
grub_efi_system_table->boot_services->exit (grub_efi_image_handle,
GRUB_EFI_SUCCESS,
0, 0);
}
grub_uint32_t
grub_get_rtc (void)
{
grub_efi_time_t time;
grub_efi_runtime_services_t *r;
r = grub_efi_system_table->runtime_services;
if (r->get_time (&time, 0) != GRUB_EFI_SUCCESS)
/* What is possible in this case? */
return 0;
return (((time.minute * 60 + time.second) * 1000
+ time.nanosecond / 1000000)
* GRUB_TICKS_PER_SECOND / 1000);
}
/* Search the mods section from the PE32/PE32+ image. This code uses
a PE32 header, but should work with PE32+ as well. */
grub_addr_t
grub_arch_modules_addr (void)
{
grub_efi_loaded_image_t *image;
struct grub_pe32_header *header;
struct grub_pe32_coff_header *coff_header;
struct grub_pe32_section_table *sections;
struct grub_pe32_section_table *section;
struct grub_module_info *info;
grub_uint16_t i;
image = grub_efi_get_loaded_image ();
if (! image)
return 0;
header = image->image_base;
coff_header = &(header->coff_header);
sections
= (struct grub_pe32_section_table *) ((char *) coff_header
+ sizeof (*coff_header)
+ coff_header->optional_header_size);
for (i = 0, section = sections;
i < coff_header->num_sections;
i++, section++)
{
if (grub_strcmp (section->name, "mods") == 0)
break;
}
if (i == coff_header->num_sections)
return 0;
info = (struct grub_module_info *) ((char *) image->image_base
+ section->virtual_address);
if (info->magic != GRUB_MODULE_MAGIC)
return 0;
return (grub_addr_t) info;
}
char *
grub_efi_get_filename (grub_efi_device_path_t *dp)
{
char *name = 0;
while (1)
{
grub_efi_uint8_t type = GRUB_EFI_DEVICE_PATH_TYPE (dp);
grub_efi_uint8_t subtype = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp);
if (type == GRUB_EFI_END_DEVICE_PATH_TYPE)
break;
else if (type == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE
&& subtype == GRUB_EFI_FILE_PATH_DEVICE_PATH_SUBTYPE)
{
grub_efi_file_path_device_path_t *fp;
grub_efi_uint16_t len;
char *p;
grub_size_t size;
if (name)
{
size = grub_strlen (name);
name[size] = '/';
size++;
}
else
size = 0;
len = GRUB_EFI_DEVICE_PATH_LENGTH (dp) - 4;
p = grub_realloc (name, size + len * 4 + 1);
if (! p)
{
grub_free (name);
return 0;
}
name = p;
fp = (grub_efi_file_path_device_path_t *) dp;
*grub_utf16_to_utf8 ((grub_uint8_t *) name + size,
fp->path_name, len) = '\0';
}
dp = GRUB_EFI_NEXT_DEVICE_PATH (dp);
}
if (name)
{
/* EFI breaks paths with backslashes. */
char *p;
for (p = name; *p; p++)
if (*p == '\\')
*p = '/';
}
return name;
}
/* Print the chain of Device Path nodes. This is mainly for debugging. */
void
grub_efi_print_device_path (grub_efi_device_path_t *dp)
{
while (1)
{
grub_efi_uint8_t type = GRUB_EFI_DEVICE_PATH_TYPE (dp);
grub_efi_uint8_t subtype = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp);
grub_efi_uint16_t len = GRUB_EFI_DEVICE_PATH_LENGTH (dp);
switch (type)
{
case GRUB_EFI_END_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE:
/* grub_printf ("/EndEntire\n"); */
grub_putchar ('\n');
break;
case GRUB_EFI_END_THIS_DEVICE_PATH_SUBTYPE:
/* grub_printf ("/EndThis\n"); */
grub_putchar ('\n');
break;
default:
grub_printf ("/EndUnknown(%x)\n", (unsigned) subtype);
break;
}
break;
case GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_PCI_DEVICE_PATH_SUBTYPE:
{
grub_efi_pci_device_path_t pci;
grub_memcpy (&pci, dp, len);
grub_printf ("/PCI(%x,%x)",
(unsigned) pci.function, (unsigned) pci.device);
}
break;
case GRUB_EFI_PCCARD_DEVICE_PATH_SUBTYPE:
{
grub_efi_pccard_device_path_t pccard;
grub_memcpy (&pccard, dp, len);
grub_printf ("/PCCARD(%x)",
(unsigned) pccard.function);
}
break;
case GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE:
{
grub_efi_memory_mapped_device_path_t mmapped;
grub_memcpy (&mmapped, dp, len);
grub_printf ("/MMap(%x,%llx,%llx)",
(unsigned) mmapped.memory_type,
mmapped.start_address,
mmapped.end_address);
}
break;
case GRUB_EFI_VENDOR_DEVICE_PATH_SUBTYPE:
{
grub_efi_vendor_device_path_t vendor;
grub_memcpy (&vendor, dp, sizeof (vendor));
grub_printf ("/Vendor(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)",
(unsigned) vendor.vendor_guid.data1,
(unsigned) vendor.vendor_guid.data2,
(unsigned) vendor.vendor_guid.data3,
(unsigned) vendor.vendor_guid.data4[0],
(unsigned) vendor.vendor_guid.data4[1],
(unsigned) vendor.vendor_guid.data4[2],
(unsigned) vendor.vendor_guid.data4[3],
(unsigned) vendor.vendor_guid.data4[4],
(unsigned) vendor.vendor_guid.data4[5],
(unsigned) vendor.vendor_guid.data4[6],
(unsigned) vendor.vendor_guid.data4[7]);
}
break;
case GRUB_EFI_CONTROLLER_DEVICE_PATH_SUBTYPE:
{
grub_efi_controller_device_path_t controller;
grub_memcpy (&controller, dp, len);
grub_printf ("/Ctrl(%x)",
(unsigned) controller.controller_number);
}
break;
default:
grub_printf ("/UnknownHW(%x)", (unsigned) subtype);
break;
}
break;
case GRUB_EFI_ACPI_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_ACPI_DEVICE_PATH_SUBTYPE:
{
grub_efi_acpi_device_path_t acpi;
grub_memcpy (&acpi, dp, len);
grub_printf ("/ACPI(%x,%x)",
(unsigned) acpi.hid,
(unsigned) acpi.uid);
}
break;
case GRUB_EFI_EXPANDED_ACPI_DEVICE_PATH_SUBTYPE:
{
grub_efi_expanded_acpi_device_path_t eacpi;
grub_memcpy (&eacpi, dp, sizeof (eacpi));
grub_printf ("/ACPI(");
if (GRUB_EFI_EXPANDED_ACPI_HIDSTR (dp)[0] == '\0')
grub_printf ("%x,", (unsigned) eacpi.hid);
else
grub_printf ("%s,", GRUB_EFI_EXPANDED_ACPI_HIDSTR (dp));
if (GRUB_EFI_EXPANDED_ACPI_UIDSTR (dp)[0] == '\0')
grub_printf ("%x,", (unsigned) eacpi.uid);
else
grub_printf ("%s,", GRUB_EFI_EXPANDED_ACPI_UIDSTR (dp));
if (GRUB_EFI_EXPANDED_ACPI_CIDSTR (dp)[0] == '\0')
grub_printf ("%x)", (unsigned) eacpi.cid);
else
grub_printf ("%s)", GRUB_EFI_EXPANDED_ACPI_CIDSTR (dp));
}
break;
default:
grub_printf ("/UnknownACPI(%x)", (unsigned) subtype);
break;
}
break;
case GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_ATAPI_DEVICE_PATH_SUBTYPE:
{
grub_efi_atapi_device_path_t atapi;
grub_memcpy (&atapi, dp, len);
grub_printf ("/ATAPI(%x,%x,%x)",
(unsigned) atapi.primary_secondary,
(unsigned) atapi.slave_master,
(unsigned) atapi.lun);
}
break;
case GRUB_EFI_SCSI_DEVICE_PATH_SUBTYPE:
{
grub_efi_scsi_device_path_t scsi;
grub_memcpy (&scsi, dp, len);
grub_printf ("/SCSI(%x,%x)",
(unsigned) scsi.pun,
(unsigned) scsi.lun);
}
break;
case GRUB_EFI_FIBRE_CHANNEL_DEVICE_PATH_SUBTYPE:
{
grub_efi_fibre_channel_device_path_t fc;
grub_memcpy (&fc, dp, len);
grub_printf ("/FibreChannel(%llx,%llx)",
fc.wwn, fc.lun);
}
break;
case GRUB_EFI_1394_DEVICE_PATH_SUBTYPE:
{
grub_efi_1394_device_path_t firewire;
grub_memcpy (&firewire, dp, len);
grub_printf ("/1394(%llx)", firewire.guid);
}
break;
case GRUB_EFI_USB_DEVICE_PATH_SUBTYPE:
{
grub_efi_usb_device_path_t usb;
grub_memcpy (&usb, dp, len);
grub_printf ("/USB(%x,%x)",
(unsigned) usb.parent_port_number,
(unsigned) usb.interface);
}
break;
case GRUB_EFI_USB_CLASS_DEVICE_PATH_SUBTYPE:
{
grub_efi_usb_class_device_path_t usb_class;
grub_memcpy (&usb_class, dp, len);
grub_printf ("/USBClass(%x,%x,%x,%x,%x)",
(unsigned) usb_class.vendor_id,
(unsigned) usb_class.product_id,
(unsigned) usb_class.device_class,
(unsigned) usb_class.device_subclass,
(unsigned) usb_class.device_protocol);
}
break;
case GRUB_EFI_I2O_DEVICE_PATH_SUBTYPE:
{
grub_efi_i2o_device_path_t i2o;
grub_memcpy (&i2o, dp, len);
grub_printf ("/I2O(%x)", (unsigned) i2o.tid);
}
break;
case GRUB_EFI_MAC_ADDRESS_DEVICE_PATH_SUBTYPE:
{
grub_efi_mac_address_device_path_t mac;
grub_memcpy (&mac, dp, len);
grub_printf ("/MacAddr(%02x:%02x:%02x:%02x:%02x:%02x,%x)",
(unsigned) mac.mac_address[0],
(unsigned) mac.mac_address[1],
(unsigned) mac.mac_address[2],
(unsigned) mac.mac_address[3],
(unsigned) mac.mac_address[4],
(unsigned) mac.mac_address[5],
(unsigned) mac.if_type);
}
break;
case GRUB_EFI_IPV4_DEVICE_PATH_SUBTYPE:
{
grub_efi_ipv4_device_path_t ipv4;
grub_memcpy (&ipv4, dp, len);
grub_printf ("/IPv4(%u.%u.%u.%u,%u.%u.%u.%u,%u,%u,%x,%x)",
(unsigned) ipv4.local_ip_address[0],
(unsigned) ipv4.local_ip_address[1],
(unsigned) ipv4.local_ip_address[2],
(unsigned) ipv4.local_ip_address[3],
(unsigned) ipv4.remote_ip_address[0],
(unsigned) ipv4.remote_ip_address[1],
(unsigned) ipv4.remote_ip_address[2],
(unsigned) ipv4.remote_ip_address[3],
(unsigned) ipv4.local_port,
(unsigned) ipv4.remote_port,
(unsigned) ipv4.protocol,
(unsigned) ipv4.static_ip_address);
}
break;
case GRUB_EFI_IPV6_DEVICE_PATH_SUBTYPE:
{
grub_efi_ipv6_device_path_t ipv6;
grub_memcpy (&ipv6, dp, len);
grub_printf ("/IPv6(%x:%x:%x:%x:%x:%x:%x:%x,%x:%x:%x:%x:%x:%x:%x:%x,%u,%u,%x,%x)",
(unsigned) ipv6.local_ip_address[0],
(unsigned) ipv6.local_ip_address[1],
(unsigned) ipv6.local_ip_address[2],
(unsigned) ipv6.local_ip_address[3],
(unsigned) ipv6.local_ip_address[4],
(unsigned) ipv6.local_ip_address[5],
(unsigned) ipv6.local_ip_address[6],
(unsigned) ipv6.local_ip_address[7],
(unsigned) ipv6.remote_ip_address[0],
(unsigned) ipv6.remote_ip_address[1],
(unsigned) ipv6.remote_ip_address[2],
(unsigned) ipv6.remote_ip_address[3],
(unsigned) ipv6.remote_ip_address[4],
(unsigned) ipv6.remote_ip_address[5],
(unsigned) ipv6.remote_ip_address[6],
(unsigned) ipv6.remote_ip_address[7],
(unsigned) ipv6.local_port,
(unsigned) ipv6.remote_port,
(unsigned) ipv6.protocol,
(unsigned) ipv6.static_ip_address);
}
break;
case GRUB_EFI_INFINIBAND_DEVICE_PATH_SUBTYPE:
{
grub_efi_infiniband_device_path_t ib;
grub_memcpy (&ib, dp, len);
grub_printf ("/InfiniBand(%x,%llx,%llx,%llx)",
(unsigned) ib.port_gid[0], /* XXX */
ib.remote_id,
ib.target_port_id,
ib.device_id);
}
break;
case GRUB_EFI_UART_DEVICE_PATH_SUBTYPE:
{
grub_efi_uart_device_path_t uart;
grub_memcpy (&uart, dp, len);
grub_printf ("/UART(%llu,%u,%x,%x)",
uart.baud_rate,
uart.data_bits,
uart.parity,
uart.stop_bits);
}
break;
case GRUB_EFI_VENDOR_MESSAGING_DEVICE_PATH_SUBTYPE:
{
grub_efi_vendor_messaging_device_path_t vendor;
grub_memcpy (&vendor, dp, sizeof (vendor));
grub_printf ("/Vendor(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)",
(unsigned) vendor.vendor_guid.data1,
(unsigned) vendor.vendor_guid.data2,
(unsigned) vendor.vendor_guid.data3,
(unsigned) vendor.vendor_guid.data4[0],
(unsigned) vendor.vendor_guid.data4[1],
(unsigned) vendor.vendor_guid.data4[2],
(unsigned) vendor.vendor_guid.data4[3],
(unsigned) vendor.vendor_guid.data4[4],
(unsigned) vendor.vendor_guid.data4[5],
(unsigned) vendor.vendor_guid.data4[6],
(unsigned) vendor.vendor_guid.data4[7]);
}
break;
default:
grub_printf ("/UnknownMessaging(%x)", (unsigned) subtype);
break;
}
break;
case GRUB_EFI_MEDIA_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_HARD_DRIVE_DEVICE_PATH_SUBTYPE:
{
grub_efi_hard_drive_device_path_t hd;
grub_memcpy (&hd, dp, len);
grub_printf ("/HD(%u,%llx,%llx,%02x%02x%02x%02x%02x%02x%02x%02x,%x,%x)",
hd.partition_number,
hd.partition_start,
hd.partition_size,
(unsigned) hd.partition_signature[0],
(unsigned) hd.partition_signature[1],
(unsigned) hd.partition_signature[2],
(unsigned) hd.partition_signature[3],
(unsigned) hd.partition_signature[4],
(unsigned) hd.partition_signature[5],
(unsigned) hd.partition_signature[6],
(unsigned) hd.partition_signature[7],
(unsigned) hd.mbr_type,
(unsigned) hd.signature_type);
}
break;
case GRUB_EFI_CDROM_DEVICE_PATH_SUBTYPE:
{
grub_efi_cdrom_device_path_t cd;
grub_memcpy (&cd, dp, len);
grub_printf ("/CD(%u,%llx,%llx)",
cd.boot_entry,
cd.partition_start,
cd.partition_size);
}
break;
case GRUB_EFI_VENDOR_MEDIA_DEVICE_PATH_SUBTYPE:
{
grub_efi_vendor_media_device_path_t vendor;
grub_memcpy (&vendor, dp, sizeof (vendor));
grub_printf ("/Vendor(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)",
(unsigned) vendor.vendor_guid.data1,
(unsigned) vendor.vendor_guid.data2,
(unsigned) vendor.vendor_guid.data3,
(unsigned) vendor.vendor_guid.data4[0],
(unsigned) vendor.vendor_guid.data4[1],
(unsigned) vendor.vendor_guid.data4[2],
(unsigned) vendor.vendor_guid.data4[3],
(unsigned) vendor.vendor_guid.data4[4],
(unsigned) vendor.vendor_guid.data4[5],
(unsigned) vendor.vendor_guid.data4[6],
(unsigned) vendor.vendor_guid.data4[7]);
}
break;
case GRUB_EFI_FILE_PATH_DEVICE_PATH_SUBTYPE:
{
grub_efi_file_path_device_path_t *fp;
grub_uint8_t buf[(len - 4) * 4 + 1];
fp = (grub_efi_file_path_device_path_t *) dp;
*grub_utf16_to_utf8 (buf, fp->path_name, len - 4) = '\0';
grub_printf ("/File(%s)", buf);
}
break;
case GRUB_EFI_PROTOCOL_DEVICE_PATH_SUBTYPE:
{
grub_efi_protocol_device_path_t proto;
grub_memcpy (&proto, dp, sizeof (proto));
grub_printf ("/Protocol(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)",
(unsigned) proto.guid.data1,
(unsigned) proto.guid.data2,
(unsigned) proto.guid.data3,
(unsigned) proto.guid.data4[0],
(unsigned) proto.guid.data4[1],
(unsigned) proto.guid.data4[2],
(unsigned) proto.guid.data4[3],
(unsigned) proto.guid.data4[4],
(unsigned) proto.guid.data4[5],
(unsigned) proto.guid.data4[6],
(unsigned) proto.guid.data4[7]);
}
break;
default:
grub_printf ("/UnknownMedia(%x)", (unsigned) subtype);
break;
}
break;
case GRUB_EFI_BIOS_DEVICE_PATH_TYPE:
switch (subtype)
{
case GRUB_EFI_BIOS_DEVICE_PATH_SUBTYPE:
{
grub_efi_bios_device_path_t bios;
grub_memcpy (&bios, dp, sizeof (bios));
grub_printf ("/BIOS(%x,%x,%s)",
(unsigned) bios.device_type,
(unsigned) bios.status_flags,
(char *) (dp + 1));
}
break;
default:
grub_printf ("/UnknownBIOS(%x)", (unsigned) subtype);
break;
}
break;
default:
grub_printf ("/UnknownType(%x,%x)\n",
(unsigned) type,
(unsigned) subtype);
return;
break;
}
if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp))
break;
dp = (grub_efi_device_path_t *) ((char *) dp + len);
}
}
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