diff options
Diffstat (limited to 'grub-core/kern/efi')
| -rw-r--r-- | grub-core/kern/efi/efi.c | 742 | ||||
| -rw-r--r-- | grub-core/kern/efi/init.c | 130 | ||||
| -rw-r--r-- | grub-core/kern/efi/mm.c | 453 |
3 files changed, 1325 insertions, 0 deletions
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c new file mode 100644 index 0000000..fa1d0c7 --- /dev/null +++ b/grub-core/kern/efi/efi.c @@ -0,0 +1,742 @@ +/* efi.c - generic EFI support */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2008,2009,2010 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/misc.h> +#include <grub/charset.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; +static grub_efi_guid_t device_path_guid = GRUB_EFI_DEVICE_PATH_GUID; + +void * +grub_efi_locate_protocol (grub_efi_guid_t *protocol, void *registration) +{ + void *interface; + grub_efi_status_t status; + + status = efi_call_3 (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 = efi_call_5 (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 = efi_call_5 (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 = efi_call_6 (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) + /* No console control protocol instance available, assume it is + already in text mode. */ + return 1; + + if (efi_call_4 (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 (efi_call_2 (c->set_mode, c, new_mode) != GRUB_EFI_SUCCESS) + return 0; + + return 1; +} + +void +grub_efi_stall (grub_efi_uintn_t microseconds) +{ + efi_call_1 (grub_efi_system_table->boot_services->stall, microseconds); +} + +grub_efi_loaded_image_t * +grub_efi_get_loaded_image (grub_efi_handle_t image_handle) +{ + return grub_efi_open_protocol (image_handle, + &loaded_image_guid, + GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL); +} + +void +grub_exit (void) +{ + grub_efi_fini (); + efi_call_4 (grub_efi_system_table->boot_services->exit, + grub_efi_image_handle, GRUB_EFI_SUCCESS, 0, 0); + for (;;) ; +} + +/* On i386, a firmware-independant grub_reboot() is provided by realmode.S. */ +#ifndef __i386__ +void +grub_reboot (void) +{ + grub_efi_fini (); + efi_call_4 (grub_efi_system_table->runtime_services->reset_system, + GRUB_EFI_RESET_COLD, GRUB_EFI_SUCCESS, 0, NULL); + for (;;) ; +} +#endif + +grub_err_t +grub_efi_set_virtual_address_map (grub_efi_uintn_t memory_map_size, + grub_efi_uintn_t descriptor_size, + grub_efi_uint32_t descriptor_version, + grub_efi_memory_descriptor_t *virtual_map) +{ + grub_efi_runtime_services_t *r; + grub_efi_status_t status; + + r = grub_efi_system_table->runtime_services; + status = efi_call_4 (r->set_virtual_address_map, memory_map_size, + descriptor_size, descriptor_version, virtual_map); + + if (status == GRUB_EFI_SUCCESS) + return GRUB_ERR_NONE; + + return grub_error (GRUB_ERR_IO, "set_virtual_address_map failed"); +} + +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 (efi_call_2 (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 (grub_efi_image_handle); + 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) + / sizeof (grub_efi_char16_t)); + 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; +} + +grub_efi_device_path_t * +grub_efi_get_device_path (grub_efi_handle_t handle) +{ + return grub_efi_open_protocol (handle, &device_path_guid, + GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL); +} + +/* 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, + (unsigned long long) mmapped.start_address, + (unsigned long long) 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)", + (unsigned long long) fc.wwn, + (unsigned long long) 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)", (unsigned long long) 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 */ + (unsigned long long) ib.remote_id, + (unsigned long long) ib.target_port_id, + (unsigned long long) 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)", + (unsigned long long) 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, + (unsigned long long) hd.partition_start, + (unsigned long long) 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, + (unsigned long long) cd.partition_start, + (unsigned long long) 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) * 2 + 1]; + fp = (grub_efi_file_path_device_path_t *) dp; + *grub_utf16_to_utf8 (buf, fp->path_name, + (len - 4) / sizeof (grub_efi_char16_t)) + = '\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); + } +} diff --git a/grub-core/kern/efi/init.c b/grub-core/kern/efi/init.c new file mode 100644 index 0000000..1b0a872 --- /dev/null +++ b/grub-core/kern/efi/init.c @@ -0,0 +1,130 @@ +/* init.c - generic EFI initialization and finalization */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/efi/efi.h> +#include <grub/efi/console.h> +#include <grub/efi/disk.h> +#include <grub/term.h> +#include <grub/misc.h> +#include <grub/env.h> +#include <grub/mm.h> +#include <grub/kernel.h> + +void +grub_efi_init (void) +{ + /* First of all, initialize the console so that GRUB can display + messages. */ + grub_console_init (); + + /* Initialize the memory management system. */ + grub_efi_mm_init (); + + efi_call_4 (grub_efi_system_table->boot_services->set_watchdog_timer, + 0, 0, 0, NULL); + + grub_efidisk_init (); +} + +void +grub_efi_set_prefix (void) +{ + grub_efi_loaded_image_t *image = NULL; + char *device = NULL; + char *path = NULL; + + { + char *pptr = NULL; + if (grub_prefix[0] == '(') + { + pptr = grub_strrchr (grub_prefix, ')'); + if (pptr) + { + device = grub_strndup (grub_prefix + 1, pptr - grub_prefix - 1); + pptr++; + } + } + if (!pptr) + pptr = grub_prefix; + if (pptr[0]) + path = grub_strdup (pptr); + } + + if ((!device || device[0] == ',' || !device[0]) || !path) + image = grub_efi_get_loaded_image (grub_efi_image_handle); + if (image) + { + if (!device) + device = grub_efidisk_get_device_name (image->device_handle); + else if (device[0] == ',' || !device[0]) + { + /* We have a partition, but still need to fill in the drive. */ + char *image_device, *comma, *new_device; + + image_device = grub_efidisk_get_device_name (image->device_handle); + comma = grub_strchr (image_device, ','); + if (comma) + { + char *drive = grub_strndup (image_device, comma - image_device); + new_device = grub_xasprintf ("%s%s", drive, device); + grub_free (drive); + } + else + new_device = grub_xasprintf ("%s%s", image_device, device); + + grub_free (image_device); + grub_free (device); + device = new_device; + } + } + + if (image && !path) + { + char *p; + + path = grub_efi_get_filename (image->file_path); + + /* Get the directory. */ + p = grub_strrchr (path, '/'); + if (p) + *p = '\0'; + } + + if (device && path) + { + char *prefix; + + prefix = grub_xasprintf ("(%s)%s", device, path); + if (prefix) + { + grub_env_set ("prefix", prefix); + grub_free (prefix); + } + } + + grub_free (device); + grub_free (path); +} + +void +grub_efi_fini (void) +{ + grub_efidisk_fini (); + grub_console_fini (); +} diff --git a/grub-core/kern/efi/mm.c b/grub-core/kern/efi/mm.c new file mode 100644 index 0000000..8b9e6ec --- /dev/null +++ b/grub-core/kern/efi/mm.c @@ -0,0 +1,453 @@ +/* mm.c - generic EFI memory management */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/misc.h> +#include <grub/mm.h> +#include <grub/efi/api.h> +#include <grub/efi/efi.h> + +#define NEXT_MEMORY_DESCRIPTOR(desc, size) \ + ((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size))) + +#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12) +#define PAGES_TO_BYTES(pages) ((pages) << 12) + +/* The size of a memory map obtained from the firmware. This must be + a multiplier of 4KB. */ +#define MEMORY_MAP_SIZE 0x3000 + +/* The minimum and maximum heap size for GRUB itself. */ +#define MIN_HEAP_SIZE 0x100000 +#define MAX_HEAP_SIZE (1600 * 0x100000) + +static void *finish_mmap_buf = 0; +static grub_efi_uintn_t finish_mmap_size = 0; +static grub_efi_uintn_t finish_key = 0; +static grub_efi_uintn_t finish_desc_size; +static grub_efi_uint32_t finish_desc_version; +int grub_efi_is_finished = 0; + +/* Allocate pages. Return the pointer to the first of allocated pages. */ +void * +grub_efi_allocate_pages (grub_efi_physical_address_t address, + grub_efi_uintn_t pages) +{ + grub_efi_allocate_type_t type; + grub_efi_status_t status; + grub_efi_boot_services_t *b; + +#if 1 + /* Limit the memory access to less than 4GB for 32-bit platforms. */ + if (address > 0xffffffff) + return 0; +#endif + +#if 1 + if (address == 0) + { + type = GRUB_EFI_ALLOCATE_MAX_ADDRESS; + address = 0xffffffff; + } + else + type = GRUB_EFI_ALLOCATE_ADDRESS; +#else + if (address == 0) + type = GRUB_EFI_ALLOCATE_ANY_PAGES; + else + type = GRUB_EFI_ALLOCATE_ADDRESS; +#endif + + b = grub_efi_system_table->boot_services; + status = efi_call_4 (b->allocate_pages, type, GRUB_EFI_LOADER_DATA, pages, &address); + if (status != GRUB_EFI_SUCCESS) + return 0; + + if (address == 0) + { + /* Uggh, the address 0 was allocated... This is too annoying, + so reallocate another one. */ + address = 0xffffffff; + status = efi_call_4 (b->allocate_pages, type, GRUB_EFI_LOADER_DATA, pages, &address); + grub_efi_free_pages (0, pages); + if (status != GRUB_EFI_SUCCESS) + return 0; + } + + return (void *) ((grub_addr_t) address); +} + +/* Free pages starting from ADDRESS. */ +void +grub_efi_free_pages (grub_efi_physical_address_t address, + grub_efi_uintn_t pages) +{ + grub_efi_boot_services_t *b; + + b = grub_efi_system_table->boot_services; + efi_call_2 (b->free_pages, address, pages); +} + +grub_err_t +grub_efi_finish_boot_services (grub_efi_uintn_t *outbuf_size, void *outbuf, + grub_efi_uintn_t *map_key, + grub_efi_uintn_t *efi_desc_size, + grub_efi_uint32_t *efi_desc_version) +{ + grub_efi_boot_services_t *b; + grub_efi_status_t status; + + if (grub_efi_get_memory_map (&finish_mmap_size, finish_mmap_buf, &finish_key, + &finish_desc_size, &finish_desc_version) < 0) + return grub_error (GRUB_ERR_IO, "couldn't retrieve memory map"); + + if (outbuf && *outbuf_size < finish_mmap_size) + return grub_error (GRUB_ERR_IO, "memory map buffer is too small"); + + finish_mmap_buf = grub_malloc (finish_mmap_size); + if (!finish_mmap_buf) + return grub_errno; + + if (grub_efi_get_memory_map (&finish_mmap_size, finish_mmap_buf, &finish_key, + &finish_desc_size, &finish_desc_version) <= 0) + return grub_error (GRUB_ERR_IO, "couldn't retrieve memory map"); + + b = grub_efi_system_table->boot_services; + status = efi_call_2 (b->exit_boot_services, grub_efi_image_handle, + finish_key); + if (status != GRUB_EFI_SUCCESS) + return grub_error (GRUB_ERR_IO, "couldn't terminate EFI services"); + + grub_efi_is_finished = 1; + if (outbuf_size) + *outbuf_size = finish_mmap_size; + if (outbuf) + grub_memcpy (outbuf, finish_mmap_buf, finish_mmap_size); + if (map_key) + *map_key = finish_key; + if (efi_desc_size) + *efi_desc_size = finish_desc_size; + if (efi_desc_version) + *efi_desc_version = finish_desc_version; + + return GRUB_ERR_NONE; +} + +/* Get the memory map as defined in the EFI spec. Return 1 if successful, + return 0 if partial, or return -1 if an error occurs. */ +int +grub_efi_get_memory_map (grub_efi_uintn_t *memory_map_size, + grub_efi_memory_descriptor_t *memory_map, + grub_efi_uintn_t *map_key, + grub_efi_uintn_t *descriptor_size, + grub_efi_uint32_t *descriptor_version) +{ + grub_efi_status_t status; + grub_efi_boot_services_t *b; + grub_efi_uintn_t key; + grub_efi_uint32_t version; + + if (grub_efi_is_finished) + { + int ret = 1; + if (*memory_map_size < finish_mmap_size) + { + grub_memcpy (memory_map, finish_mmap_buf, *memory_map_size); + ret = 0; + } + else + { + grub_memcpy (memory_map, finish_mmap_buf, finish_mmap_size); + ret = 1; + } + *memory_map_size = finish_mmap_size; + if (map_key) + *map_key = finish_key; + if (descriptor_size) + *descriptor_size = finish_desc_size; + if (descriptor_version) + *descriptor_version = finish_desc_version; + return ret; + } + + /* Allow some parameters to be missing. */ + if (! map_key) + map_key = &key; + if (! descriptor_version) + descriptor_version = &version; + + b = grub_efi_system_table->boot_services; + status = efi_call_5 (b->get_memory_map, memory_map_size, memory_map, map_key, + descriptor_size, descriptor_version); + if (status == GRUB_EFI_SUCCESS) + return 1; + else if (status == GRUB_EFI_BUFFER_TOO_SMALL) + return 0; + else + return -1; +} + +/* Sort the memory map in place. */ +static void +sort_memory_map (grub_efi_memory_descriptor_t *memory_map, + grub_efi_uintn_t desc_size, + grub_efi_memory_descriptor_t *memory_map_end) +{ + grub_efi_memory_descriptor_t *d1; + grub_efi_memory_descriptor_t *d2; + + for (d1 = memory_map; + d1 < memory_map_end; + d1 = NEXT_MEMORY_DESCRIPTOR (d1, desc_size)) + { + grub_efi_memory_descriptor_t *max_desc = d1; + + for (d2 = NEXT_MEMORY_DESCRIPTOR (d1, desc_size); + d2 < memory_map_end; + d2 = NEXT_MEMORY_DESCRIPTOR (d2, desc_size)) + { + if (max_desc->num_pages < d2->num_pages) + max_desc = d2; + } + + if (max_desc != d1) + { + grub_efi_memory_descriptor_t tmp; + + tmp = *d1; + *d1 = *max_desc; + *max_desc = tmp; + } + } +} + +/* Filter the descriptors. GRUB needs only available memory. */ +static grub_efi_memory_descriptor_t * +filter_memory_map (grub_efi_memory_descriptor_t *memory_map, + grub_efi_memory_descriptor_t *filtered_memory_map, + grub_efi_uintn_t desc_size, + grub_efi_memory_descriptor_t *memory_map_end) +{ + grub_efi_memory_descriptor_t *desc; + grub_efi_memory_descriptor_t *filtered_desc; + + for (desc = memory_map, filtered_desc = filtered_memory_map; + desc < memory_map_end; + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size)) + { + if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY +#if 1 + && desc->physical_start <= 0xffffffff +#endif + && desc->physical_start + PAGES_TO_BYTES (desc->num_pages) > 0x100000 + && desc->num_pages != 0) + { + grub_memcpy (filtered_desc, desc, desc_size); + + /* Avoid less than 1MB, because some loaders seem to be confused. */ + if (desc->physical_start < 0x100000) + { + desc->num_pages -= BYTES_TO_PAGES (0x100000 + - desc->physical_start); + desc->physical_start = 0x100000; + } + +#if 1 + if (BYTES_TO_PAGES (filtered_desc->physical_start) + + filtered_desc->num_pages + > BYTES_TO_PAGES (0x100000000LL)) + filtered_desc->num_pages + = (BYTES_TO_PAGES (0x100000000LL) + - BYTES_TO_PAGES (filtered_desc->physical_start)); +#endif + + if (filtered_desc->num_pages == 0) + continue; + + filtered_desc = NEXT_MEMORY_DESCRIPTOR (filtered_desc, desc_size); + } + } + + return filtered_desc; +} + +/* Return the total number of pages. */ +static grub_efi_uint64_t +get_total_pages (grub_efi_memory_descriptor_t *memory_map, + grub_efi_uintn_t desc_size, + grub_efi_memory_descriptor_t *memory_map_end) +{ + grub_efi_memory_descriptor_t *desc; + grub_efi_uint64_t total = 0; + + for (desc = memory_map; + desc < memory_map_end; + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size)) + total += desc->num_pages; + + return total; +} + +/* Add memory regions. */ +static void +add_memory_regions (grub_efi_memory_descriptor_t *memory_map, + grub_efi_uintn_t desc_size, + grub_efi_memory_descriptor_t *memory_map_end, + grub_efi_uint64_t required_pages) +{ + grub_efi_memory_descriptor_t *desc; + + for (desc = memory_map; + desc < memory_map_end; + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size)) + { + grub_efi_uint64_t pages; + grub_efi_physical_address_t start; + void *addr; + + start = desc->physical_start; + pages = desc->num_pages; + if (pages > required_pages) + { + start += PAGES_TO_BYTES (pages - required_pages); + pages = required_pages; + } + + addr = grub_efi_allocate_pages (start, pages); + if (! addr) + grub_fatal ("cannot allocate conventional memory %p with %u pages", + (void *) ((grub_addr_t) start), + (unsigned) pages); + + grub_mm_init_region (addr, PAGES_TO_BYTES (pages)); + + required_pages -= pages; + if (required_pages == 0) + break; + } + + if (required_pages > 0) + grub_fatal ("too little memory"); +} + +#if 0 +/* Print the memory map. */ +static void +print_memory_map (grub_efi_memory_descriptor_t *memory_map, + grub_efi_uintn_t desc_size, + grub_efi_memory_descriptor_t *memory_map_end) +{ + grub_efi_memory_descriptor_t *desc; + int i; + + for (desc = memory_map, i = 0; + desc < memory_map_end; + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size), i++) + { + grub_printf ("MD: t=%x, p=%llx, v=%llx, n=%llx, a=%llx\n", + desc->type, desc->physical_start, desc->virtual_start, + desc->num_pages, desc->attribute); + } +} +#endif + +void +grub_efi_mm_init (void) +{ + grub_efi_memory_descriptor_t *memory_map; + grub_efi_memory_descriptor_t *memory_map_end; + grub_efi_memory_descriptor_t *filtered_memory_map; + grub_efi_memory_descriptor_t *filtered_memory_map_end; + grub_efi_uintn_t map_size; + grub_efi_uintn_t desc_size; + grub_efi_uint64_t total_pages; + grub_efi_uint64_t required_pages; + int mm_status; + + /* Prepare a memory region to store two memory maps. */ + memory_map = grub_efi_allocate_pages (0, + 2 * BYTES_TO_PAGES (MEMORY_MAP_SIZE)); + if (! memory_map) + grub_fatal ("cannot allocate memory"); + + /* Obtain descriptors for available memory. */ + map_size = MEMORY_MAP_SIZE; + + mm_status = grub_efi_get_memory_map (&map_size, memory_map, 0, &desc_size, 0); + + if (mm_status == 0) + { + grub_efi_free_pages + ((grub_efi_physical_address_t) ((grub_addr_t) memory_map), + 2 * BYTES_TO_PAGES (MEMORY_MAP_SIZE)); + + /* Freeing/allocating operations may increase memory map size. */ + map_size += desc_size * 32; + + memory_map = grub_efi_allocate_pages (0, 2 * BYTES_TO_PAGES (map_size)); + if (! memory_map) + grub_fatal ("cannot allocate memory"); + + mm_status = grub_efi_get_memory_map (&map_size, memory_map, 0, + &desc_size, 0); + } + + if (mm_status < 0) + grub_fatal ("cannot get memory map"); + + memory_map_end = NEXT_MEMORY_DESCRIPTOR (memory_map, map_size); + + filtered_memory_map = memory_map_end; + + filtered_memory_map_end = filter_memory_map (memory_map, filtered_memory_map, + desc_size, memory_map_end); + + /* By default, request a quarter of the available memory. */ + total_pages = get_total_pages (filtered_memory_map, desc_size, + filtered_memory_map_end); + required_pages = (total_pages >> 2); + if (required_pages < BYTES_TO_PAGES (MIN_HEAP_SIZE)) + required_pages = BYTES_TO_PAGES (MIN_HEAP_SIZE); + else if (required_pages > BYTES_TO_PAGES (MAX_HEAP_SIZE)) + required_pages = BYTES_TO_PAGES (MAX_HEAP_SIZE); + + /* Sort the filtered descriptors, so that GRUB can allocate pages + from smaller regions. */ + sort_memory_map (filtered_memory_map, desc_size, filtered_memory_map_end); + + /* Allocate memory regions for GRUB's memory management. */ + add_memory_regions (filtered_memory_map, desc_size, + filtered_memory_map_end, required_pages); + +#if 0 + /* For debug. */ + map_size = MEMORY_MAP_SIZE; + + if (grub_efi_get_memory_map (&map_size, memory_map, 0, &desc_size, 0) < 0) + grub_fatal ("cannot get memory map"); + + grub_printf ("printing memory map\n"); + print_memory_map (memory_map, desc_size, + NEXT_MEMORY_DESCRIPTOR (memory_map, map_size)); + grub_abort (); +#endif + + /* Release the memory maps. */ + grub_efi_free_pages ((grub_addr_t) memory_map, + 2 * BYTES_TO_PAGES (MEMORY_MAP_SIZE)); +} |