[ipxe-devel] [PATCH 1/1 WIP] [efi] setup ibft tables in uefi sanboot mode
Vishvananda Ishaya Abrams
vish.ishaya at oracle.com
Fri Dec 9 02:24:55 UTC 2016
This uses efi functions to register the ibft table when sanbooting in
uefi mode. It mirrors similar functionality in the int13 bios code
path. The AcpiTable.h code is pulled over from the edk2 source.
---
src/include/ipxe/efi/Protocol/AcpiTable.h | 127 ++++++++++++++++++++++++++++++
src/interface/efi/efi_block.c | 92 ++++++++++++++++++++++
2 files changed, 219 insertions(+)
create mode 100644 src/include/ipxe/efi/Protocol/AcpiTable.h
diff --git a/src/include/ipxe/efi/Protocol/AcpiTable.h b/src/include/ipxe/efi/Protocol/AcpiTable.h
new file mode 100644
index 0000000..6149b7e
--- /dev/null
+++ b/src/include/ipxe/efi/Protocol/AcpiTable.h
@@ -0,0 +1,127 @@
+/** @file
+ The file provides the protocol to install or remove an ACPI
+ table from a platform.
+
+ Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __ACPI_TABLE_H___
+#define __ACPI_TABLE_H___
+
+#define EFI_ACPI_TABLE_PROTOCOL_GUID \
+ { 0xffe06bdd, 0x6107, 0x46a6, { 0x7b, 0xb2, 0x5a, 0x9c, 0x7e, 0xc5, 0x27, 0x5c }}
+
+
+typedef struct _EFI_ACPI_TABLE_PROTOCOL EFI_ACPI_TABLE_PROTOCOL;
+
+/**
+
+ The InstallAcpiTable() function allows a caller to install an
+ ACPI table. When successful, the table will be linked by the
+ RSDT/XSDT. AcpiTableBuffer specifies the table to be installed.
+ InstallAcpiTable() will make a copy of the table and insert the
+ copy into the RSDT/XSDT. InstallAcpiTable() must insert the new
+ table at the end of the RSDT/XSDT. To prevent namespace
+ collision, ACPI tables may be created using UEFI ACPI table
+ format. If this protocol is used to install a table with a
+ signature already present in the system, the new table will not
+ replace the existing table. It is a platform implementation
+ decision to add a new table with a signature matching an
+ existing table or disallow duplicate table signatures and
+ return EFI_ACCESS_DENIED. On successful output, TableKey is
+ initialized with a unique key. Its value may be used in a
+ subsequent call to UninstallAcpiTable to remove an ACPI table.
+ If an EFI application is running at the time of this call, the
+ relevant EFI_CONFIGURATION_TABLE pointer to the RSDT is no
+ longer considered valid.
+
+
+ @param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
+
+ @param AcpiTableBuffer A pointer to a buffer containing the
+ ACPI table to be installed.
+
+ @param AcpiTableBufferSize Specifies the size, in bytes, of
+ the AcpiTableBuffer buffer.
+
+
+ @param TableKey Returns a key to refer to the ACPI table.
+
+ @retval EFI_SUCCESS The table was successfully inserted
+
+ @retval EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL,
+ TableKey is NULL, or
+ AcpiTableBufferSize and the size
+ field embedded in the ACPI table
+ pointed to by AcpiTableBuffer
+ are not in sync.
+
+ @retval EFI_OUT_OF_RESOURCES Insufficient resources exist to
+ complete the request.
+ @retval EFI_ACCESS_DENIED The table signature matches a table already
+ present in the system and platform policy
+ does not allow duplicate tables of this type.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_ACPI_TABLE_INSTALL_ACPI_TABLE)(
+ IN EFI_ACPI_TABLE_PROTOCOL *This,
+ IN VOID *AcpiTableBuffer,
+ IN UINTN AcpiTableBufferSize,
+ OUT UINTN *TableKey
+);
+
+
+/**
+
+ The UninstallAcpiTable() function allows a caller to remove an
+ ACPI table. The routine will remove its reference from the
+ RSDT/XSDT. A table is referenced by the TableKey parameter
+ returned from a prior call to InstallAcpiTable(). If an EFI
+ application is running at the time of this call, the relevant
+ EFI_CONFIGURATION_TABLE pointer to the RSDT is no longer
+ considered valid.
+
+ @param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
+
+ @param TableKey Specifies the table to uninstall. The key was
+ returned from InstallAcpiTable().
+
+ @retval EFI_SUCCESS The table was successfully inserted
+
+ @retval EFI_NOT_FOUND TableKey does not refer to a valid key
+ for a table entry.
+
+ @retval EFI_OUT_OF_RESOURCES Insufficient resources exist to
+ complete the request.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE)(
+ IN EFI_ACPI_TABLE_PROTOCOL *This,
+ IN UINTN TableKey
+);
+
+///
+/// The EFI_ACPI_TABLE_PROTOCOL provides the ability for a component
+/// to install and uninstall ACPI tables from a platform.
+///
+struct _EFI_ACPI_TABLE_PROTOCOL {
+ EFI_ACPI_TABLE_INSTALL_ACPI_TABLE InstallAcpiTable;
+ EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE UninstallAcpiTable;
+};
+
+extern EFI_GUID gEfiAcpiTableProtocolGuid;
+
+#endif
+
diff --git a/src/interface/efi/efi_block.c b/src/interface/efi/efi_block.c
index 6240c9b..0609029 100644
--- a/src/interface/efi/efi_block.c
+++ b/src/interface/efi/efi_block.c
@@ -30,6 +30,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*
*/
+#include <registers.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
@@ -44,11 +45,13 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/open.h>
#include <ipxe/retry.h>
#include <ipxe/timer.h>
+#include <ipxe/acpi.h>
#include <ipxe/process.h>
#include <ipxe/sanboot.h>
#include <ipxe/iso9660.h>
#include <ipxe/settings.h>
#include <ipxe/efi/efi.h>
+#include <ipxe/efi/Protocol/AcpiTable.h>
#include <ipxe/efi/Protocol/BlockIo.h>
#include <ipxe/efi/Protocol/SimpleFileSystem.h>
#include <ipxe/efi/efi_driver.h>
@@ -892,6 +895,25 @@ static void efi_block_unhook ( unsigned int drive ) {
ref_put ( &block->refcnt );
}
+/** A boot firmware table generated by iPXE */
+union xbft_table {
+ /** ACPI header */
+ struct acpi_description_header acpi;
+ /** Padding */
+ char pad[768];
+};
+
+/** The boot firmware table generated by iPXE */
+static union xbft_table __bss16 ( xbftab ) __attribute__ (( aligned ( 16 ) ));
+#define xbftab __use_data16 ( xbftab )
+
+/** BOFM1 protocol GUID */
+static EFI_GUID acpi_table_protocol_guid =
+ EFI_ACPI_TABLE_PROTOCOL_GUID;
+
+static BOOLEAN table_installed;
+static UINTN table_key;
+
/**
* Describe EFI block device
*
@@ -899,7 +921,15 @@ static void efi_block_unhook ( unsigned int drive ) {
* @ret rc Return status code
*/
static int efi_block_describe ( unsigned int drive ) {
+ EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct efi_block *block;
+ struct segoff xbft_address;
+ union {
+ EFI_ACPI_TABLE_PROTOCOL *acpi;
+ void *interface;
+ } acpi;
+ EFI_STATUS efirc;
+ int rc;
/* Find block device */
block = efi_block_find ( drive );
@@ -908,6 +938,68 @@ static int efi_block_describe ( unsigned int drive ) {
return -ENODEV;
}
+ /* Locate protocol */
+ if ( ( efirc = bs->LocateProtocol ( &acpi_table_protocol_guid, NULL,
+ &acpi.interface ) ) != 0 ) {
+ rc = -EEFI ( efirc );
+ DBGC ( block, "EFIBLK %02x cannot find ACPI TABLE protocol\n",
+ block->drive );
+ return rc;
+ }
+
+ /* Uninstall existing table */
+ if (table_installed) {
+ /* Install table */
+ if ( ( efirc = acpi.acpi->UninstallAcpiTable ( acpi.acpi,
+ table_key ) ) != 0 ) {
+ rc = -EEFI ( efirc );
+ DBGC ( block, "EFIBLK %02x cannot uninstall table\n",
+ block->drive );
+ return rc;
+ }
+ table_installed = FALSE;
+ }
+
+ /* Clear table */
+ memset ( &xbftab, 0, sizeof ( xbftab ) );
+
+ /* Fill in common parameters */
+ strncpy ( xbftab.acpi.oem_id, "FENSYS",
+ sizeof ( xbftab.acpi.oem_id ) );
+ strncpy ( xbftab.acpi.oem_table_id, "iPXE",
+ sizeof ( xbftab.acpi.oem_table_id ) );
+
+ /* Fill in remaining parameters */
+ if ( ( rc = acpi_describe ( &block->intf, &xbftab.acpi,
+ sizeof ( xbftab ) ) ) != 0 ) {
+ DBGC ( block, "EFIBLK %02x could not create ACPI "
+ "description: %s\n", block->drive, strerror ( rc ) );
+ return rc;
+ }
+
+ /* Fix up ACPI checksum */
+ acpi_fix_checksum ( &xbftab.acpi );
+
+ /* Install table */
+ if ( ( efirc = acpi.acpi->InstallAcpiTable ( acpi.acpi, &xbftab.acpi,
+ xbftab.acpi.length, &table_key ) ) != 0 ) {
+ rc = -EEFI ( efirc );
+ DBGC ( block, "EFIBLK %02x cannot install table\n",
+ block->drive );
+ return rc;
+ }
+ table_installed = TRUE;
+
+ DBGC ( block, "EFIBLK %02x described using boot firmware "
+ "table:\n", block->drive );
+
+ /* The xbft_address isn't necessary for the uefi registration,
+ * but we use it to print out the table in debug mode */
+ xbft_address.segment = rm_ds;
+ xbft_address.offset = __from_data16 ( &xbftab );
+ DBGC_HDA ( block, xbft_address, &xbftab,
+ le32_to_cpu ( xbftab.acpi.length ) );
+
return 0;
}
--
2.5.0
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