Thunk is the code that switches from 32-bit protected environment into the 16-bit real-mode\r
environment. Reverse thunk is the code that does the opposite.\r
\r
- \r
- Copyright (c) 2007 - 2009, Intel Corporation\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials are licensed and made available under \r
+the terms and conditions of the BSD License that accompanies this distribution. \r
+The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php. \r
+ \r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
@par Revision Reference:\r
This protocol is defined in Framework for EFI Compatibility Support Module spec\r
- Version 0.97.\r
+ Version 0.98.\r
\r
**/\r
\r
UINT16 Compatibility16CallOffset;\r
\r
///\r
- /// The segment of the entry point within the traditional BIOS for EfiCompatibility to invoke the PnP installation check.\r
+ /// The segment of the entry point within the traditional BIOS for EfiCompatibility \r
+ /// to invoke the PnP installation check.\r
///\r
UINT16 PnPInstallationCheckSegment;\r
\r
///\r
- /// The Offset of the entry point within the traditional BIOS for EfiCompatibility to invoke the PnP installation check.\r
+ /// The Offset of the entry point within the traditional BIOS for EfiCompatibility \r
+ /// to invoke the PnP installation check.\r
///\r
UINT16 PnPInstallationCheckOffset;\r
\r
///\r
- /// EFI system resources table. Type EFI_SYSTEM_TABLE is defined in the IntelPlatform Innovation Framework for EFI \r
- /// Driver Execution Environment Core Interface Specification (DXE CIS).\r
+ /// EFI system resources table. Type EFI_SYSTEM_TABLE is defined in the IntelPlatform \r
+ ///Innovation Framework for EFI Driver Execution Environment Core Interface Specification (DXE CIS).\r
///\r
UINT32 EfiSystemTable; \r
\r
\r
///\r
/// The 32-bit physical address where the MP table is stored in the traditional BIOS.\r
- /// The EfiCompatibility code will fill in the MpTablePtr value and copy the data to the indicated area.\r
+ /// The EfiCompatibility code will fill in the MpTablePtr value and copy the data \r
+ /// to the indicated area.\r
///\r
UINT32 MpTablePtr;\r
\r
/// Maximum PCI bus number assigned.\r
///\r
UINT8 LastPciBus;\r
+\r
+ ///\r
+ /// Start Address of Upper Memory Area (UMA) to be set as Read/Write. If\r
+ /// UmaAddress is a valid address in the shadow RAM, it also indicates that the region\r
+ /// from 0xC0000 to (UmaAddress - 1) can be used for Option ROM.\r
+ ///\r
+ UINT32 UmaAddress;\r
+\r
+ ///\r
+ /// Upper Memory Area size in bytes to be set as Read/Write. If zero, no UMA region\r
+ /// will be set as Read/Write (i.e. all Shadow RAM is set as Read-Only).\r
+ ///\r
+ UINT32 UmaSize;\r
+\r
+ ///\r
+ /// Start Address of high memory that can be used for permanent allocation. If zero,\r
+ /// high memory is not available for permanent allocation.\r
+ ///\r
+ UINT32 HiPermanentMemoryAddress;\r
+\r
+ ///\r
+ /// Size of high memory that can be used for permanent allocation in bytes. If zero,\r
+ /// high memory is not available for permanent allocation.\r
+ ///\r
+ UINT32 HiPermanentMemorySize;\r
} EFI_COMPATIBILITY16_TABLE;\r
\r
///\r
/// Functions provided by the CSM binary which communicate between the EfiCompatibility \r
/// and Compatability16 code.\r
///\r
-/// Inconsistent with specification here: \r
-/// The member's name started with "Compatibility16" [defined in Intel Framework Compatibility Support Module Specification / 0.97 version] \r
+/// Inconsistent with the specification here: \r
+/// The member's name started with "Compatibility16" [defined in Intel Framework \r
+/// Compatibility Support Module Specification / 0.97 version] \r
/// has been changed to "Legacy16" since keeping backward compatible.\r
///\r
typedef enum {\r
/// EFI_DISPATCH_OPROM_TABLE\r
///\r
typedef struct {\r
- UINT16 PnPInstallationCheckSegment; ///< Pointer to the PnpInstallationCheck data structure.\r
- UINT16 PnPInstallationCheckOffset; ///< Pointer to the PnpInstallationCheck data structure.\r
+ UINT16 PnPInstallationCheckSegment; ///< A pointer to the PnpInstallationCheck data structure.\r
+ UINT16 PnPInstallationCheckOffset; ///< A pointer to the PnpInstallationCheck data structure.\r
UINT16 OpromSegment; ///< The segment where the OpROM was placed. Offset is assumed to be 3.\r
UINT8 PciBus; ///< The PCI bus.\r
UINT8 PciDeviceFunction; ///< The PCI device * 0x08 | PCI function.\r
UINT8 NumberBbsEntries; ///< The number of valid BBS table entries upon entry and exit. The IBV code may\r
///< increase this number, if BBS-compliant devices also hook INTs in order to force the\r
///< OpROM BIOS Setup to be executed.\r
- VOID *BbsTablePointer; ///< Pointer to the BBS table.\r
+ UINT32 BbsTablePointer; ///< A pointer to the BBS table.\r
UINT16 RuntimeSegment; ///< The segment where the OpROM can be relocated to. If this value is 0x0000, this\r
///< means that the relocation of this run time code is not supported.\r
///< Inconsistent with specification here: \r
UINT32 BiosLessThan1MB;\r
\r
///\r
- /// Starting address of the high memory block.\r
+ /// The starting address of the high memory block.\r
///\r
UINT32 HiPmmMemory;\r
\r
///\r
- /// Length of high memory block.\r
+ /// The length of high memory block.\r
///\r
UINT32 HiPmmMemorySizeInBytes;\r
\r
UINT32 LowPmmMemory;\r
\r
///\r
- /// Length of low Memory block.\r
+ /// The length of low Memory block.\r
///\r
UINT32 LowPmmMemorySizeInBytes;\r
} EFI_TO_COMPATIBILITY16_INIT_TABLE;\r
\r
///\r
-/// DEVICE_PRODUCER_SERIAL\r
+/// DEVICE_PRODUCER_SERIAL.\r
///\r
typedef struct {\r
- UINT16 Address; ///< I/O address assigned to the serial port\r
+ UINT16 Address; ///< I/O address assigned to the serial port.\r
UINT8 Irq; ///< IRQ assigned to the serial port.\r
SERIAL_MODE Mode; ///< Mode of serial port. Values are defined below.\r
} DEVICE_PRODUCER_SERIAL;\r
\r
///\r
-/// DEVICE_PRODUCER_SERIAL's modes\r
+/// DEVICE_PRODUCER_SERIAL's modes.\r
///@{\r
#define DEVICE_SERIAL_MODE_NORMAL 0x00\r
#define DEVICE_SERIAL_MODE_IRDA 0x01\r
///@)\r
\r
///\r
-/// DEVICE_PRODUCER_PARALLEL\r
+/// DEVICE_PRODUCER_PARALLEL.\r
///\r
typedef struct {\r
- UINT16 Address; ///< I/O address assigned to the parallel port\r
+ UINT16 Address; ///< I/O address assigned to the parallel port.\r
UINT8 Irq; ///< IRQ assigned to the parallel port.\r
UINT8 Dma; ///< DMA assigned to the parallel port.\r
PARALLEL_MODE Mode; ///< Mode of the parallel port. Values are defined below.\r
} DEVICE_PRODUCER_PARALLEL;\r
\r
///\r
-/// DEVICE_PRODUCER_PARALLEL's modes\r
+/// DEVICE_PRODUCER_PARALLEL's modes.\r
///@{\r
#define DEVICE_PARALLEL_MODE_MODE_OUTPUT_ONLY 0x00\r
#define DEVICE_PARALLEL_MODE_MODE_BIDIRECTIONAL 0x01\r
/// DEVICE_PRODUCER_FLOPPY\r
///\r
typedef struct {\r
- UINT16 Address; ///< I/O address assigned to the floppy\r
+ UINT16 Address; ///< I/O address assigned to the floppy.\r
UINT8 Irq; ///< IRQ assigned to the floppy.\r
UINT8 Dma; ///< DMA assigned to the floppy.\r
UINT8 NumberOfFloppy; ///< Number of floppies in the system.\r
UINT16 ControlBaseAddress;\r
\r
///\r
- /// Bus master address\r
+ /// Bus master address.\r
///\r
UINT16 BusMasterAddress;\r
\r
UINT8 HddIrq;\r
\r
///\r
- /// Data that identifies the drive data, one per possible attached drive\r
+ /// Data that identifies the drive data; one per possible attached drive.\r
///\r
ATAPI_IDENTIFY IdentifyDrive[2];\r
} HDD_INFO;\r
#define HDD_SLAVE_ATAPI_ZIPDISK 0x80\r
\r
///\r
-/// BBS_STATUS_FLAGS\r
+/// BBS_STATUS_FLAGS;\.\r
///\r
typedef struct {\r
UINT16 OldPosition : 4; ///< Prior priority.\r
} BBS_STATUS_FLAGS;\r
\r
///\r
-/// BBS_TABLE, device type values & boot priority values\r
+/// BBS_TABLE, device type values & boot priority values.\r
///\r
typedef struct {\r
///\r
UINT16 Type : 3;\r
\r
///\r
- /// Size of "port" in bits. Defined values are below.\r
+ /// The size of "port" in bits. Defined values are below.\r
///\r
UINT16 PortGranularity : 3;\r
\r
///\r
- /// Size of data in bits. Defined values are below.\r
+ /// The size of data in bits. Defined values are below.\r
///\r
UINT16 DataGranularity : 3;\r
\r
} SMM_ATTRIBUTES;\r
\r
///\r
-/// SMM_ATTRIBUTES type values\r
+/// SMM_ATTRIBUTES type values.\r
///@{\r
#define STANDARD_IO 0x00\r
#define STANDARD_MEMORY 0x01\r
///@}\r
\r
///\r
-/// SMM_ATTRIBUTES port size constants\r
+/// SMM_ATTRIBUTES port size constants.\r
///@{\r
#define PORT_SIZE_8 0x00\r
#define PORT_SIZE_16 0x01\r
///@}\r
\r
///\r
-/// SMM_ATTRIBUTES data size constants\r
+/// SMM_ATTRIBUTES data size constants.\r
///@{\r
#define DATA_SIZE_8 0x00\r
#define DATA_SIZE_16 0x01\r
///@}\r
\r
///\r
-/// SMM_FUNCTION & relating constants\r
+/// SMM_FUNCTION & relating constants.\r
///\r
typedef struct {\r
UINT16 Function : 15;\r
} SMM_FUNCTION;\r
\r
///\r
-/// SMM_FUNCTION Function constants\r
+/// SMM_FUNCTION Function constants.\r
///@{\r
#define INT15_D042 0x0000\r
#define GET_USB_BOOT_INFO 0x0001\r
///@}\r
\r
///\r
-/// SMM_FUNCTION Owner constants\r
+/// SMM_FUNCTION Owner constants.\r
///@{\r
#define STANDARD_OWNER 0x0\r
#define OEM_OWNER 0x1\r
SMM_FUNCTION SmmFunction;\r
\r
///\r
- /// SmmPort size depends upon SmmAttributes and ranges from2 bytes to 16 bytes\r
+ /// SmmPort size depends upon SmmAttributes and ranges from2 bytes to 16 bytes.\r
///\r
UINT8 SmmPort;\r
\r
///\r
- /// SmmData size depends upon SmmAttributes and ranges from2 bytes to 16 bytes\r
+ /// SmmData size depends upon SmmAttributes and ranges from2 bytes to 16 bytes.\r
///\r
UINT8 SmmData;\r
} SMM_ENTRY;\r
typedef struct {\r
UINT16 MajorVersion; ///< The EfiCompatibility major version number.\r
UINT16 MinorVersion; ///< The EfiCompatibility minor version number.\r
- UINT32 AcpiTable; ///< Location of the RSDT ACPI table. < 4G range\r
- UINT32 SmbiosTable; ///< Location of the SMBIOS table in EFI memory. < 4G range\r
+ UINT32 AcpiTable; ///< The location of the RSDT ACPI table. < 4G range.\r
+ UINT32 SmbiosTable; ///< The location of the SMBIOS table in EFI memory. < 4G range.\r
UINT32 SmbiosTableLength;\r
//\r
// Legacy SIO state\r
//\r
HDD_INFO HddInfo[MAX_IDE_CONTROLLER]; ///< Hard disk drive information, including raw Identify Drive data.\r
UINT32 NumberBbsEntries; ///< Number of entries in the BBS table\r
- UINT32 BbsTable; ///< Pointer to the BBS table. Type BBS_TABLE is defined below.\r
- UINT32 SmmTable; ///< Pointer to the SMM table. Type SMM_TABLE is defined below.\r
+ UINT32 BbsTable; ///< A pointer to the BBS table. Type BBS_TABLE is defined below.\r
+ UINT32 SmmTable; ///< A pointer to the SMM table. Type SMM_TABLE is defined below.\r
UINT32 OsMemoryAbove1Mb; ///< The amount of usable memory above 1 MB, i.e. E820 type 1 memory. This value can\r
///< differ from the value in EFI_TO_COMPATIBILITY16_INIT_TABLE as more\r
///< memory may have been discovered.\r
typedef struct _EFI_LEGACY_BIOS_PROTOCOL EFI_LEGACY_BIOS_PROTOCOL;\r
\r
///\r
-/// Flags returned by CheckPciRom()\r
+/// Flags returned by CheckPciRom().\r
///\r
#define NO_ROM 0x00\r
#define ROM_FOUND 0x01\r
#define VALID_LEGACY_ROM 0x02\r
-#define ROM_WITH_CONFIG 0x04 ///< Not defined in the Framework CSM Specification\r
+#define ROM_WITH_CONFIG 0x04 ///< Not defined in the Framework CSM Specification.\r
\r
///\r
/// The following macros do not appear in the Framework CSM Specification and \r
/// are kept for backward compatibility only. They convert 32-bit address (_Adr) \r
/// to Segment:Offset 16-bit form.\r
///\r
-/// @{\r
+///@{\r
#define EFI_SEGMENT(_Adr) (UINT16) ((UINT16) (((UINTN) (_Adr)) >> 4) & 0xf000)\r
#define EFI_OFFSET(_Adr) (UINT16) (((UINT16) ((UINTN) (_Adr))) & 0xffff)\r
-/// @}\r
+///@}\r
\r
#define CARRY_FLAG 0x01\r
\r
of BiosInt. Regs will contain the 16-bit register context on entry and\r
exit.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] BiosInt Processor interrupt vector to invoke\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] BiosInt The processor interrupt vector to invoke.\r
@param[in,out] Reg Register contexted passed into (and returned) from thunk to\r
- 16-bit mode\r
+ 16-bit mode.\r
\r
@retval TRUE Thunk completed with no BIOS errors in the target code. See Regs for status. \r
@retval FALSE There was a BIOS error in the target code.\r
16-bit register context on entry and exit. Arguments can be passed on\r
the Stack argument\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] Segment Segemnt of 16-bit mode call\r
- @param[in] Offset Offset of 16-bit mdoe call\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] Segment The segemnt of 16-bit mode call.\r
+ @param[in] Offset The offset of 16-bit mdoe call.\r
@param[in] Reg Register contexted passed into (and returned) from thunk to\r
- 16-bit mode\r
- @param[in] Stack Caller allocated stack used to pass arguments\r
- @param[in] StackSize Size of Stack in bytes\r
+ 16-bit mode.\r
+ @param[in] Stack The caller allocated stack used to pass arguments.\r
+ @param[in] StackSize The size of Stack in bytes.\r
\r
@retval FALSE Thunk completed with no BIOS errors in the target code. See Regs for status. @retval TRUE There was a BIOS error in the target code.\r
**/\r
Test to see if a legacy PCI ROM exists for this device. Optionally return\r
the Legacy ROM instance for this PCI device.\r
\r
- @param[in] This Protocol instance pointer.\r
+ @param[in] This The protocol instance pointer.\r
@param[in] PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded\r
- @param[out] RomImage Return the legacy PCI ROM for this device\r
- @param[out] RomSize Size of ROM Image\r
+ @param[out] RomImage Return the legacy PCI ROM for this device.\r
+ @param[out] RomSize The size of ROM Image.\r
@param[out] Flags Indicates if ROM found and if PC-AT. Multiple bits can be set as follows:\r
- - 00 = No ROM\r
- - 01 = ROM Found\r
- - 02 = ROM is a valid legacy ROM\r
+ - 00 = No ROM.\r
+ - 01 = ROM Found.\r
+ - 02 = ROM is a valid legacy ROM.\r
\r
- @retval EFI_SUCCESS Legacy Option ROM availible for this device\r
- @retval EFI_UNSUPPORTED Legacy Option ROM not supported.\r
+ @retval EFI_SUCCESS The Legacy Option ROM available for this device\r
+ @retval EFI_UNSUPPORTED The Legacy Option ROM is not supported.\r
\r
**/\r
typedef\r
about how many disks were added by the OPROM and the shadow address and\r
size. DiskStart & DiskEnd are INT 13h drive letters. Thus 0x80 is C:\r
\r
- @param[in] This Protocol instance pointer.\r
+ @param[in] This The protocol instance pointer.\r
@param[in] PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded.\r
This value is NULL if RomImage is non-NULL. This is the normal\r
case.\r
- 00 = No ROM.\r
- 01 = ROM found.\r
- 02 = ROM is a valid legacy ROM.\r
- @param[out] DiskStart Disk number of first device hooked by the ROM. If DiskStart\r
+ @param[out] DiskStart The disk number of first device hooked by the ROM. If DiskStart\r
is the same as DiskEnd no disked were hooked.\r
@param[out] DiskEnd disk number of the last device hooked by the ROM.\r
- @param[out] RomShadowAddress Shadow address of PC-AT ROM\r
- @param[out] RomShadowSize Size of RomShadowAddress in bytes\r
+ @param[out] RomShadowAddress Shadow address of PC-AT ROM.\r
+ @param[out] RomShadowSize Size of RomShadowAddress in bytes.\r
\r
@retval EFI_SUCCESS Thunk completed, see Regs for status.\r
@retval EFI_INVALID_PARAMETER PciHandle not found\r
manner--meaning that the EFI code is still valid. An ungraceful boot failure causes a reset because the state\r
of EFI code is unknown.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] BootOption EFI Device Path from BootXXXX variable.\r
- @param[in] LoadOptionSize Size of LoadOption in size.\r
- @param[in] LoadOption LoadOption from BootXXXX variable\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] BootOption The EFI Device Path from BootXXXX variable.\r
+ @param[in] LoadOptionSize The size of LoadOption in size.\r
+ @param[in] LoadOption LThe oadOption from BootXXXX variable.\r
\r
@retval EFI_DEVICE_ERROR Failed to boot from any boot device and memory is uncorrupted. Note: This function normally does not returns. It will either boot the OS or reset the system if memory has been "corrupted" by loading a boot sector and passing control to it.\r
**/\r
keyboard options such as boot with NUM LOCK on/off. This function does not\r
touch the keyboard or keyboard LEDs but only the BDA.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] Leds Status of current Scroll, Num & Cap lock LEDS\r
- - Bit 0 is Scroll Lock 0 = Not locked\r
- - Bit 1 is Num Lock\r
- - Bit 2 is Caps Lock\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] Leds The status of current Scroll, Num & Cap lock LEDS:\r
+ - Bit 0 is Scroll Lock 0 = Not locked.\r
+ - Bit 1 is Num Lock.\r
+ - Bit 2 is Caps Lock.\r
\r
@retval EFI_SUCCESS The BDA was updated successfully.\r
\r
/**\r
Retrieve legacy BBS info and assign boot priority.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[out] HddCount Number of HDD_INFO structures\r
- @param[out] HddInfo Onboard IDE controller information\r
- @param[out] BbsCount Number of BBS_TABLE structures\r
- @param[in,out] BbsTable Point to List of BBS_TABLE\r
+ @param[in] This The protocol instance pointer.\r
+ @param[out] HddCount The number of HDD_INFO structures.\r
+ @param[out] HddInfo Onboard IDE controller information.\r
+ @param[out] BbsCount The number of BBS_TABLE structures.\r
+ @param[in,out] BbsTable Points to List of BBS_TABLE.\r
\r
- @retval EFI_SUCCESS Tables returned\r
+ @retval EFI_SUCCESS Tables were returned.\r
\r
**/\r
typedef\r
Assign drive number to legacy HDD drives prior to booting an EFI\r
aware OS so the OS can access drives without an EFI driver.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[out] BbsCount Number of BBS_TABLE structures\r
- @param[out] BbsTable List BBS entries\r
+ @param[in] This The protocol instance pointer.\r
+ @param[out] BbsCount The number of BBS_TABLE structures\r
+ @param[out] BbsTable List of BBS entries\r
\r
- @retval EFI_SUCCESS Drive numbers assigned\r
+ @retval EFI_SUCCESS Drive numbers assigned.\r
\r
**/\r
typedef\r
To boot from an unconventional device like parties and/or execute\r
HDD diagnostics.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] Attributes How to interpret the other input parameters\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] Attributes How to interpret the other input parameters.\r
@param[in] BbsEntry The 0-based index into the BbsTable for the parent\r
device.\r
- @param[in] BeerData Pointer to the 128 bytes of ram BEER data.\r
- @param[in] ServiceAreaData Pointer to the 64 bytes of raw Service Area data. The\r
+ @param[in] BeerData A pointer to the 128 bytes of ram BEER data.\r
+ @param[in] ServiceAreaData A pointer to the 64 bytes of raw Service Area data. The\r
caller must provide a pointer to the specific Service\r
Area and not the start all Service Areas.\r
\r
/**\r
Shadow all legacy16 OPROMs that haven't been shadowed.\r
Warning: Use this with caution. This routine disconnects all EFI\r
- drivers. If used externally then caller must re-connect EFI\r
+ drivers. If used externally, then the caller must re-connect EFI\r
drivers.\r
\r
- @param[in] This Protocol instance pointer.\r
+ @param[in] This The protocol instance pointer.\r
\r
- @retval EFI_SUCCESS OPROMs shadowed\r
+ @retval EFI_SUCCESS OPROMs were shadowed.\r
\r
**/\r
typedef\r
/**\r
Get a region from the LegacyBios for S3 usage.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] LegacyMemorySize Size of required region\r
- @param[in] Region Region to use.\r
- 00 = Either 0xE0000 or 0xF0000 block\r
- - Bit0 = 1 0xF0000 block\r
- - Bit1 = 1 0xE0000 block\r
- @param[in] Alignment Address alignment. Bit mapped. First non-zero\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] LegacyMemorySize The size of required region.\r
+ @param[in] Region The region to use.\r
+ 00 = Either 0xE0000 or 0xF0000 block.\r
+ - Bit0 = 1 0xF0000 block.\r
+ - Bit1 = 1 0xE0000 block.\r
+ @param[in] Alignment Address alignment. Bit mapped. The first non-zero\r
bit from right is alignment.\r
- @param[out] LegacyMemoryAddress Region Assigned\r
+ @param[out] LegacyMemoryAddress The Region Assigned\r
\r
- @retval EFI_SUCCESS Region assigned\r
+ @retval EFI_SUCCESS The Region was assigned.\r
@retval EFI_ACCESS_DENIED The function was previously invoked.\r
- @retval Other Region not assigned\r
+ @retval Other The Region was not assigned.\r
\r
**/\r
typedef\r
/**\r
Get a region from the LegacyBios for Tiano usage. Can only be invoked once.\r
\r
- @param[in] This Protocol instance pointer.\r
- @param[in] LegacyMemorySize Size of data to copy\r
- @param[in] LegacyMemoryAddress Legacy Region destination address\r
+ @param[in] This The protocol instance pointer.\r
+ @param[in] LegacyMemorySize The size of data to copy.\r
+ @param[in] LegacyMemoryAddress The Legacy Region destination address.\r
Note: must be in region assigned by\r
- LegacyBiosGetLegacyRegion\r
- @param[in] LegacyMemorySourceAddress Source of the data to copy.\r
+ LegacyBiosGetLegacyRegion.\r
+ @param[in] LegacyMemorySourceAddress The source of the data to copy.\r
\r
- @retval EFI_SUCCESS Region assigned\r
- @retval EFI_ACCESS_DENIED Destination outside assigned region\r
+ @retval EFI_SUCCESS The Region assigned.\r
+ @retval EFI_ACCESS_DENIED Destination was outside an assigned region.\r
\r
**/\r
typedef\r
EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE BootUnconventionalDevice;\r
};\r
\r
+//\r
+// Legacy BIOS needs to access memory in page 0 (0-4095), which is disabled if\r
+// NULL pointer detection feature is enabled. Following macro can be used to\r
+// enable/disable page 0 before/after accessing it.\r
+//\r
+#define ACCESS_PAGE0_CODE(statements) \\r
+ do { \\r
+ EFI_STATUS Status_; \\r
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR Desc_; \\r
+ \\r
+ Desc_.Attributes = 0; \\r
+ Status_ = gDS->GetMemorySpaceDescriptor (0, &Desc_); \\r
+ ASSERT_EFI_ERROR (Status_); \\r
+ if ((Desc_.Attributes & EFI_MEMORY_RP) != 0) { \\r
+ Status_ = gDS->SetMemorySpaceAttributes ( \\r
+ 0, \\r
+ EFI_PAGES_TO_SIZE(1), \\r
+ Desc_.Attributes & ~(UINT64)EFI_MEMORY_RP \\r
+ ); \\r
+ ASSERT_EFI_ERROR (Status_); \\r
+ } \\r
+ \\r
+ { \\r
+ statements; \\r
+ } \\r
+ \\r
+ if ((Desc_.Attributes & EFI_MEMORY_RP) != 0) { \\r
+ Status_ = gDS->SetMemorySpaceAttributes ( \\r
+ 0, \\r
+ EFI_PAGES_TO_SIZE(1), \\r
+ Desc_.Attributes \\r
+ ); \\r
+ ASSERT_EFI_ERROR (Status_); \\r
+ } \\r
+ } while (FALSE)\r
+\r
extern EFI_GUID gEfiLegacyBiosProtocolGuid;\r
\r
#endif\r
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