diff options
Diffstat (limited to 'ArmPkg/Application/LinuxLoader/AArch64/LinuxStarter.c')
| -rw-r--r-- | ArmPkg/Application/LinuxLoader/AArch64/LinuxStarter.c | 370 |
1 files changed, 0 insertions, 370 deletions
diff --git a/ArmPkg/Application/LinuxLoader/AArch64/LinuxStarter.c b/ArmPkg/Application/LinuxLoader/AArch64/LinuxStarter.c deleted file mode 100644 index d82cf85111..0000000000 --- a/ArmPkg/Application/LinuxLoader/AArch64/LinuxStarter.c +++ /dev/null @@ -1,370 +0,0 @@ -/** @file
-*
-* Copyright (c) 2011-2015, ARM Limited. All rights reserved.
-*
-* 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.
-*
-**/
-
-#include <Library/ArmLib.h>
-#include <Library/ArmGicLib.h>
-#include <Library/IoLib.h>
-#include <Library/PcdLib.h>
-
-#include <Ppi/ArmMpCoreInfo.h>
-
-#include <Guid/Fdt.h>
-
-#include "LinuxLoader.h"
-
-/*
- Linux kernel booting: Look at the doc in the Kernel source :
- Documentation/arm64/booting.txt
- The kernel image must be placed at the start of the memory to be used by the
- kernel (2MB aligned) + 0x80000.
-
- The Device tree blob is expected to be under 2MB and be within the first 512MB
- of kernel memory and be 2MB aligned.
-
- A Flattened Device Tree (FDT) used to boot linux needs to be updated before
- the kernel is started. It needs to indicate how secondary cores are brought up
- and where they are waiting before loading Linux. The FDT also needs to hold
- the correct kernel command line and filesystem RAM-disk information.
- At the moment we do not fully support generating this FDT information at
- runtime. A prepared FDT should be provided at boot. FDT is the only supported
- method for booting the AArch64 Linux kernel.
-
- Linux does not use any runtime services at this time, so we can let it
- overwrite UEFI.
-*/
-
-
-#define LINUX_ALIGN_VAL (0x080000) // 2MB + 0x80000 mask
-#define LINUX_ALIGN_MASK (0x1FFFFF) // Bottom 21bits
-#define ALIGN_2MB(addr) ALIGN_POINTER(addr , (2*1024*1024))
-
-/* ARM32 and AArch64 kernel handover differ.
- * x0 is set to FDT base.
- * x1-x3 are reserved for future use and should be set to zero.
- */
-typedef VOID (*LINUX_KERNEL64)(UINTN ParametersBase, UINTN Reserved0,
- UINTN Reserved1, UINTN Reserved2);
-
-/* These externs are used to relocate some ASM code into Linux memory. */
-extern VOID *SecondariesPenStart;
-extern VOID *SecondariesPenEnd;
-extern UINTN *AsmMailboxbase;
-
-
-STATIC
-VOID
-PreparePlatformHardware (
- VOID
- )
-{
- //Note: Interrupts will be disabled by the GIC driver when ExitBootServices() will be called.
-
- // Clean before Disable else the Stack gets corrupted with old data.
- ArmCleanDataCache ();
- ArmDisableDataCache ();
- // Invalidate all the entries that might have snuck in.
- ArmInvalidateDataCache ();
-
- // Disable and invalidate the instruction cache
- ArmDisableInstructionCache ();
- ArmInvalidateInstructionCache ();
-
- // Turn off MMU
- ArmDisableMmu ();
-}
-
-STATIC
-EFI_STATUS
-StartLinux (
- IN EFI_PHYSICAL_ADDRESS LinuxImage,
- IN UINTN LinuxImageSize,
- IN EFI_PHYSICAL_ADDRESS FdtBlobBase,
- IN UINTN FdtBlobSize
- )
-{
- EFI_STATUS Status;
- LINUX_KERNEL64 LinuxKernel = (LINUX_KERNEL64)LinuxImage;
-
- // Send msg to secondary cores to go to the kernel pen.
- ArmGicSendSgiTo (PcdGet64 (PcdGicDistributorBase), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E, PcdGet32 (PcdGicSgiIntId));
-
- // Shut down UEFI boot services. ExitBootServices() will notify every driver that created an event on
- // ExitBootServices event. Example the Interrupt DXE driver will disable the interrupts on this event.
- Status = ShutdownUefiBootServices ();
- if (EFI_ERROR (Status)) {
- DEBUG ((EFI_D_ERROR, "ERROR: Can not shutdown UEFI boot services. Status=0x%X\n", Status));
- return Status;
- }
-
- // Check if the Linux Image is a uImage
- if (*(UINTN*)LinuxKernel == LINUX_UIMAGE_SIGNATURE) {
- // Assume the Image Entry Point is just after the uImage header (64-byte size)
- LinuxKernel = (LINUX_KERNEL64)((UINTN)LinuxKernel + 64);
- LinuxImageSize -= 64;
- }
-
- //
- // Switch off interrupts, caches, mmu, etc
- //
- PreparePlatformHardware ();
-
- // Register and print out performance information
- PERF_END (NULL, "BDS", NULL, 0);
- if (PerformanceMeasurementEnabled ()) {
- PrintPerformance ();
- }
-
- //
- // Start the Linux Kernel
- //
-
- // x1-x3 are reserved (set to zero) for future use.
- LinuxKernel ((UINTN)FdtBlobBase, 0, 0, 0);
-
- // Kernel should never exit
- // After Life services are not provided
- ASSERT (FALSE);
-
- // We cannot recover the execution at this stage
- while (1);
-}
-
-/**
- Start a Linux kernel from a Device Path
-
- @param SystemMemoryBase Base of the system memory
- @param LinuxKernel Device Path to the Linux Kernel
- @param Parameters Linux kernel arguments
- @param Fdt Device Path to the Flat Device Tree
- @param MachineType ARM machine type value
-
- @retval EFI_SUCCESS All drivers have been connected
- @retval EFI_NOT_FOUND The Linux kernel Device Path has not been found
- @retval EFI_OUT_OF_RESOURCES There is not enough resource memory to store the matching results.
- @retval RETURN_UNSUPPORTED ATAG is not support by this architecture
-
-**/
-EFI_STATUS
-BootLinuxAtag (
- IN EFI_PHYSICAL_ADDRESS SystemMemoryBase,
- IN EFI_DEVICE_PATH_PROTOCOL* LinuxKernelDevicePath,
- IN EFI_DEVICE_PATH_PROTOCOL* InitrdDevicePath,
- IN CONST CHAR8* CommandLineArguments,
- IN UINTN MachineType
- )
-{
- // NOTE : AArch64 Linux kernel does not support ATAG, FDT only.
- ASSERT (0);
-
- return EFI_UNSUPPORTED;
-}
-
-/**
- Start a Linux kernel from a Device Path
-
- @param[in] LinuxKernelDevicePath Device Path to the Linux Kernel
- @param[in] InitrdDevicePath Device Path to the Initrd
- @param[in] Arguments Linux kernel arguments
-
- @retval EFI_SUCCESS All drivers have been connected
- @retval EFI_NOT_FOUND The Linux kernel Device Path has not been found
- @retval EFI_OUT_OF_RESOURCES There is not enough resource memory to store the matching results.
-
-**/
-EFI_STATUS
-BootLinuxFdt (
- IN EFI_PHYSICAL_ADDRESS SystemMemoryBase,
- IN EFI_DEVICE_PATH_PROTOCOL* LinuxKernelDevicePath,
- IN EFI_DEVICE_PATH_PROTOCOL* InitrdDevicePath,
- IN EFI_DEVICE_PATH_PROTOCOL* FdtDevicePath,
- IN CONST CHAR8* Arguments
- )
-{
- EFI_STATUS Status;
- EFI_STATUS PenBaseStatus;
- UINTN LinuxImageSize;
- UINTN InitrdImageSize;
- UINTN InitrdImageBaseSize;
- VOID *InstalledFdtBase;
- UINTN FdtBlobSize;
- EFI_PHYSICAL_ADDRESS FdtBlobBase;
- EFI_PHYSICAL_ADDRESS LinuxImage;
- EFI_PHYSICAL_ADDRESS InitrdImage;
- EFI_PHYSICAL_ADDRESS InitrdImageBase;
- ARM_PROCESSOR_TABLE *ArmProcessorTable;
- ARM_CORE_INFO *ArmCoreInfoTable;
- UINTN Index;
- EFI_PHYSICAL_ADDRESS PenBase;
- UINTN PenSize;
- UINTN MailBoxBase;
-
- PenBaseStatus = EFI_UNSUPPORTED;
- PenSize = 0;
- InitrdImage = 0;
- InitrdImageSize = 0;
- InitrdImageBase = 0;
- InitrdImageBaseSize = 0;
-
- PERF_START (NULL, "BDS", NULL, 0);
-
- //
- // Load the Linux kernel from a device path
- //
-
- // Try to put the kernel at the start of RAM so as to give it access to all memory.
- // If that fails fall back to try loading it within LINUX_KERNEL_MAX_OFFSET of memory start.
- LinuxImage = SystemMemoryBase + 0x80000;
- Status = BdsLoadImage (LinuxKernelDevicePath, AllocateAddress, &LinuxImage, &LinuxImageSize);
- if (EFI_ERROR (Status)) {
- // Try again but give the loader more freedom of where to put the image.
- LinuxImage = LINUX_KERNEL_MAX_OFFSET;
- Status = BdsLoadImage (LinuxKernelDevicePath, AllocateMaxAddress, &LinuxImage, &LinuxImageSize);
- if (EFI_ERROR (Status)) {
- Print (L"ERROR: Did not find Linux kernel (%r).\n", Status);
- return Status;
- }
- }
- // Adjust the kernel location slightly if required. The kernel needs to be placed at start
- // of memory (2MB aligned) + 0x80000.
- if ((LinuxImage & LINUX_ALIGN_MASK) != LINUX_ALIGN_VAL) {
- LinuxImage = (EFI_PHYSICAL_ADDRESS)CopyMem (ALIGN_2MB (LinuxImage) + 0x80000, (VOID*)(UINTN)LinuxImage, LinuxImageSize);
- }
-
- if (InitrdDevicePath) {
- InitrdImageBase = LINUX_KERNEL_MAX_OFFSET;
- Status = BdsLoadImage (InitrdDevicePath, AllocateMaxAddress, &InitrdImageBase, &InitrdImageBaseSize);
- if (Status == EFI_OUT_OF_RESOURCES) {
- Status = BdsLoadImage (InitrdDevicePath, AllocateAnyPages, &InitrdImageBase, &InitrdImageBaseSize);
- }
- if (EFI_ERROR (Status)) {
- Print (L"ERROR: Did not find initrd image (%r).\n", Status);
- goto EXIT_FREE_LINUX;
- }
-
- // Check if the initrd is a uInitrd
- if (*(UINTN*)((UINTN)InitrdImageBase) == LINUX_UIMAGE_SIGNATURE) {
- // Skip the 64-byte image header
- InitrdImage = (EFI_PHYSICAL_ADDRESS)((UINTN)InitrdImageBase + 64);
- InitrdImageSize = InitrdImageBaseSize - 64;
- } else {
- InitrdImage = InitrdImageBase;
- InitrdImageSize = InitrdImageBaseSize;
- }
- }
-
- if (FdtDevicePath == NULL) {
- //
- // Get the FDT from the Configuration Table.
- // The FDT will be reloaded in PrepareFdt() to a more appropriate
- // location for the Linux Kernel.
- //
- Status = EfiGetSystemConfigurationTable (&gFdtTableGuid, &InstalledFdtBase);
- if (EFI_ERROR (Status)) {
- Print (L"ERROR: Did not get the Device Tree blob (%r).\n", Status);
- goto EXIT_FREE_INITRD;
- }
- FdtBlobBase = (EFI_PHYSICAL_ADDRESS)InstalledFdtBase;
- FdtBlobSize = fdt_totalsize (InstalledFdtBase);
- } else {
- //
- // FDT device path explicitly defined. The FDT is relocated later to a
- // more appropriate location for the Linux kernel.
- //
- FdtBlobBase = LINUX_KERNEL_MAX_OFFSET;
- Status = BdsLoadImage (FdtDevicePath, AllocateMaxAddress, &FdtBlobBase, &FdtBlobSize);
- if (EFI_ERROR (Status)) {
- Print (L"ERROR: Did not find Device Tree blob (%r).\n", Status);
- goto EXIT_FREE_INITRD;
- }
- }
-
- //
- // Install secondary core pens if the Power State Coordination Interface is not supported
- //
- if (FeaturePcdGet (PcdArmLinuxSpinTable)) {
- // Place Pen at the start of Linux memory. We can then tell Linux to not use this bit of memory
- PenBase = LinuxImage - 0x80000;
- PenSize = (UINTN)&SecondariesPenEnd - (UINTN)&SecondariesPenStart;
-
- // Reserve the memory as RuntimeServices
- PenBaseStatus = gBS->AllocatePages (AllocateAddress, EfiRuntimeServicesCode, EFI_SIZE_TO_PAGES (PenSize), &PenBase);
- if (EFI_ERROR (PenBaseStatus)) {
- Print (L"Warning: Failed to reserve the memory required for the secondary cores at 0x%lX, Status = %r\n", PenBase, PenBaseStatus);
- // Even if there is a risk of memory corruption we carry on
- }
-
- // Put mailboxes below the pen code so we know where they are relative to code.
- MailBoxBase = (UINTN)PenBase + ((UINTN)&SecondariesPenEnd - (UINTN)&SecondariesPenStart);
- // Make sure this is 8 byte aligned.
- if (MailBoxBase % sizeof (MailBoxBase) != 0) {
- MailBoxBase += sizeof (MailBoxBase) - MailBoxBase % sizeof (MailBoxBase);
- }
-
- CopyMem ( (VOID*)(PenBase), (VOID*)&SecondariesPenStart, PenSize);
-
- // Update the MailboxBase variable used in the pen code
- *(UINTN*)(PenBase + ((UINTN)&AsmMailboxbase - (UINTN)&SecondariesPenStart)) = MailBoxBase;
-
- for (Index = 0; Index < gST->NumberOfTableEntries; Index++) {
- // Check for correct GUID type
- if (CompareGuid (&gArmMpCoreInfoGuid, &(gST->ConfigurationTable[Index].VendorGuid))) {
- UINTN i;
-
- // Get them under our control. Move from depending on 32bit reg(sys_flags) and SWI
- // to 64 bit addr and WFE
- ArmProcessorTable = (ARM_PROCESSOR_TABLE *)gST->ConfigurationTable[Index].VendorTable;
- ArmCoreInfoTable = ArmProcessorTable->ArmCpus;
-
- for (i = 0; i < ArmProcessorTable->NumberOfEntries; i++ ) {
- // This goes into the SYSFLAGS register for the VE platform. We only have one 32bit reg to use
- MmioWrite32 (ArmCoreInfoTable[i].MailboxSetAddress, (UINTN)PenBase);
-
- // So FDT can set the mailboxes correctly with the parser. These are 64bit Memory locations.
- ArmCoreInfoTable[i].MailboxSetAddress = (UINTN)MailBoxBase + i*sizeof (MailBoxBase);
-
- // Clear the mailboxes for the respective cores
- *((UINTN*)(ArmCoreInfoTable[i].MailboxSetAddress)) = 0x0;
- }
- }
- }
- // Flush caches to make sure our pen gets to mem before we free the cores.
- ArmCleanDataCache ();
- }
-
- // By setting address=0 we leave the memory allocation to the function
- Status = PrepareFdt (SystemMemoryBase, Arguments, InitrdImage, InitrdImageSize, &FdtBlobBase, &FdtBlobSize);
- if (EFI_ERROR (Status)) {
- Print (L"ERROR: Can not load Linux kernel with Device Tree. Status=0x%X\n", Status);
- goto EXIT_FREE_FDT;
- }
-
- return StartLinux (LinuxImage, LinuxImageSize, FdtBlobBase, FdtBlobSize);
-
-EXIT_FREE_FDT:
- if (!EFI_ERROR (PenBaseStatus)) {
- gBS->FreePages (PenBase, EFI_SIZE_TO_PAGES (PenSize));
- }
-
- gBS->FreePages (FdtBlobBase, EFI_SIZE_TO_PAGES (FdtBlobSize));
-
-EXIT_FREE_INITRD:
- if (InitrdDevicePath) {
- gBS->FreePages (InitrdImageBase, EFI_SIZE_TO_PAGES (InitrdImageBaseSize));
- }
-
-EXIT_FREE_LINUX:
- gBS->FreePages (LinuxImage, EFI_SIZE_TO_PAGES (LinuxImageSize));
-
- return Status;
-}
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