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ArmPkg/BdsLib: Use two distinct functions to boot Linux either by Atag or Fdt

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Separate the BdsBootLinux() function into two functions for Atag and Fdt specific Linux booting
- BdsBootLinuxAtag ()
- BdsBootLinuxFdt ()



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12408 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-09-22 22:54:38 +00:00
parent 11c20f4e06
commit 76d17c3156
5 changed files with 160 additions and 96 deletions
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222
ArmPkg/Library/BdsLib/BdsLinuxLoader.c
View File

@@ -13,17 +13,9 @@
**/
#include "BdsInternal.h"
#include "BdsLinuxLoader.h"
#include <Library/PcdLib.h>
#include <Library/ArmLib.h>
#include <Library/HobLib.h>
#define ALIGN32_BELOW(addr) ALIGN_POINTER(addr - 32,32)
#define LINUX_ATAG_MAX_OFFSET (PcdGet32(PcdSystemMemoryBase) + PcdGet32(PcdArmLinuxAtagMaxOffset))
#define LINUX_KERNEL_MAX_OFFSET (PcdGet32(PcdSystemMemoryBase) + PcdGet32(PcdArmLinuxKernelMaxOffset))
// Point to the current ATAG
STATIC LINUX_ATAG *mLinuxKernelCurrentAtag;
@@ -178,7 +170,7 @@ PreparePlatformHardware (
{
//Note: Interrupts will be disabled by the GIC driver when ExitBootServices() will be called.
// clean, invalidate, disable data cache
// Clean, invalidate, disable data cache
ArmCleanInvalidateDataCache();
ArmDisableDataCache();
@@ -186,97 +178,24 @@ PreparePlatformHardware (
ArmInvalidateInstructionCache ();
ArmDisableInstructionCache ();
// turn off MMU
// Turn off MMU
ArmDisableMmu();
return EFI_SUCCESS;
}
/**
Start a Linux kernel from a Device Path
@param LinuxKernel Device Path to the Linux Kernel
@param Parameters Linux kernel agruments
@param Fdt Device Path to the Flat Device Tree
@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.
**/
STATIC
EFI_STATUS
BdsBootLinux (
IN EFI_DEVICE_PATH_PROTOCOL* LinuxKernelDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL* InitrdDevicePath,
IN CONST CHAR8* Arguments,
IN EFI_DEVICE_PATH_PROTOCOL* FdtDevicePath
StartLinux (
IN EFI_PHYSICAL_ADDRESS LinuxImage,
IN UINTN LinuxImageSize,
IN EFI_PHYSICAL_ADDRESS KernelParamsAddress,
IN UINTN KernelParamsSize,
IN UINT32 MachineType
)
{
EFI_STATUS Status;
UINT32 LinuxImageSize;
UINT32 InitrdImageSize;
UINT32 KernelParamsSize;
EFI_PHYSICAL_ADDRESS KernelParamsAddress;
UINT32 MachineType;
BOOLEAN FdtSupported;
LINUX_KERNEL LinuxKernel;
EFI_PHYSICAL_ADDRESS LinuxImage;
EFI_PHYSICAL_ADDRESS InitrdImage;
InitrdImageSize = 0;
FdtSupported = FALSE;
// Ensure the System Memory PCDs have been initialized (PcdSystemMemoryBase and PcdSystemMemorySize)
ASSERT (PcdGet32(PcdSystemMemorySize) != 0);
PERF_START (NULL, "BDS", NULL, 0);
// Load the Linux kernel from a device path
LinuxImage = LINUX_KERNEL_MAX_OFFSET;
Status = BdsLoadImage (LinuxKernelDevicePath, AllocateMaxAddress, &LinuxImage, &LinuxImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find Linux kernel.\n");
return Status;
}
LinuxKernel = (LINUX_KERNEL)(UINTN)LinuxImage;
if (InitrdDevicePath) {
Status = BdsLoadImage (InitrdDevicePath, AllocateAnyPages, &InitrdImage, &InitrdImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find initrd image.\n");
return Status;
}
}
if (FdtDevicePath) {
// Load the FDT binary from a device path
KernelParamsAddress = LINUX_ATAG_MAX_OFFSET;
Status = BdsLoadImage (FdtDevicePath, AllocateMaxAddress, &KernelParamsAddress, &KernelParamsSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find Device Tree blob.\n");
return Status;
}
FdtSupported = TRUE;
}
//
// Setup the Linux Kernel Parameters
//
if (!FdtSupported) {
// Non-FDT requires a specific machine type.
// This OS Boot loader supports just one machine type,
// but that could change in the future.
MachineType = PcdGet32(PcdArmMachineType);
// By setting address=0 we leave the memory allocation to the function
Status = PrepareAtagList (Arguments, InitrdImage, InitrdImageSize, (LINUX_ATAG**)&KernelParamsAddress, &KernelParamsSize);
if(EFI_ERROR(Status)) {
Print(L"ERROR: Can not prepare ATAG list. Status=0x%X\n", Status);
goto Exit;
}
} else {
MachineType = 0xFFFFFFFF;
}
// 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.
@@ -298,6 +217,8 @@ BdsBootLinux (
if ((UINTN)LinuxImage > LINUX_KERNEL_MAX_OFFSET) {
//Note: There is no requirement on the alignment
LinuxKernel = (LINUX_KERNEL)CopyMem (ALIGN32_BELOW(LINUX_KERNEL_MAX_OFFSET - LinuxImageSize), (VOID*)(UINTN)LinuxImage, LinuxImageSize);
} else {
LinuxKernel = (LINUX_KERNEL)(UINTN)LinuxImage;
}
//TODO: Check there is no overlapping between kernel and Atag
@@ -322,7 +243,7 @@ BdsBootLinux (
DEBUG((EFI_D_ERROR, "\nStarting the kernel:\n\n"));
// jump to kernel with register set
LinuxKernel ((UINTN)0, (UINTN)MachineType, (UINTN)KernelParamsAddress);
LinuxKernel ((UINTN)0, MachineType, (UINTN)KernelParamsAddress);
// Kernel should never exit
// After Life services are not provided
@@ -335,3 +256,122 @@ Exit:
// Free Runtimee Memory (kernel and FDT)
return Status;
}
/**
Start a Linux kernel from a Device Path
@param LinuxKernel Device Path to the Linux Kernel
@param Parameters Linux kernel agruments
@param Fdt Device Path to the Flat Device Tree
@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
BdsBootLinuxAtag (
IN EFI_DEVICE_PATH_PROTOCOL* LinuxKernelDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL* InitrdDevicePath,
IN CONST CHAR8* Arguments
)
{
EFI_STATUS Status;
UINT32 LinuxImageSize;
UINT32 InitrdImageSize = 0;
UINT32 KernelParamsSize;
EFI_PHYSICAL_ADDRESS KernelParamsAddress;
EFI_PHYSICAL_ADDRESS LinuxImage;
EFI_PHYSICAL_ADDRESS InitrdImage;
PERF_START (NULL, "BDS", NULL, 0);
// Load the Linux kernel from a device path
LinuxImage = LINUX_KERNEL_MAX_OFFSET;
Status = BdsLoadImage (LinuxKernelDevicePath, AllocateMaxAddress, &LinuxImage, &LinuxImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find Linux kernel.\n");
return Status;
}
if (InitrdDevicePath) {
Status = BdsLoadImage (InitrdDevicePath, AllocateAnyPages, &InitrdImage, &InitrdImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find initrd image.\n");
return Status;
}
}
//
// Setup the Linux Kernel Parameters
//
// By setting address=0 we leave the memory allocation to the function
Status = PrepareAtagList (Arguments, InitrdImage, InitrdImageSize, (LINUX_ATAG**)&KernelParamsAddress, &KernelParamsSize);
if (EFI_ERROR(Status)) {
Print(L"ERROR: Can not prepare ATAG list. Status=0x%X\n", Status);
return Status;
}
return StartLinux (LinuxImage, LinuxImageSize, KernelParamsAddress, KernelParamsSize, PcdGet32(PcdArmMachineType));
}
/**
Start a Linux kernel from a Device Path
@param LinuxKernel Device Path to the Linux Kernel
@param Parameters Linux kernel agruments
@param Fdt Device Path to the Flat Device Tree
@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
BdsBootLinuxFdt (
IN EFI_DEVICE_PATH_PROTOCOL* LinuxKernelDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL* InitrdDevicePath,
IN CONST CHAR8* Arguments,
IN EFI_DEVICE_PATH_PROTOCOL* FdtDevicePath
)
{
EFI_STATUS Status;
UINT32 LinuxImageSize;
UINT32 InitrdImageSize = 0;
UINT32 KernelParamsSize;
EFI_PHYSICAL_ADDRESS KernelParamsAddress;
UINT32 FdtMachineType;
EFI_PHYSICAL_ADDRESS LinuxImage;
EFI_PHYSICAL_ADDRESS InitrdImage;
FdtMachineType = 0xFFFFFFFF;
PERF_START (NULL, "BDS", NULL, 0);
// Load the Linux kernel from a device path
LinuxImage = LINUX_KERNEL_MAX_OFFSET;
Status = BdsLoadImage (LinuxKernelDevicePath, AllocateMaxAddress, &LinuxImage, &LinuxImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find Linux kernel.\n");
return Status;
}
if (InitrdDevicePath) {
Status = BdsLoadImage (InitrdDevicePath, AllocateAnyPages, &InitrdImage, &InitrdImageSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find initrd image.\n");
return Status;
}
}
// Load the FDT binary from a device path
KernelParamsAddress = LINUX_ATAG_MAX_OFFSET;
Status = BdsLoadImage (FdtDevicePath, AllocateMaxAddress, &KernelParamsAddress, &KernelParamsSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find Device Tree blob.\n");
return Status;
}
return StartLinux (LinuxImage, LinuxImageSize, KernelParamsAddress, KernelParamsSize, FdtMachineType);
}