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audk/ArmPkg/Library/BdsLib/BdsLinuxFdt.c

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/** @file
*
* Copyright (c) 2011-2012, 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/PcdLib.h>
#include <libfdt.h>
#include "BdsInternal.h"
#include "BdsLinuxLoader.h"
#define ALIGN(x, a) (((x) + ((a) - 1)) & ~((a) - 1))
#define PALIGN(p, a) ((void *)(ALIGN((unsigned long)(p), (a))))
#define GET_CELL(p) (p += 4, *((const UINT32 *)(p-4)))
STATIC
UINTN
IsPrintableString (
IN CONST VOID* data,
IN UINTN len
)
{
CONST CHAR8 *s = data;
CONST CHAR8 *ss;
// Zero length is not
if (len == 0) {
return 0;
}
// Must terminate with zero
if (s[len - 1] != '\0') {
return 0;
}
ss = s;
while (*s/* && isprint(*s)*/) {
s++;
}
// Not zero, or not done yet
if (*s != '\0' || (s + 1 - ss) < len) {
return 0;
}
return 1;
}
STATIC
VOID
PrintData (
IN CONST CHAR8* data,
IN UINTN len
)
{
UINTN i;
CONST CHAR8 *p = data;
// No data, don't print
if (len == 0)
return;
if (IsPrintableString (data, len)) {
Print(L" = \"%a\"", (const char *)data);
} else if ((len % 4) == 0) {
Print(L" = <");
for (i = 0; i < len; i += 4) {
Print(L"0x%08x%a", fdt32_to_cpu(GET_CELL(p)),i < (len - 4) ? " " : "");
}
Print(L">");
} else {
Print(L" = [");
for (i = 0; i < len; i++)
Print(L"%02x%a", *p++, i < len - 1 ? " " : "");
Print(L"]");
}
}
VOID
DebugDumpFdt (
IN VOID* FdtBlob
)
{
struct fdt_header *bph;
UINT32 off_dt;
UINT32 off_str;
CONST CHAR8* p_struct;
CONST CHAR8* p_strings;
CONST CHAR8* p;
CONST CHAR8* s;
CONST CHAR8* t;
UINT32 tag;
UINTN sz;
UINTN depth;
UINTN shift;
UINT32 version;
depth = 0;
shift = 4;
bph = FdtBlob;
off_dt = fdt32_to_cpu(bph->off_dt_struct);
off_str = fdt32_to_cpu(bph->off_dt_strings);
p_struct = (CONST CHAR8*)FdtBlob + off_dt;
p_strings = (CONST CHAR8*)FdtBlob + off_str;
version = fdt32_to_cpu(bph->version);
p = p_struct;
while ((tag = fdt32_to_cpu(GET_CELL(p))) != FDT_END) {
if (tag == FDT_BEGIN_NODE) {
s = p;
p = PALIGN(p + AsciiStrLen (s) + 1, 4);
if (*s == '\0')
s = "/";
Print(L"%*s%a {\n", depth * shift, L" ", s);
depth++;
continue;
}
if (tag == FDT_END_NODE) {
depth--;
Print(L"%*s};\n", depth * shift, L" ");
continue;
}
if (tag == FDT_NOP) {
Print(L"%*s// [NOP]\n", depth * shift, L" ");
continue;
}
if (tag != FDT_PROP) {
Print(L"%*s ** Unknown tag 0x%08x\n", depth * shift, L" ", tag);
break;
}
sz = fdt32_to_cpu(GET_CELL(p));
s = p_strings + fdt32_to_cpu(GET_CELL(p));
if (version < 16 && sz >= 8)
p = PALIGN(p, 8);
t = p;
p = PALIGN(p + sz, 4);
Print(L"%*s%a", depth * shift, L" ", s);
PrintData(t, sz);
Print(L";\n");
}
}
typedef struct {
UINTN Base;
UINTN Size;
} FdtRegion;
EFI_STATUS
PrepareFdt (
IN CONST CHAR8* CommandLineArguments,
IN EFI_PHYSICAL_ADDRESS InitrdImage,
IN UINTN InitrdImageSize,
IN OUT EFI_PHYSICAL_ADDRESS *FdtBlobBase,
IN OUT UINT32 *FdtBlobSize
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS NewFdtBlobBase;
UINTN NewFdtBlobSize;
VOID* fdt;
INTN err;
INTN node;
INTN cpu_node;
INTN lenp;
CONST VOID* BootArg;
EFI_PHYSICAL_ADDRESS InitrdImageStart;
EFI_PHYSICAL_ADDRESS InitrdImageEnd;
FdtRegion Region;
UINTN Index;
CHAR8 Name[10];
LIST_ENTRY ResourceList;
BDS_SYSTEM_MEMORY_RESOURCE *Resource;
ARM_PROCESSOR_TABLE *ArmProcessorTable;
ARM_CORE_INFO *ArmCoreInfoTable;
UINT32 MpId;
UINT32 ClusterId;
UINT32 CoreId;
UINT64 CpuReleaseAddr;
err = fdt_check_header ((VOID*)(UINTN)(*FdtBlobBase));
if (err != 0) {
Print (L"ERROR: Device Tree header not valid (err:%d)\n", err);
return EFI_INVALID_PARAMETER;
}
//
// Allocate memory for the new FDT
//
NewFdtBlobSize = fdt_totalsize((VOID*)(UINTN)(*FdtBlobBase)) + FDT_ADDITIONAL_ENTRIES_SIZE;
// Try below a watermark address
Status = EFI_NOT_FOUND;
if (PcdGet32(PcdArmLinuxFdtMaxOffset) != 0) {
NewFdtBlobBase = LINUX_FDT_MAX_OFFSET;
Status = gBS->AllocatePages (AllocateMaxAddress, EfiBootServicesData, EFI_SIZE_TO_PAGES(NewFdtBlobSize), &NewFdtBlobBase);
if (EFI_ERROR(Status)) {
DEBUG ((EFI_D_WARN, "Warning: Failed to load FDT below address 0x%lX (%r). Will try again at a random address anywhere.\n", NewFdtBlobBase, Status));
}
}
// Try anywhere there is available space
if (EFI_ERROR(Status)) {
Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData, EFI_SIZE_TO_PAGES(NewFdtBlobSize), &NewFdtBlobBase);
if (EFI_ERROR(Status)) {
ASSERT_EFI_ERROR(Status);
goto FAIL_NEW_FDT;
} else {
DEBUG ((EFI_D_WARN, "WARNING: Loaded FDT at random address 0x%lX.\nWARNING: There is a risk of accidental overwriting by other code/data.\n", NewFdtBlobBase));
}
}
// Load the Original FDT tree into the new region
fdt = (VOID*)(UINTN)NewFdtBlobBase;
err = fdt_open_into((VOID*)(UINTN)(*FdtBlobBase), fdt, NewFdtBlobSize);
if (err) {
DEBUG((EFI_D_ERROR, "fdt_open_into(): %a\n", fdt_strerror(err)));
Status = EFI_INVALID_PARAMETER;
goto FAIL_NEW_FDT;
}
DEBUG_CODE_BEGIN();
//DebugDumpFdt (fdt);
DEBUG_CODE_END();
node = fdt_subnode_offset(fdt, 0, "chosen");
if (node < 0) {
// The 'chosen' node does not exist, create it
node = fdt_add_subnode(fdt, 0, "chosen");
if (node < 0) {
DEBUG((EFI_D_ERROR,"Error on finding 'chosen' node\n"));
Status = EFI_INVALID_PARAMETER;
goto FAIL_NEW_FDT;
}
}
DEBUG_CODE_BEGIN();
BootArg = fdt_getprop(fdt, node, "bootargs", &lenp);
if (BootArg != NULL) {
DEBUG((EFI_D_ERROR,"BootArg: %a\n",BootArg));
}
DEBUG_CODE_END();
// Set Linux CmdLine
if ((CommandLineArguments != NULL) && (AsciiStrLen (CommandLineArguments) > 0)) {
err = fdt_setprop(fdt, node, "bootargs", CommandLineArguments, AsciiStrSize(CommandLineArguments));
if (err) {
DEBUG((EFI_D_ERROR,"Fail to set new 'bootarg' (err:%d)\n",err));
}
}
// Set Linux Initrd
if (InitrdImageSize != 0) {
InitrdImageStart = cpu_to_fdt64 (InitrdImage);
err = fdt_setprop(fdt, node, "linux,initrd-start", &InitrdImageStart, sizeof(EFI_PHYSICAL_ADDRESS));
if (err) {
DEBUG((EFI_D_ERROR,"Fail to set new 'linux,initrd-start' (err:%d)\n",err));
}
InitrdImageEnd = cpu_to_fdt64 (InitrdImage + InitrdImageSize);
err = fdt_setprop(fdt, node, "linux,initrd-end", &InitrdImageEnd, sizeof(EFI_PHYSICAL_ADDRESS));
if (err) {
DEBUG((EFI_D_ERROR,"Fail to set new 'linux,initrd-start' (err:%d)\n",err));
}
}
// Set Physical memory setup if does not exist
node = fdt_subnode_offset(fdt, 0, "memory");
if (node < 0) {
// The 'memory' node does not exist, create it
node = fdt_add_subnode(fdt, 0, "memory");
if (node >= 0) {
fdt_setprop_string(fdt, node, "name", "memory");
fdt_setprop_string(fdt, node, "device_type", "memory");
GetSystemMemoryResources (&ResourceList);
Resource = (BDS_SYSTEM_MEMORY_RESOURCE*)ResourceList.ForwardLink;
if (sizeof(UINTN) == sizeof(UINT32)) {
Region.Base = cpu_to_fdt32((UINTN)Resource->PhysicalStart);
Region.Size = cpu_to_fdt32((UINTN)Resource->ResourceLength);
} else {
Region.Base = cpu_to_fdt64((UINTN)Resource->PhysicalStart);
Region.Size = cpu_to_fdt64((UINTN)Resource->ResourceLength);
}
err = fdt_setprop(fdt, node, "reg", &Region, sizeof(Region));
if (err) {
DEBUG((EFI_D_ERROR,"Fail to set new 'memory region' (err:%d)\n",err));
}
}
}
// Setup Arm Mpcore Info if it is a multi-core or multi-cluster platforms
for (Index=0; Index < gST->NumberOfTableEntries; Index++) {
// Check for correct GUID type
if (CompareGuid (&gArmMpCoreInfoGuid, &(gST->ConfigurationTable[Index].VendorGuid))) {
MpId = ArmReadMpidr ();
ClusterId = GET_CLUSTER_ID(MpId);
CoreId = GET_CORE_ID(MpId);
node = fdt_subnode_offset(fdt, 0, "cpus");
if (node < 0) {
// Create the /cpus node
node = fdt_add_subnode(fdt, 0, "cpus");
fdt_setprop_string(fdt, node, "name", "cpus");
fdt_setprop_cell(fdt, node, "#address-cells", 1);
fdt_setprop_cell(fdt, node, "#size-cells", 0);
}
// Get pointer to ARM processor table
ArmProcessorTable = (ARM_PROCESSOR_TABLE *)gST->ConfigurationTable[Index].VendorTable;
ArmCoreInfoTable = ArmProcessorTable->ArmCpus;
for (Index = 0; Index < ArmProcessorTable->NumberOfEntries; Index++) {
AsciiSPrint (Name, 10, "cpu@%d", Index);
cpu_node = fdt_subnode_offset(fdt, node, Name);
if (cpu_node < 0) {
cpu_node = fdt_add_subnode(fdt, node, Name);
fdt_setprop_string(fdt, cpu_node, "device-type", "cpu");
fdt_setprop(fdt, cpu_node, "reg", &Index, sizeof(Index));
}
fdt_setprop_string(fdt, cpu_node, "enable-method", "spin-table");
CpuReleaseAddr = cpu_to_fdt64(ArmCoreInfoTable[Index].MailboxSetAddress);
fdt_setprop(fdt, cpu_node, "cpu-release-addr", &CpuReleaseAddr, sizeof(CpuReleaseAddr));
// If it is not the primary core than the cpu should be disabled
if (((ArmCoreInfoTable[Index].ClusterId != ClusterId) || (ArmCoreInfoTable[Index].CoreId != CoreId))) {
fdt_setprop_string(fdt, cpu_node, "status", "disabled");
}
}
break;
}
}
DEBUG_CODE_BEGIN();
//DebugDumpFdt (fdt);
DEBUG_CODE_END();
*FdtBlobBase = NewFdtBlobBase;
*FdtBlobSize = (UINTN)fdt_totalsize ((VOID*)(UINTN)(NewFdtBlobBase));
return EFI_SUCCESS;
FAIL_NEW_FDT:
*FdtBlobSize = (UINTN)fdt_totalsize ((VOID*)(UINTN)(*FdtBlobBase));
// Return success even if we failed to update the FDT blob. The original one is still valid.
return EFI_SUCCESS;
}
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