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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 <Base.h>
#include <Uefi.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BdsLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/PrintLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Protocol/DevicePathFromText.h>
#include <Guid/GlobalVariable.h>
#include <libfdt.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_t *)(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
DumpFdt (
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 + strlen(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");
}
}
EFI_STATUS
EblDumpFdt (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH* FdtDevicePath;
EFI_PHYSICAL_ADDRESS FdtBlob;
UINTN FdtBlobSize;
UINTN Ret;
EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;
// If no FDT file is passed to the argument then get the one from the platform
if (Argc < 2) {
Status = GetEnvironmentVariable (L"Fdt",NULL,NULL,(VOID**)&FdtDevicePath);
if (Status == EFI_NOT_FOUND) {
// No set yet, get the Default Device Path
Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);
ASSERT_EFI_ERROR(Status);
FdtDevicePath = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath ((CHAR16*)PcdGetPtr(PcdFdtDevicePath));
}
} else {
return EFI_NOT_FOUND;
}
Status = BdsLoadImage (FdtDevicePath, AllocateAnyPages, &FdtBlob, &FdtBlobSize);
if (EFI_ERROR(Status)) {
Print (L"ERROR: Did not find the Fdt Blob.\n");
return Status;
}
Ret = fdt_check_header((CONST VOID*)(UINTN)FdtBlob);
if (Ret != 0) {
Print (L"ERROR: Device Tree header not valid (err:%d)\n",Ret);
return Status;
}
DumpFdt ((VOID*)(UINTN)FdtBlob);
FreePool (FdtDevicePath);
return EFI_SUCCESS;
}
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