FDT stuff, very dirty

halal-beef · Jul 19, 2024 · ffe8fe1 · ffe8fe1
1 parent 4fb1aed
commit ffe8fe1
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Showing 22 changed files with 6,233 additions and 4 deletions.
diff --git a/BootShim/AARCH64/BootShim.S b/BootShim/AARCH64/BootShim.S
@@ -15,6 +15,8 @@ _StackSize:
   .long 0               /* Reserved */
 
 _Start:
+  mov x10, (UEFI_BASE + UEFI_SIZE)
+  str x0, [x10]
   mov   x4, x1
   ldr   x5, _StackBase
   cmp   x4, x5

diff --git a/Platforms/Samsung/x1sPkg/Library/DeviceMemoryMapLib/DeviceMemoryMapLib.c b/Platforms/Samsung/x1sPkg/Library/DeviceMemoryMapLib/DeviceMemoryMapLib.c
@@ -11,8 +11,9 @@ gDeviceMemoryDescriptorEx[] = {
   {"UEFI Stack",         0x80002000, 0x00040000, AddMem, SYS_MEM, SYS_MEM_CAP, BsData, WRITE_BACK},
   {"RAM Partition",      0x80042000, 0x11FBE000, AddMem, SYS_MEM, SYS_MEM_CAP, Conv,   WRITE_BACK},
   {"UEFI FD",            0x92000000, 0x00200000, AddMem, SYS_MEM, SYS_MEM_CAP, BsData, WRITE_BACK},
-  {"DXE Heap",           0x92200000, 0x03C00000, AddMem, SYS_MEM, SYS_MEM_CAP, Conv,   WRITE_BACK},
-  {"RAM Partition",      0x95E00000, 0x24D00000, AddMem, SYS_MEM, SYS_MEM_CAP, Conv,   WRITE_BACK},
+  {"FDT",                0x92200000, 0x00001000, AddMem, MEM_RES, SYS_MEM_CAP, Reserv, UNCACHED_UNBUFFERED},
+  {"DXE Heap",           0x92201000, 0x03C00000, AddMem, SYS_MEM, SYS_MEM_CAP, Conv,   WRITE_BACK},
+  {"RAM Partition",      0x95E01000, 0x24CFF000, AddMem, SYS_MEM, SYS_MEM_CAP, Conv,   WRITE_BACK},
 
   // Memory Hole: 0xBAB00000 -> 0xC1200000 (0x6700000)
 

diff --git a/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/DevicePrePiLib.c b/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/DevicePrePiLib.c
@@ -1,4 +1,32 @@
 #include <Library/DevicePrePiLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+
+#include "libfdt.h"
 
 VOID
-DeviceInitialize () {}
+DeviceInitialize ()
+{
+  UINT32 fdtBase = MmioRead32(0x92200000);
+
+  DEBUG((EFI_D_WARN, "\n\n\n\nFDT Base: 0x%x\n", fdtBase));
+DEBUG((EFI_D_ERROR, "\n\n\n\nFDT Base: 0x%x\n", fdtBase));
+
+  UINT32 fdt = MmioRead32(0x8A080000);
+  DEBUG((EFI_D_WARN, "FDT MAGIC: 0x%x\n", fdt));
+
+  CONST VOID *fdtP = (CONST VOID *)(0x8A080000);
+
+  if (fdt_check_header(fdtP) == 0) DEBUG((EFI_D_WARN, "ITS AN FDT JIM\n"));
+
+  INT32 offset = 0;
+
+      while ((offset = fdt_next_node(fdtP, offset, NULL)) >= 0) {
+const char *node_name = fdt_get_name(fdtP, offset, NULL);
+DEBUG((EFI_D_WARN, "Node: %s\n", node_name));
+  }
+
+//  if(FdtCheckHeader (fdt) == 0) DEBUG((EFI_D_WARN, "ITS AN FDT JIM\n"));
+
+  while(TRUE){}
+}
diff --git a/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/DevicePrePiLib.inf b/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/DevicePrePiLib.inf
@@ -8,7 +8,26 @@
 
 [Sources]
   DevicePrePiLib.c
+  fdt.c
+  fdt_addresses.c
+  fdt_check.c
+  fdt_empty_tree.c
+  fdt_overlay.c
+  fdt_ro.c
+  fdt_rw.c
+  fdt_strerror.c
+  fdt_sw.c
+  fdt_strfuncs.c
+  fdt_wip.c
+  fdt.h
+  libfdt.h
+  libfdt_env.h
+  libfdt_internal.h
 
 [Packages]
   MdePkg/MdePkg.dec
   SiliciumPkg/SiliciumPkg.dec
+
+[LibraryClasses]
+  IoLib
+  DebugLib
diff --git a/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/TODO b/Platforms/Samsung/x1sPkg/Library/DevicePrePiLib/TODO
@@ -0,0 +1,3 @@
+- Tree traversal functions
+- Graft function
+- Complete libfdt.h documenting comments