Kernel - Added a (slightly hacky) virtual PCI interface

[tpg/acess2.git] / KernelLand / Kernel / arch / x86 / mboot.c

diff --git a/KernelLand/Kernel/arch/x86/mboot.c b/KernelLand/Kernel/arch/x86/mboot.c
index 5fe4068..897c9bb 100644 (file)
--- a/KernelLand/Kernel/arch/x86/mboot.c
+++ b/KernelLand/Kernel/arch/x86/mboot.c
@@ -5,7 +5,7 @@
  * mboot.c
  * - Multiboot Support
  */
-#define DEBUG  0
+#define DEBUG  1
 #include <acess.h>
 #include <mboot.h>
 
@@ -19,26 +19,52 @@ int Multiboot_LoadMemoryMap(tMBoot_Info *MBInfo, tVAddr MapOffset, tPMemMapEnt *
        ENTER("pMBInfo pMapOffset pMap iMapSize PKStart PKEnd",
                MBInfo, MapOffset, Map, MapSize, KStart, KEnd);
 
-       // Build up memory map
-       nPMemMapEnts = 0;
-       while( ent < last && nPMemMapEnts < MapSize )
+       // Check that the memory map is present
+       if( MBInfo->Flags & (1 << 6) )
        {
-               tPMemMapEnt     *nent = &Map[nPMemMapEnts];
-               nent->Start = ent->Base;
-               nent->Length = ent->Length;
-               switch(ent->Type)
+               // Build up memory map
+               nPMemMapEnts = 0;
+               while( ent < last && nPMemMapEnts < MapSize )
                {
-               case 1:
-                       nent->Type = PMEMTYPE_FREE;
-                       break;
-               default:
-                       nent->Type = PMEMTYPE_RESERVED;
-                       break;
+                       tPMemMapEnt     *nent = &Map[nPMemMapEnts];
+                       if( !MM_GetPhysAddr(ent) )
+                               Log_KernelPanic("MBoot", "MBoot Map entry %i addres bad (%p)",
+                                       nPMemMapEnts, ent);
+       
+                       nent->Start = ent->Base;
+                       nent->Length = ent->Length;
+                       switch(ent->Type)
+                       {
+                       case 1:
+                               nent->Type = PMEMTYPE_FREE;
+                               break;
+                       default:
+                               nent->Type = PMEMTYPE_RESERVED;
+                               break;
+                       }
+                       nent->NUMADomain = 0;
+                       
+                       nPMemMapEnts ++;
+                       ent = (void*)( (tVAddr)ent + ent->Size + 4 );
                }
-               nent->NUMADomain = 0;
-               
-               nPMemMapEnts ++;
-               ent = (void*)( (tVAddr)ent + ent->Size + 4 );
+       }
+       else if( MBInfo->Flags & (1 << 0) )
+       {
+               Log_Warning("MBoot", "No memory map passed, using mem_lower and mem_upper");
+               nPMemMapEnts = 2;
+               Map[0].Start = 0;
+               Map[0].Length = MBInfo->LowMem * 1024;
+               Map[0].Type = PMEMTYPE_FREE;
+               Map[0].NUMADomain = 0;
+
+               Map[1].Start = 0x100000;
+               Map[1].Length = MBInfo->HighMem * 1024;
+               Map[1].Type = PMEMTYPE_FREE;
+               Map[1].NUMADomain = 0;
+       }
+       else
+       {
+               Log_KernelPanic("MBoot", "Multiboot didn't pass memory information");
        }
 
        // Ensure it's valid
@@ -51,19 +77,28 @@ int Multiboot_LoadMemoryMap(tMBoot_Info *MBInfo, tVAddr MapOffset, tPMemMapEnt *
                KStart, KEnd - KStart
                );
 
-       // Replace modules with PMEMTYPE_USED
-       nPMemMapEnts = PMemMap_MarkRangeUsed(Map, nPMemMapEnts, MapSize,
-               MBInfo->Modules, MBInfo->ModuleCount*sizeof(tMBoot_Module)
-               );
-       tMBoot_Module *mods = (void*)( (tVAddr)MBInfo->Modules + MapOffset);
-       for( int i = 0; i < MBInfo->ModuleCount; i ++ )
+       PMemMap_DumpBlocks(Map, nPMemMapEnts);
+
+       // Check if boot modules were passed
+       if( MBInfo->Flags & (1 << 3) )
        {
-               nPMemMapEnts = PMemMap_MarkRangeUsed(
-                       Map, nPMemMapEnts, MapSize,
-                       mods->Start, mods->End - mods->Start
+               // Replace modules with PMEMTYPE_USED
+               nPMemMapEnts = PMemMap_MarkRangeUsed(Map, nPMemMapEnts, MapSize,
+                       MBInfo->Modules, MBInfo->ModuleCount*sizeof(tMBoot_Module)
                        );
+               LOG("MBInfo->Modules = %x", MBInfo->Modules);
+               tMBoot_Module *mods = (void*)( (tVAddr)MBInfo->Modules + MapOffset);
+               for( int i = 0; i < MBInfo->ModuleCount; i ++ )
+               {
+                       LOG("&mods[%i] = %p", i, &mods[i]);
+                       LOG("mods[i] = {0x%x -> 0x%x}", mods[i].Start, mods[i].End);
+                       nPMemMapEnts = PMemMap_MarkRangeUsed(
+                               Map, nPMemMapEnts, MapSize,
+                               mods[i].Start, mods[i].End - mods[i].Start
+                               );
+               }
        }
-       
+               
        // Debug - Output map
        PMemMap_DumpBlocks(Map, nPMemMapEnts);
 
@@ -73,6 +108,12 @@ int Multiboot_LoadMemoryMap(tMBoot_Info *MBInfo, tVAddr MapOffset, tPMemMapEnt *
 
 tBootModule *Multiboot_LoadModules(tMBoot_Info *MBInfo, tVAddr MapOffset, int *ModuleCount)
 {
+       if( !(MBInfo->Flags & (1 << 3)) ) {
+               *ModuleCount = 0;
+               Log_Log("Arch", "No multiboot module information passed");
+               return NULL;
+       }
+
        tMBoot_Module   *mods = (void*)( MBInfo->Modules + MapOffset );
        *ModuleCount = MBInfo->ModuleCount;
        tBootModule *ret = malloc( MBInfo->ModuleCount * sizeof(*ret) );