8 #include <multiboot2.h>
15 #define MAX_ARGSTR_POS (0x400000-0x2000)
18 extern void Heap_Install(void);
19 extern void Desctab_Install(void);
20 extern void MM_PreinitVirtual(void);
21 extern void MM_Install(tMBoot_Info *MBoot);
22 extern void MM_InstallVirtual(void);
23 extern void Threads_Init(void);
24 extern int Time_Setup(void);
26 extern void System_Init(char *Commandline);
29 int kmain(Uint MbMagic, void *MbInfoPtr);
32 char *gsBootCmdLine = NULL;
38 } *gaArch_BootModules;
39 int giArch_NumBootModules = 0;
42 int kmain(Uint MbMagic, void *MbInfoPtr)
48 Log("MbMagic = %08x", MbMagic);
49 Log("MbInfoPtr = %p", MbInfoPtr);
51 // Set up non-boot info dependent stuff
52 Desctab_Install(); // Set up GDT and IDT
53 MM_PreinitVirtual(); // Initialise virtual mappings
59 // Adjust Multiboot structure address
60 mbInfo = (void*)( (Uint)MbInfoPtr + KERNEL_BASE );
61 gsBootCmdLine = (char*)(mbInfo->CommandLine + KERNEL_BASE);
63 MM_Install( mbInfo ); // Set up physical memory manager
67 case MULTIBOOT2_MAGIC:
68 Panic("Multiboot 2 not yet supported");
69 //MM_InstallMBoot2( MbInfo ); // Set up physical memory manager
74 Panic("Multiboot magic invalid %08x, expected %08x or %08x\n",
75 MbMagic, MULTIBOOT_MAGIC, MULTIBOOT2_MAGIC);
79 MM_InstallVirtual(); // Clean up virtual address space
80 Heap_Install(); // Create initial heap
82 //Log_Log("Arch", "Starting Multitasking...");
89 Log_Log("Arch", "Starting VFS...");
90 // Load Virtual Filesystem
93 // Load initial modules
94 mods = (void*)( mbInfo->Modules + KERNEL_BASE );
95 giArch_NumBootModules = mbInfo->ModuleCount;
96 gaArch_BootModules = malloc( giArch_NumBootModules * sizeof(*gaArch_BootModules) );
97 for( i = 0; i < mbInfo->ModuleCount; i ++ )
101 Log_Log("Arch", "Multiboot Module at 0x%08x, 0x%08x bytes (String at 0x%08x)",
102 mods[i].Start, mods[i].End-mods[i].Start, mods[i].String);
104 gaArch_BootModules[i].PBase = mods[i].Start;
105 gaArch_BootModules[i].Size = mods[i].End - mods[i].Start;
107 // Always HW map the module data
108 ofs = mods[i].Start&0xFFF;
109 gaArch_BootModules[i].Base = (void*)( MM_MapHWPages(mods[i].Start,
110 (gaArch_BootModules[i].Size+ofs+0xFFF) / 0x1000
113 // Only map the string if needed
114 if( (tVAddr)mods[i].String > MAX_ARGSTR_POS )
116 // Assumes the string is < 4096 bytes long)
117 gaArch_BootModules[i].ArgString = (void*)(
118 MM_MapHWPages(mods[i].String, 2) + (mods[i].String&0xFFF)
122 gaArch_BootModules[i].ArgString = (char *)mods[i].String + KERNEL_BASE;
125 // Pass on to Independent Loader
126 Log_Log("Arch", "Starting system");
127 System_Init(gsBootCmdLine);
129 // Sleep forever (sleeping beauty)
135 void Arch_LoadBootModules(void)
138 for( i = 0; i < giArch_NumBootModules; i ++ )
140 Log_Log("Arch", "Loading '%s'", gaArch_BootModules[i].ArgString);
142 if( !Module_LoadMem( gaArch_BootModules[i].Base, gaArch_BootModules[i].Size, gaArch_BootModules[i].ArgString ) )
144 Log_Warning("Arch", "Unable to load module");
148 numPages = (gaArch_BootModules[i].Size + ((Uint)gaArch_BootModules[i].Base&0xFFF) + 0xFFF) >> 12;
149 MM_UnmapHWPages( (tVAddr)gaArch_BootModules[i].Base, numPages );
151 for( j = 0; j < numPages; j++ )
152 MM_DerefPhys( gaArch_BootModules[i].PBase + (j << 12) );
154 if( (tVAddr) gaArch_BootModules[i].ArgString > MAX_ARGSTR_POS )
155 MM_UnmapHWPages( (tVAddr)gaArch_BootModules[i].ArgString, 2 );
157 Log_Log("Arch", "Boot modules loaded");
158 free( gaArch_BootModules );