reactos/boot/armllb/os/loader.c

   1 /*
   2  * PROJECT:         ReactOS Boot Loader
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            boot/armllb/os/loader.c
   5  * PURPOSE:         OS Loader Code for LLB
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8
   9 #include "precomp.h"
  10
  11 BIOS_MEMORY_MAP MemoryMap[32];
  12 ARM_BOARD_CONFIGURATION_BLOCK ArmBlock;
  13 POSLOADER_INIT LoaderInit;
  14
  15 VOID
  16 NTAPI
  17 LlbAllocateMemoryEntry(IN BIOS_MEMORY_TYPE Type,
  18                       IN ULONG BaseAddress,
  19                       IN ULONG Length)
  20 {
  21     PBIOS_MEMORY_MAP Entry;
  22
  23     /* Get the next memory entry */
  24     Entry = MemoryMap;
  25     while (Entry->Length) Entry++;
  26
  27     /* Fill it out */
  28     Entry->Length = Length;
  29     Entry->BaseAddress = BaseAddress;
  30     Entry->Type = Type;
  31
  32     /* Block count */
  33     ArmBlock.MemoryMapEntryCount++;
  34 }
  35
  36 VOID
  37 NTAPI
  38 LlbSetCommandLine(IN PCHAR CommandLine)
  39 {
  40     /* Copy the command line in the ARM block */
  41     strcpy(ArmBlock.CommandLine, CommandLine);
  42 }
  43
  44 VOID
  45 NTAPI
  46 LlbBuildArmBlock(VOID)
  47 {
  48     /* Write version number */
  49     ArmBlock.MajorVersion = ARM_BOARD_CONFIGURATION_MAJOR_VERSION;
  50     ArmBlock.MinorVersion = ARM_BOARD_CONFIGURATION_MINOR_VERSION;
  51
  52     /* Get arch type */
  53     ArmBlock.BoardType = LlbHwGetBoardType();
  54
  55     /* Get peripheral clock rate */
  56     ArmBlock.ClockRate = LlbHwGetPClk();
  57
  58     /* Get timer and serial port base addresses */
  59     ArmBlock.TimerRegisterBase = LlbHwGetTmr0Base();
  60     ArmBlock.UartRegisterBase = LlbHwGetUartBase(LlbHwGetSerialUart());
  61
  62     /* Debug */
  63     DbgPrint("Machine Identifier: %lx\nPCLK: %d\nTIMER 0: %p\nSERIAL UART: %p\n",
  64              ArmBlock.BoardType,
  65              ArmBlock.ClockRate,
  66              ArmBlock.TimerRegisterBase,
  67              ArmBlock.UartRegisterBase);
  68
  69     /* Now load the memory map */
  70     ArmBlock.MemoryMap = MemoryMap;
  71
  72     /* Write firmware callbacks */
  73     ArmBlock.ConsPutChar = LlbFwPutChar;
  74     ArmBlock.ConsKbHit = LlbFwKbHit;
  75     ArmBlock.ConsGetCh = LlbFwGetCh;
  76 }
  77
  78 VOID
  79 NTAPI
  80 LlbBuildMemoryMap(VOID)
  81 {
  82     ULONG Base, Size;
  83
  84     /* Zero out the memory map */
  85     memset(MemoryMap, 0, sizeof(MemoryMap));
  86
  87     /* Query memory information */
  88     LlbEnvGetMemoryInformation(&Base, &Size);
  89     LlbAllocateMemoryEntry(BiosMemoryUsable, Base, Size);
  90
  91     /* Call the hardware-specific function for hardware-defined regions */
  92     LlbHwBuildMemoryMap(MemoryMap);
  93 }
  94
  95 VOID
  96 NTAPI
  97 LlbLoadOsLoader(VOID)
  98 {
  99     PCHAR BootDevice;
 100
 101     /* Read the current boot device */
 102     BootDevice = LlbEnvRead("boot-device");
 103     printf("Loading OS Loader from: %s...\n", BootDevice);
 104     if (!strcmp(BootDevice, "NAND"))
 105     {
 106         // todo
 107     }
 108     else if (!strcmp(BootDevice, "RAMDISK"))
 109     {
 110         /* Call the hardware-specific function */
 111         LoaderInit = LlbHwLoadOsLoaderFromRam();
 112     }
 113     else if (!strcmp(BootDevice, "MMC") ||
 114              !strcmp(BootDevice, "SD"))
 115     {
 116         //todo
 117     }
 118     else if (!strcmp(BootDevice, "HDD"))
 119     {
 120         //todo
 121     }
 122     printf("OS Loader loaded at 0x%p...JUMP!\n\n\n\n\n", LoaderInit);
 123 }
 124
 125 VOID
 126 NTAPI
 127 LlbBoot(VOID)
 128 {
 129     /* Setup the ARM block */
 130     LlbBuildArmBlock();
 131
 132     /* Build the memory map */
 133     LlbBuildMemoryMap();
 134
 135     /* Load the OS loader */
 136     LlbLoadOsLoader();
 137
 138     /* Jump to the OS Loader (FreeLDR in this case) */
 139     LoaderInit(&ArmBlock);
 140 }
 141
 142 /* EOF */