mirror of
https://github.com/reactos/reactos.git
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141 lines
3.4 KiB
C
Executable file
141 lines
3.4 KiB
C
Executable file
/*
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* PROJECT: ReactOS Boot Loader
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: boot/armllb/os/loader.c
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* PURPOSE: OS Loader Code for LLB
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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#include "precomp.h"
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BIOS_MEMORY_MAP MemoryMap[32];
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ARM_BOARD_CONFIGURATION_BLOCK ArmBlock;
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POSLOADER_INIT LoaderInit;
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VOID
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NTAPI
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LlbAllocateMemoryEntry(IN BIOS_MEMORY_TYPE Type,
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IN ULONG BaseAddress,
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IN ULONG Length)
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{
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PBIOS_MEMORY_MAP Entry;
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/* Get the next memory entry */
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Entry = MemoryMap;
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while (Entry->Length) Entry++;
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/* Fill it out */
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Entry->Length = Length;
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Entry->BaseAddress = BaseAddress;
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Entry->Type = Type;
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/* Block count */
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ArmBlock.MemoryMapEntryCount++;
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}
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VOID
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NTAPI
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LlbSetCommandLine(IN PCHAR CommandLine)
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{
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/* Copy the command line in the ARM block */
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strcpy(ArmBlock.CommandLine, CommandLine);
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}
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VOID
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NTAPI
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LlbBuildArmBlock(VOID)
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{
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/* Write version number */
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ArmBlock.MajorVersion = ARM_BOARD_CONFIGURATION_MAJOR_VERSION;
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ArmBlock.MinorVersion = ARM_BOARD_CONFIGURATION_MINOR_VERSION;
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/* Get arch type */
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ArmBlock.BoardType = LlbHwGetBoardType();
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/* Get peripheral clock rate */
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ArmBlock.ClockRate = LlbHwGetPClk();
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/* Get timer and serial port base addresses */
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ArmBlock.TimerRegisterBase = LlbHwGetTmr0Base();
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ArmBlock.UartRegisterBase = LlbHwGetUartBase(LlbHwGetSerialUart());
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/* Debug */
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DbgPrint("Machine Identifier: %lx\nPCLK: %d\nTIMER 0: %p\nSERIAL UART: %p\n",
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ArmBlock.BoardType,
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ArmBlock.ClockRate,
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ArmBlock.TimerRegisterBase,
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ArmBlock.UartRegisterBase);
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/* Now load the memory map */
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ArmBlock.MemoryMap = MemoryMap;
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/* Write firmware callbacks */
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ArmBlock.ConsPutChar = LlbFwPutChar;
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ArmBlock.ConsKbHit = LlbFwKbHit;
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ArmBlock.ConsGetCh = LlbFwGetCh;
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ArmBlock.VideoClearScreen = LlbFwVideoClearScreen;
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ArmBlock.VideoSetDisplayMode = LlbFwVideoSetDisplayMode;
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ArmBlock.VideoGetDisplaySize = LlbFwVideoGetDisplaySize;
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ArmBlock.VideoPutChar = LlbFwVideoPutChar;
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ArmBlock.GetTime = LlbFwGetTime;
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}
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VOID
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NTAPI
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LlbBuildMemoryMap(VOID)
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{
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/* Zero out the memory map */
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memset(MemoryMap, 0, sizeof(MemoryMap));
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/* Call the hardware-specific function for hardware-defined regions */
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LlbHwBuildMemoryMap(MemoryMap);
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}
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VOID
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NTAPI
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LlbLoadOsLoader(VOID)
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{
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PCHAR BootDevice;
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/* Read the current boot device */
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BootDevice = LlbEnvRead("boot-device");
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printf("Loading OS Loader from: %s...\n", BootDevice);
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if (!strcmp(BootDevice, "NAND"))
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{
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// todo
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}
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else if (!strcmp(BootDevice, "RAMDISK"))
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{
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/* Call the hardware-specific function */
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LoaderInit = LlbHwLoadOsLoaderFromRam();
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}
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else if (!strcmp(BootDevice, "MMC") ||
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!strcmp(BootDevice, "SD"))
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{
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//todo
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}
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else if (!strcmp(BootDevice, "HDD"))
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{
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//todo
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}
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printf("OS Loader loaded at 0x%p...JUMP!\n\n\n\n\n", LoaderInit);
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}
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VOID
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NTAPI
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LlbBoot(VOID)
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{
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/* Setup the ARM block */
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LlbBuildArmBlock();
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/* Build the memory map */
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LlbBuildMemoryMap();
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/* Load the OS loader */
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LlbLoadOsLoader();
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/* Jump to the OS Loader (FreeLDR in this case) */
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LoaderInit(&ArmBlock);
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}
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/* EOF */
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