#include "precomp.h"

Include dependency graph for envir.c:

Functions
VOID NTAPI	LlbEnvParseArguments (IN PATAG Arguments)

VOID NTAPI	LlbEnvGetMemoryInformation (IN PULONG Base, IN PULONG Size)

BOOLEAN NTAPI	LlbEnvGetRamDiskInformation (IN PULONG Base, IN PULONG Size)

PCHAR NTAPI	LlbEnvRead (IN PCHAR ValueName)

Variables
ULONG	LlbEnvHwPageSize

ULONG	LlbEnvHwMemStart = 0

ULONG	LlbEnvHwMemSize = 0

ULONG	LlbEnvRamDiskStart = 0

ULONG	LlbEnvRamDiskSize = 0

ULONG	LlbEnvHwRevision

CHAR	LlbEnvCmdLine [256]

CHAR	LlbValueData [32]

Function Documentation

◆ LlbEnvGetMemoryInformation()

VOID NTAPI LlbEnvGetMemoryInformation	(	IN PULONG	Base,
		IN PULONG	Size
	)

Definition at line 97 of file envir.c.

{
    /* Return RAM information */
    *Base = LlbEnvHwMemStart;
    *Size = LlbEnvHwMemSize;
}

Referenced by LlbHwBuildMemoryMap().

◆ LlbEnvGetRamDiskInformation()

BOOLEAN NTAPI LlbEnvGetRamDiskInformation	(	IN PULONG	Base,
		IN PULONG	Size
	)

Definition at line 107 of file envir.c.

{
    /* Do we have a ramdisk? */
    if (LlbEnvRamDiskSize == 0)
    {
        /* No */
        *Base = 0;
        *Size = 0;
        return FALSE;
    }
 
    /* Return ramdisk information */
    *Base = LlbEnvRamDiskStart;
    *Size = LlbEnvRamDiskSize;
    return TRUE;
}

Referenced by LlbHwBuildMemoryMap(), and LlbHwLoadOsLoaderFromRam().

◆ LlbEnvParseArguments()

VOID NTAPI LlbEnvParseArguments ( IN PATAG Arguments )

Definition at line 22 of file envir.c.

{
    PATAG Atag;
 
    /* Parse the ATAGs */
    Atag = Arguments;
    while (Atag->Hdr.Size)
    {
        /* Check tag type */
        switch (Atag->Hdr.Tag)
        {
            case ATAG_CORE:
 
                /* Save page size */
                LlbEnvHwPageSize = Atag->u.Core.PageSize;
                break;
 
            case ATAG_REVISION:
 
                /* Save page size */
                LlbEnvHwRevision = Atag->u.Revision.Rev;
                break;
 
            case ATAG_MEM:
 
                /* Save RAM start and size */
                if (!LlbEnvHwMemStart) LlbEnvHwMemStart = Atag->u.Mem.Start;
                LlbEnvHwMemSize += Atag->u.Mem.Size;
                break;
 
            case ATAG_INITRD2:
 
                /* Save RAMDISK start and size */
                LlbEnvRamDiskStart = Atag->u.InitRd2.Start;
                LlbEnvRamDiskSize = Atag->u.InitRd2.Size;
 
#ifdef _BEAGLE_
                /* Make sure it's 16MB-aligned */
                LlbEnvRamDiskSize = (LlbEnvRamDiskSize + (16 * 1024 * 1024) - 1)
                                    &~ ((16 * 1024 * 1024) - 1);
 
                /* The RAMDISK actually starts 16MB later */
                LlbEnvRamDiskStart += 16 * 1024 * 1024;
                LlbEnvRamDiskSize  -= 16 * 1024 * 1024;
#endif
                break;
 
            case ATAG_CMDLINE:
 
                /* Save command line */
                strncpy(LlbEnvCmdLine,
                        Atag->u.CmdLine.CmdLine,
                        Atag->Hdr.Size * sizeof(ULONG));
                break;
 
            /* Nothing left to handle */
            case ATAG_NONE:
            default:
                break;
        }
 
        /* Next tag */
        Atag = (PATAG)((PULONG)Atag + Atag->Hdr.Size);
    }
 
    /* For debugging */
    DbgPrint("[BOOTROM] Board Revision: %lx PageSize: %dKB RAM: %dMB CMDLINE: %s\n"
             "[RAMDISK] Base: %lx Size: %dMB\n",
             LlbEnvHwRevision,
             LlbEnvHwPageSize / 1024, LlbEnvHwMemSize / 1024 / 1024, LlbEnvCmdLine,
             LlbEnvRamDiskStart, LlbEnvRamDiskSize / 1024 / 1024);
}

Referenced by LlbStartup().

◆ LlbEnvRead()

PCHAR NTAPI LlbEnvRead ( IN PCHAR ValueName )

Definition at line 127 of file envir.c.

{
    PCHAR ValuePointer;
    ULONG Length = 0;
 
    /* Search for the value name */
    ValuePointer = strstr(LlbEnvCmdLine, ValueName);
    if (ValuePointer)
    {
        /* Get the value data and its length */
        ValuePointer += strlen(ValueName) + 1;
        if (strchr(ValuePointer, ','))
        {
            /* Stop before next parameter */
            Length = strchr(ValuePointer, ',') - ValuePointer;
        }
        else
        {
            /* Stop before the string ends */
            Length = strlen(ValuePointer);
        }
 
        /* Copy it */
        strncpy(LlbValueData, ValuePointer, Length);
    }
 
    /* Terminate the data */
    LlbValueData[Length] = ANSI_NULL;
 
    /* Return the data */
    return LlbValueData;
}