envir.h File Reference

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Classes
struct	_ATAG_HEADER
struct	_ATAG_CORE
struct	_ATAG_MEM
struct	_ATAG_REVISION
struct	_ATAG_INITRD2
struct	_ATAG_CMDLINE
struct	_ATAG

Macros
#define	ATAG_NONE   0x00000000
#define	ATAG_CORE   0x54410001
#define	ATAG_MEM   0x54410002
#define	ATAG_VIDEOTEXT   0x54410003
#define	ATAG_RAMDISK   0x54410004
#define	ATAG_INITRD2   0x54420005
#define	ATAG_SERIAL   0x54410006
#define	ATAG_REVISION   0x54410007
#define	ATAG_VIDEOLFB   0x54410008
#define	ATAG_CMDLINE   0x54410009

Typedefs
typedef struct _ATAG_HEADER	ATAG_HEADER
typedef struct _ATAG_HEADER *	PATAG_HEADER
typedef struct _ATAG_CORE	ATAG_CORE
typedef struct _ATAG_CORE *	PATAG_CORE
typedef struct _ATAG_MEM	ATAG_MEM
typedef struct _ATAG_MEM *	PATAG_MEM
typedef struct _ATAG_REVISION	ATAG_REVISION
typedef struct _ATAG_REVISION *	PATAG_REVISION
typedef struct _ATAG_INITRD2	ATAG_INITRD2
typedef struct _ATAG_INITRD2 *	PATAG_INITRD2
typedef struct _ATAG_CMDLINE	ATAG_CMDLINE
typedef struct _ATAG_CMDLINE *	PATAG_CMDLINE
typedef struct _ATAG	ATAG
typedef struct _ATAG *	PATAG

Functions
PCHAR NTAPI	LlbEnvRead (IN PCHAR Option)
BOOLEAN NTAPI	LlbEnvGetRamDiskInformation (IN PULONG Base, IN PULONG Size)
VOID NTAPI	LlbEnvGetMemoryInformation (IN PULONG Base, IN PULONG Size)
VOID NTAPI	LlbEnvParseArguments (IN PATAG Arguments)

Macro Definition Documentation

ATAG_CMDLINE

#define ATAG_CMDLINE   0x54410009

Definition at line 66 of file envir.h.

ATAG_CORE

#define ATAG_CORE   0x54410001

Definition at line 58 of file envir.h.

ATAG_INITRD2

#define ATAG_INITRD2   0x54420005

Definition at line 62 of file envir.h.

ATAG_MEM

#define ATAG_MEM   0x54410002

Definition at line 59 of file envir.h.

ATAG_NONE

#define ATAG_NONE   0x00000000

Definition at line 57 of file envir.h.

ATAG_RAMDISK

#define ATAG_RAMDISK   0x54410004

Definition at line 61 of file envir.h.

ATAG_REVISION

#define ATAG_REVISION   0x54410007

Definition at line 64 of file envir.h.

ATAG_SERIAL

#define ATAG_SERIAL   0x54410006

Definition at line 63 of file envir.h.

ATAG_VIDEOLFB

#define ATAG_VIDEOLFB   0x54410008

Definition at line 65 of file envir.h.

ATAG_VIDEOTEXT

#define ATAG_VIDEOTEXT   0x54410003

Definition at line 60 of file envir.h.

Typedef Documentation

ATAG

typedef struct _ATAG ATAG

ATAG_CMDLINE

typedef struct _ATAG_CMDLINE ATAG_CMDLINE

ATAG_CORE

typedef struct _ATAG_CORE ATAG_CORE

ATAG_HEADER

typedef struct _ATAG_HEADER ATAG_HEADER

ATAG_INITRD2

typedef struct _ATAG_INITRD2 ATAG_INITRD2

ATAG_MEM

typedef struct _ATAG_MEM ATAG_MEM

ATAG_REVISION

typedef struct _ATAG_REVISION ATAG_REVISION

PATAG

typedef struct _ATAG * PATAG

PATAG_CMDLINE

typedef struct _ATAG_CMDLINE * PATAG_CMDLINE

PATAG_CORE

typedef struct _ATAG_CORE * PATAG_CORE

PATAG_HEADER

typedef struct _ATAG_HEADER * PATAG_HEADER

PATAG_INITRD2

typedef struct _ATAG_INITRD2 * PATAG_INITRD2

PATAG_MEM

typedef struct _ATAG_MEM * PATAG_MEM

PATAG_REVISION

typedef struct _ATAG_REVISION * PATAG_REVISION

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

Option

)

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;
}

Referenced by LlbHwLoadOsLoaderFromRam(), and LlbLoadOsLoader().