hwapm.c File Reference

#include <freeldr.h>
#include <debug.h>

Include dependency graph for hwapm.c:

Go to the source code of this file.

Functions
	DBG_DEFAULT_CHANNEL (HWDETECT)
static BOOLEAN	FindApmBios (VOID)
VOID	DetectApmBios (PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)

Function Documentation

DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL

(

HWDETECT

)

DetectApmBios()

VOID DetectApmBios	(	PCONFIGURATION_COMPONENT_DATA	SystemKey,
		ULONG *	BusNumber
	)

Definition at line 58 of file hwapm.c.

{
    PCONFIGURATION_COMPONENT_DATA BiosKey;
    PCM_PARTIAL_RESOURCE_LIST PartialResourceList;
    ULONG Size;

    Size = sizeof(CM_PARTIAL_RESOURCE_LIST) -
           sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);

    if (FindApmBios())
    {
        /* Create 'Configuration Data' value */
        PartialResourceList = FrLdrHeapAlloc(Size, TAG_HW_RESOURCE_LIST);
        memset(PartialResourceList, 0, Size);
        PartialResourceList->Version = 0;
        PartialResourceList->Revision = 0;
        PartialResourceList->Count = 0;

        /* Create new bus key */
        FldrCreateComponentKey(SystemKey,
                               AdapterClass,
                               MultiFunctionAdapter,
                               0x0,
                               0x0,
                               0xFFFFFFFF,
                               "APM",
                               PartialResourceList,
                               Size,
                               &BiosKey);

        /* Increment bus number */
        (*BusNumber)++;
    }

    /* FIXME: Add configuration data */
}

Referenced by PcHwDetect().

FindApmBios()

static BOOLEAN FindApmBios ( VOID  )

static

Definition at line 28 of file hwapm.c.

{
  REGS  RegsIn;
  REGS  RegsOut;

  RegsIn.b.ah = 0x53;
  RegsIn.b.al = 0x00;
  RegsIn.w.bx = 0x0000;

  Int386(0x15, &RegsIn, &RegsOut);

  if (INT386_SUCCESS(RegsOut))
    {
      TRACE("Found APM BIOS\n");
      TRACE("AH: %x\n", RegsOut.b.ah);
      TRACE("AL: %x\n", RegsOut.b.al);
      TRACE("BH: %x\n", RegsOut.b.bh);
      TRACE("BL: %x\n", RegsOut.b.bl);
      TRACE("CX: %x\n", RegsOut.w.cx);

      return TRUE;
    }

  TRACE("No APM BIOS found\n");

  return FALSE;
}

Referenced by DetectApmBios().