ACPI_STATUS
AcpiUtValidateFadt (
void)
{
/*
* Verify Fixed ACPI Description Table fields,
* but don't abort on any problems, just display error
*/
if (AcpiGbl_FADT->Pm1EvtLen < 4)
{
AcpiUtFadtRegisterError ("PM1_EVT_LEN",
(UINT32) AcpiGbl_FADT->Pm1EvtLen,
ACPI_FADT_OFFSET (Pm1EvtLen));
}
if (!AcpiGbl_FADT->Pm1CntLen)
{
AcpiUtFadtRegisterError ("PM1_CNT_LEN", 0,
ACPI_FADT_OFFSET (Pm1CntLen));
}
if (!ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1aEvtBlk.Address))
{
AcpiUtFadtRegisterError ("X_PM1a_EVT_BLK", 0,
ACPI_FADT_OFFSET (XPm1aEvtBlk.Address));
}
if (!ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1aCntBlk.Address))
{
AcpiUtFadtRegisterError ("X_PM1a_CNT_BLK", 0,
ACPI_FADT_OFFSET (XPm1aCntBlk.Address));
}
if (!ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPmTmrBlk.Address))
{
AcpiUtFadtRegisterError ("X_PM_TMR_BLK", 0,
ACPI_FADT_OFFSET (XPmTmrBlk.Address));
}
if ((ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address) &&
!AcpiGbl_FADT->Pm2CntLen))
{
AcpiUtFadtRegisterError ("PM2_CNT_LEN",
(UINT32) AcpiGbl_FADT->Pm2CntLen,
ACPI_FADT_OFFSET (Pm2CntLen));
}
if (AcpiGbl_FADT->PmTmLen < 4)
{
AcpiUtFadtRegisterError ("PM_TM_LEN",
(UINT32) AcpiGbl_FADT->PmTmLen,
ACPI_FADT_OFFSET (PmTmLen));
}
/* Length of GPE blocks must be a multiple of 2 */
if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) &&
(AcpiGbl_FADT->Gpe0BlkLen & 1))
{
AcpiUtFadtRegisterError ("(x)GPE0_BLK_LEN",
(UINT32) AcpiGbl_FADT->Gpe0BlkLen,
ACPI_FADT_OFFSET (Gpe0BlkLen));
}
if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) &&
(AcpiGbl_FADT->Gpe1BlkLen & 1))
{
AcpiUtFadtRegisterError ("(x)GPE1_BLK_LEN",
(UINT32) AcpiGbl_FADT->Gpe1BlkLen,
ACPI_FADT_OFFSET (Gpe1BlkLen));
}
return (AE_OK);
}
acpi_status
acpi_hw_initialize (
void)
{
acpi_status status = AE_OK;
u32 index;
FUNCTION_TRACE ("Hw_initialize");
/* We must have the ACPI tables by the time we get here */
if (!acpi_gbl_FADT) {
acpi_gbl_restore_acpi_chipset = FALSE;
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No FADT!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Identify current ACPI/legacy mode */
switch (acpi_gbl_system_flags & SYS_MODES_MASK) {
case (SYS_MODE_ACPI):
acpi_gbl_original_mode = SYS_MODE_ACPI;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "System supports ACPI mode only.\n"));
break;
case (SYS_MODE_LEGACY):
acpi_gbl_original_mode = SYS_MODE_LEGACY;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Tables loaded from buffer, hardware assumed to support LEGACY mode only.\n"));
break;
case (SYS_MODE_ACPI | SYS_MODE_LEGACY):
if (acpi_hw_get_mode () == SYS_MODE_ACPI) {
acpi_gbl_original_mode = SYS_MODE_ACPI;
}
else {
acpi_gbl_original_mode = SYS_MODE_LEGACY;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System supports both ACPI and LEGACY modes.\n"));
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System is currently in %s mode.\n",
(acpi_gbl_original_mode == SYS_MODE_ACPI) ? "ACPI" : "LEGACY"));
break;
}
if (acpi_gbl_system_flags & SYS_MODE_ACPI) {
/* Target system supports ACPI mode */
/*
* The purpose of this code is to save the initial state
* of the ACPI event enable registers. An exit function will be
* registered which will restore this state when the application
* exits. The exit function will also clear all of the ACPI event
* status bits prior to restoring the original mode.
*
* The location of the PM1a_evt_blk enable registers is defined as the
* base of PM1a_evt_blk + DIV_2(PM1a_evt_blk_length). Since the spec further
* fully defines the PM1a_evt_blk to be a total of 4 bytes, the offset
* for the enable registers is always 2 from the base. It is hard
* coded here. If this changes in the spec, this code will need to
* be modified. The PM1b_evt_blk behaves as expected.
*/
acpi_gbl_pm1_enable_register_save = (u16) acpi_hw_register_read (
ACPI_MTX_LOCK, PM1_EN);
/*
* The GPEs behave similarly, except that the length of the register
* block is not fixed, so the buffer must be allocated with malloc
*/
if (ACPI_VALID_ADDRESS (acpi_gbl_FADT->Xgpe0blk.address) &&
acpi_gbl_FADT->gpe0blk_len) {
/* GPE0 specified in FADT */
acpi_gbl_gpe0enable_register_save = ACPI_MEM_ALLOCATE (
DIV_2 (acpi_gbl_FADT->gpe0blk_len));
if (!acpi_gbl_gpe0enable_register_save) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save state of GPE0 enable bits */
for (index = 0; index < DIV_2 (acpi_gbl_FADT->gpe0blk_len); index++) {
acpi_gbl_gpe0enable_register_save[index] =
(u8) acpi_hw_register_read (ACPI_MTX_LOCK, GPE0_EN_BLOCK | index);
}
}
else {
acpi_gbl_gpe0enable_register_save = NULL;
}
if (ACPI_VALID_ADDRESS (acpi_gbl_FADT->Xgpe1_blk.address) &&
acpi_gbl_FADT->gpe1_blk_len) {
/* GPE1 defined */
acpi_gbl_gpe1_enable_register_save = ACPI_MEM_ALLOCATE (
DIV_2 (acpi_gbl_FADT->gpe1_blk_len));
if (!acpi_gbl_gpe1_enable_register_save) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* save state of GPE1 enable bits */
for (index = 0; index < DIV_2 (acpi_gbl_FADT->gpe1_blk_len); index++) {
acpi_gbl_gpe1_enable_register_save[index] =
(u8) acpi_hw_register_read (ACPI_MTX_LOCK, GPE1_EN_BLOCK | index);
}
}
else {
acpi_gbl_gpe1_enable_register_save = NULL;
}
}
return_ACPI_STATUS (status);
}