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/** @file
Copyright (c) 2007 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
Module Name:
IdeBus.h
Abstract:
System reset Library Services. This library class provides a set of
methods to reset whole system with manipulate ICH.
**/
#include <Base.h>
#include <Library/ResetSystemLib.h>
#include <Library/BaseLib.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/PciLib.h>
#include "PchRegs.h"
#include "Rsci.h"
#include "Platform.h"
#define RESET_GENERATOR_PORT R_PCH_RST_CNT
VOID
EFIAPI
PlatformResetHook (
UINT8 ResetType
)
{
//
// Platform need to save OS reset request/types for next Android boot
//
IoWrite8 (0x72, CMOS_RESET_TYPE_BY_OS);
IoWrite8 (0x73, ResetType);
}
/**
Calling this function causes a system-wide reset. This sets
all circuitry within the system to its initial state. This type of reset
is asynchronous to system operation and operates without regard to
cycle boundaries.
System reset should not return, if it returns, it means the system does
not support cold reset.
**/
VOID
EFIAPI
ResetCold (
VOID
)
{
PlatformResetHook(COLD_RESET);
IoWrite8 (RESET_GENERATOR_PORT, 0x2);
IoWrite8 (RESET_GENERATOR_PORT, 0x6);
}
/**
Calling this function causes a system-wide initialization. The processors
are set to their initial state, and pending cycles are not corrupted.
System reset should not return, if it returns, it means the system does
not support warm reset.
**/
VOID
EFIAPI
ResetWarm (
VOID
)
{
PlatformResetHook(WARM_RESET);
IoWrite8 (RESET_GENERATOR_PORT, 0x0);
IoWrite8 (RESET_GENERATOR_PORT, 0x4);
}
/**
Calling this function causes the system to enter a power state equivalent
to the ACPI G2/S5 or G3 states.
System shutdown should not return, if it returns, it means the system does
not support shut down reset.
**/
VOID
EFIAPI
ResetShutdown (
VOID
)
{
UINT16 PchPmioBase;
UINT16 Data16;
UINT32 Data32;
PchPmioBase = (UINT16) (PciRead16 (PCI_LIB_ADDRESS(0, PCI_DEVICE_NUMBER_PCH_LPC, 0, R_PCH_LPC_ACPI_BASE)) & ~BIT0);
//
// Then, GPE0_EN should be disabled to avoid any GPI waking up the system from S5
//
Data16 = 0;
IoWrite16 (
(UINTN)(PchPmioBase + R_PCH_ACPI_GPE0a_EN),
(UINT16)Data16
);
//
// Clear Sleep SMI Status
//
IoWrite16 (PchPmioBase + R_PCH_SMI_STS,
(UINT16)(IoRead16 (PchPmioBase + R_PCH_SMI_STS) | B_PCH_SMI_STS_ON_SLP_EN));
//
// Clear Sleep Type Enable
//
IoWrite16 (PchPmioBase + R_PCH_SMI_EN,
(UINT16)(IoRead16 (PchPmioBase + R_PCH_SMI_EN) & (~B_PCH_SMI_EN_ON_SLP_EN)));
//
// Clear Power Button Status
//
IoWrite16(PchPmioBase + R_PCH_ACPI_PM1_STS, B_PCH_ACPI_PM1_STS_PWRBTN);
//
// Secondly, Power Button Status bit must be cleared
//
// Write a "1" to bit[8] of power button status register at
// (ABASE + PM1_STS) to clear this bit
// Clear it through SMI Status register
//
Data16 = B_PCH_SMI_STS_PM1_STS_REG;
IoWrite16 ((UINTN) (PchPmioBase + R_PCH_SMI_STS), Data16);
//
// Finally, transform system into S5 sleep state
//
Data32 = IoRead32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT));
Data32 = (UINT32) ((Data32 &~(B_PCH_ACPI_PM1_CNT_SLP_TYP + B_PCH_ACPI_PM1_CNT_SLP_EN)) | V_PCH_ACPI_PM1_CNT_S5);
IoWrite32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT), Data32);
Data32 = Data32 | B_PCH_ACPI_PM1_CNT_SLP_EN;
IoWrite32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT), Data32);
return;
}
/**
Calling this function causes the system to enter a power state for capsule
update.
Reset update should not return, if it returns, it means the system does
not support capsule update.
**/
VOID
EFIAPI
EnterS3WithImmediateWake (
VOID
)
{
ASSERT (FALSE);
}
/**
This function causes a systemwide reset. The exact type of the reset is
defined by the EFI_GUID that follows the Null-terminated Unicode string passed
into ResetData. If the platform does not recognize the EFI_GUID in ResetData
the platform must pick a supported reset type to perform.The platform may
optionally log the parameters from any non-normal reset that occurs.
@param[in] DataSize The size, in bytes, of ResetData.
@param[in] ResetData The data buffer starts with a Null-terminated string,
followed by the EFI_GUID.
**/
VOID
EFIAPI
ResetPlatformSpecific (
IN UINTN DataSize,
IN VOID *ResetData
)
{
ResetCold ();
}
/**
The ResetSystem function resets the entire platform.
@param[in] ResetType The type of reset to perform.
@param[in] ResetStatus The status code for the reset.
@param[in] DataSize The size, in bytes, of ResetData.
@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
the data buffer starts with a Null-terminated string, optionally
followed by additional binary data. The string is a description
that the caller may use to further indicate the reason for the
system reset.
**/
VOID
EFIAPI
ResetSystem (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN UINTN DataSize,
IN VOID *ResetData OPTIONAL
)
{
switch (ResetType) {
case EfiResetWarm:
ResetWarm ();
break;
case EfiResetCold:
ResetCold ();
break;
case EfiResetShutdown:
ResetShutdown ();
return;
case EfiResetPlatformSpecific:
ResetPlatformSpecific (DataSize, ResetData);
return;
default:
return;
}
}
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