3 Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
4 This program and the accompanying materials are licensed and made available under
5 the terms and conditions of the BSD License that accompanies this distribution.
6 The full text of the license may be found at
7 http://opensource.org/licenses/bsd-license.php.
9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
20 System reset Library Services. This library class provides a set of
21 methods to reset whole system with manipulate ICH.
29 #include <Library/ResetSystemLib.h>
30 #include <Library/BaseLib.h>
31 #include <Library/IoLib.h>
32 #include <Library/DebugLib.h>
33 #include <Library/PciLib.h>
39 #define RESET_GENERATOR_PORT R_PCH_RST_CNT
48 // Platform need to save OS reset request/types for next Android boot
50 IoWrite8 (0x72, CMOS_RESET_TYPE_BY_OS
);
51 IoWrite8 (0x73, ResetType
);
55 Calling this function causes a system-wide reset. This sets
56 all circuitry within the system to its initial state. This type of reset
57 is asynchronous to system operation and operates without regard to
60 System reset should not return, if it returns, it means the system does
61 not support cold reset.
69 PlatformResetHook(COLD_RESET
);
70 IoWrite8 (RESET_GENERATOR_PORT
, 0x2);
71 IoWrite8 (RESET_GENERATOR_PORT
, 0x6);
75 Calling this function causes a system-wide initialization. The processors
76 are set to their initial state, and pending cycles are not corrupted.
78 System reset should not return, if it returns, it means the system does
79 not support warm reset.
87 PlatformResetHook(WARM_RESET
);
88 IoWrite8 (RESET_GENERATOR_PORT
, 0x0);
89 IoWrite8 (RESET_GENERATOR_PORT
, 0x4);
93 Calling this function causes the system to enter a power state equivalent
94 to the ACPI G2/S5 or G3 states.
96 System shutdown should not return, if it returns, it means the system does
97 not support shut down reset.
109 PchPmioBase
= (UINT16
) (PciRead16 (PCI_LIB_ADDRESS(0, PCI_DEVICE_NUMBER_PCH_LPC
, 0, R_PCH_LPC_ACPI_BASE
)) & ~BIT0
);
112 // Then, GPE0_EN should be disabled to avoid any GPI waking up the system from S5
116 (UINTN
)(PchPmioBase
+ R_PCH_ACPI_GPE0a_EN
),
121 // Clear Sleep SMI Status
123 IoWrite16 (PchPmioBase
+ R_PCH_SMI_STS
,
124 (UINT16
)(IoRead16 (PchPmioBase
+ R_PCH_SMI_STS
) | B_PCH_SMI_STS_ON_SLP_EN
));
126 // Clear Sleep Type Enable
128 IoWrite16 (PchPmioBase
+ R_PCH_SMI_EN
,
129 (UINT16
)(IoRead16 (PchPmioBase
+ R_PCH_SMI_EN
) & (~B_PCH_SMI_EN_ON_SLP_EN
)));
131 // Clear Power Button Status
133 IoWrite16(PchPmioBase
+ R_PCH_ACPI_PM1_STS
, B_PCH_ACPI_PM1_STS_PWRBTN
);
136 // Secondly, Power Button Status bit must be cleared
138 // Write a "1" to bit[8] of power button status register at
139 // (ABASE + PM1_STS) to clear this bit
140 // Clear it through SMI Status register
142 Data16
= B_PCH_SMI_STS_PM1_STS_REG
;
143 IoWrite16 ((UINTN
) (PchPmioBase
+ R_PCH_SMI_STS
), Data16
);
146 // Finally, transform system into S5 sleep state
148 Data32
= IoRead32 ((UINTN
) (PchPmioBase
+ R_PCH_ACPI_PM1_CNT
));
150 Data32
= (UINT32
) ((Data32
&~(B_PCH_ACPI_PM1_CNT_SLP_TYP
+ B_PCH_ACPI_PM1_CNT_SLP_EN
)) | V_PCH_ACPI_PM1_CNT_S5
);
152 IoWrite32 ((UINTN
) (PchPmioBase
+ R_PCH_ACPI_PM1_CNT
), Data32
);
154 Data32
= Data32
| B_PCH_ACPI_PM1_CNT_SLP_EN
;
156 IoWrite32 ((UINTN
) (PchPmioBase
+ R_PCH_ACPI_PM1_CNT
), Data32
);
162 Calling this function causes the system to enter a power state for capsule
165 Reset update should not return, if it returns, it means the system does
166 not support capsule update.
171 EnterS3WithImmediateWake (
179 This function causes a systemwide reset. The exact type of the reset is
180 defined by the EFI_GUID that follows the Null-terminated Unicode string passed
181 into ResetData. If the platform does not recognize the EFI_GUID in ResetData
182 the platform must pick a supported reset type to perform.The platform may
183 optionally log the parameters from any non-normal reset that occurs.
185 @param[in] DataSize The size, in bytes, of ResetData.
186 @param[in] ResetData The data buffer starts with a Null-terminated string,
187 followed by the EFI_GUID.
191 ResetPlatformSpecific (