3b0244004853b42c347f90368fb2457dea1938aa
[mirror_edk2.git] / BeagleBoardPkg / Library / BeagleBoardLib / BeagleBoard.c
1 /** @file
2 *
3 * Copyright (c) 2011-2012, ARM Limited. All rights reserved.
4 *
5 * This program and the accompanying materials
6 * are licensed and made available under the terms and conditions of the BSD License
7 * which accompanies this distribution. The full text of the license may be found at
8 * http://opensource.org/licenses/bsd-license.php
9 *
10 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12 *
13 **/
14
15 #include <Library/IoLib.h>
16 #include <Library/ArmPlatformLib.h>
17 #include <Library/DebugLib.h>
18 #include <Library/PcdLib.h>
19
20 #include <Omap3530/Omap3530.h>
21 #include <BeagleBoard.h>
22
23 VOID
24 PadConfiguration (
25 BEAGLEBOARD_REVISION Revision
26 );
27
28 VOID
29 ClockInit (
30 VOID
31 );
32
33 /**
34 Detect board revision
35
36 @return Board revision
37 **/
38 BEAGLEBOARD_REVISION
39 BeagleBoardGetRevision (
40 VOID
41 )
42 {
43 UINT32 OldPinDir;
44 UINT32 Revision;
45
46 // Read GPIO 171, 172, 173
47 OldPinDir = MmioRead32 (GPIO6_BASE + GPIO_OE);
48 MmioWrite32(GPIO6_BASE + GPIO_OE, (OldPinDir | BIT11 | BIT12 | BIT13));
49 Revision = MmioRead32 (GPIO6_BASE + GPIO_DATAIN);
50
51 // Restore I/O settings
52 MmioWrite32 (GPIO6_BASE + GPIO_OE, OldPinDir);
53
54 return (BEAGLEBOARD_REVISION)((Revision >> 11) & 0x7);
55 }
56
57 /**
58 Return the current Boot Mode
59
60 This function returns the boot reason on the platform
61
62 **/
63 EFI_BOOT_MODE
64 ArmPlatformGetBootMode (
65 VOID
66 )
67 {
68 return BOOT_WITH_FULL_CONFIGURATION;
69 }
70
71 /**
72 Initialize controllers that must setup at the early stage
73
74 Some peripherals must be initialized in Secure World.
75 For example, some L2x0 requires to be initialized in Secure World
76
77 **/
78 RETURN_STATUS
79 ArmPlatformInitialize (
80 IN UINTN MpId
81 )
82 {
83 BEAGLEBOARD_REVISION Revision;
84
85 Revision = BeagleBoardGetRevision();
86
87 // Set up Pin muxing.
88 PadConfiguration (Revision);
89
90 // Set up system clocking
91 ClockInit ();
92
93 // Turn off the functional clock for Timer 3
94 MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
95 ArmDataSynchronizationBarrier ();
96
97 // Clear IRQs
98 MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
99 ArmDataSynchronizationBarrier ();
100
101 return RETURN_SUCCESS;
102 }
103
104 /**
105 Initialize the system (or sometimes called permanent) memory
106
107 This memory is generally represented by the DRAM.
108
109 **/
110 VOID
111 ArmPlatformInitializeSystemMemory (
112 VOID
113 )
114 {
115 // We do not need to initialize the System Memory on RTSM
116 }
117
118 VOID
119 ArmPlatformGetPlatformPpiList (
120 OUT UINTN *PpiListSize,
121 OUT EFI_PEI_PPI_DESCRIPTOR **PpiList
122 )
123 {
124 *PpiListSize = 0;
125 *PpiList = NULL;
126 }
127
128 UINTN
129 ArmPlatformGetCorePosition (
130 IN UINTN MpId
131 )
132 {
133 return 1;
134 }
135