a806848ad5ae889396f7b23caaa3eb84488ada7b
[mirror_edk2.git] / BeagleBoardPkg / Library / BeagleBoardLib / BeagleBoard.c
1 /** @file
2 *
3 * Copyright (c) 2011, 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 if Trustzone is supported by your platform
59
60 A non-zero value must be returned if you want to support a Secure World on your platform.
61 ArmPlatformTrustzoneInit() will later set up the secure regions.
62 This function can return 0 even if Trustzone is supported by your processor. In this case,
63 the platform will continue to run in Secure World.
64
65 @return A non-zero value if Trustzone supported.
66
67 **/
68 UINTN
69 ArmPlatformTrustzoneSupported (
70 VOID
71 )
72 {
73 // The BeagleBoard starts in Normal World (Non Secure World)
74 return FALSE;
75 }
76
77 /**
78 Remap the memory at 0x0
79
80 Some platform requires or gives the ability to remap the memory at the address 0x0.
81 This function can do nothing if this feature is not relevant to your platform.
82
83 **/
84 VOID
85 ArmPlatformBootRemapping (
86 VOID
87 )
88 {
89 // Do nothing for the BeagleBoard
90 }
91
92 /**
93 Return the current Boot Mode
94
95 This function returns the boot reason on the platform
96
97 **/
98 EFI_BOOT_MODE
99 ArmPlatformGetBootMode (
100 VOID
101 )
102 {
103 return BOOT_WITH_FULL_CONFIGURATION;
104 }
105
106 /**
107 Initialize controllers that must setup at the early stage
108
109 Some peripherals must be initialized in Secure World.
110 For example, some L2x0 requires to be initialized in Secure World
111
112 **/
113 VOID
114 ArmPlatformNormalInitialize (
115 VOID
116 )
117 {
118 BEAGLEBOARD_REVISION Revision;
119
120 Revision = BeagleBoardGetRevision();
121
122 // Set up Pin muxing.
123 PadConfiguration (Revision);
124
125 // Set up system clocking
126 ClockInit ();
127
128 // Turn off the functional clock for Timer 3
129 MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
130 ArmDataSyncronizationBarrier ();
131
132 // Clear IRQs
133 MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
134 ArmDataSyncronizationBarrier ();
135 }
136
137 /**
138 Initialize the system (or sometimes called permanent) memory
139
140 This memory is generally represented by the DRAM.
141
142 **/
143 VOID
144 ArmPlatformInitializeSystemMemory (
145 VOID
146 )
147 {
148 // We do not need to initialize the System Memory on RTSM
149 }