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40082598 AB |
1 | #\r |
2 | # Copyright (c) 2011-2013, ARM Limited. All rights reserved.\r | |
3 | # Copyright (c) 2014, Linaro Limited. All rights reserved.\r | |
4 | #\r | |
5 | # This program and the accompanying materials\r | |
6 | # are licensed and made available under the terms and conditions of the BSD License\r | |
7 | # which accompanies this distribution. The full text of the license may be found at\r | |
8 | # http://opensource.org/licenses/bsd-license.php\r | |
9 | #\r | |
10 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | #\r | |
13 | #\r | |
14 | \r | |
15 | #include <AsmMacroIoLib.h>\r | |
16 | #include <Base.h>\r | |
17 | #include <Library/ArmLib.h>\r | |
18 | #include <Library/PcdLib.h>\r | |
19 | #include <AutoGen.h>\r | |
20 | \r | |
21 | .text\r | |
22 | .align 2\r | |
23 | \r | |
24 | GCC_ASM_EXPORT(ArmPlatformPeiBootAction)\r | |
25 | GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)\r | |
26 | GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)\r | |
27 | GCC_ASM_EXPORT(ArmPlatformGetCorePosition)\r | |
28 | GCC_ASM_EXPORT(ArmGetPhysAddrTop)\r | |
29 | \r | |
30 | GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)\r | |
31 | GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)\r | |
32 | GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)\r | |
33 | \r | |
34 | .LArm32LinuxMagic:\r | |
35 | .byte 0x18, 0x28, 0x6f, 0x01\r | |
36 | \r | |
37 | ASM_PFX(ArmPlatformPeiBootAction):\r | |
38 | mov r11, r14 // preserve LR\r | |
39 | mov r10, r0 // preserve DTB pointer\r | |
40 | mov r9, r1 // preserve base of image pointer\r | |
41 | \r | |
42 | //\r | |
43 | // If we are booting from RAM using the Linux kernel boot protocol, r0 will\r | |
44 | // point to the DTB image in memory. Otherwise, we are just coming out of\r | |
45 | // reset, and r0 will be 0.\r | |
46 | //\r | |
47 | teq r0, #0\r | |
48 | beq .Lout\r | |
49 | \r | |
50 | //\r | |
51 | // The base of the runtime image has been preserved in r1. Check whether\r | |
52 | // the expected magic number can be found in the header.\r | |
53 | //\r | |
54 | ldr r8, .LArm32LinuxMagic\r | |
55 | ldr r7, [r1, #0x24]\r | |
56 | cmp r7, r8\r | |
57 | bne .Lout\r | |
58 | \r | |
59 | //\r | |
60 | //\r | |
61 | // OK, so far so good. We have confirmed that we likely have a DTB and are\r | |
62 | // booting via the ARM Linux boot protocol. Update the base-of-image PCD\r | |
63 | // to the actual relocated value, and add the shift of PcdFdBaseAddress to\r | |
64 | // PcdFvBaseAddress as well\r | |
65 | //\r | |
66 | ldr r8, =PcdGet64 (PcdFdBaseAddress)\r | |
67 | ldr r7, =PcdGet64 (PcdFvBaseAddress)\r | |
68 | ldr r6, [r8]\r | |
69 | ldr r5, [r7]\r | |
70 | sub r5, r5, r6\r | |
71 | add r5, r5, r1\r | |
72 | str r1, [r8]\r | |
73 | str r5, [r7]\r | |
74 | \r | |
75 | //\r | |
76 | // Discover the memory size and offset from the DTB, and record in the\r | |
77 | // respective PCDs. This will also return false if a corrupt DTB is\r | |
78 | // encountered. Since we are calling a C function, use the window at the\r | |
79 | // beginning of the FD image as a temp stack.\r | |
80 | //\r | |
8457f5e4 AB |
81 | ldr r1, =PcdGet64 (PcdSystemMemoryBase)\r |
82 | ldr r2, =PcdGet64 (PcdSystemMemorySize)\r | |
40082598 AB |
83 | mov sp, r5\r |
84 | bl FindMemnode\r | |
85 | teq r0, #0\r | |
86 | beq .Lout\r | |
87 | \r | |
88 | //\r | |
89 | // Copy the DTB to the slack space right after the 64 byte arm64/Linux style\r | |
90 | // image header at the base of this image (defined in the FDF), and record the\r | |
91 | // pointer in PcdDeviceTreeInitialBaseAddress.\r | |
92 | //\r | |
93 | ldr r8, =PcdGet64 (PcdDeviceTreeInitialBaseAddress)\r | |
94 | add r9, r9, #0x40\r | |
95 | str r9, [r8]\r | |
96 | \r | |
97 | mov r0, r9\r | |
98 | mov r1, r10\r | |
99 | bl CopyFdt\r | |
100 | \r | |
101 | .Lout:\r | |
102 | bx r11\r | |
103 | \r | |
104 | //UINTN\r | |
105 | //ArmPlatformGetPrimaryCoreMpId (\r | |
106 | // VOID\r | |
107 | // );\r | |
108 | ASM_PFX(ArmPlatformGetPrimaryCoreMpId):\r | |
109 | LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)\r | |
110 | ldr r0, [r0]\r | |
111 | bx lr\r | |
112 | \r | |
113 | //UINTN\r | |
114 | //ArmPlatformIsPrimaryCore (\r | |
115 | // IN UINTN MpId\r | |
116 | // );\r | |
117 | ASM_PFX(ArmPlatformIsPrimaryCore):\r | |
118 | mov r0, #1\r | |
119 | bx lr\r | |
120 | \r | |
121 | //UINTN\r | |
122 | //ArmPlatformGetCorePosition (\r | |
123 | // IN UINTN MpId\r | |
124 | // );\r | |
125 | // With this function: CorePos = (ClusterId * 4) + CoreId\r | |
126 | ASM_PFX(ArmPlatformGetCorePosition):\r | |
127 | and r1, r0, #ARM_CORE_MASK\r | |
128 | and r0, r0, #ARM_CLUSTER_MASK\r | |
129 | add r0, r1, r0, LSR #6\r | |
130 | bx lr\r | |
131 | \r | |
132 | //EFI_PHYSICAL_ADDRESS\r | |
133 | //GetPhysAddrTop (\r | |
134 | // VOID\r | |
135 | // );\r | |
136 | ASM_PFX(ArmGetPhysAddrTop):\r | |
137 | mov r0, #0x00000000\r | |
138 | mov r1, #0x10000\r | |
139 | bx lr\r | |
140 | \r |