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1d5d0ae9 | 1 | //\r |
2 | // Copyright (c) 2011, ARM Limited. All rights reserved.\r | |
3 | // \r | |
4 | // This program and the accompanying materials \r | |
5 | // are licensed and made available under the terms and conditions of the BSD License \r | |
6 | // which accompanies this distribution. The full text of the license may be found at \r | |
7 | // http://opensource.org/licenses/bsd-license.php \r | |
8 | //\r | |
9 | // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | //\r | |
12 | //\r | |
13 | \r | |
14 | #include <AsmMacroIoLib.h>\r | |
15 | #include <Base.h>\r | |
16 | #include <Library/PcdLib.h>\r | |
17 | #include <ArmPlatform.h>\r | |
f501f5d1 | 18 | #include <Drivers/PL354Smc.h>\r |
1d5d0ae9 | 19 | #include <AutoGen.h>\r |
20 | \r | |
21 | INCLUDE AsmMacroIoLib.inc\r | |
22 | \r | |
23 | EXPORT ArmPlatformIsMemoryInitialized\r | |
24 | EXPORT ArmPlatformInitializeBootMemory\r | |
f501f5d1 | 25 | IMPORT SMCInitializeNOR\r |
26 | IMPORT SMCInitializeSRAM\r | |
27 | IMPORT SMCInitializePeripherals\r | |
28 | IMPORT SMCInitializeVRAM\r | |
1d5d0ae9 | 29 | \r |
30 | PRESERVE8\r | |
31 | AREA CTA9x4Helper, CODE, READONLY\r | |
32 | \r | |
33 | /**\r | |
34 | Called at the early stage of the Boot phase to know if the memory has already been initialized\r | |
35 | \r | |
36 | Running the code from the reset vector does not mean we start from cold boot. In some case, we\r | |
37 | can go through this code with the memory already initialized.\r | |
38 | Because this function is called at the early stage, the implementation must not use the stack.\r | |
39 | Its implementation must probably done in assembly to ensure this requirement.\r | |
40 | \r | |
41 | @return Return the condition value into the 'Z' flag\r | |
42 | \r | |
43 | **/\r | |
44 | ArmPlatformIsMemoryInitialized\r | |
45 | // Check if the memory has been already mapped, if so skipped the memory initialization\r | |
46 | LoadConstantToReg (ARM_VE_SYS_CFGRW1_REG ,r0)\r | |
47 | ldr r0, [r0, #0]\r | |
48 | \r | |
49 | // 0x40000000 = Value of Physical Configuration Switch SW[0]\r | |
50 | and r0, r0, #0x40000000\r | |
51 | tst r0, #0x40000000\r | |
52 | bx lr\r | |
53 | \r | |
54 | /**\r | |
55 | Initialize the memory where the initial stacks will reside\r | |
56 | \r | |
57 | This memory can contain the initial stacks (Secure and Secure Monitor stacks).\r | |
58 | In some platform, this region is already initialized and the implementation of this function can\r | |
59 | do nothing. This memory can also represent the Secure RAM.\r | |
60 | This function is called before the satck has been set up. Its implementation must ensure the stack\r | |
61 | pointer is not used (probably required to use assembly language)\r | |
62 | \r | |
63 | **/\r | |
64 | ArmPlatformInitializeBootMemory\r | |
65 | mov r5, lr\r | |
f501f5d1 | 66 | \r |
67 | //\r | |
1d5d0ae9 | 68 | // Initialize PL354 SMC\r |
f501f5d1 | 69 | //\r |
1d5d0ae9 | 70 | LoadConstantToReg (ARM_VE_SMC_CTRL_BASE, r1)\r |
f501f5d1 | 71 | \r |
72 | // NOR Flash 0\r | |
73 | mov r2, PL354_SMC_DIRECT_CMD_ADDR_CS(0,0)\r | |
74 | blx SMCInitializeNOR\r | |
75 | \r | |
76 | // NOR Flash 1\r | |
77 | mov r2, PL354_SMC_DIRECT_CMD_ADDR_CS(1,0)\r | |
78 | blx SMCInitializeNOR\r | |
79 | \r | |
80 | // Setup SRAM\r | |
81 | blx SMCInitializeSRAM\r | |
82 | \r | |
83 | // Memory Mapped Peripherals\r | |
84 | blx SMCInitializePeripherals\r | |
85 | \r | |
86 | // Initialize VRAM\r | |
87 | //TODO: Check if we really must inititialize Video SRAM in UEFI. Does Linux can do it ? Does the Video driver can do it ?\r | |
88 | // It will be faster (only initialize if required) and easier (remove assembly code because of a stack available) to move this initialization.\r | |
76bc1743 | 89 | LoadConstantToReg (VRAM_MOTHERBOARD_BASE, r2)\r |
f501f5d1 | 90 | blx SMCInitializeVRAM\r |
91 | \r | |
1d5d0ae9 | 92 | bx r5\r |
f501f5d1 | 93 | \r |
1d5d0ae9 | 94 | END\r |