projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| f9cec5f1 | 1 | //\r |
| 51ad04cb | 2 | // Copyright (c) 2011-2014, ARM Limited. All rights reserved.\r |
| f9cec5f1 HL |
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 | |
| 51ad04cb | 14 | #include <AsmMacroIoLibV8.h>\r |
| f9cec5f1 HL |
15 | #include <Base.h>\r |
| 16 | #include <Library/ArmPlatformLib.h>\r | |
| 17 | #include <AutoGen.h>\r | |
| 18 | #include <ArmPlatform.h>\r | |
| 19 | \r | |
| 20 | .text\r | |
| 21 | .align 3\r | |
| 22 | \r | |
| 919a3a02 BJ |
23 | GCC_ASM_EXPORT(ArmPlatformSecBootAction)\r |
| 24 | GCC_ASM_EXPORT(ArmPlatformSecBootMemoryInit)\r | |
| 25 | GCC_ASM_EXPORT(ArmSecMpCoreSecondariesWrite)\r | |
| 26 | GCC_ASM_EXPORT(ArmSecMpCoreSecondariesRead)\r | |
| f9cec5f1 HL |
27 | \r |
| 28 | /**\r | |
| 29 | Call at the beginning of the platform boot up\r | |
| 30 | \r | |
| 31 | This function allows the firmware platform to do extra actions at the early\r | |
| 32 | stage of the platform power up.\r | |
| 33 | \r | |
| 34 | Note: This function must be implemented in assembler as there is no stack set up yet\r | |
| 35 | \r | |
| 36 | **/\r | |
| 37 | ASM_PFX(ArmPlatformSecBootAction):\r | |
| 38 | ret\r | |
| 39 | \r | |
| 40 | /**\r | |
| 41 | Initialize the memory where the initial stacks will reside\r | |
| 42 | \r | |
| 43 | This memory can contain the initial stacks (Secure and Secure Monitor stacks).\r | |
| 44 | In some platform, this region is already initialized and the implementation of this function can\r | |
| 45 | do nothing. This memory can also represent the Secure RAM.\r | |
| 46 | This function is called before the stack has been set up. Its implementation must ensure the stack\r | |
| 47 | pointer is not used (probably required to use assembly language)\r | |
| 48 | \r | |
| 49 | **/\r | |
| 50 | ASM_PFX(ArmPlatformSecBootMemoryInit):\r | |
| 51 | // The SMC does not need to be initialized for RTSM\r | |
| 52 | ret\r | |
| 53 | \r | |
| 54 | \r | |
| 55 | // NOTE:\r | |
| 56 | // The foundation model does not have the VE_SYS_REGS like all the other VE\r | |
| 57 | // platforms. We pick a spot in RAM that *should* be safe in the simple case\r | |
| 58 | // of no UEFI apps interfering (Only the Linux loader getting used). By the\r | |
| 59 | // time we come to load Linux we should have all the cores in a safe place.\r | |
| 60 | // The image expects to be loaded at 0xa0000000. We also place the mailboxes\r | |
| 61 | // here as it does not matter if we corrupt the image at this time.\r | |
| 62 | // NOTE also see: "ArmVExpressLibRTSM/RTSMFoundation.c"\r | |
| 63 | \r | |
| 64 | /* Write the flag register used to start Secondary cores */\r | |
| 65 | ASM_PFX(ArmSecMpCoreSecondariesWrite):\r | |
| 66 | ldr x1, =0xa0000000\r | |
| 67 | str w0, [x1]\r | |
| 68 | ret\r | |
| 69 | \r | |
| 70 | \r | |
| 71 | /* Read the flag register used to start Secondary cores */\r | |
| 72 | ASM_PFX(ArmSecMpCoreSecondariesRead):\r | |
| 73 | ldr x1, =0xa0000000\r | |
| 74 | ldr w0, [x1]\r | |
| 75 | ret\r |