UefiPayloadPkg: Enhance UEFI payload for coreboot and Slim Bootloader

[mirror_edk2.git] / UefiPayloadPkg / SecCore / Ia32 / SecEntry.nasm

diff --git a/UefiPayloadPkg/SecCore/Ia32/SecEntry.nasm b/UefiPayloadPkg/SecCore/Ia32/SecEntry.nasm
new file mode 100644 (file)
index 0000000..877fc61
--- /dev/null
+++ b/UefiPayloadPkg/SecCore/Ia32/SecEntry.nasm
@@ -0,0 +1,78 @@
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>\r
+; SPDX-License-Identifier: BSD-2-Clause-Patent\r
+;\r
+; Abstract:\r
+;\r
+;   Entry point for the coreboot UEFI payload.\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+SECTION .text\r
+\r
+; C Functions\r
+extern  ASM_PFX(SecStartup)\r
+\r
+; Pcds\r
+extern  ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))\r
+extern  ASM_PFX(PcdGet32 (PcdPayloadStackTop))\r
+\r
+;\r
+; SecCore Entry Point\r
+;\r
+; Processor is in flat protected mode\r
+;\r
+; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)\r
+; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor\r
+; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume\r
+;\r
+; @return     None  This routine does not return\r
+;\r
+global ASM_PFX(_ModuleEntryPoint)\r
+ASM_PFX(_ModuleEntryPoint):\r
+  ;\r
+  ; Disable all the interrupts\r
+  ;\r
+  cli\r
+\r
+  ;\r
+  ; Save the Payload HOB base address before switching the stack\r
+  ;\r
+  mov     eax, [esp + 4]\r
+\r
+  ;\r
+  ; Construct the temporary memory at 0x80000, length 0x10000\r
+  ;\r
+  mov     esp, DWORD [ASM_PFX(PcdGet32 (PcdPayloadStackTop))]\r
+\r
+  ;\r
+  ; Push the Payload HOB base address onto new stack\r
+  ;\r
+  push    eax\r
+\r
+  ;\r
+  ; Pass BFV into the PEI Core\r
+  ;\r
+  push    DWORD [ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))]\r
+\r
+  ;\r
+  ; Pass stack base into the PEI Core\r
+  ;\r
+  push    BASE_512KB\r
+\r
+  ;\r
+  ; Pass stack size into the PEI Core\r
+  ;\r
+  push    SIZE_64KB\r
+\r
+  ;\r
+  ; Pass Control into the PEI Core\r
+  ;\r
+  call    ASM_PFX(SecStartup)\r
+\r
+  ;\r
+  ; Should never return\r
+  ;\r
+  jmp     $\r
+\r