From fab82c1873b792bce33fb22c32db71324fc0ac3b Mon Sep 17 00:00:00 2001 From: Jordan Justen Date: Thu, 13 Nov 2014 18:24:59 +0000 Subject: UefiCpuPkg/CpuDxe: Add stackless assembly AP entry points The AP startup code simply jumps into this code with the CpuDxe driver without setting up a stack for the processor. Therefore, this code must setup the stack before calling into C code. This is the basic flow: * AP enters CpuDxe driver code (AsmApEntryPoint) without stack - AP grabs a lock - AP sets up stack - AP calls CpuMp.c:ApEntryPointInC - If ApEntryPointInC returns, the lock is freed, and another AP may run - The AP C code may call AsmApDoneWithCommonStack to indicate that the AP is no longer using the stack, and another may therefore proceed to use the stack and then call ApEntryPointInC Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen Reviewed-by: Jeff Fan git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16347 6f19259b-4bc3-4df7-8a09-765794883524 --- UefiCpuPkg/CpuDxe/CpuDxe.inf | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'UefiCpuPkg/CpuDxe/CpuDxe.inf') diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.inf b/UefiCpuPkg/CpuDxe/CpuDxe.inf index e49548f40b..9952eb7007 100644 --- a/UefiCpuPkg/CpuDxe/CpuDxe.inf +++ b/UefiCpuPkg/CpuDxe/CpuDxe.inf @@ -53,11 +53,17 @@ Ia32/CpuAsm.asm | MSFT Ia32/CpuAsm.asm | INTEL Ia32/CpuAsm.S | GCC + Ia32/MpAsm.asm | MSFT + Ia32/MpAsm.asm | INTEL + Ia32/MpAsm.nasm | GCC [Sources.X64] X64/CpuAsm.asm | MSFT X64/CpuAsm.asm | INTEL X64/CpuAsm.S | GCC + X64/MpAsm.asm | MSFT + X64/MpAsm.asm | INTEL + X64/MpAsm.nasm | GCC [Protocols] gEfiCpuArchProtocolGuid ## PRODUCES -- cgit v1.2.3