From ac8ebd0e73774c83bfa5cb3dd460c662000e0d19 Mon Sep 17 00:00:00 2001 From: Raul E Rangel Date: Mon, 20 Aug 2018 11:14:44 -0600 Subject: libpayload/arch/x86: Add support for initializing the APIC This is just the bare minimum required to initialize the APIC. I only support xAPIC and chose not to support x2APIC. We can add that functionality later when it's required. I also made the exception dispatcher call apic_eoi so that the callbacks won't forget to call it. BUG=b:109749762 TEST=Booted grunt and verified that depthcharge continued to function and that linux booted correctly. Also verified GDB still works. Change-Id: I420a4eadae84df088525e727b481089ef615183f Signed-off-by: Raul E Rangel Reviewed-on: https://review.coreboot.org/28241 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- payloads/libpayload/include/x86/arch/apic.h | 43 +++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 payloads/libpayload/include/x86/arch/apic.h (limited to 'payloads/libpayload/include/x86/arch/apic.h') diff --git a/payloads/libpayload/include/x86/arch/apic.h b/payloads/libpayload/include/x86/arch/apic.h new file mode 100644 index 0000000000..fdd447361a --- /dev/null +++ b/payloads/libpayload/include/x86/arch/apic.h @@ -0,0 +1,43 @@ +/* + * This file is part of the libpayload project. + * + * Copyright 2018 Google LLC. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef __ARCH_X86_INCLUDES_ARCH_APIC_H__ +#define __ARCH_X86_INCLUDES_ARCH_APIC_H__ + +/** Returns 1 if apic_init has been called */ +int apic_initialized(void); + +void apic_init(void); + +uint8_t apic_id(void); + +/** Signal the end of the interrupt handler. */ +void apic_eoi(void); + +#endif /* __ARCH_X86_INCLUDES_ARCH_APIC_H__ */ -- cgit v1.2.3