From 76c03152e110dcb770253b54277811228e8f78df Mon Sep 17 00:00:00 2001 From: Amaan Cheval Date: Mon, 9 Jul 2018 16:42:56 +0530 Subject: bsp/x86_64: Minimal bootable BSP Current state: - Basic context initialization and switching code. - Stubbed console (empty functions). - Mostly functional linker script (may need tweaks if we ever want to move away from the large code model (see: CPU_CFLAGS). - Fully functional boot, by using FreeBSD's bootloader to load RTEMS's ELF for UEFI-awareness. In short, the current state with this commit lets us boot, go through the system initialization functions, and then call user application's Init task too. Updates #2898. --- bsps/x86_64/amd64/include/start.h | 47 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 bsps/x86_64/amd64/include/start.h (limited to 'bsps/x86_64/amd64/include/start.h') diff --git a/bsps/x86_64/amd64/include/start.h b/bsps/x86_64/amd64/include/start.h new file mode 100644 index 0000000000..eee249e3a6 --- /dev/null +++ b/bsps/x86_64/amd64/include/start.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2018. + * Amaan Cheval + * + * 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. + * + * 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 LIBBSP_AMD64_START_H +#define LIBBSP_AMD64_START_H + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/** + * @brief Entry point for generated ELF. + * + * The linkcmds script sets this function as the entry point, to be jumped into + * the bootloader. It calls boot_card and kicks the whole RTEMS initialization + * process off. + */ +void _start(void); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_AMD64_START_H */ -- cgit v1.2.3