From 8251c86b098623607a945f70721039528073b82b Mon Sep 17 00:00:00 2001 From: sigsegv7 Date: Wed, 4 Oct 2023 14:44:41 -0400 Subject: kernel/amd64: Add AMD64 CPU abstractions This commit adds the CPU abstraction files for AMD64. This abstraction implements CPU specific logic Signed-off-by: sigsegv7 --- sys/arch/amd64/cpu.c | 48 ++++++++++++++++++++++++++++++++++++++++++++ sys/include/arch/amd64/cpu.h | 47 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 95 insertions(+) create mode 100644 sys/arch/amd64/cpu.c create mode 100644 sys/include/arch/amd64/cpu.h diff --git a/sys/arch/amd64/cpu.c b/sys/arch/amd64/cpu.c new file mode 100644 index 0000000..50e4158 --- /dev/null +++ b/sys/arch/amd64/cpu.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * All rights reserved. + * + * 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. Neither the name of VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. + */ + +#include + +static struct cpu_info bsp_info; + +struct cpu_info * +amd64_get_bsp(void) +{ + return &bsp_info; +} + +/* + * TODO: Update this when adding SMP + * support. + */ +struct cpu_info * +amd64_this_cpu(void) +{ + return amd64_get_bsp(); +} diff --git a/sys/include/arch/amd64/cpu.h b/sys/include/arch/amd64/cpu.h new file mode 100644 index 0000000..b63d6e9 --- /dev/null +++ b/sys/include/arch/amd64/cpu.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * All rights reserved. + * + * 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. Neither the name of VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _AMD64_CPU_H_ +#define _AMD64_CPU_H_ + +#include + +#define this_cpu() amd64_this_cpu() +#define get_bsp() amd64_get_bsp() + +struct cpu_info { + void *pmap; /* Current pmap */ + uint32_t lapic_id; + volatile size_t lapic_tmr_freq; +}; + +struct cpu_info *amd64_this_cpu(void); +struct cpu_info *amd64_get_bsp(void); + +#endif /* !_AMD64_CPU_H_ */ -- cgit v1.2.3