diff options
Diffstat (limited to 'sys/arch/amd64/amd64/machdep.c')
-rw-r--r-- | sys/arch/amd64/amd64/machdep.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c new file mode 100644 index 0000000..19ba28a --- /dev/null +++ b/sys/arch/amd64/amd64/machdep.c @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora 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 Hyra 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 <sys/types.h> +#include <machine/cpu.h> +#include <machine/gdt.h> +#include <machine/idt.h> +#include <machine/trap.h> +#include <machine/asm.h> +#include <machine/cpuid.h> + +static struct cpu_info g_bsp_ci = {0}; +static struct gdtr bsp_gdtr = { + .limit = sizeof(struct gdt_entry) * 256 - 1, + .offset = (uintptr_t)&g_gdt_data[0] +}; + +static void +setup_vectors(void) +{ + idt_set_desc(0x0, IDT_TRAP_GATE, ISR(arith_err), 0); + idt_set_desc(0x2, IDT_TRAP_GATE, ISR(nmi), 0); + idt_set_desc(0x3, IDT_TRAP_GATE, ISR(breakpoint_handler), 0); + idt_set_desc(0x4, IDT_TRAP_GATE, ISR(overflow), 0); + idt_set_desc(0x5, IDT_TRAP_GATE, ISR(bound_range), 0); + idt_set_desc(0x6, IDT_TRAP_GATE, ISR(invl_op), 0); + idt_set_desc(0x8, IDT_TRAP_GATE, ISR(double_fault), 0); + idt_set_desc(0xA, IDT_TRAP_GATE, ISR(invl_tss), 0); + idt_set_desc(0xB, IDT_TRAP_GATE, ISR(segnp), 0); + idt_set_desc(0xC, IDT_TRAP_GATE, ISR(ss_fault), 0); + idt_set_desc(0xD, IDT_TRAP_GATE, ISR(general_prot), 0); + idt_set_desc(0xE, IDT_TRAP_GATE, ISR(page_fault), 0); +} + +void +cpu_startup(void) +{ + gdt_load(&bsp_gdtr); + idt_load(); + + setup_vectors(); + amd64_write_gs_base((uintptr_t)&g_bsp_ci); +} |