94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/*
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Copyright 2025 Kamil Kowalczyk
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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“AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_CPU_H
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#define _SYS_CPU_H
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#include <libk/types.h>
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#include <libk/compiler.h>
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struct gdt_entry {
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uint16_t limit_low;
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uint16_t base_low;
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uint8_t base_mid;
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uint8_t access;
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uint8_t gran;
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uint8_t base_up;
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} packed;
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struct gdt_ptr {
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uint16_t limit;
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uint32_t base;
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} packed;
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struct tss {
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uint32_t link;
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uint32_t esp0, ss0;
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uint32_t esp1, ss1;
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uint32_t esp2, ss2;
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uint32_t cr3;
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uint32_t eip, eflags, eax, ecx, edx, ebx, esp, ebp, esi, edi;
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uint32_t es, cs, ss, ds, fs, gs;
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uint32_t ldt;
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uint16_t trap;
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uint16_t iomap;
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} packed;
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struct idt_entry {
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uint16_t base_low;
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uint16_t sel;
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uint8_t always0;
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uint8_t flags;
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uint16_t base_up;
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} packed;
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struct idt_ptr {
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uint16_t limit;
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uint32_t base;
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} packed;
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struct trapframe {
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uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax;
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uint32_t ds;
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uint32_t cr3;
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uint32_t trapno;
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uint32_t ec;
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uint32_t eip, cs, eflags, uesp, uss;
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} packed;
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void cpu_init(void);
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void intr_save(void);
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void intr_restore(void);
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void cpu_relax(void);
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#endif // _SYS_CPU_H
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