diff options
Diffstat (limited to 'sys/include/arch/amd64')
| -rw-r--r-- | sys/include/arch/amd64/frame.h | 116 | ||||
| -rw-r--r-- | sys/include/arch/amd64/gdt.h | 80 | ||||
| -rw-r--r-- | sys/include/arch/amd64/idt.h | 72 | ||||
| -rw-r--r-- | sys/include/arch/amd64/trap.h | 78 |
4 files changed, 346 insertions, 0 deletions
diff --git a/sys/include/arch/amd64/frame.h b/sys/include/arch/amd64/frame.h new file mode 100644 index 0000000..6239eff --- /dev/null +++ b/sys/include/arch/amd64/frame.h @@ -0,0 +1,116 @@ +/* + * 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. + */ + +/* $Id$ */ + +#ifndef _AMD64_FRAME_H_ +#define _AMD64_FRAME_H_ + +#if !defined(__ASSEMBLER__) +struct trapframe { + uint64_t trapno; + uint64_t rax; + uint64_t rcx; + uint64_t rdx; + uint64_t rbx; + uint64_t rsi; + uint64_t rdi; + uint64_t rbp; + uint64_t r8; + uint64_t r9; + uint64_t r10; + uint64_t r11; + uint64_t r12; + uint64_t r13; + uint64_t r14; + uint64_t r15; + /* Pushed by hardware */ + uint64_t error_code; + uint64_t rip; + uint64_t cs; + uint64_t rflags; + uint64_t rsp; + uint64_t ss; +}; +#else +/* + * XXX: Before this macro is invoked, + * you should determine if an error + * code will be present already on the + * stack. If not, push a null qword as + * padding (e.g push $0). + * + * There *must* be a value used + * as an error code whether that be + * a real error code or just padding. + * + * Failing to do so will result in + * undefined behaviour. + * + */ +.macro push_trapframe trapno + push %r15 + push %r14 + push %r13 + push %r12 + push %r11 + push %r10 + push %r9 + push %r8 + push %rbp + push %rdi + push %rsi + push %rbx + push %rdx + push %rcx + push %rax + push \trapno +.endm + +.macro pop_trapframe trapno + add $8, %rsp /* Trapno */ + pop %rax + pop %rcx + pop %rdx + pop %rbx + pop %rsi + pop %rdi + pop %rbp + pop %r8 + pop %r9 + pop %r10 + pop %r12 + pop %r13 + pop %r14 + pop %r15 + add $8, %rsp /* Pop error code */ + iretq +.endm +#endif /* !defined(__ASSEMBLER__) */ +#endif /* !_AMD64_FRAME_H_ */ diff --git a/sys/include/arch/amd64/gdt.h b/sys/include/arch/amd64/gdt.h new file mode 100644 index 0000000..756e2a6 --- /dev/null +++ b/sys/include/arch/amd64/gdt.h @@ -0,0 +1,80 @@ +/* + * 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. + */ + +/* $Id$ */ + +#ifndef AMD64_GDT_H_ +#define AMD64_GDT_H_ + +#include <sys/types.h> +#include <sys/cdefs.h> + +#define GDT_TSS 5 +#define KERNEL_CS 0x8 +#define KERNEL_DS 0x10 + +struct __packed gdt_entry { + uint16_t limit; + uint16_t base_low; + uint8_t base_mid; + uint8_t access; + uint8_t granularity; + uint8_t base_hi; +}; + +struct __packed gdtr { + uint16_t limit; + uintptr_t offset; +}; + +static inline void +gdt_load(struct gdtr *gdtr) +{ + __asm("lgdt %0\n" + "push $8\n" /* Push CS */ + "lea 1f(%%rip), %%rax\n" /* Load 1 label address into RAX */ + "push %%rax\n" /* Push the return address (label 1) */ + "lretq\n" /* Far return to update CS */ + "1:\n" + " mov $0x10, %%eax\n" + " mov %%eax, %%ds\n" + " mov %%eax, %%es\n" + " mov %%eax, %%fs\n" + " mov %%eax, %%gs\n" + " mov %%eax, %%ss\n" + : + : "m" (*gdtr) + : "rax", "memory" + ); +} + +extern struct gdt_entry g_dmmy_gdt[256]; +extern struct gdtr g_early_gdtr; + +#endif /* !AMD64_GDT_H_ */ diff --git a/sys/include/arch/amd64/idt.h b/sys/include/arch/amd64/idt.h new file mode 100644 index 0000000..d3b623d --- /dev/null +++ b/sys/include/arch/amd64/idt.h @@ -0,0 +1,72 @@ +/* + * 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. + */ + +/* $Id$ */ + +#ifndef _AMD64_IDT_H_ +#define _AMD64_IDT_H_ + +#include <sys/types.h> +#include <sys/cdefs.h> + +#define LIDT(idtr) __ASMV("lidt %0" \ + :: "m" (idtr)) + +#define IDT_TRAP_GATE_FLAGS 0x8F +#define IDT_INT_GATE_FLAGS 0x8E +#define IDT_INT_GATE_USER 0xEE + +/* + * AMD64 Interrupt Gate Descriptor. + */ +struct idt_entry { + uint16_t off_lo; /* Low 16 bits of ISR offset */ + uint16_t segsel; /* Segment selector, hardcode to kernel CS */ + uint8_t ist : 2; /* Interrupt stack table */ + uint8_t zero : 1; /* Unused: keep zero */ + uint8_t zero1 : 4; /* Unused: keep zero */ + uint8_t type : 4; /* Gate type */ + uint8_t zero2 : 1; /* Unused: keep zero */ + uint8_t dpl : 2; /* Descriptor privilege level */ + uint8_t p : 1; /* Present (keep 1 to mark as valid) */ + uint16_t off_mid; /* Middle 16 bits of ISR offset */ + uint32_t off_hi; /* High 32-bits of ISR offset */ + uint32_t reserved; /* Reserved: keep zero */ +}; + +struct __packed idtr { + uint16_t limit; + uintptr_t offset; +}; + + +void idt_set_desc(uint8_t vec, uint8_t type, uintptr_t isr, uint8_t ist); +void idt_load(void); + +#endif /* !_AMD64_IDT_H_ */ diff --git a/sys/include/arch/amd64/trap.h b/sys/include/arch/amd64/trap.h new file mode 100644 index 0000000..e72ae11 --- /dev/null +++ b/sys/include/arch/amd64/trap.h @@ -0,0 +1,78 @@ +/* + * 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. + */ + +/* $Id$ */ + +#ifndef _AMD64_TRAP_H_ +#define _AMD64_TRAP_H_ + +#if !defined(__ASSEMBLER__) +#include <sys/types.h> +#include <machine/frame.h> +#endif /* !defined(__ASSEMBLER__) */ + +#define TRAP_BREAKPOINT 0 /* Breakpoint */ +#define TRAP_ARITH_ERR 1 /* Arithmetic error (e.g division by 0) */ +#define TRAP_OVERFLOW 2 /* Overflow */ +#define TRAP_BOUND_RANGE 3 /* BOUND range exceeded */ +#define TRAP_INVLOP 4 /* Invalid opcode */ +#define TRAP_DOUBLE_FAULT 5 /* Double fault */ +#define TRAP_INVLTSS 6 /* Invalid TSS */ +#define TRAP_SEGNP 7 /* Segment not present */ +#define TRAP_PROTFLT 8 /* General protection */ +#define TRAP_PAGEFLT 9 /* Page fault */ +#define TRAP_NMI 10 /* Non-maskable interrupt */ + +/* Trap is coming from user mode */ +#define TRAP_USER 0x100 + +#if !defined(__ASSEMBLER__) +typedef void(*ftrap_handler_t)(void); + +void breakpoint_handler(void *sf); +void arith_err(void *sf); +void overflow(void *sf); +void bound_range(void *sf); +void invl_op(void *sf); +void double_fault(void *sf); +void invl_tss(void *sf); +void segnp(void *sf); +void general_prot(void *sf); +void page_fault(void *sf); +void nmi(void *sf); +void register_ftrap_handler(ftrap_handler_t handler); +void trap_handler(struct trapframe *tf); +#else +.macro handle_trap + mov %rsp, %rdi + call trap_handler +.endm +#endif /* !defined(__ASSEMBLER__) */ + +#endif /* !_AMD64_TRAP_H_ */ |