d0f7acf9eb
An x86-64 operating system built from xv6, now largely rewritten: SMP, a copy-on-write root filesystem (SchFS), PCI/USB/virtio drivers, a TTF rasteriser, and a Linux-numbered syscall ABI. No history before this point -- the tree was never under version control. This commit exists so the rename that follows has something to undo to.
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#pragma once
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// x86 trap and interrupt constants.
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// Processor-defined exceptions:
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#define T_DIVIDE 0 // divide error
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#define T_DEBUG 1 // debug exception
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#define T_NMI 2 // non-maskable interrupt
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#define T_BRKPT 3 // breakpoint
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#define T_OFLOW 4 // overflow
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#define T_BOUND 5 // bounds check
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#define T_ILLOP 6 // illegal opcode
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#define T_DEVICE 7 // device not available
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#define T_DBLFLT 8 // double fault
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#define T_TSS 10 // invalid task switch segment
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#define T_SEGNP 11 // segment not present
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#define T_STACK 12 // stack exception
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#define T_GPFLT 13 // general protection fault
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#define T_PGFLT 14 // page fault
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#define T_FPERR 16 // floating point error
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#define T_ALIGN 17 // aligment check
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#define T_MCHK 18 // machine check
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#define T_SIMDERR 19 // SIMD floating point error
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// IRQ offsets
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#define T_IRQ0 32 // IRQ 0 corresponds to int T_IRQ
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#define IRQ_TIMER 0
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#define IRQ_KBD 1
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#define IRQ_COM1 4
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#define IRQ_MOUSE 12
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#define IRQ_IDE 14
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#define IRQ_ERROR 19
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#define IRQ_SPURIOUS 31
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// System call interrupt number for legacy int 0x40 or 0x80 if used
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// although syscall/sysret is preferred for x64
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#define T_SYSCALL 0x40
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#ifndef __ASSEMBLER__
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struct trapframe {
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// Registers saved by trapasm.S
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uint64 rax;
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uint64 rbx;
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uint64 rcx;
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uint64 rdx;
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uint64 rbp;
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uint64 rsi;
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uint64 rdi;
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uint64 r8;
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uint64 r9;
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uint64 r10;
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uint64 r11;
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uint64 r12;
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uint64 r13;
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uint64 r14;
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uint64 r15;
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uint64 trapno;
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// Error code and info saved by hardware
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uint64 err;
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uint64 rip;
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uint64 cs;
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uint64 rflags;
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uint64 rsp;
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uint64 ss;
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};
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#endif
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