a1c965da1e
Sixty-five headers sat side by side in include/, so `#include "irq.h"` said nothing about where irq.h was or what it belonged to, and errno.h, stat.h and fcntl.h at the top shadowed the system's for any host tool built with -I./include. They are in folders now -- arch/ core/ fs/ dev/ gfx/ net/ uapi/ (and ldls/ for the Linux driver layer) -- and every include names the folder, as Linux's do: "core/proc.h". Done mechanically and checked the hard way: the kernel built from this tree disassembles identically to the one built from the tree before it. The full image boots, and userland is the same set of programs. Paths in docs and comments follow; docs/guides/layout.md has a table of what is where, and tools/fix-includes.py rewrites old-style includes from the folders in the tree, for code written before this. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
71 lines
2 KiB
C
71 lines
2 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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// 30, not xv6's 19. Vector T_IRQ0+19 is IOAPIC pin 19, which real chipsets
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// use for PCI; the LAPIC error interrupt would have shared it.
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#define IRQ_ERROR 30
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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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