81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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#ifndef JOS_INC_TRAP_H
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#define JOS_INC_TRAP_H
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// Trap numbers
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// These are processor defined:
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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_COPROC 9 */ // reserved (not generated by recent processors)
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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_RES 15 */ // reserved
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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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// These are arbitrarily chosen, but with care not to overlap
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// processor defined exceptions or interrupt vectors.
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#define T_SYSCALL 48 // system call
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#define T_DEFAULT 500 // catchall
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#define IRQ_OFFSET 32 // IRQ 0 corresponds to int IRQ_OFFSET
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// Hardware IRQ numbers. We receive these as (IRQ_OFFSET+IRQ_WHATEVER)
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#define IRQ_TIMER 0
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#define IRQ_KBD 1
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#define IRQ_SERIAL 4
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#define IRQ_SPURIOUS 7
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#define IRQ_IDE 14
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#define IRQ_ERROR 19
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#ifndef __ASSEMBLER__
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#include <inc/types.h>
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struct PushRegs {
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/* registers as pushed by pusha */
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uint32_t reg_edi;
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uint32_t reg_esi;
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uint32_t reg_ebp;
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uint32_t reg_oesp; /* Useless */
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uint32_t reg_ebx;
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uint32_t reg_edx;
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uint32_t reg_ecx;
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uint32_t reg_eax;
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} __attribute__((packed));
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struct Trapframe {
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struct PushRegs tf_regs;
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uint16_t tf_es;
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uint16_t tf_padding1;
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uint16_t tf_ds;
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uint16_t tf_padding2;
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uint32_t tf_trapno;
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/* below here defined by x86 hardware */
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uint32_t tf_err;
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uintptr_t tf_eip;
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uint16_t tf_cs;
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uint16_t tf_padding3;
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uint32_t tf_eflags;
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/* below here only when crossing rings, such as from user to kernel */
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uintptr_t tf_esp;
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uint16_t tf_ss;
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uint16_t tf_padding4;
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} __attribute__((packed));
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#endif /* !__ASSEMBLER__ */
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#endif /* !JOS_INC_TRAP_H */
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