Imbus/xv6-riscv-kernel
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s/IRQ_OFFSET/T_IRQ0/: it's a trap number, not an irq number.

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move the SYSCALL number up, so does not overlap the IRQ traps.
This commit is contained in:
Russ Cox 2009-07-11 18:17:32 -07:00
parent 27ff8f0e6f
commit 8b75366ce4
2 changed files with 10 additions and 9 deletions
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14
trap.c
View file

@ -45,7 +45,7 @@ trap(struct trapframe *tf)
}
switch(tf->trapno){
case IRQ_OFFSET + IRQ_TIMER:
case T_IRQ0 + IRQ_TIMER:
if(cpu() == 0){
acquire(&tickslock);
ticks++;
@ -54,20 +54,20 @@ trap(struct trapframe *tf)
}
lapiceoi();
break;
case IRQ_OFFSET + IRQ_IDE:
case T_IRQ0 + IRQ_IDE:
ideintr();
lapiceoi();
break;
case IRQ_OFFSET + IRQ_KBD:
case T_IRQ0 + IRQ_KBD:
kbdintr();
lapiceoi();
break;
case IRQ_OFFSET + IRQ_COM1:
case T_IRQ0 + IRQ_COM1:
uartintr();
lapiceoi();
break;
case IRQ_OFFSET + 7:
case IRQ_OFFSET + IRQ_SPURIOUS:
case T_IRQ0 + 7:
case T_IRQ0 + IRQ_SPURIOUS:
cprintf("cpu%d: spurious interrupt at %x:%x\n",
cpu(), tf->cs, tf->eip);
lapiceoi();
@ -94,7 +94,7 @@ trap(struct trapframe *tf)
// Force process to give up CPU on clock tick.
// If interrupts were on while locks held, would need to check nlock.
if(cp && cp->state == RUNNING && tf->trapno == IRQ_OFFSET+IRQ_TIMER)
if(cp && cp->state == RUNNING && tf->trapno == T_IRQ0+IRQ_TIMER)
yield();
// Check if the process has been killed since we yielded

5
traps.h
View file

@ -24,10 +24,10 @@
// These are arbitrarily chosen, but with care not to overlap
// processor defined exceptions or interrupt vectors.
#define T_SYSCALL 48 // system call
#define T_SYSCALL 64 // system call
#define T_DEFAULT 500 // catchall
#define IRQ_OFFSET 32 // IRQ 0 corresponds to int IRQ_OFFSET
#define T_IRQ0 32 // IRQ 0 corresponds to int T_IRQ
#define IRQ_TIMER 0
#define IRQ_KBD 1
@ -35,3 +35,4 @@
#define IRQ_IDE 14
#define IRQ_ERROR 19
#define IRQ_SPURIOUS 31