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提交 1a43a88b 创建 作者: Silas Boyd-Wickizer's avatar Silas Boyd-Wickizer
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Automatic EOI doesn't work on tom. Add piceoi.

上级 789a5877
隐藏空白字符变更
内嵌 并排
正在显示 包含 21 行增加 和 5 行删除
Makefile
浏览文件 @ 1a43a88b
...@@ -100,7 +100,7 @@ fs.img: mkfs README $(UPROGS) ...@@ -100,7 +100,7 @@ fs.img: mkfs README $(UPROGS)
clean: clean:
rm -f *.o *.d *.asm *.sym initcode kernel bootother mkfs fs.img rm -f *.o *.d *.asm *.sym initcode kernel bootother mkfs fs.img
QEMUOPTS = -smp $(CPUS) -m 512 -nographic QEMUOPTS = -smp $(CPUS) -m 512
qemu: kernel qemu: kernel
$(QEMU) $(QEMUOPTS) -kernel kernel $(QEMU) $(QEMUOPTS) -kernel kernel
gdb: kernel gdb: kernel
......
kernel.h
浏览文件 @ 1a43a88b
...@@ -155,6 +155,7 @@ void* ns_enumerate_key(struct ns *ns, struct nskey key, void *(*f)(voi ...@@ -155,6 +155,7 @@ void* ns_enumerate_key(struct ns *ns, struct nskey key, void *(*f)(voi
// picirq.c // picirq.c
void picenable(int); void picenable(int);
void piceoi(void);
// pipe.c // pipe.c
int pipealloc(struct file**, struct file**); int pipealloc(struct file**, struct file**);
......
picirq.c
浏览文件 @ 1a43a88b
...@@ -28,6 +28,18 @@ picenable(int irq) ...@@ -28,6 +28,18 @@ picenable(int irq)
picsetmask(irqmask & ~(1<<irq)); picsetmask(irqmask & ~(1<<irq));
} }
void
piceoi(void)
{
// OCW2: rse00xxx
// r: rotate
// s: specific
// e: end-of-interrupt
// xxx: specific interrupt line
outb(IO_PIC1, 0x20);
outb(IO_PIC2, 0x20);
}
// Initialize the 8259A interrupt controllers. // Initialize the 8259A interrupt controllers.
void void
initpic(void) initpic(void)
...@@ -59,15 +71,15 @@ initpic(void) ...@@ -59,15 +71,15 @@ initpic(void)
// can be hardwired). // can be hardwired).
// a: 1 = Automatic EOI mode // a: 1 = Automatic EOI mode
// p: 0 = MCS-80/85 mode, 1 = intel x86 mode // p: 0 = MCS-80/85 mode, 1 = intel x86 mode
outb(IO_PIC1+1, 0x3); outb(IO_PIC1+1, 0x1);
// Set up slave (8259A-2) // Set up slave (8259A-2)
outb(IO_PIC2, 0x11); // ICW1 outb(IO_PIC2, 0x11); // ICW1
outb(IO_PIC2+1, T_IRQ0 + 8); // ICW2 outb(IO_PIC2+1, T_IRQ0 + 8); // ICW2
outb(IO_PIC2+1, IRQ_SLAVE); // ICW3 outb(IO_PIC2+1, IRQ_SLAVE); // ICW3
// NB Automatic EOI mode doesn't tend to work on the slave. // NB Automatic EOI mode doesn't tend to work on the slave.
// Linux source code says it's "to be investigated". // Linux source code says it's "to be investigated".
outb(IO_PIC2+1, 0x3); // ICW4 outb(IO_PIC2+1, 0x1); // ICW4
// OCW3: 0ef01prs // OCW3: 0ef01prs
// ef: 0x = NOP, 10 = clear specific mask, 11 = set specific mask // ef: 0x = NOP, 10 = clear specific mask, 11 = set specific mask
......
trap.c
浏览文件 @ 1a43a88b
...@@ -82,6 +82,7 @@ trap(struct trapframe *tf) ...@@ -82,6 +82,7 @@ trap(struct trapframe *tf)
case T_IRQ0 + IRQ_IDE: case T_IRQ0 + IRQ_IDE:
ideintr(); ideintr();
lapiceoi(); lapiceoi();
piceoi();
break; break;
case T_IRQ0 + IRQ_IDE+1: case T_IRQ0 + IRQ_IDE+1:
// Bochs generates spurious IDE1 interrupts. // Bochs generates spurious IDE1 interrupts.
...@@ -89,14 +90,16 @@ trap(struct trapframe *tf) ...@@ -89,14 +90,16 @@ trap(struct trapframe *tf)
case T_IRQ0 + IRQ_KBD: case T_IRQ0 + IRQ_KBD:
kbdintr(); kbdintr();
lapiceoi(); lapiceoi();
piceoi();
break; break;
case T_IRQ0 + IRQ_COM1: case T_IRQ0 + IRQ_COM1:
uartintr(); uartintr();
lapiceoi(); lapiceoi();
piceoi();
break; break;
case T_IRQ0 + 7: case T_IRQ0 + 7:
case T_IRQ0 + IRQ_SPURIOUS: case T_IRQ0 + IRQ_SPURIOUS:
cprintf("cpu%d: spurious interrupt at %x:%x\n", cprintf("cpu%d: spurious interrupt at %x:%lx\n",
mycpu()->id, tf->cs, tf->rip); mycpu()->id, tf->cs, tf->rip);
lapiceoi(); lapiceoi();
case T_TLBFLUSH: case T_TLBFLUSH:
......
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