Permalink
Browse files

tab police

  • Loading branch information...
1 parent 2157383 commit 030a47736fbb0febddce2647e5a80b98ca409695 rsc committed May 31, 2009
Showing with 42 additions and 42 deletions.
  1. +1 −1 kill.c
  2. +1 −1 lapic.c
  3. +1 −1 proc.h
  4. +39 −39 uart.c
View
2 kill.c
@@ -6,7 +6,7 @@ int
main(int argc, char **argv)
{
int i;
-
+
if(argc < 1){
printf(2, "usage: kill pid...\n");
exit();
View
@@ -156,7 +156,7 @@ lapicstartap(uchar apicid, uint addr)
lapicw(ICRLO, INIT | LEVEL | ASSERT);
microdelay(200);
lapicw(ICRLO, INIT | LEVEL);
- microdelay(100); // should be 10ms, but too slow in Bochs!
+ microdelay(100); // should be 10ms, but too slow in Bochs!
// Send startup IPI (twice!) to enter bootstrap code.
// Regular hardware is supposed to only accept a STARTUP
View
2 proc.h
@@ -32,7 +32,7 @@ struct proc {
uint sz; // Size of process memory (bytes)
char *kstack; // Bottom of kernel stack for this process
enum proc_state state; // Process state
- int pid; // Process ID
+ volatile int pid; // Process ID
struct proc *parent; // Parent process
struct trapframe *tf; // Trap frame for current syscall
struct context *context; // Switch here to run process
View
78 uart.c
@@ -10,67 +10,67 @@
#include "proc.h"
#include "x86.h"
-#define COM1 0x3f8
+#define COM1 0x3f8
-static int uart; // is there a uart?
+static int uart; // is there a uart?
void
uartinit(void)
{
- char *p;
+ char *p;
- // Turn off the FIFO
- outb(COM1+2, 0);
-
- // 9600 baud, 8 data bits, 1 stop bit, parity off.
- outb(COM1+3, 0x80); // Unlock divisor
- outb(COM1+0, 115200/9600);
- outb(COM1+1, 0);
- outb(COM1+3, 0x03); // Lock divisor, 8 data bits.
- outb(COM1+4, 0);
- outb(COM1+1, 0x01); // Enable receive interrupts.
+ // Turn off the FIFO
+ outb(COM1+2, 0);
+
+ // 9600 baud, 8 data bits, 1 stop bit, parity off.
+ outb(COM1+3, 0x80); // Unlock divisor
+ outb(COM1+0, 115200/9600);
+ outb(COM1+1, 0);
+ outb(COM1+3, 0x03); // Lock divisor, 8 data bits.
+ outb(COM1+4, 0);
+ outb(COM1+1, 0x01); // Enable receive interrupts.
- // If status is 0xFF, no serial port.
- if(inb(COM1+5) == 0xFF)
- return;
- uart = 1;
+ // If status is 0xFF, no serial port.
+ if(inb(COM1+5) == 0xFF)
+ return;
+ uart = 1;
- // Acknowledge pre-existing interrupt conditions;
- // enable interrupts.
- inb(COM1+2);
- inb(COM1+0);
- picenable(IRQ_COM1);
- ioapicenable(IRQ_COM1, 0);
-
- // Announce that we're here.
- for(p="xv6...\n"; *p; p++)
- uartputc(*p);
+ // Acknowledge pre-existing interrupt conditions;
+ // enable interrupts.
+ inb(COM1+2);
+ inb(COM1+0);
+ picenable(IRQ_COM1);
+ ioapicenable(IRQ_COM1, 0);
+
+ // Announce that we're here.
+ for(p="xv6...\n"; *p; p++)
+ uartputc(*p);
}
void
uartputc(int c)
{
- int i;
+ int i;
- if(!uart)
- return;
- for(i = 0; i < 128 && !(inb(COM1+5) & 0x20); i++)
- microdelay(10);
- outb(COM1+0, c);
+ if(!uart)
+ return;
+ for(i = 0; i < 128 && !(inb(COM1+5) & 0x20); i++)
+ microdelay(10);
+ outb(COM1+0, c);
}
static int
uartgetc(void)
{
- if(!uart)
- return -1;
- if(!(inb(COM1+5) & 0x01))
- return -1;
- return inb(COM1+0);
+ if(!uart)
+ return -1;
+ if(!(inb(COM1+5) & 0x01))
+ return -1;
+ return inb(COM1+0);
}
void
uartintr(void)
{
- consoleintr(uartgetc);
+ consoleintr(uartgetc);
}

0 comments on commit 030a477

Please sign in to comment.