read the disk using interrupts

1 files changed, 12 insertions, 7 deletions

diff --git a/ide.c b/ide.c
index e870628..12e8af4 100644
--- a/ide.c
+++ b/ide.c
@@ -17,6 +17,7 @@
 #define IDE_ERR		0x01
 
 static int diskno = 0;
+int disk_channel;
 
 static int
 ide_wait_ready(int check_error)
@@ -43,6 +44,7 @@ void
 ide_intr(void)
 {
   cprintf("ide_intr\n");
+  wakeup(&disk_channel);
 }
 
 
@@ -78,12 +80,10 @@ ide_set_disk(int d)
 }
 
 int
-ide_read(uint32_t secno, void *dst, unsigned nsecs)
+ide_start_read(uint32_t secno, void *dst, unsigned nsecs)
 {
-  int r;
-
   if(nsecs > 256)
-    panic("ide_read");
+    panic("ide_start_read: nsecs too large");
 
   ide_wait_ready(0);
 
@@ -95,14 +95,19 @@ ide_read(uint32_t secno, void *dst, unsigned nsecs)
   outb(0x1F6, 0xE0 | ((diskno&1)<<4) | ((secno>>24)&0x0F));
   outb(0x1F7, 0x20);	// CMD 0x20 means read sector
 
-#if 0
+  return 0;
+}
+
+int
+ide_read(uint32_t secno, void *dst, unsigned nsecs)
+{
+  int r;
+
   for (; nsecs > 0; nsecs--, dst += 512) {
     if ((r = ide_wait_ready(1)) < 0)
       return r;
     insl(0x1F0, dst, 512/4);
   }
-#endif
-
   return 0;
 }