ilo-pona/xv6-65oo2
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more named constants

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rsc 2006-09-06 17:54:29 +00:00
parent 799c9176bc
commit 96d467b3a9
1 changed files with 10 additions and 6 deletions
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16
ide.c
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@ -9,10 +9,13 @@
#include "traps.h" #include "traps.h"
#include "spinlock.h" #include "spinlock.h"
#define IDE_BSY 0x80 #define IDE_BSY 0x80
#define IDE_DRDY 0x40 #define IDE_DRDY 0x40
#define IDE_DF 0x20 #define IDE_DF 0x20
#define IDE_ERR 0x01 #define IDE_ERR 0x01
#define IDE_CMD_READ 0x20
#define IDE_CMD_WRITE 0x30
struct ide_request { struct ide_request {
int diskno; int diskno;
@ -95,9 +98,10 @@ ide_start_request (void)
outb(0x1F4, (r->secno >> 8) & 0xFF); outb(0x1F4, (r->secno >> 8) & 0xFF);
outb(0x1F5, (r->secno >> 16) & 0xFF); outb(0x1F5, (r->secno >> 16) & 0xFF);
outb(0x1F6, 0xE0 | ((r->diskno&1)<<4) | ((r->secno>>24)&0x0F)); outb(0x1F6, 0xE0 | ((r->diskno&1)<<4) | ((r->secno>>24)&0x0F));
if(r->read) outb(0x1F7, 0x20); // read if(r->read)
outb(0x1F7, IDE_CMD_READ);
else { else {
outb(0x1F7, 0x30); // write outb(0x1F7, IDE_CMD_WRITE);
outsl(0x1F0, r->addr, 512/4); outsl(0x1F0, r->addr, 512/4);
} }
} }