Improve the speed of hard disk reading

Machine hard disk and SSD are ok.

Change-Id: I4e55e37747c51b34ff02dacc441d4c30feb0efd0

sys/dev/pci/ahcisata.c

@@ -516,7 +516,7 @@ static int waiting_for_cmd_completed(volatile u8 * offset,
 	u32 status;
 
 	for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
-		msleep(1);
+		;
 
 	return (i < timeout_msec) ? 0 : -1;
 }
@@ -742,14 +742,14 @@ static int get_ahci_device_data(u8 port, u8 * fis, int fis_len, u8 * buf,
         printf("AHCI SATA error: CI is set when START is zero!\n");
     };
 	writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
-	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 2000, 0x1)) {
+	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 2000000, 0x1)) {
 		printf("%s <line%d>: timeout exit! %d bytes transferred.\n", __func__, __LINE__,
 		       pp->cmd_slot->status);
 
         printf("PxIS: 0x%08x, PxSERR: 0x%08x\n", readl(port_mmio + PORT_IRQ_STAT), readl(port_mmio + PORT_SCR_ERR));
         printf("PxTFD: 0x%08x, PxSSTS: 0x%08x\n", readl(port_mmio + PORT_TFDATA), readl(port_mmio + PORT_SCR_STAT));
 
-	    if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 2000, 0x1)) {
+	    if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 2000000, 0x1)) {
             printf("Waiting another 2s is useless.\n");
         }else{
             printf("Waiting another 2s is usefull.\n");