pc-bios: s390x: Consolidate timing functions into time.h

Let's consolidate timing related functions into one header.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200624075226.92728-3-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

pc-bios/s390-ccw/menu.c

@@ -12,6 +12,7 @@
 #include "libc.h"
 #include "s390-ccw.h"
 #include "sclp.h"
+#include "s390-time.h"
 
 #define KEYCODE_NO_INP '\0'
 #define KEYCODE_ESCAPE '\033'

pc-bios/s390-ccw/netmain.c

@@ -35,6 +35,7 @@
 #include "s390-ccw.h"
 #include "cio.h"
 #include "virtio.h"
+#include "s390-time.h"
 
 #define DEFAULT_BOOT_RETRIES 10
 #define DEFAULT_TFTP_RETRIES 20
@@ -57,24 +58,14 @@ static SubChannelId net_schid = { .one = 1 };
 static uint8_t mac[6];
 static uint64_t dest_timer;
 
-static uint64_t get_timer_ms(void)
-{
-    uint64_t clk;
-
-    asm volatile(" stck %0 " : : "Q"(clk) : "memory");
-
-    /* Bit 51 is incremented each microsecond */
-    return (clk >> (63 - 51)) / 1000;
-}
-
 void set_timer(int val)
 {
-    dest_timer = get_timer_ms() + val;
+    dest_timer = get_time_ms() + val;
 }
 
 int get_timer(void)
 {
-    return dest_timer - get_timer_ms();
+    return dest_timer - get_time_ms();
 }
 
 int get_sec_ticks(void)

pc-bios/s390-ccw/s390-ccw.h

@@ -74,8 +74,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
 bool virtio_is_supported(SubChannelId schid);
 void virtio_blk_setup_device(SubChannelId schid);
 int virtio_read(ulong sector, void *load_addr);
-u64 get_clock(void);
-ulong get_second(void);
 
 /* bootmap.c */
 void zipl_load(void);
@@ -153,11 +151,13 @@ static inline void yield(void)
 
 #define MAX_SECTOR_SIZE 4096
 
+#include "s390-time.h"
+
 static inline void sleep(unsigned int seconds)
 {
-    ulong target = get_second() + seconds;
+    ulong target = get_time_seconds() + seconds;
 
-    while (get_second() < target) {
+    while (get_time_seconds() < target) {
         yield();
     }
 }

pc-bios/s390-ccw/s390-time.h

@@ -0,0 +1,23 @@
+#ifndef TIME_H
+#define TIME_H
+
+static inline u64 get_clock(void)
+{
+    u64 r;
+
+    asm volatile("stck %0" : "=Q" (r) : : "cc");
+    return r;
+}
+
+static inline u64 get_time_ms(void)
+{
+    /* Bit 51 is incremented each microsecond */
+    return (get_clock() >> 12) / 1000;
+}
+
+static inline u64 get_time_seconds(void)
+{
+    return get_time_ms() / 1000;
+}
+
+#endif

pc-bios/s390-ccw/virtio-net.c

@@ -19,6 +19,7 @@
 #include <ethernet.h>
 #include "s390-ccw.h"
 #include "virtio.h"
+#include "s390-time.h"
 
 #ifndef DEBUG_VIRTIO_NET
 #define DEBUG_VIRTIO_NET 0

pc-bios/s390-ccw/virtio-scsi.c

@@ -14,6 +14,7 @@
 #include "virtio.h"
 #include "scsi.h"
 #include "virtio-scsi.h"
+#include "s390-time.h"
 
 static ScsiDevice default_scsi_device;
 static VirtioScsiCmdReq req;

pc-bios/s390-ccw/virtio.c

@@ -15,6 +15,7 @@
 #include "virtio-scsi.h"
 #include "bswap.h"
 #include "helper.h"
+#include "s390-time.h"
 
 #define VRING_WAIT_REPLY_TIMEOUT 30
 
@@ -157,19 +158,6 @@ void vring_send_buf(VRing *vr, void *p, int len, int flags)
     }
 }
 
-u64 get_clock(void)
-{
-    u64 r;
-
-    asm volatile("stck %0" : "=Q" (r) : : "cc");
-    return r;
-}
-
-ulong get_second(void)
-{
-    return (get_clock() >> 12) / 1000000;
-}
-
 int vr_poll(VRing *vr)
 {
     if (vr->used->idx == vr->used_idx) {
@@ -194,7 +182,7 @@ int vr_poll(VRing *vr)
  */
 int vring_wait_reply(void)
 {
-    ulong target_second = get_second() + vdev.wait_reply_timeout;
+    ulong target_second = get_time_seconds() + vdev.wait_reply_timeout;
 
     /* Wait for any queue to be updated by the host */
     do {
@@ -207,7 +195,7 @@ int vring_wait_reply(void)
         if (r) {
             return 0;
         }
-    } while (!vdev.wait_reply_timeout || (get_second() < target_second));
+    } while (!vdev.wait_reply_timeout || (get_time_seconds() < target_second));
 
     return 1;
 }