tpm: add dictionary attack mitigation commands support

[J-u-boot.git] / lib / time.c

diff --git a/lib/time.c b/lib/time.c
index 69edc3d39b2563a367e03b2e410d4946fe3b0ca6..3bf678a23278db79e523e5fe1cb9db933d19ecd3 100644 (file)
--- a/lib/time.c
+++ b/lib/time.c
@@ -1,33 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2009
  * Wolfgang Denk, DENX Software Engineering, [email protected].
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
  */
 
 #include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <timer.h>
 #include <watchdog.h>
+#include <div64.h>
+#include <asm/io.h>
 
 #ifndef CONFIG_WD_PERIOD
-# define CONFIG_WD_PERIOD      (10 * 1000 * 1000)      /* 10 seconds default*/
+# define CONFIG_WD_PERIOD      (10 * 1000 * 1000)      /* 10 seconds default */
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SYS_TIMER_RATE
+/* Returns tick rate in ticks per second */
+ulong notrace get_tbclk(void)
+{
+       return CONFIG_SYS_TIMER_RATE;
+}
+#endif
+
+#ifdef CONFIG_SYS_TIMER_COUNTER
+unsigned long notrace timer_read_counter(void)
+{
+#ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
+       return ~readl(CONFIG_SYS_TIMER_COUNTER);
+#else
+       return readl(CONFIG_SYS_TIMER_COUNTER);
+#endif
+}
+
+ulong timer_get_boot_us(void)
+{
+       ulong count = timer_read_counter();
+
+#if CONFIG_SYS_TIMER_RATE == 1000000
+       return count;
+#elif CONFIG_SYS_TIMER_RATE > 1000000
+       return lldiv(count, CONFIG_SYS_TIMER_RATE / 1000000);
+#elif defined(CONFIG_SYS_TIMER_RATE)
+       return (unsigned long long)count * 1000000 / CONFIG_SYS_TIMER_RATE;
+#else
+       /* Assume the counter is in microseconds */
+       return count;
+#endif
+}
+
+#else
+extern unsigned long __weak timer_read_counter(void);
+#endif
+
+#ifdef CONFIG_TIMER
+ulong notrace get_tbclk(void)
+{
+       if (!gd->timer) {
+#ifdef CONFIG_TIMER_EARLY
+               return timer_early_get_rate();
+#else
+               int ret;
+
+               ret = dm_timer_init();
+               if (ret)
+                       return ret;
+#endif
+       }
+
+       return timer_get_rate(gd->timer);
+}
+
+uint64_t notrace get_ticks(void)
+{
+       u64 count;
+       int ret;
+
+       if (!gd->timer) {
+#ifdef CONFIG_TIMER_EARLY
+               return timer_early_get_count();
+#else
+               int ret;
+
+               ret = dm_timer_init();
+               if (ret)
+                       return ret;
+#endif
+       }
+
+       ret = timer_get_count(gd->timer, &count);
+       if (ret)
+               return ret;
+
+       return count;
+}
+
+#else /* !CONFIG_TIMER */
+
+uint64_t __weak notrace get_ticks(void)
+{
+       unsigned long now = timer_read_counter();
+
+       /* increment tbu if tbl has rolled over */
+       if (now < gd->timebase_l)
+               gd->timebase_h++;
+       gd->timebase_l = now;
+       return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
+}
+
+#endif /* CONFIG_TIMER */
+
+/* Returns time in milliseconds */
+static uint64_t notrace tick_to_time(uint64_t tick)
+{
+       ulong div = get_tbclk();
+
+       tick *= CONFIG_SYS_HZ;
+       do_div(tick, div);
+       return tick;
+}
+
+int __weak timer_init(void)
+{
+       return 0;
+}
+
+/* Returns time in milliseconds */
+ulong __weak get_timer(ulong base)
+{
+       return tick_to_time(get_ticks()) - base;
+}
+
+unsigned long __weak notrace timer_get_us(void)
+{
+       return tick_to_time(get_ticks() * 1000);
+}
+
+static uint64_t usec_to_tick(unsigned long usec)
+{
+       uint64_t tick = usec;
+       tick *= get_tbclk();
+       do_div(tick, 1000000);
+       return tick;
+}
+
+void __weak __udelay(unsigned long usec)
+{
+       uint64_t tmp;
+
+       tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
+
+       while (get_ticks() < tmp+1)     /* loop till event */
+                /*NOP*/;
+}
+
 /* ------------------------------------------------------------------------- */
 
 void udelay(unsigned long usec)
@@ -41,26 +170,3 @@ void udelay(unsigned long usec)
                usec -= kv;
        } while(usec);
 }
-
-void mdelay(unsigned long msec)
-{
-       while (msec--)
-               udelay(1000);
-}
-
-ulong __timer_get_boot_us(void)
-{
-       static ulong base_time;
-
-       /*
-        * We can't implement this properly. Return 0 on the first call and
-        * larger values after that.
-        */
-       if (base_time)
-               return get_timer(base_time) * 1000;
-       base_time = get_timer(0);
-       return 0;
-}
-
-ulong timer_get_boot_us(void)
-       __attribute__((weak, alias("__timer_get_boot_us")));