[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/arch/arm/arm-m/systick/systick.c b/src/bsp/lk/arch/arm/arm-m/systick/systick.c
new file mode 100644
index 0000000..b4fdda5
--- /dev/null
+++ b/src/bsp/lk/arch/arm/arm-m/systick/systick.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2012-2014 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * Generic systick timer support for providing system time (current_time(), current_time_hires()),
+ * and a monotonic timer for the kernel.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <debug.h>
+#include <assert.h>
+#include <trace.h>
+#include <err.h>
+#include <kernel/thread.h>
+#include <arch/arm.h>
+#include <arch/arm/cm.h>
+#include <platform.h>
+#include <platform/timer.h>
+
+#define LOCAL_TRACE 0
+
+static volatile uint64_t ticks;
+static uint32_t tick_rate = 0;
+static uint32_t tick_rate_mhz = 0;
+static lk_time_t tick_interval_ms;
+static lk_bigtime_t tick_interval_us;
+
+static platform_timer_callback cb;
+static void *cb_args;
+
+static void arm_cm_systick_set_periodic(lk_time_t period)
+{
+    LTRACEF("clk_freq %u, period %u\n", tick_rate, (uint)period);
+
+    uint32_t ticks = tick_rate / (1000 / period);
+    LTRACEF("ticks %d\n", ticks);
+
+    SysTick->LOAD = (ticks & SysTick_LOAD_RELOAD_Msk) - 1;
+    SysTick->VAL = 0;
+    SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk;
+}
+
+static void arm_cm_systick_cancel_periodic(void)
+{
+    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
+}
+
+/* main systick irq handler */
+void _systick(void)
+{
+    ticks++;
+
+    arm_cm_irq_entry();
+
+    bool resched = false;
+    if (cb) {
+        lk_time_t now = current_time();
+        if (cb(cb_args, now) == INT_RESCHEDULE)
+            resched = true;
+    }
+
+    arm_cm_irq_exit(resched);
+}
+
+status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, lk_time_t interval)
+{
+    LTRACEF("callback %p, arg %p, interval %u\n", callback, arg, interval);
+
+    DEBUG_ASSERT(tick_rate != 0 && tick_rate_mhz != 0);
+
+    cb = callback;
+    cb_args = arg;
+
+    tick_interval_ms = interval;
+    tick_interval_us = interval * 1000;
+    arm_cm_systick_set_periodic(interval);
+
+    return NO_ERROR;
+}
+
+lk_time_t current_time(void)
+{
+    uint32_t reload = SysTick->LOAD  & SysTick_LOAD_RELOAD_Msk;
+
+    uint64_t t;
+    uint32_t delta;
+    do {
+        t = ticks;
+        delta = (volatile uint32_t)SysTick->VAL;
+        DMB;
+    } while (ticks != t);
+
+    /* convert ticks to msec */
+    delta = (reload - delta) / (tick_rate_mhz * 1000);
+    lk_time_t res = (t * tick_interval_ms) + delta;
+
+    return res;
+}
+
+lk_bigtime_t current_time_hires(void)
+{
+    uint32_t reload = SysTick->LOAD  & SysTick_LOAD_RELOAD_Msk;
+
+    uint64_t t;
+    uint32_t delta;
+    do {
+        t = ticks;
+        delta = (volatile uint32_t)SysTick->VAL;
+        DMB;
+    } while (ticks != t);
+
+    /* convert ticks to usec */
+    delta = (reload - delta) / tick_rate_mhz;
+    lk_bigtime_t res = (t * tick_interval_us) + delta;
+
+    return res;
+}
+
+void arm_cm_systick_init(uint32_t mhz)
+{
+    tick_rate = mhz;
+    tick_rate_mhz = mhz / 1000000;
+}