new file： ../../libcpu/risc-v/e310/trap.c

	add file that forget to submit before
	auto change timer mtimercmp register on the base of RT_TICK_PER_SECOND in rtconfig.h
	no flashing led
new file：   ../../src/idle.c
	recover old file

bsp/risc-v/platform/interrupt.h

-#define INT_TIMER0  48
+#ifndef __INTERRUPT_H__
+#define __INTERRUPT_H__
+#include <rthw.h>
+void rt_hw_interrupt_mask(int irq);
+void rt_hw_interrupt_unmask(int irq);
+rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector, void *param);
+void rt_hw_interrupt_init(void);
+rt_uint32_t rt_hw_interrupt_get_active(rt_uint32_t fiq_irq);
+void rt_hw_interrupt_ack(rt_uint32_t fiq_irq, rt_uint32_t id);
+rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
+        void *param, char *name);
+#endif

bsp/risc-v/platform/plic_driver.c

-// See LICENSE for license details.
-
-#include "sifive/devices/plic.h"
-#include "plic_driver.h"
-#include "platform.h"
-#include "encoding.h"
-#include <string.h>
-
-
-// Note that there are no assertions or bounds checking on these
-// parameter values.
-
-void volatile_memzero(uint8_t * base, unsigned int size)
-{
-  volatile uint8_t * ptr;
-  for (ptr = base; ptr < (base + size); ptr++){
-    *ptr = 0;
-  }
-}
-
-void PLIC_init (
-                plic_instance_t * this_plic,
-                uintptr_t         base_addr,
-                uint32_t num_sources,
-                uint32_t num_priorities
-                )
-{
-  
-  this_plic->base_addr = base_addr;
-  this_plic->num_sources = num_sources;
-  this_plic->num_priorities = num_priorities;
-  
-  // Disable all interrupts (don't assume that these registers are reset).
-  unsigned long hart_id = read_csr(mhartid);
-  volatile_memzero((uint8_t*) (this_plic->base_addr +
-                               PLIC_ENABLE_OFFSET +
-                               (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET)),
-                   (num_sources + 8) / 8);
-  
-  // Set all priorities to 0 (equal priority -- don't assume that these are reset).
-  volatile_memzero ((uint8_t *)(this_plic->base_addr +
-                                PLIC_PRIORITY_OFFSET),
-                    (num_sources + 1) << PLIC_PRIORITY_SHIFT_PER_SOURCE);
-
-  // Set the threshold to 0.
-  volatile plic_threshold* threshold = (plic_threshold*)
-    (this_plic->base_addr +
-     PLIC_THRESHOLD_OFFSET +
-     (hart_id << PLIC_THRESHOLD_SHIFT_PER_TARGET));
-
-  *threshold = 0;
-  
-}
-
-void PLIC_set_threshold (plic_instance_t * this_plic,
-			 plic_threshold threshold){
-
-  unsigned long hart_id = read_csr(mhartid);  
-  volatile plic_threshold* threshold_ptr = (plic_threshold*) (this_plic->base_addr +
-                                                              PLIC_THRESHOLD_OFFSET +
-                                                              (hart_id << PLIC_THRESHOLD_SHIFT_PER_TARGET));
-
-  *threshold_ptr = threshold;
-
-}
-  
-
-void PLIC_enable_interrupt (plic_instance_t * this_plic, plic_source source){
-
-  unsigned long hart_id = read_csr(mhartid);
-  volatile uint8_t * current_ptr = (volatile uint8_t *)(this_plic->base_addr +
-                                                        PLIC_ENABLE_OFFSET +
-                                                        (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET) +
-                                                        (source >> 3));
-  uint8_t current = *current_ptr;
-  current = current | ( 1 << (source & 0x7));
-  *current_ptr = current;
-
-}
-
-void PLIC_disable_interrupt (plic_instance_t * this_plic, plic_source source){
-  
-  unsigned long hart_id = read_csr(mhartid);
-  volatile uint8_t * current_ptr = (volatile uint8_t *) (this_plic->base_addr +
-                                                         PLIC_ENABLE_OFFSET +
-                                                         (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET) +
-                                                         (source >> 3));
-  uint8_t current = *current_ptr;
-  current = current & ~(( 1 << (source & 0x7)));
-  *current_ptr = current;
-  
-}
-
-void PLIC_set_priority (plic_instance_t * this_plic, plic_source source, plic_priority priority){
-
-  if (this_plic->num_priorities > 0) {
-    volatile plic_priority * priority_ptr = (volatile plic_priority *)
-      (this_plic->base_addr +
-       PLIC_PRIORITY_OFFSET +
-       (source << PLIC_PRIORITY_SHIFT_PER_SOURCE));
-    *priority_ptr = priority;
-  }
-}
-
-plic_source PLIC_claim_interrupt(plic_instance_t * this_plic){
-  
-  unsigned long hart_id = read_csr(mhartid);
-
-  volatile plic_source * claim_addr = (volatile plic_source * )
-    (this_plic->base_addr +
-     PLIC_CLAIM_OFFSET +
-     (hart_id << PLIC_CLAIM_SHIFT_PER_TARGET));
-
-  return  *claim_addr;
-  
-}
-
-void PLIC_complete_interrupt(plic_instance_t * this_plic, plic_source source){
-  
-  unsigned long hart_id = read_csr(mhartid);
-  volatile plic_source * claim_addr = (volatile plic_source *) (this_plic->base_addr +
-                                                                PLIC_CLAIM_OFFSET +
-                                                                (hart_id << PLIC_CLAIM_SHIFT_PER_TARGET));
-  *claim_addr = source;
-  
-}
-

libcpu/risc-v/e310/trap.c

+#include <rtthread.h>
+#include <rthw.h>
+#include <platform.h>
+#include <encoding.h>
+#include "interrupt.h"
+extern struct rt_irq_desc irq_desc[];
+extern rt_uint32_t rt_hw_interrupt_get_active(rt_uint32_t fiq_irq);
+void rt_hw_trap_irq()
+{
+    rt_isr_handler_t isr_func;
+    rt_uint32_t irq;
+    void *param;
+
+    /* get irq number */
+    irq = rt_hw_interrupt_get_active(0);
+
+    /* get interrupt service routine */
+    isr_func = irq_desc[irq].handler;
+    param = irq_desc[irq].param;
+
+    /* turn to interrupt service routine */
+    isr_func(irq, param);
+    rt_hw_interrupt_ack(0, irq);
+
+#ifdef RT_USING_INTERRUPT_INFO
+    irq_desc[irq].counter ++;
+#endif
+}
+void handle_m_ext_interrupt()
+{
+}
+void rt_systick_handler(void)
+{
+    clear_csr(mie, MIP_MTIP);
+
+    // Reset the timer for 3s in the future.
+    // This also clears the existing timer interrupt.
+
+    volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
+    volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
+    uint64_t now = *mtime;
+    uint64_t then = now + 2 * RTC_FREQ/RT_TICK_PER_SECOND;
+    *mtimecmp = then;
+    rt_tick_increase();
+
+    // read the current value of the LEDS and invert them.
+/*
+    GPIO_REG(GPIO_OUTPUT_VAL) ^= ((0x1 << RED_LED_OFFSET)   |
+		    (0x1 << GREEN_LED_OFFSET) |
+		    (0x1 << BLUE_LED_OFFSET));
+		    */
+
+    // Re-enable the timer interrupt.
+    set_csr(mie, MIP_MTIP);
+}

src/idle.c

+/*
+ * File      : idle.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
+ *
+ *  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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2006-03-23     Bernard      the first version
+ * 2010-11-10     Bernard      add cleanup callback function in thread exit.
+ * 2012-12-29     Bernard      fix compiling warning.
+ * 2013-12-21     Grissiom     let rt_thread_idle_excute loop until there is no
+ *                             dead thread.
+ * 2016-08-09     ArdaFu       add method to get the handler of the idle thread.
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#if defined (RT_USING_HOOK)
+#ifndef RT_USING_IDLE_HOOK
+#define RT_USING_IDLE_HOOK
+#endif
+#endif
+
+#ifndef IDLE_THREAD_STACK_SIZE
+#if defined (RT_USING_IDLE_HOOK) || defined(RT_USING_HEAP)
+#define IDLE_THREAD_STACK_SIZE  256
+#else
+#define IDLE_THREAD_STACK_SIZE  128
+#endif
+#endif
+
+static struct rt_thread idle;
+ALIGN(RT_ALIGN_SIZE)
+static rt_uint8_t rt_thread_stack[IDLE_THREAD_STACK_SIZE];
+
+extern rt_list_t rt_thread_defunct;
+
+#ifdef RT_USING_IDLE_HOOK
+static void (*rt_thread_idle_hook)();
+
+/**
+ * @ingroup Hook
+ * This function sets a hook function to idle thread loop. When the system performs 
+ * idle loop, this hook function should be invoked.
+ *
+ * @param hook the specified hook function
+ *
+ * @note the hook function must be simple and never be blocked or suspend.
+ */
+void rt_thread_idle_sethook(void (*hook)(void))
+{
+    rt_thread_idle_hook = hook;
+}
+#endif
+
+/* Return whether there is defunctional thread to be deleted. */
+rt_inline int _has_defunct_thread(void)
+{
+    /* The rt_list_isempty has prototype of "int rt_list_isempty(const rt_list_t *l)".
+     * So the compiler has a good reason that the rt_thread_defunct list does
+     * not change within rt_thread_idle_excute thus optimize the "while" loop
+     * into a "if".
+     *
+     * So add the volatile qualifier here. */
+    const volatile rt_list_t *l = (const volatile rt_list_t*)&rt_thread_defunct;
+
+    return l->next != l;
+}
+
+/**
+ * @ingroup Thread
+ *
+ * This function will perform system background job when system idle.
+ */
+void rt_thread_idle_excute(void)
+{
+    /* Loop until there is no dead thread. So one call to rt_thread_idle_excute
+     * will do all the cleanups. */
+    while (_has_defunct_thread())
+    {
+        rt_base_t lock;
+        rt_thread_t thread;
+#ifdef RT_USING_MODULE
+        rt_module_t module = RT_NULL;
+#endif
+        RT_DEBUG_NOT_IN_INTERRUPT;
+
+        /* disable interrupt */
+        lock = rt_hw_interrupt_disable();
+
+        /* re-check whether list is empty */
+        if (_has_defunct_thread())
+        {
+            /* get defunct thread */
+            thread = rt_list_entry(rt_thread_defunct.next,
+                                   struct rt_thread,
+                                   tlist);
+#ifdef RT_USING_MODULE
+            /* get thread's parent module */
+            module = (rt_module_t)thread->module_id;
+
+            /* if the thread is module's main thread */
+            if (module != RT_NULL && module->module_thread == thread)
+            {
+                /* detach module's main thread */
+                module->module_thread = RT_NULL;
+            }
+#endif
+            /* remove defunct thread */
+            rt_list_remove(&(thread->tlist));
+            /* invoke thread cleanup */
+            if (thread->cleanup != RT_NULL)
+                thread->cleanup(thread);
+
+            /* if it's a system object, not delete it */
+            if (rt_object_is_systemobject((rt_object_t)thread) == RT_TRUE)
+            {
+                /* enable interrupt */
+                rt_hw_interrupt_enable(lock);
+
+                return;
+            }
+        }
+        else
+        {
+            /* enable interrupt */
+            rt_hw_interrupt_enable(lock);
+
+            /* may the defunct thread list is removed by others, just return */
+            return;
+        }
+
+        /* enable interrupt */
+        rt_hw_interrupt_enable(lock);
+
+#ifdef RT_USING_HEAP
+#if defined(RT_USING_MODULE) && defined(RT_USING_SLAB)
+        /* the thread belongs to an application module */
+        if (thread->flags & RT_OBJECT_FLAG_MODULE)
+            rt_module_free((rt_module_t)thread->module_id, thread->stack_addr);
+        else
+#endif
+        /* release thread's stack */
+        RT_KERNEL_FREE(thread->stack_addr);
+        /* delete thread object */
+        rt_object_delete((rt_object_t)thread);
+#endif
+
+#ifdef RT_USING_MODULE
+        if (module != RT_NULL)
+        {
+            extern rt_err_t rt_module_destroy(rt_module_t module);
+
+            /* if sub thread list and main thread are all empty */
+            if ((module->module_thread == RT_NULL) &&
+                rt_list_isempty(&module->module_object[RT_Object_Class_Thread].object_list))
+            {
+                module->nref --;
+            }
+
+            /* destroy module */
+            if (module->nref == 0)
+                rt_module_destroy(module);
+        }
+#endif
+    }
+}
+
+static void rt_thread_idle_entry(void *parameter)
+{
+    rt_hw_interrupt_enable(0x888);
+    while (1)
+    {
+    #ifdef RT_USING_IDLE_HOOK
+        if (rt_thread_idle_hook != RT_NULL)
+        {
+            rt_thread_idle_hook();
+        }
+    #endif
+
+        rt_thread_idle_excute();
+    }
+}
+
+/**
+ * @ingroup SystemInit
+ *
+ * This function will initialize idle thread, then start it.
+ *
+ * @note this function must be invoked when system init.
+ */
+void rt_thread_idle_init(void)
+{
+    /* initialize thread */
+    rt_thread_init(&idle,
+                   "tidle",
+                   rt_thread_idle_entry,
+                   RT_NULL,
+                   &rt_thread_stack[0],
+                   sizeof(rt_thread_stack),
+                   RT_THREAD_PRIORITY_MAX - 1,
+                   32);
+
+    /* startup */
+    rt_thread_startup(&idle);
+}
+
+/**
+ * @ingroup Thread
+ *
+ * This function will get the handler of the idle thread.
+ *
+ */
+rt_thread_t rt_thread_idle_gethandler(void)
+{
+    return (rt_thread_t)(&idle);
+}