初始提交

Project/Src/rt-thread/libcpu/ti-dsp/c28x/cpuport.c

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-09-01     xuzhuoyi     the first version.
+ */
+
+#include <rtthread.h>
+
+/* exception and interrupt handler table */
+rt_uint32_t rt_interrupt_from_thread;
+rt_uint32_t rt_interrupt_to_thread;
+rt_uint32_t rt_thread_switch_interrupt_flag;
+/* exception hook */
+static rt_err_t (*rt_exception_hook)(void *context) = RT_NULL;
+
+struct exception_stack_frame
+{
+    rt_uint32_t t_st0;
+    rt_uint32_t acc;
+    rt_uint32_t p;
+    rt_uint32_t ar1_ar0;
+    rt_uint32_t dp_st1;
+    rt_uint32_t dbgstat_ier;
+    rt_uint32_t return_address;
+};
+
+struct stack_frame
+{
+    struct exception_stack_frame exception_stack_frame;
+
+    /* r4 ~ r11 register */
+    rt_uint16_t ar0h;
+    rt_uint16_t ar1h;
+    rt_uint32_t xar2;
+    rt_uint32_t xar3;
+    rt_uint32_t xar4;
+    rt_uint32_t xar5;
+    rt_uint32_t xar6;
+    rt_uint32_t xar7;
+    rt_uint32_t xt;
+    rt_uint32_t rpc;
+
+
+};
+
+rt_uint8_t *rt_hw_stack_init(void       *tentry,
+                             void       *parameter,
+                             rt_uint8_t *stack_addr,
+                             void       *texit)
+{
+    struct stack_frame *stack_frame;
+    rt_uint8_t         *stk;
+    unsigned long       i;
+
+    stk  = stack_addr;
+    stk  = (rt_uint8_t *)RT_ALIGN((rt_uint32_t)stk, 8);
+    //stk -= sizeof(struct stack_frame);
+
+    stack_frame = (struct stack_frame *)stk;
+
+    /* init all register */
+    for (i = 0; i < sizeof(struct stack_frame) / sizeof(rt_uint32_t); i ++)
+    {
+        ((rt_uint32_t *)stack_frame)[i] = 0xdeadbeef;
+    }
+
+    stack_frame->exception_stack_frame.t_st0   = 0x11110000 | rt_hw_get_st0();
+    stack_frame->exception_stack_frame.acc     = 0x33332222;
+    stack_frame->exception_stack_frame.ar1_ar0 = 0x00001111 & (unsigned long)parameter; /* ar0 : argument */
+    stack_frame->exception_stack_frame.p       = 0x55554444;                            /* p */
+    stack_frame->exception_stack_frame.dp_st1  = (0x00000000) | rt_hw_get_st1();        /* dp_st1 */
+    stack_frame->exception_stack_frame.dbgstat_ier    = 0;                              /* dbgstat_ier */
+    stack_frame->exception_stack_frame.return_address = (unsigned long)tentry;          /* return_address */
+    stack_frame->rpc = (unsigned long)texit;
+
+    /* return task's current stack address */
+    return stk + sizeof(struct stack_frame);
+}
+
+/**
+ * This function set the hook, which is invoked on fault exception handling.
+ *
+ * @param exception_handle the exception handling hook function.
+ */
+void rt_hw_exception_install(rt_err_t (*exception_handle)(void *context))
+{
+    rt_exception_hook = exception_handle;
+}
+
+
+struct exception_info
+{
+    rt_uint32_t exc_return;
+    struct stack_frame stack_frame;
+};
+
+
+/**
+ * shutdown CPU
+ */
+void rt_hw_cpu_shutdown(void)
+{
+    rt_kprintf("shutdown...\n");
+
+    RT_ASSERT(0);
+}