diff options
| author | dzzxzz <[email protected]> | 2010-06-29 02:33:54 +0000 |
|---|---|---|
| committer | dzzxzz <[email protected]> | 2010-06-29 02:33:54 +0000 |
| commit | b2f78b2e776107298a66ff610591c990d1296436 (patch) | |
| tree | 87667b3d84644d7b976d5c7635002a1facdbe6f7 /libcpu/v850/stack.c | |
| parent | 4ca5596c9c1393049d5502f22b132e243985e0e6 (diff) | |
port rt-thread to NEC V850E
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@779 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'libcpu/v850/stack.c')
| -rw-r--r-- | libcpu/v850/stack.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/libcpu/v850/stack.c b/libcpu/v850/stack.c new file mode 100644 index 0000000000..2658716485 --- /dev/null +++ b/libcpu/v850/stack.c @@ -0,0 +1,61 @@ +/*
+ * File : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2009, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2010-06-29 lgnq the first version
+ *
+ * For : NEC V850E
+ * Toolchain : IAR Embedded Workbench for V850 v3.71
+*/
+
+#include <rtthread.h>
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
+{
+ rt_uint32_t *stk;
+
+ stk = (rt_uint32_t *)stack_addr; /* Load stack pointer */
+ *(--stk) = (rt_uint32_t) 0x23232323; /* r23 */
+ *(--stk) = (rt_uint32_t) 0x24242424; /* r24 */
+ *(--stk) = (rt_uint32_t) 0x25252525; /* r25 */
+ *(--stk) = (rt_uint32_t) 0x26262626; /* r26 */
+ *(--stk) = (rt_uint32_t) 0x27272727; /* r27 */
+ *(--stk) = (rt_uint32_t) 0x28282828; /* r28 */
+ *(--stk) = (rt_uint32_t) 0x29292929; /* r29 */
+ *(--stk) = (rt_uint32_t) 0x30303030; /* r30 */
+ *(--stk) = (rt_uint32_t) 0x31313131; /* r31 */
+ *(--stk) = (rt_uint32_t) 0x00000000; /* Task PSW = Interrupts enabled */
+ *(--stk) = (rt_uint32_t) tentry; /* Task's PC */
+ *(--stk) = (rt_uint32_t) 0x16161616; /* r16 */
+ *(--stk) = (rt_uint32_t) 0x15151515; /* r15 */
+ *(--stk) = (rt_uint32_t) 0x14141414; /* r14 */
+ *(--stk) = (rt_uint32_t) 0x13131313; /* r13 */
+ *(--stk) = (rt_uint32_t) 0x12121212; /* r12 */
+ *(--stk) = (rt_uint32_t) 0x11111111; /* r11 */
+ *(--stk) = (rt_uint32_t) 0x10101010; /* r10 */
+ *(--stk) = (rt_uint32_t) 0x09090909; /* r9 */
+ *(--stk) = (rt_uint32_t) 0x08080808; /* r8 */
+ *(--stk) = (rt_uint32_t) 0x07070707; /* r7 */
+ *(--stk) = (rt_uint32_t) 0x06060606; /* r6 */
+ *(--stk) = (rt_uint32_t) 0x05050505; /* r5 */
+ *(--stk) = (rt_uint32_t) 0x02020202; /* r2 */
+ *(--stk) = (rt_uint32_t) parameter; /* r1 */
+ return ((rt_uint8_t *)stk);
+}
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