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Dependencies:   SDFileSystem TextLCD mbed-rtos mbed wave_player FATFileSystem

MbedModules/mbed-rtos/rtx/HAL_CM.c@0:6dff7b3b161d, 2014-12-26 (annotated)

Committer:
ywang627
Date:
Fri Dec 26 13:38:44 2014 +0000
Revision:
0:6dff7b3b161d
Battleship Game

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ywang627 0:6dff7b3b161d 1 /*----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 2 * RL-ARM - RTX
ywang627 0:6dff7b3b161d 3 *----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 4 * Name: HAL_CM.C
ywang627 0:6dff7b3b161d 5 * Purpose: Hardware Abstraction Layer for Cortex-M
ywang627 0:6dff7b3b161d 6 * Rev.: V4.60
ywang627 0:6dff7b3b161d 7 *----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 8 *
ywang627 0:6dff7b3b161d 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
ywang627 0:6dff7b3b161d 10 * All rights reserved.
ywang627 0:6dff7b3b161d 11 * Redistribution and use in source and binary forms, with or without
ywang627 0:6dff7b3b161d 12 * modification, are permitted provided that the following conditions are met:
ywang627 0:6dff7b3b161d 13 * - Redistributions of source code must retain the above copyright
ywang627 0:6dff7b3b161d 14 * notice, this list of conditions and the following disclaimer.
ywang627 0:6dff7b3b161d 15 * - Redistributions in binary form must reproduce the above copyright
ywang627 0:6dff7b3b161d 16 * notice, this list of conditions and the following disclaimer in the
ywang627 0:6dff7b3b161d 17 * documentation and/or other materials provided with the distribution.
ywang627 0:6dff7b3b161d 18 * - Neither the name of ARM nor the names of its contributors may be used
ywang627 0:6dff7b3b161d 19 * to endorse or promote products derived from this software without
ywang627 0:6dff7b3b161d 20 * specific prior written permission.
ywang627 0:6dff7b3b161d 21 *
ywang627 0:6dff7b3b161d 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ywang627 0:6dff7b3b161d 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ywang627 0:6dff7b3b161d 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ywang627 0:6dff7b3b161d 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
ywang627 0:6dff7b3b161d 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
ywang627 0:6dff7b3b161d 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
ywang627 0:6dff7b3b161d 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
ywang627 0:6dff7b3b161d 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
ywang627 0:6dff7b3b161d 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ywang627 0:6dff7b3b161d 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
ywang627 0:6dff7b3b161d 32 * POSSIBILITY OF SUCH DAMAGE.
ywang627 0:6dff7b3b161d 33 *---------------------------------------------------------------------------*/
ywang627 0:6dff7b3b161d 34
ywang627 0:6dff7b3b161d 35 #include "rt_TypeDef.h"
ywang627 0:6dff7b3b161d 36 #include "RTX_Config.h"
ywang627 0:6dff7b3b161d 37 #include "rt_HAL_CM.h"
ywang627 0:6dff7b3b161d 38
ywang627 0:6dff7b3b161d 39
ywang627 0:6dff7b3b161d 40 /*----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 41 * Global Variables
ywang627 0:6dff7b3b161d 42 *---------------------------------------------------------------------------*/
ywang627 0:6dff7b3b161d 43
ywang627 0:6dff7b3b161d 44 #ifdef DBG_MSG
ywang627 0:6dff7b3b161d 45 BIT dbg_msg;
ywang627 0:6dff7b3b161d 46 #endif
ywang627 0:6dff7b3b161d 47
ywang627 0:6dff7b3b161d 48 /*----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 49 * Functions
ywang627 0:6dff7b3b161d 50 *---------------------------------------------------------------------------*/
ywang627 0:6dff7b3b161d 51
ywang627 0:6dff7b3b161d 52
ywang627 0:6dff7b3b161d 53 /*--------------------------- rt_init_stack ---------------------------------*/
ywang627 0:6dff7b3b161d 54
ywang627 0:6dff7b3b161d 55 void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
ywang627 0:6dff7b3b161d 56 /* Prepare TCB and saved context for a first time start of a task. */
ywang627 0:6dff7b3b161d 57 U32 *stk,i,size;
ywang627 0:6dff7b3b161d 58
ywang627 0:6dff7b3b161d 59 /* Prepare a complete interrupt frame for first task start */
ywang627 0:6dff7b3b161d 60 size = p_TCB->priv_stack >> 2;
ywang627 0:6dff7b3b161d 61
ywang627 0:6dff7b3b161d 62 /* Write to the top of stack. */
ywang627 0:6dff7b3b161d 63 stk = &p_TCB->stack[size];
ywang627 0:6dff7b3b161d 64
ywang627 0:6dff7b3b161d 65 /* Auto correct to 8-byte ARM stack alignment. */
ywang627 0:6dff7b3b161d 66 if ((U32)stk & 0x04) {
ywang627 0:6dff7b3b161d 67 stk--;
ywang627 0:6dff7b3b161d 68 }
ywang627 0:6dff7b3b161d 69
ywang627 0:6dff7b3b161d 70 stk -= 16;
ywang627 0:6dff7b3b161d 71
ywang627 0:6dff7b3b161d 72 /* Default xPSR and initial PC */
ywang627 0:6dff7b3b161d 73 stk[15] = INITIAL_xPSR;
ywang627 0:6dff7b3b161d 74 stk[14] = (U32)task_body;
ywang627 0:6dff7b3b161d 75
ywang627 0:6dff7b3b161d 76 /* Clear R4-R11,R0-R3,R12,LR registers. */
ywang627 0:6dff7b3b161d 77 for (i = 0; i < 14; i++) {
ywang627 0:6dff7b3b161d 78 stk[i] = 0;
ywang627 0:6dff7b3b161d 79 }
ywang627 0:6dff7b3b161d 80
ywang627 0:6dff7b3b161d 81 /* Assign a void pointer to R0. */
ywang627 0:6dff7b3b161d 82 stk[8] = (U32)p_TCB->msg;
ywang627 0:6dff7b3b161d 83
ywang627 0:6dff7b3b161d 84 /* Initial Task stack pointer. */
ywang627 0:6dff7b3b161d 85 p_TCB->tsk_stack = (U32)stk;
ywang627 0:6dff7b3b161d 86
ywang627 0:6dff7b3b161d 87 /* Task entry point. */
ywang627 0:6dff7b3b161d 88 p_TCB->ptask = task_body;
ywang627 0:6dff7b3b161d 89
ywang627 0:6dff7b3b161d 90 /* Set a magic word for checking of stack overflow.
ywang627 0:6dff7b3b161d 91 For the main thread (ID: 0x01) the stack is in a memory area shared with the
ywang627 0:6dff7b3b161d 92 heap, therefore the last word of the stack is a moving target.
ywang627 0:6dff7b3b161d 93 We want to do stack/heap collision detection instead.
ywang627 0:6dff7b3b161d 94 */
ywang627 0:6dff7b3b161d 95 if (p_TCB->task_id != 0x01)
ywang627 0:6dff7b3b161d 96 p_TCB->stack[0] = MAGIC_WORD;
ywang627 0:6dff7b3b161d 97 }
ywang627 0:6dff7b3b161d 98
ywang627 0:6dff7b3b161d 99
ywang627 0:6dff7b3b161d 100 /*--------------------------- rt_ret_val ----------------------------------*/
ywang627 0:6dff7b3b161d 101
ywang627 0:6dff7b3b161d 102 static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
ywang627 0:6dff7b3b161d 103 /* Get pointer to task return value registers (R0..R3) in Stack */
ywang627 0:6dff7b3b161d 104 #if (__TARGET_FPU_VFP)
ywang627 0:6dff7b3b161d 105 if (p_TCB->stack_frame) {
ywang627 0:6dff7b3b161d 106 /* Extended Stack Frame: R4-R11,S16-S31,R0-R3,R12,LR,PC,xPSR,S0-S15,FPSCR */
ywang627 0:6dff7b3b161d 107 return (U32 *)(p_TCB->tsk_stack + 8*4 + 16*4);
ywang627 0:6dff7b3b161d 108 } else {
ywang627 0:6dff7b3b161d 109 /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
ywang627 0:6dff7b3b161d 110 return (U32 *)(p_TCB->tsk_stack + 8*4);
ywang627 0:6dff7b3b161d 111 }
ywang627 0:6dff7b3b161d 112 #else
ywang627 0:6dff7b3b161d 113 /* Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
ywang627 0:6dff7b3b161d 114 return (U32 *)(p_TCB->tsk_stack + 8*4);
ywang627 0:6dff7b3b161d 115 #endif
ywang627 0:6dff7b3b161d 116 }
ywang627 0:6dff7b3b161d 117
ywang627 0:6dff7b3b161d 118 void rt_ret_val (P_TCB p_TCB, U32 v0) {
ywang627 0:6dff7b3b161d 119 U32 *ret;
ywang627 0:6dff7b3b161d 120
ywang627 0:6dff7b3b161d 121 ret = rt_ret_regs(p_TCB);
ywang627 0:6dff7b3b161d 122 ret[0] = v0;
ywang627 0:6dff7b3b161d 123 }
ywang627 0:6dff7b3b161d 124
ywang627 0:6dff7b3b161d 125 void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
ywang627 0:6dff7b3b161d 126 U32 *ret;
ywang627 0:6dff7b3b161d 127
ywang627 0:6dff7b3b161d 128 ret = rt_ret_regs(p_TCB);
ywang627 0:6dff7b3b161d 129 ret[0] = v0;
ywang627 0:6dff7b3b161d 130 ret[1] = v1;
ywang627 0:6dff7b3b161d 131 }
ywang627 0:6dff7b3b161d 132
ywang627 0:6dff7b3b161d 133
ywang627 0:6dff7b3b161d 134 /*--------------------------- dbg_init --------------------------------------*/
ywang627 0:6dff7b3b161d 135
ywang627 0:6dff7b3b161d 136 #ifdef DBG_MSG
ywang627 0:6dff7b3b161d 137 void dbg_init (void) {
ywang627 0:6dff7b3b161d 138 if ((DEMCR & DEMCR_TRCENA) &&
ywang627 0:6dff7b3b161d 139 (ITM_CONTROL & ITM_ITMENA) &&
ywang627 0:6dff7b3b161d 140 (ITM_ENABLE & (1UL << 31))) {
ywang627 0:6dff7b3b161d 141 dbg_msg = __TRUE;
ywang627 0:6dff7b3b161d 142 }
ywang627 0:6dff7b3b161d 143 }
ywang627 0:6dff7b3b161d 144 #endif
ywang627 0:6dff7b3b161d 145
ywang627 0:6dff7b3b161d 146 /*--------------------------- dbg_task_notify -------------------------------*/
ywang627 0:6dff7b3b161d 147
ywang627 0:6dff7b3b161d 148 #ifdef DBG_MSG
ywang627 0:6dff7b3b161d 149 void dbg_task_notify (P_TCB p_tcb, BOOL create) {
ywang627 0:6dff7b3b161d 150 while (ITM_PORT31_U32 == 0);
ywang627 0:6dff7b3b161d 151 ITM_PORT31_U32 = (U32)p_tcb->ptask;
ywang627 0:6dff7b3b161d 152 while (ITM_PORT31_U32 == 0);
ywang627 0:6dff7b3b161d 153 ITM_PORT31_U16 = (create << 8) | p_tcb->task_id;
ywang627 0:6dff7b3b161d 154 }
ywang627 0:6dff7b3b161d 155 #endif
ywang627 0:6dff7b3b161d 156
ywang627 0:6dff7b3b161d 157 /*--------------------------- dbg_task_switch -------------------------------*/
ywang627 0:6dff7b3b161d 158
ywang627 0:6dff7b3b161d 159 #ifdef DBG_MSG
ywang627 0:6dff7b3b161d 160 void dbg_task_switch (U32 task_id) {
ywang627 0:6dff7b3b161d 161 while (ITM_PORT31_U32 == 0);
ywang627 0:6dff7b3b161d 162 ITM_PORT31_U8 = task_id;
ywang627 0:6dff7b3b161d 163 }
ywang627 0:6dff7b3b161d 164 #endif
ywang627 0:6dff7b3b161d 165
ywang627 0:6dff7b3b161d 166
ywang627 0:6dff7b3b161d 167 /*----------------------------------------------------------------------------
ywang627 0:6dff7b3b161d 168 * end of file
ywang627 0:6dff7b3b161d 169 *---------------------------------------------------------------------------*/
ywang627 0:6dff7b3b161d 170