mbed school / mbed-rtos

error.h to mbed_error.h

Dependents:   ch5_mbed_lightweight_Web_server_dust_sensor

Fork of mbed-rtos by mbed official

rtx/TARGET_CORTEX_M/HAL_CM.c@64:5448826aa700, 2015-01-29 (annotated)

Committer:
mbed_official
Date:
Thu Jan 29 07:30:28 2015 +0000
Revision:
64:5448826aa700
Parent:
49:77c8e4604045 
Synchronized with git revision 07ed4ec541befacdba1c38bf057c7c2209aa9d00



Full URL: https://github.com/mbedmicro/mbed/commit/07ed4ec541befacdba1c38bf057c7c2209aa9d00/



Extended RTOS support for LPC4330 Target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 49:77c8e4604045 1 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 2 * RL-ARM - RTX
mbed_official 49:77c8e4604045 3 *----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 4 * Name: HAL_CM.C
mbed_official 49:77c8e4604045 5 * Purpose: Hardware Abstraction Layer for Cortex-M
mbed_official 49:77c8e4604045 6 * Rev.: V4.60
mbed_official 49:77c8e4604045 7 *----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 8 *
mbed_official 49:77c8e4604045 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
mbed_official 49:77c8e4604045 10 * All rights reserved.
mbed_official 49:77c8e4604045 11 * Redistribution and use in source and binary forms, with or without
mbed_official 49:77c8e4604045 12 * modification, are permitted provided that the following conditions are met:
mbed_official 49:77c8e4604045 13 * - Redistributions of source code must retain the above copyright
mbed_official 49:77c8e4604045 14 * notice, this list of conditions and the following disclaimer.
mbed_official 49:77c8e4604045 15 * - Redistributions in binary form must reproduce the above copyright
mbed_official 49:77c8e4604045 16 * notice, this list of conditions and the following disclaimer in the
mbed_official 49:77c8e4604045 17 * documentation and/or other materials provided with the distribution.
mbed_official 49:77c8e4604045 18 * - Neither the name of ARM nor the names of its contributors may be used
mbed_official 49:77c8e4604045 19 * to endorse or promote products derived from this software without
mbed_official 49:77c8e4604045 20 * specific prior written permission.
mbed_official 49:77c8e4604045 21 *
mbed_official 49:77c8e4604045 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 49:77c8e4604045 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 49:77c8e4604045 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 49:77c8e4604045 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbed_official 49:77c8e4604045 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 49:77c8e4604045 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 49:77c8e4604045 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 49:77c8e4604045 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 49:77c8e4604045 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 49:77c8e4604045 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 49:77c8e4604045 32 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 49:77c8e4604045 33 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 34
mbed_official 49:77c8e4604045 35 #include "rt_TypeDef.h"
mbed_official 49:77c8e4604045 36 #include "RTX_Conf.h"
mbed_official 49:77c8e4604045 37 #include "rt_HAL_CM.h"
mbed_official 49:77c8e4604045 38
mbed_official 49:77c8e4604045 39
mbed_official 49:77c8e4604045 40 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 41 * Global Variables
mbed_official 49:77c8e4604045 42 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 43
mbed_official 49:77c8e4604045 44 #ifdef DBG_MSG
mbed_official 49:77c8e4604045 45 BIT dbg_msg;
mbed_official 49:77c8e4604045 46 #endif
mbed_official 49:77c8e4604045 47
mbed_official 49:77c8e4604045 48 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 49 * Functions
mbed_official 49:77c8e4604045 50 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 51
mbed_official 49:77c8e4604045 52
mbed_official 49:77c8e4604045 53 /*--------------------------- rt_init_stack ---------------------------------*/
mbed_official 49:77c8e4604045 54
mbed_official 49:77c8e4604045 55 void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
mbed_official 49:77c8e4604045 56 /* Prepare TCB and saved context for a first time start of a task. */
mbed_official 49:77c8e4604045 57 U32 *stk,i,size;
mbed_official 49:77c8e4604045 58
mbed_official 49:77c8e4604045 59 /* Prepare a complete interrupt frame for first task start */
mbed_official 49:77c8e4604045 60 size = p_TCB->priv_stack >> 2;
mbed_official 49:77c8e4604045 61
mbed_official 49:77c8e4604045 62 /* Write to the top of stack. */
mbed_official 49:77c8e4604045 63 stk = &p_TCB->stack[size];
mbed_official 49:77c8e4604045 64
mbed_official 49:77c8e4604045 65 /* Auto correct to 8-byte ARM stack alignment. */
mbed_official 49:77c8e4604045 66 if ((U32)stk & 0x04) {
mbed_official 49:77c8e4604045 67 stk--;
mbed_official 49:77c8e4604045 68 }
mbed_official 49:77c8e4604045 69
mbed_official 49:77c8e4604045 70 stk -= 16;
mbed_official 49:77c8e4604045 71
mbed_official 49:77c8e4604045 72 /* Default xPSR and initial PC */
mbed_official 49:77c8e4604045 73 stk[15] = INITIAL_xPSR;
mbed_official 49:77c8e4604045 74 stk[14] = (U32)task_body;
mbed_official 49:77c8e4604045 75
mbed_official 49:77c8e4604045 76 /* Clear R4-R11,R0-R3,R12,LR registers. */
mbed_official 49:77c8e4604045 77 for (i = 0; i < 14; i++) {
mbed_official 49:77c8e4604045 78 stk[i] = 0;
mbed_official 49:77c8e4604045 79 }
mbed_official 49:77c8e4604045 80
mbed_official 49:77c8e4604045 81 /* Assign a void pointer to R0. */
mbed_official 49:77c8e4604045 82 stk[8] = (U32)p_TCB->msg;
mbed_official 49:77c8e4604045 83
mbed_official 49:77c8e4604045 84 /* Initial Task stack pointer. */
mbed_official 49:77c8e4604045 85 p_TCB->tsk_stack = (U32)stk;
mbed_official 49:77c8e4604045 86
mbed_official 49:77c8e4604045 87 /* Task entry point. */
mbed_official 49:77c8e4604045 88 p_TCB->ptask = task_body;
mbed_official 49:77c8e4604045 89
mbed_official 49:77c8e4604045 90 /* Set a magic word for checking of stack overflow.
mbed_official 49:77c8e4604045 91 For the main thread (ID: 0x01) the stack is in a memory area shared with the
mbed_official 49:77c8e4604045 92 heap, therefore the last word of the stack is a moving target.
mbed_official 49:77c8e4604045 93 We want to do stack/heap collision detection instead.
mbed_official 49:77c8e4604045 94 */
mbed_official 49:77c8e4604045 95 if (p_TCB->task_id != 0x01)
mbed_official 49:77c8e4604045 96 p_TCB->stack[0] = MAGIC_WORD;
mbed_official 49:77c8e4604045 97 }
mbed_official 49:77c8e4604045 98
mbed_official 49:77c8e4604045 99
mbed_official 49:77c8e4604045 100 /*--------------------------- rt_ret_val ----------------------------------*/
mbed_official 49:77c8e4604045 101
mbed_official 49:77c8e4604045 102 static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
mbed_official 49:77c8e4604045 103 /* Get pointer to task return value registers (R0..R3) in Stack */
mbed_official 49:77c8e4604045 104 #if (__TARGET_FPU_VFP)
mbed_official 49:77c8e4604045 105 if (p_TCB->stack_frame) {
mbed_official 49:77c8e4604045 106 /* Extended Stack Frame: R4-R11,S16-S31,R0-R3,R12,LR,PC,xPSR,S0-S15,FPSCR */
mbed_official 49:77c8e4604045 107 return (U32 *)(p_TCB->tsk_stack + 8*4 + 16*4);
mbed_official 49:77c8e4604045 108 } else {
mbed_official 49:77c8e4604045 109 /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
mbed_official 49:77c8e4604045 110 return (U32 *)(p_TCB->tsk_stack + 8*4);
mbed_official 49:77c8e4604045 111 }
mbed_official 49:77c8e4604045 112 #else
mbed_official 49:77c8e4604045 113 /* Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
mbed_official 49:77c8e4604045 114 return (U32 *)(p_TCB->tsk_stack + 8*4);
mbed_official 49:77c8e4604045 115 #endif
mbed_official 49:77c8e4604045 116 }
mbed_official 49:77c8e4604045 117
mbed_official 49:77c8e4604045 118 void rt_ret_val (P_TCB p_TCB, U32 v0) {
mbed_official 49:77c8e4604045 119 U32 *ret;
mbed_official 49:77c8e4604045 120
mbed_official 49:77c8e4604045 121 ret = rt_ret_regs(p_TCB);
mbed_official 49:77c8e4604045 122 ret[0] = v0;
mbed_official 49:77c8e4604045 123 }
mbed_official 49:77c8e4604045 124
mbed_official 49:77c8e4604045 125 void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
mbed_official 49:77c8e4604045 126 U32 *ret;
mbed_official 49:77c8e4604045 127
mbed_official 49:77c8e4604045 128 ret = rt_ret_regs(p_TCB);
mbed_official 49:77c8e4604045 129 ret[0] = v0;
mbed_official 49:77c8e4604045 130 ret[1] = v1;
mbed_official 49:77c8e4604045 131 }
mbed_official 49:77c8e4604045 132
mbed_official 49:77c8e4604045 133
mbed_official 49:77c8e4604045 134 /*--------------------------- dbg_init --------------------------------------*/
mbed_official 49:77c8e4604045 135
mbed_official 49:77c8e4604045 136 #ifdef DBG_MSG
mbed_official 49:77c8e4604045 137 void dbg_init (void) {
mbed_official 49:77c8e4604045 138 if ((DEMCR & DEMCR_TRCENA) &&
mbed_official 49:77c8e4604045 139 (ITM_CONTROL & ITM_ITMENA) &&
mbed_official 49:77c8e4604045 140 (ITM_ENABLE & (1UL << 31))) {
mbed_official 49:77c8e4604045 141 dbg_msg = __TRUE;
mbed_official 49:77c8e4604045 142 }
mbed_official 49:77c8e4604045 143 }
mbed_official 49:77c8e4604045 144 #endif
mbed_official 49:77c8e4604045 145
mbed_official 49:77c8e4604045 146 /*--------------------------- dbg_task_notify -------------------------------*/
mbed_official 49:77c8e4604045 147
mbed_official 49:77c8e4604045 148 #ifdef DBG_MSG
mbed_official 49:77c8e4604045 149 void dbg_task_notify (P_TCB p_tcb, BOOL create) {
mbed_official 49:77c8e4604045 150 while (ITM_PORT31_U32 == 0);
mbed_official 49:77c8e4604045 151 ITM_PORT31_U32 = (U32)p_tcb->ptask;
mbed_official 49:77c8e4604045 152 while (ITM_PORT31_U32 == 0);
mbed_official 49:77c8e4604045 153 ITM_PORT31_U16 = (create << 8) | p_tcb->task_id;
mbed_official 49:77c8e4604045 154 }
mbed_official 49:77c8e4604045 155 #endif
mbed_official 49:77c8e4604045 156
mbed_official 49:77c8e4604045 157 /*--------------------------- dbg_task_switch -------------------------------*/
mbed_official 49:77c8e4604045 158
mbed_official 49:77c8e4604045 159 #ifdef DBG_MSG
mbed_official 49:77c8e4604045 160 void dbg_task_switch (U32 task_id) {
mbed_official 49:77c8e4604045 161 while (ITM_PORT31_U32 == 0);
mbed_official 49:77c8e4604045 162 ITM_PORT31_U8 = task_id;
mbed_official 49:77c8e4604045 163 }
mbed_official 49:77c8e4604045 164 #endif
mbed_official 49:77c8e4604045 165
mbed_official 49:77c8e4604045 166
mbed_official 49:77c8e4604045 167 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 168 * end of file
mbed_official 49:77c8e4604045 169 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 170