Austin Blackstone / Mbed 2 deprecated client-lwip-lightswitch-demo-expanded

mbed client lightswitch demo

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by Austin Blackstone

mbed-rtos/rtx/TARGET_CORTEX_A/HAL_CA.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

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mbedAustin 11:cada08fc8a70 1 /*----------------------------------------------------------------------------
mbedAustin 11:cada08fc8a70 2 * RL-ARM - RTX
mbedAustin 11:cada08fc8a70 3 *----------------------------------------------------------------------------
mbedAustin 11:cada08fc8a70 4 * Name: HAL_CA.C
mbedAustin 11:cada08fc8a70 5 * Purpose: Hardware Abstraction Layer for Cortex-A
mbedAustin 11:cada08fc8a70 6 * Rev.:
mbedAustin 11:cada08fc8a70 7 *----------------------------------------------------------------------------
mbedAustin 11:cada08fc8a70 8 *
mbedAustin 11:cada08fc8a70 9 * Copyright (c) 2012 ARM Limited
mbedAustin 11:cada08fc8a70 10 * All rights reserved.
mbedAustin 11:cada08fc8a70 11 * Redistribution and use in source and binary forms, with or without
mbedAustin 11:cada08fc8a70 12 * modification, are permitted provided that the following conditions are met:
mbedAustin 11:cada08fc8a70 13 * - Redistributions of source code must retain the above copyright
mbedAustin 11:cada08fc8a70 14 * notice, this list of conditions and the following disclaimer.
mbedAustin 11:cada08fc8a70 15 * - Redistributions in binary form must reproduce the above copyright
mbedAustin 11:cada08fc8a70 16 * notice, this list of conditions and the following disclaimer in the
mbedAustin 11:cada08fc8a70 17 * documentation and/or other materials provided with the distribution.
mbedAustin 11:cada08fc8a70 18 * - Neither the name of ARM nor the names of its contributors may be used
mbedAustin 11:cada08fc8a70 19 * to endorse or promote products derived from this software without
mbedAustin 11:cada08fc8a70 20 * specific prior written permission.
mbedAustin 11:cada08fc8a70 21 *
mbedAustin 11:cada08fc8a70 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbedAustin 11:cada08fc8a70 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbedAustin 11:cada08fc8a70 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbedAustin 11:cada08fc8a70 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbedAustin 11:cada08fc8a70 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbedAustin 11:cada08fc8a70 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbedAustin 11:cada08fc8a70 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbedAustin 11:cada08fc8a70 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbedAustin 11:cada08fc8a70 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbedAustin 11:cada08fc8a70 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbedAustin 11:cada08fc8a70 32 * POSSIBILITY OF SUCH DAMAGE.
mbedAustin 11:cada08fc8a70 33 *---------------------------------------------------------------------------*/
mbedAustin 11:cada08fc8a70 34
mbedAustin 11:cada08fc8a70 35 #include "rt_TypeDef.h"
mbedAustin 11:cada08fc8a70 36 #include "RTX_Config.h"
mbedAustin 11:cada08fc8a70 37 #include "rt_HAL_CA.h"
mbedAustin 11:cada08fc8a70 38
mbedAustin 11:cada08fc8a70 39 /*--------------------------- os_init_context -------------------------------*/
mbedAustin 11:cada08fc8a70 40
mbedAustin 11:cada08fc8a70 41 void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
mbedAustin 11:cada08fc8a70 42 /* Prepare TCB and saved context for a first time start of a task. */
mbedAustin 11:cada08fc8a70 43 U32 *stk,i,size;
mbedAustin 11:cada08fc8a70 44
mbedAustin 11:cada08fc8a70 45 /* Prepare a complete interrupt frame for first task start */
mbedAustin 11:cada08fc8a70 46 size = p_TCB->priv_stack >> 2;
mbedAustin 11:cada08fc8a70 47 if (size == 0) {
mbedAustin 11:cada08fc8a70 48 size = (U16)os_stackinfo >> 2;
mbedAustin 11:cada08fc8a70 49 }
mbedAustin 11:cada08fc8a70 50 /* Write to the top of stack. */
mbedAustin 11:cada08fc8a70 51 stk = &p_TCB->stack[size];
mbedAustin 11:cada08fc8a70 52
mbedAustin 11:cada08fc8a70 53 /* Auto correct to 8-byte ARM stack alignment. */
mbedAustin 11:cada08fc8a70 54 if ((U32)stk & 0x04) {
mbedAustin 11:cada08fc8a70 55 stk--;
mbedAustin 11:cada08fc8a70 56 }
mbedAustin 11:cada08fc8a70 57
mbedAustin 11:cada08fc8a70 58 stk -= 16;
mbedAustin 11:cada08fc8a70 59
mbedAustin 11:cada08fc8a70 60 /* Initial PC and default CPSR */
mbedAustin 11:cada08fc8a70 61 stk[14] = (U32)task_body;
mbedAustin 11:cada08fc8a70 62 /* Task run mode is inherited from the startup file. */
mbedAustin 11:cada08fc8a70 63 /* (non-privileged USER or privileged SYSTEM mode) */
mbedAustin 11:cada08fc8a70 64 stk[15] = (os_flags & 1) ? INIT_CPSR_SYS : INIT_CPSR_USER;
mbedAustin 11:cada08fc8a70 65 /* Set T-bit if task function in Thumb mode. */
mbedAustin 11:cada08fc8a70 66 if ((U32)task_body & 1) {
mbedAustin 11:cada08fc8a70 67 stk[15] |= CPSR_T_BIT;
mbedAustin 11:cada08fc8a70 68 }
mbedAustin 11:cada08fc8a70 69 /* Assign a void pointer to R0. */
mbedAustin 11:cada08fc8a70 70 stk[8] = (U32)p_TCB->msg;
mbedAustin 11:cada08fc8a70 71 /* Clear R1-R12,LR registers. */
mbedAustin 11:cada08fc8a70 72 for (i = 0; i < 8; i++) {
mbedAustin 11:cada08fc8a70 73 stk[i] = 0;
mbedAustin 11:cada08fc8a70 74 }
mbedAustin 11:cada08fc8a70 75 for (i = 9; i < 14; i++) {
mbedAustin 11:cada08fc8a70 76 stk[i] = 0;
mbedAustin 11:cada08fc8a70 77 }
mbedAustin 11:cada08fc8a70 78
mbedAustin 11:cada08fc8a70 79 /* Initial Task stack pointer. */
mbedAustin 11:cada08fc8a70 80 p_TCB->tsk_stack = (U32)stk;
mbedAustin 11:cada08fc8a70 81
mbedAustin 11:cada08fc8a70 82 /* Task entry point. */
mbedAustin 11:cada08fc8a70 83 p_TCB->ptask = task_body;
mbedAustin 11:cada08fc8a70 84
mbedAustin 11:cada08fc8a70 85 /* Set a magic word for checking of stack overflow. */
mbedAustin 11:cada08fc8a70 86 p_TCB->stack[0] = MAGIC_WORD;
mbedAustin 11:cada08fc8a70 87 }
mbedAustin 11:cada08fc8a70 88
mbedAustin 11:cada08fc8a70 89
mbedAustin 11:cada08fc8a70 90 /*--------------------------- rt_ret_val ----------------------------------*/
mbedAustin 11:cada08fc8a70 91
mbedAustin 11:cada08fc8a70 92 static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
mbedAustin 11:cada08fc8a70 93 /* Get pointer to task return value registers (R0..R3) in Stack */
mbedAustin 11:cada08fc8a70 94 if (p_TCB->stack_frame & 0x4) {
mbedAustin 11:cada08fc8a70 95 /* NEON/D32 Stack Frame: D0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
mbedAustin 11:cada08fc8a70 96 return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*8);
mbedAustin 11:cada08fc8a70 97 } else if (p_TCB->stack_frame & 0x2) {
mbedAustin 11:cada08fc8a70 98 /* VFP/D16 Stack Frame: D0-D15/S0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
mbedAustin 11:cada08fc8a70 99 return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*4);
mbedAustin 11:cada08fc8a70 100 } else {
mbedAustin 11:cada08fc8a70 101 /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
mbedAustin 11:cada08fc8a70 102 return (U32 *)(p_TCB->tsk_stack + 8*4);
mbedAustin 11:cada08fc8a70 103 }
mbedAustin 11:cada08fc8a70 104 }
mbedAustin 11:cada08fc8a70 105
mbedAustin 11:cada08fc8a70 106 void rt_ret_val (P_TCB p_TCB, U32 v0) {
mbedAustin 11:cada08fc8a70 107 U32 *ret;
mbedAustin 11:cada08fc8a70 108
mbedAustin 11:cada08fc8a70 109 ret = rt_ret_regs(p_TCB);
mbedAustin 11:cada08fc8a70 110 ret[0] = v0;
mbedAustin 11:cada08fc8a70 111 }
mbedAustin 11:cada08fc8a70 112
mbedAustin 11:cada08fc8a70 113 void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
mbedAustin 11:cada08fc8a70 114 U32 *ret;
mbedAustin 11:cada08fc8a70 115
mbedAustin 11:cada08fc8a70 116 ret = rt_ret_regs(p_TCB);
mbedAustin 11:cada08fc8a70 117 ret[0] = v0;
mbedAustin 11:cada08fc8a70 118 ret[1] = v1;
mbedAustin 11:cada08fc8a70 119 }
mbedAustin 11:cada08fc8a70 120
mbedAustin 11:cada08fc8a70 121
mbedAustin 11:cada08fc8a70 122 /*----------------------------------------------------------------------------
mbedAustin 11:cada08fc8a70 123 * end of file
mbedAustin 11:cada08fc8a70 124 *---------------------------------------------------------------------------*/