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Dependencies:   F7_Ethernet WebSocketClient mbed mcp3008

Fork of Nucleo_F746ZG_Ethernet by Dieter Graef

mbed-rtos/rtx/TARGET_CORTEX_A/HAL_CA.c@0:f9b6112278fe, 2016-06-18 (annotated)

Committer:
DieterGraef
Date:
Sat Jun 18 10:49:12 2016 +0000
Revision:
0:f9b6112278fe
Ethernet for the NUCLEO STM32F746 Board Testprogram uses DHCP and NTP to set the clock

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:f9b6112278fe 1 /*----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 2 * RL-ARM - RTX
DieterGraef 0:f9b6112278fe 3 *----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 4 * Name: HAL_CA.C
DieterGraef 0:f9b6112278fe 5 * Purpose: Hardware Abstraction Layer for Cortex-A
DieterGraef 0:f9b6112278fe 6 * Rev.:
DieterGraef 0:f9b6112278fe 7 *----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 8 *
DieterGraef 0:f9b6112278fe 9 * Copyright (c) 2012 ARM Limited
DieterGraef 0:f9b6112278fe 10 * All rights reserved.
DieterGraef 0:f9b6112278fe 11 * Redistribution and use in source and binary forms, with or without
DieterGraef 0:f9b6112278fe 12 * modification, are permitted provided that the following conditions are met:
DieterGraef 0:f9b6112278fe 13 * - Redistributions of source code must retain the above copyright
DieterGraef 0:f9b6112278fe 14 * notice, this list of conditions and the following disclaimer.
DieterGraef 0:f9b6112278fe 15 * - Redistributions in binary form must reproduce the above copyright
DieterGraef 0:f9b6112278fe 16 * notice, this list of conditions and the following disclaimer in the
DieterGraef 0:f9b6112278fe 17 * documentation and/or other materials provided with the distribution.
DieterGraef 0:f9b6112278fe 18 * - Neither the name of ARM nor the names of its contributors may be used
DieterGraef 0:f9b6112278fe 19 * to endorse or promote products derived from this software without
DieterGraef 0:f9b6112278fe 20 * specific prior written permission.
DieterGraef 0:f9b6112278fe 21 *
DieterGraef 0:f9b6112278fe 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
DieterGraef 0:f9b6112278fe 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
DieterGraef 0:f9b6112278fe 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
DieterGraef 0:f9b6112278fe 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
DieterGraef 0:f9b6112278fe 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
DieterGraef 0:f9b6112278fe 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
DieterGraef 0:f9b6112278fe 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
DieterGraef 0:f9b6112278fe 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
DieterGraef 0:f9b6112278fe 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
DieterGraef 0:f9b6112278fe 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
DieterGraef 0:f9b6112278fe 32 * POSSIBILITY OF SUCH DAMAGE.
DieterGraef 0:f9b6112278fe 33 *---------------------------------------------------------------------------*/
DieterGraef 0:f9b6112278fe 34
DieterGraef 0:f9b6112278fe 35 #include "rt_TypeDef.h"
DieterGraef 0:f9b6112278fe 36 #include "RTX_Config.h"
DieterGraef 0:f9b6112278fe 37 #include "rt_HAL_CA.h"
DieterGraef 0:f9b6112278fe 38
DieterGraef 0:f9b6112278fe 39 /*--------------------------- os_init_context -------------------------------*/
DieterGraef 0:f9b6112278fe 40
DieterGraef 0:f9b6112278fe 41 void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
DieterGraef 0:f9b6112278fe 42 /* Prepare TCB and saved context for a first time start of a task. */
DieterGraef 0:f9b6112278fe 43 U32 *stk,i,size;
DieterGraef 0:f9b6112278fe 44
DieterGraef 0:f9b6112278fe 45 /* Prepare a complete interrupt frame for first task start */
DieterGraef 0:f9b6112278fe 46 size = p_TCB->priv_stack >> 2;
DieterGraef 0:f9b6112278fe 47 if (size == 0) {
DieterGraef 0:f9b6112278fe 48 size = (U16)os_stackinfo >> 2;
DieterGraef 0:f9b6112278fe 49 }
DieterGraef 0:f9b6112278fe 50 /* Write to the top of stack. */
DieterGraef 0:f9b6112278fe 51 stk = &p_TCB->stack[size];
DieterGraef 0:f9b6112278fe 52
DieterGraef 0:f9b6112278fe 53 /* Auto correct to 8-byte ARM stack alignment. */
DieterGraef 0:f9b6112278fe 54 if ((U32)stk & 0x04) {
DieterGraef 0:f9b6112278fe 55 stk--;
DieterGraef 0:f9b6112278fe 56 }
DieterGraef 0:f9b6112278fe 57
DieterGraef 0:f9b6112278fe 58 stk -= 16;
DieterGraef 0:f9b6112278fe 59
DieterGraef 0:f9b6112278fe 60 /* Initial PC and default CPSR */
DieterGraef 0:f9b6112278fe 61 stk[14] = (U32)task_body;
DieterGraef 0:f9b6112278fe 62 /* Task run mode is inherited from the startup file. */
DieterGraef 0:f9b6112278fe 63 /* (non-privileged USER or privileged SYSTEM mode) */
DieterGraef 0:f9b6112278fe 64 stk[15] = (os_flags & 1) ? INIT_CPSR_SYS : INIT_CPSR_USER;
DieterGraef 0:f9b6112278fe 65 /* Set T-bit if task function in Thumb mode. */
DieterGraef 0:f9b6112278fe 66 if ((U32)task_body & 1) {
DieterGraef 0:f9b6112278fe 67 stk[15] |= CPSR_T_BIT;
DieterGraef 0:f9b6112278fe 68 }
DieterGraef 0:f9b6112278fe 69 /* Assign a void pointer to R0. */
DieterGraef 0:f9b6112278fe 70 stk[8] = (U32)p_TCB->msg;
DieterGraef 0:f9b6112278fe 71 /* Clear R1-R12,LR registers. */
DieterGraef 0:f9b6112278fe 72 for (i = 0; i < 8; i++) {
DieterGraef 0:f9b6112278fe 73 stk[i] = 0;
DieterGraef 0:f9b6112278fe 74 }
DieterGraef 0:f9b6112278fe 75 for (i = 9; i < 14; i++) {
DieterGraef 0:f9b6112278fe 76 stk[i] = 0;
DieterGraef 0:f9b6112278fe 77 }
DieterGraef 0:f9b6112278fe 78
DieterGraef 0:f9b6112278fe 79 /* Initial Task stack pointer. */
DieterGraef 0:f9b6112278fe 80 p_TCB->tsk_stack = (U32)stk;
DieterGraef 0:f9b6112278fe 81
DieterGraef 0:f9b6112278fe 82 /* Task entry point. */
DieterGraef 0:f9b6112278fe 83 p_TCB->ptask = task_body;
DieterGraef 0:f9b6112278fe 84
DieterGraef 0:f9b6112278fe 85 /* Set a magic word for checking of stack overflow. */
DieterGraef 0:f9b6112278fe 86 p_TCB->stack[0] = MAGIC_WORD;
DieterGraef 0:f9b6112278fe 87 }
DieterGraef 0:f9b6112278fe 88
DieterGraef 0:f9b6112278fe 89
DieterGraef 0:f9b6112278fe 90 /*--------------------------- rt_ret_val ----------------------------------*/
DieterGraef 0:f9b6112278fe 91
DieterGraef 0:f9b6112278fe 92 static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
DieterGraef 0:f9b6112278fe 93 /* Get pointer to task return value registers (R0..R3) in Stack */
DieterGraef 0:f9b6112278fe 94 if (p_TCB->stack_frame & 0x4) {
DieterGraef 0:f9b6112278fe 95 /* NEON/D32 Stack Frame: D0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
DieterGraef 0:f9b6112278fe 96 return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*8);
DieterGraef 0:f9b6112278fe 97 } else if (p_TCB->stack_frame & 0x2) {
DieterGraef 0:f9b6112278fe 98 /* VFP/D16 Stack Frame: D0-D15/S0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
DieterGraef 0:f9b6112278fe 99 return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*4);
DieterGraef 0:f9b6112278fe 100 } else {
DieterGraef 0:f9b6112278fe 101 /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
DieterGraef 0:f9b6112278fe 102 return (U32 *)(p_TCB->tsk_stack + 8*4);
DieterGraef 0:f9b6112278fe 103 }
DieterGraef 0:f9b6112278fe 104 }
DieterGraef 0:f9b6112278fe 105
DieterGraef 0:f9b6112278fe 106 void rt_ret_val (P_TCB p_TCB, U32 v0) {
DieterGraef 0:f9b6112278fe 107 U32 *ret;
DieterGraef 0:f9b6112278fe 108
DieterGraef 0:f9b6112278fe 109 ret = rt_ret_regs(p_TCB);
DieterGraef 0:f9b6112278fe 110 ret[0] = v0;
DieterGraef 0:f9b6112278fe 111 }
DieterGraef 0:f9b6112278fe 112
DieterGraef 0:f9b6112278fe 113 void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
DieterGraef 0:f9b6112278fe 114 U32 *ret;
DieterGraef 0:f9b6112278fe 115
DieterGraef 0:f9b6112278fe 116 ret = rt_ret_regs(p_TCB);
DieterGraef 0:f9b6112278fe 117 ret[0] = v0;
DieterGraef 0:f9b6112278fe 118 ret[1] = v1;
DieterGraef 0:f9b6112278fe 119 }
DieterGraef 0:f9b6112278fe 120
DieterGraef 0:f9b6112278fe 121
DieterGraef 0:f9b6112278fe 122 /*----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 123 * end of file
DieterGraef 0:f9b6112278fe 124 *---------------------------------------------------------------------------*/