![](/media/cache/profiles/debfdc81854eac26ec993b55a659c6e1.jpg.50x50_q85.jpg)
mbed client lightswitch demo
Dependencies: mbed Socket lwip-eth lwip-sys lwip
Fork of mbed-client-classic-example-lwip by
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?
User | Revision | Line number | New contents of line |
---|---|---|---|
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 | *---------------------------------------------------------------------------*/ |