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| 1 | +/* mbed Microcontroller Library - stackheap |
| 2 | + * Setup a fixed single stack/heap memory model, |
| 3 | + * between the top of the RW/ZI region and the stackpointer |
| 4 | + ******************************************************************************* |
| 5 | + * Copyright (c) 2014, STMicroelectronics |
| 6 | + * All rights reserved. |
| 7 | + * |
| 8 | + * Redistribution and use in source and binary forms, with or without |
| 9 | + * modification, are permitted provided that the following conditions are met: |
| 10 | + * |
| 11 | + * 1. Redistributions of source code must retain the above copyright notice, |
| 12 | + * this list of conditions and the following disclaimer. |
| 13 | + * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 14 | + * this list of conditions and the following disclaimer in the documentation |
| 15 | + * and/or other materials provided with the distribution. |
| 16 | + * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| 17 | + * may be used to endorse or promote products derived from this software |
| 18 | + * without specific prior written permission. |
| 19 | + * |
| 20 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 21 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 23 | + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| 24 | + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 26 | + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 27 | + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 28 | + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 29 | + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | + ******************************************************************************* |
| 31 | + */ |
| 32 | + |
| 33 | +#ifdef __cplusplus |
| 34 | +extern "C" { |
| 35 | +#endif |
| 36 | + |
| 37 | +#include <rt_misc.h> |
| 38 | +#include <stdint.h> |
| 39 | + |
| 40 | +extern char Image$$RW_IRAM1$$ZI$$Limit[]; |
| 41 | + |
| 42 | +extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) { |
| 43 | + uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit; |
| 44 | + uint32_t sp_limit = __current_sp(); |
| 45 | + |
| 46 | + zi_limit = (zi_limit + 7) & ~0x7; // ensure zi_limit is 8-byte aligned |
| 47 | + |
| 48 | + struct __initial_stackheap r; |
| 49 | + r.heap_base = zi_limit; |
| 50 | + r.heap_limit = sp_limit; |
| 51 | + return r; |
| 52 | +} |
| 53 | + |
| 54 | +#ifdef __cplusplus |
| 55 | +} |
| 56 | +#endif |
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