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
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9 * modification, are permitted provided that the following conditions are met:
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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.
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
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *******************************************************************************
40 extern char Image$$RW_IRAM1$$ZI$$Limit[];
42 extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) {
43 uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit;
44 uint32_t sp_limit = __current_sp();
46 zi_limit = (zi_limit + 7) & ~0x7; // ensure zi_limit is 8-byte aligned
48 struct __initial_stackheap r;
49 r.heap_base = zi_limit;
50 r.heap_limit = sp_limit;