1 | /* |
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2 | * SPDX-License-Identifier: BSD-2-Clause |
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3 | * |
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4 | * Copyright (C) 2021 OAR Corporation |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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16 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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19 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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20 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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21 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 | * POSSIBILITY OF SUCH DAMAGE. |
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26 | */ |
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27 | |
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28 | #ifdef HAVE_CONFIG_H |
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29 | #include "config.h" |
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30 | #endif |
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31 | |
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32 | #include <rtems/score/stack.h> |
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33 | #include <rtems/score/thread.h> |
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34 | #include <rtems/score/assert.h> |
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35 | |
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36 | /** |
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37 | * @brief Default stack allocator allocate for idle handler. |
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38 | * |
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39 | * The allocate for idle handler is optional even when the user thread stack |
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40 | * allocator and deallocator are configured. |
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41 | * |
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42 | * The default allocator for IDLE thread stacks gets the memory from a |
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43 | * statically allocated area provided via confdefs.h. |
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44 | * |
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45 | * @param cpu_index Index of the CPU for the IDLE thread using this stack |
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46 | * @param stack_size The size of the stack area to allocate in bytes. |
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47 | * |
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48 | * @retval NULL Not enough memory (never returned). |
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49 | * @retval other Pointer to begin of stack area. |
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50 | */ |
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51 | static void *_Stack_Allocator_allocate_for_idle_default( |
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52 | uint32_t cpu_index, |
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53 | size_t stack_size |
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54 | ) |
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55 | { |
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56 | #if defined(RTEMS_SMP) |
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57 | return &_Thread_Idle_stacks[ cpu_index * stack_size ]; |
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58 | #else |
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59 | _Assert( cpu_index == 0 ); |
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60 | return &_Thread_Idle_stacks[ 0 ]; |
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61 | #endif |
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62 | } |
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63 | |
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64 | const Stack_Allocator_allocate_for_idle _Stack_Allocator_allocate_for_idle = |
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65 | _Stack_Allocator_allocate_for_idle_default; |
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