mirror of
https://github.com/trezor/trezor-firmware.git
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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "alloc_only.h"
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#include "common.h"
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#include "memzero.h"
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extern uint32_t _heap_start;
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extern uint32_t _heap_end;
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uint32_t* alloc_memory;
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void* alloc_only(uint16_t size) {
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void* ptr = NULL;
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size_t aligned_size = size;
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if (size % 4 != 0) {
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aligned_size++;
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}
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if ((alloc_memory + aligned_size) <= &_heap_end) {
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ptr = alloc_memory;
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alloc_memory += aligned_size;
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}
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return ptr;
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}
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void alloc_only_init(bool clear) {
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alloc_memory = &_heap_start;
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if (clear) {
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size_t len = (&_heap_end - &_heap_start);
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memzero(alloc_memory, len);
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}
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}
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