2025-09-30 11:56:06 +08:00
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/*
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* Copyright (c) 2022-2024, ArtInChip Technology Co., Ltd
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Authors: Xiong Hao <hao.xiong@artinchip.com>
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*/
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#include "ssram.h"
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static unsigned int ssram_bitmap = 0;
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unsigned int aic_ssram_alloc(unsigned int siz)
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{
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u64 mask;
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int i, unitcnt;
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unsigned int addr;
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if (siz <= 0)
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return 0;
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unitcnt = DIV_ROUND_UP(siz, SSRAM_UNIT_SIZE);
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mask = GENMASK(unitcnt - 1, 0);
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for (i = 0; i < (SECURE_SRAM_SIZE / SSRAM_UNIT_SIZE); i++) {
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mask = (mask << i);
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if (!(ssram_bitmap & mask)) {
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ssram_bitmap |= mask;
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break;
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}
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}
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if (i >= (SECURE_SRAM_SIZE / SSRAM_UNIT_SIZE))
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return 0;
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addr = (unsigned int)SECURE_SRAM_BASE;
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addr += (SSRAM_UNIT_SIZE * i);
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return addr;
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}
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int aic_ssram_free(unsigned int ssram_addr, unsigned int siz)
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{
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unsigned int addr;
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int i, unitcnt;
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unsigned int mask;
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if (siz <= 0)
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return 0;
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addr = (unsigned int)SECURE_SRAM_BASE;
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if (ssram_addr < addr)
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return -EINVAL;
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i = (ssram_addr - addr) / SSRAM_UNIT_SIZE;
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if (i >= SECURE_SRAM_SIZE / SSRAM_UNIT_SIZE)
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return -EINVAL;
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unitcnt = DIV_ROUND_UP(siz, SSRAM_UNIT_SIZE);
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mask = GENMASK(unitcnt - 1 + i, i);
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ssram_bitmap &= (~mask);
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return 0;
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}
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