60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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* Author: Sagy Shih <sagy.shih@mediatek.com>
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*/
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#include <linux/platform_device.h>
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#include <mt_emi.h>
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#include "pasr_api_v1.h"
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/* acquire DRAM Setting for PASR/DPD */
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static unsigned int get_segment_nr(unsigned int rk_index)
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{
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unsigned int rank_size;
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unsigned int num_of_1;
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unsigned int i;
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rank_size = get_rank_size(rk_index) / get_ch_num();
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num_of_1 = 0;
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for (i = 0; i < 32; i++) {
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if (rank_size & 0x1)
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num_of_1++;
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rank_size = rank_size >> 1;
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}
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if (num_of_1 > 1)
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return 6;
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else
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return 8;
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}
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void acquire_dram_setting(struct basic_dram_setting *pasrdpd)
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{
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unsigned int ch, rk;
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pasrdpd->channel_nr = get_ch_num();
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for (ch = 0; ch < MAX_CH; ch++) {
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for (rk = 0; rk < MAX_RK; rk++) {
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if ((ch >= pasrdpd->channel_nr) ||
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(rk >= get_rk_num())) {
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pasrdpd->channel[ch].rank[rk].valid_rank =
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false;
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pasrdpd->channel[ch].rank[rk].rank_size = 0;
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pasrdpd->channel[ch].rank[rk].segment_nr = 0;
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continue;
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}
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pasrdpd->channel[ch].rank[rk].valid_rank = true;
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pasrdpd->channel[ch].rank[rk].rank_size =
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get_rank_size(rk) / (pasrdpd->channel_nr);
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pasrdpd->channel[ch].rank[rk].segment_nr =
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get_segment_nr(rk);
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}
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}
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}
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