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7079a942bd
DFD (Design for Debug) is a debugging tool, which scans flip-flops and dumps to internal RAM on the WDT reset. After system reboots, those values could be showed for debugging. TEST=build pass. BUG=b:244216434 Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.corp-partner.google.com> Change-Id: I468036131e941a46bc1ec12d33105146000730d8
44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
/*
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* Copyright (c) 2022, MediaTek Inc. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <lib/mmio.h>
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#include <dfd.h>
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#include <mtk_sip_svc.h>
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#include <plat_dfd.h>
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static u_register_t dfd_smc_dispatcher(u_register_t arg0, u_register_t arg1,
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u_register_t arg2, u_register_t arg3,
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void *handle, struct smccc_res *smccc_ret)
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{
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int ret = MTK_SIP_E_SUCCESS;
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switch (arg0) {
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case PLAT_MTK_DFD_SETUP_MAGIC:
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INFO("[%s] DFD setup call from kernel\n", __func__);
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dfd_setup(arg1, arg2, arg3);
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break;
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case PLAT_MTK_DFD_READ_MAGIC:
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/* only allow to access DFD register base + 0x200 */
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if (arg1 <= 0x200) {
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ret = mmio_read_32(MISC1_CFG_BASE + arg1);
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}
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break;
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case PLAT_MTK_DFD_WRITE_MAGIC:
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/* only allow to access DFD register base + 0x200 */
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if (arg1 <= 0x200) {
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sync_writel(MISC1_CFG_BASE + arg1, arg2);
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}
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break;
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default:
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ret = MTK_SIP_E_INVALID_PARAM;
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break;
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}
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return ret;
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}
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DECLARE_SMC_HANDLER(MTK_SIP_KERNEL_DFD, dfd_smc_dispatcher);
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