mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-17 01:54:22 +00:00
e58a53fb72
This will be used by BL33 to get boot device and instance. Signed-off-by: Yann Gautier <yann.gautier@st.com> Signed-off-by: Mathieu Belou <mathieu.belou@st.com> Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
42 lines
954 B
C
42 lines
954 B
C
/*
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* Copyright (c) 2017-2018, ARM Limited and Contributors. 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 <dt-bindings/clock/stm32mp1-clks.h>
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#include <errno.h>
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#include <mmio.h>
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#include <platform_def.h>
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#include <stm32mp1_clk.h>
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#include <stm32mp1_context.h>
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#define TAMP_BOOT_ITF_BACKUP_REG_ID U(20)
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#define TAMP_BOOT_ITF_MASK U(0x0000FF00)
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#define TAMP_BOOT_ITF_SHIFT 8
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int stm32_save_boot_interface(uint32_t interface, uint32_t instance)
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{
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uint32_t tamp_clk_off = 0;
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uint32_t bkpr_itf_idx = tamp_bkpr(TAMP_BOOT_ITF_BACKUP_REG_ID);
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if (!stm32mp1_clk_is_enabled(RTCAPB)) {
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tamp_clk_off = 1;
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if (stm32mp1_clk_enable(RTCAPB) != 0) {
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return -EINVAL;
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}
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}
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mmio_clrsetbits_32(bkpr_itf_idx,
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TAMP_BOOT_ITF_MASK,
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((interface << 4) | (instance & 0xFU)) <<
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TAMP_BOOT_ITF_SHIFT);
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if (tamp_clk_off != 0U) {
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if (stm32mp1_clk_disable(RTCAPB) != 0) {
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return -EINVAL;
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}
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}
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return 0;
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}
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