53 lines
906 B
C
53 lines
906 B
C
/*
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* Copyright (c) 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 <lib/bakery_lock.h>
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#include <lib/mmio.h>
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#include <platform_def.h>
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static DEFINE_BAKERY_LOCK(mhu_lock);
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void mhu_secure_message_start(void)
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{
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bakery_lock_get(&mhu_lock);
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while (mmio_read_32(GXBB_HIU_MAILBOX_STAT_3) != 0)
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;
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}
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void mhu_secure_message_send(uint32_t msg)
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{
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mmio_write_32(GXBB_HIU_MAILBOX_SET_3, msg);
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while (mmio_read_32(GXBB_HIU_MAILBOX_STAT_3) != 0)
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;
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}
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uint32_t mhu_secure_message_wait(void)
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{
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uint32_t val;
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do {
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val = mmio_read_32(GXBB_HIU_MAILBOX_STAT_0);
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} while (val == 0);
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return val;
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}
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void mhu_secure_message_end(void)
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{
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mmio_write_32(GXBB_HIU_MAILBOX_CLR_0, 0xFFFFFFFF);
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bakery_lock_release(&mhu_lock);
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}
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void mhu_secure_init(void)
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{
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bakery_lock_init(&mhu_lock);
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mmio_write_32(GXBB_HIU_MAILBOX_CLR_3, 0xFFFFFFFF);
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}
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