53 lines
898 B
C
53 lines
898 B
C
|
/*
|
||
|
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
|
||
|
*
|
||
|
* SPDX-License-Identifier: BSD-3-Clause
|
||
|
*/
|
||
|
|
||
|
#include <bakery_lock.h>
|
||
|
#include <mmio.h>
|
||
|
#include <platform_def.h>
|
||
|
|
||
|
static DEFINE_BAKERY_LOCK(mhu_lock);
|
||
|
|
||
|
void mhu_secure_message_start(void)
|
||
|
{
|
||
|
bakery_lock_get(&mhu_lock);
|
||
|
|
||
|
while (mmio_read_32(GXBB_HIU_MAILBOX_STAT_3) != 0)
|
||
|
;
|
||
|
}
|
||
|
|
||
|
void mhu_secure_message_send(uint32_t msg)
|
||
|
{
|
||
|
mmio_write_32(GXBB_HIU_MAILBOX_SET_3, msg);
|
||
|
|
||
|
while (mmio_read_32(GXBB_HIU_MAILBOX_STAT_3) != 0)
|
||
|
;
|
||
|
}
|
||
|
|
||
|
uint32_t mhu_secure_message_wait(void)
|
||
|
{
|
||
|
uint32_t val;
|
||
|
|
||
|
do {
|
||
|
val = mmio_read_32(GXBB_HIU_MAILBOX_STAT_0);
|
||
|
} while (val == 0);
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
void mhu_secure_message_end(void)
|
||
|
{
|
||
|
mmio_write_32(GXBB_HIU_MAILBOX_CLR_0, 0xFFFFFFFF);
|
||
|
|
||
|
bakery_lock_release(&mhu_lock);
|
||
|
}
|
||
|
|
||
|
void mhu_secure_init(void)
|
||
|
{
|
||
|
bakery_lock_init(&mhu_lock);
|
||
|
|
||
|
mmio_write_32(GXBB_HIU_MAILBOX_CLR_3, 0xFFFFFFFF);
|
||
|
}
|