blob: 561e97b2e4f2fdd63e3c1436ee94f21b20925db9 [file] [log] [blame]
/*
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch_helpers.h>
#include <assert.h>
#include <css_def.h>
#include <debug.h>
#include <delay_timer.h>
#include <platform.h>
#include <stdint.h>
#include "css_scp.h"
#include "../sds/sds.h"
int css_scp_boot_image_xfer(void *image, unsigned int image_size)
{
int ret;
unsigned int image_offset, image_flags;
ret = sds_init();
if (ret != SDS_OK) {
ERROR("SCP SDS initialization failed\n");
panic();
}
VERBOSE("Writing SCP image metadata\n");
image_offset = (uintptr_t) image - ARM_TRUSTED_SRAM_BASE;
ret = sds_struct_write(SDS_SCP_IMG_STRUCT_ID, SDS_SCP_IMG_ADDR_OFFSET,
&image_offset, SDS_SCP_IMG_ADDR_SIZE,
SDS_ACCESS_MODE_NON_CACHED);
if (ret != SDS_OK)
goto sds_fail;
ret = sds_struct_write(SDS_SCP_IMG_STRUCT_ID, SDS_SCP_IMG_SIZE_OFFSET,
&image_size, SDS_SCP_IMG_SIZE_SIZE,
SDS_ACCESS_MODE_NON_CACHED);
if (ret != SDS_OK)
goto sds_fail;
VERBOSE("Marking SCP image metadata as valid\n");
image_flags = SDS_SCP_IMG_VALID_FLAG_BIT;
ret = sds_struct_write(SDS_SCP_IMG_STRUCT_ID, SDS_SCP_IMG_FLAG_OFFSET,
&image_flags, SDS_SCP_IMG_FLAG_SIZE,
SDS_ACCESS_MODE_NON_CACHED);
if (ret != SDS_OK)
goto sds_fail;
return 0;
sds_fail:
ERROR("SCP SDS write to SCP IMG struct failed\n");
panic();
}
/*
* API to wait for SCP to signal till it's ready after booting the transferred
* image.
*/
int css_scp_boot_ready(void)
{
uint32_t scp_feature_availability_flags;
int ret, retry = CSS_SCP_READY_10US_RETRIES;
VERBOSE("Waiting for SCP RAM to complete its initialization process\n");
/* Wait for the SCP RAM Firmware to complete its initialization process */
while (retry > 0) {
ret = sds_struct_read(SDS_FEATURE_AVAIL_STRUCT_ID, 0,
&scp_feature_availability_flags,
SDS_FEATURE_AVAIL_SIZE,
SDS_ACCESS_MODE_NON_CACHED);
if (ret == SDS_ERR_STRUCT_NOT_FINALIZED)
continue;
if (ret != SDS_OK) {
ERROR(" sds_struct_read failed\n");
panic();
}
if (scp_feature_availability_flags &
SDS_FEATURE_AVAIL_SCP_RAM_READY_BIT)
return 0;
udelay(10);
retry--;
}
ERROR("Timeout of %d ms expired waiting for SCP RAM Ready flag\n",
CSS_SCP_READY_10US_RETRIES/100);
plat_panic_handler();
}