gxbb_sip_svc.c

/*
 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdint.h>

#include <platform_def.h>

#include <common/debug.h>
#include <common/runtime_svc.h>
#include <lib/mmio.h>

#include "gxbb_private.h"

/*******************************************************************************
 * This function is responsible for handling all SiP calls
 ******************************************************************************/
static uintptr_t gxbb_sip_handler(uint32_t smc_fid,
				  u_register_t x1, u_register_t x2,
				  u_register_t x3, u_register_t x4,
				  void *cookie, void *handle,
				  u_register_t flags)
{
	switch (smc_fid) {

	case GXBB_SM_GET_SHARE_MEM_INPUT_BASE:
		SMC_RET1(handle, GXBB_SHARE_MEM_INPUT_BASE);

	case GXBB_SM_GET_SHARE_MEM_OUTPUT_BASE:
		SMC_RET1(handle, GXBB_SHARE_MEM_OUTPUT_BASE);

	case GXBB_SM_EFUSE_READ:
	{
		void *dst = (void *)GXBB_SHARE_MEM_OUTPUT_BASE;
		uint64_t ret = gxbb_efuse_read(dst, (uint32_t)x1, x2);

		SMC_RET1(handle, ret);
	}
	case GXBB_SM_EFUSE_USER_MAX:
		SMC_RET1(handle,  gxbb_efuse_user_max());

	case GXBB_SM_JTAG_ON:
		scpi_jtag_set_state(GXBB_JTAG_STATE_ON, x1);
		SMC_RET1(handle, 0);

	case GXBB_SM_JTAG_OFF:
		scpi_jtag_set_state(GXBB_JTAG_STATE_OFF, x1);
		SMC_RET1(handle, 0);

	default:
		ERROR("BL31: Unhandled SIP SMC: 0x%08x\n", smc_fid);
		break;
	}

	SMC_RET1(handle, SMC_UNK);
}

DECLARE_RT_SVC(
	gxbb_sip_handler,

	OEN_SIP_START,
	OEN_SIP_END,
	SMC_TYPE_FAST,
	NULL,
	gxbb_sip_handler
);