/*
 * Copyright (c) 2016-2021, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch_helpers.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/arm/cci.h>
#include <drivers/console.h>
#include <lib/mmio.h>
#include <lib/smccc.h>
#include <lib/xlat_tables/xlat_tables.h>
#include <plat/common/platform.h>
#include <services/arm_arch_svc.h>

#include <mtk_plat_common.h>
#include <mtk_sip_svc.h>
#include <plat_private.h>

struct atf_arg_t gteearg;

void clean_top_32b_of_param(uint32_t smc_fid,
				u_register_t *px1,
				u_register_t *px2,
				u_register_t *px3,
				u_register_t *px4)
{
	/* if parameters from SMC32. Clean top 32 bits */
	if (0 == (smc_fid & SMC_AARCH64_BIT)) {
		*px1 = *px1 & SMC32_PARAM_MASK;
		*px2 = *px2 & SMC32_PARAM_MASK;
		*px3 = *px3 & SMC32_PARAM_MASK;
		*px4 = *px4 & SMC32_PARAM_MASK;
	}
}

#if MTK_SIP_KERNEL_BOOT_ENABLE
static struct kernel_info k_info;

static void save_kernel_info(uint64_t pc,
			uint64_t r0,
			uint64_t r1,
			uint64_t k32_64)
{
	k_info.k32_64 = k32_64;
	k_info.pc = pc;

	if (LINUX_KERNEL_32 ==  k32_64) {
		/* for 32 bits kernel */
		k_info.r0 = 0;
		/* machtype */
		k_info.r1 = r0;
		/* tags */
		k_info.r2 = r1;
	} else {
		/* for 64 bits kernel */
		k_info.r0 = r0;
		k_info.r1 = r1;
	}
}

uint64_t get_kernel_info_pc(void)
{
	return k_info.pc;
}

uint64_t get_kernel_info_r0(void)
{
	return k_info.r0;
}

uint64_t get_kernel_info_r1(void)
{
	return k_info.r1;
}

uint64_t get_kernel_info_r2(void)
{
	return k_info.r2;
}

void boot_to_kernel(uint64_t x1, uint64_t x2, uint64_t x3, uint64_t x4)
{
	static uint8_t kernel_boot_once_flag = 0;

	if (0 == kernel_boot_once_flag) {
		kernel_boot_once_flag = 1;
		console_switch_state(CONSOLE_FLAG_BOOT);
		INFO("save kernel info\n");
		save_kernel_info(x1, x2, x3, x4);
		bl31_prepare_kernel_entry(x4);
		INFO("el3_exit\n");
		console_switch_state(CONSOLE_FLAG_RUNTIME);
	}
}
#endif

uint32_t plat_get_spsr_for_bl33_entry(void)
{
	uint32_t spsr = 0;

#if (ARM_ARCH_MAJOR > 7)
#ifndef KERNEL_IS_DEFAULT_64BIT
	unsigned int mode;
	unsigned int ee;
	unsigned long daif;

	INFO("Secondary bootloader is AArch32\n");
	mode = MODE32_svc;
	ee = 0;
	/*
	 * TODO: Choose async. exception bits if HYP mode is not
	 * implemented according to the values of SCR.{AW, FW} bits
	 */
	daif = DAIF_ABT_BIT | DAIF_IRQ_BIT | DAIF_FIQ_BIT;

	spsr = SPSR_MODE32(mode, 0, ee, daif);
#else
	INFO("Secondary bootloader is AArch64\n");

	spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
#endif
#endif

	return spsr;
}

/*****************************************************************************
 * plat_is_smccc_feature_available() - This function checks whether SMCCC
 *                                     feature is availabile for platform.
 * @fid: SMCCC function id
 *
 * Return SMC_OK if SMCCC feature is available and SMC_ARCH_CALL_NOT_SUPPORTED
 * otherwise.
 *****************************************************************************/
int32_t plat_is_smccc_feature_available(u_register_t fid)
{
	switch (fid) {
	case SMCCC_ARCH_SOC_ID:
		return SMC_ARCH_CALL_SUCCESS;
	default:
		return SMC_ARCH_CALL_NOT_SUPPORTED;
	}
}

int32_t plat_get_soc_version(void)
{
	uint32_t manfid = SOC_ID_SET_JEP_106(JEDEC_MTK_BKID, JEDEC_MTK_MFID);

	return (int32_t)(manfid | (SOC_CHIP_ID & SOC_ID_IMPL_DEF_MASK));
}

int32_t plat_get_soc_revision(void)
{
	return 0;
}
