/*
 * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
 *
 * Copyright (C) 2017-2023 Nuvoton Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>

#include <arch.h>
#include <arch_helpers.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/console.h>
#include <drivers/generic_delay_timer.h>
#include <drivers/ti/uart/uart_16550.h>
#include <lib/debugfs.h>
#include <lib/extensions/ras.h>
#include <lib/mmio.h>
#include <lib/xlat_tables/xlat_tables_compat.h>
#include <npcm845x_clock.h>
#include <npcm845x_gcr.h>
#include <npcm845x_lpuart.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
#include <plat_npcm845x.h>
#include <platform_def.h>

/*
 * Placeholder variables for copying the arguments that have been passed to
 * BL31 from BL2.
 */
static entry_point_info_t bl32_image_ep_info;
static entry_point_info_t bl33_image_ep_info;

#if !RESET_TO_BL31
/*
 * Check that BL31_BASE is above ARM_FW_CONFIG_LIMIT. The reserved page
 * is required for SOC_FW_CONFIG/TOS_FW_CONFIG passed from BL2.
 */
/* CASSERT(BL31_BASE >= ARM_FW_CONFIG_LIMIT, assert_bl31_base_overflows); */
#endif /* !RESET_TO_BL31 */

#define MAP_BL31_TOTAL		MAP_REGION_FLAT( \
					BL31_START, \
					BL31_END - BL31_START, \
					MT_MEMORY | MT_RW | EL3_PAS)

#if RECLAIM_INIT_CODE
IMPORT_SYM(unsigned long, __INIT_CODE_START__, BL_INIT_CODE_BASE);
IMPORT_SYM(unsigned long, __INIT_CODE_END__, BL_CODE_END_UNALIGNED);

#define	BL_INIT_CODE_END	((BL_CODE_END_UNALIGNED + PAGE_SIZE - 1) & \
					~(PAGE_SIZE - 1))

#define MAP_BL_INIT_CODE	MAP_REGION_FLAT( \
					BL_INIT_CODE_BASE, \
					BL_INIT_CODE_END - \
					BL_INIT_CODE_BASE, \
					MT_CODE | MT_SECURE)
#endif /* RECLAIM_INIT_CODE */

#if SEPARATE_NOBITS_REGION
#define MAP_BL31_NOBITS		MAP_REGION_FLAT( \
					BL31_NOBITS_BASE, \
					BL31_NOBITS_LIMIT - \
					BL31_NOBITS_BASE, \
					MT_MEMORY | MT_RW | EL3_PAS)
#endif /* SEPARATE_NOBITS_REGION */

/******************************************************************************
 * Return a pointer to the 'entry_point_info' structure of the next image
 * for the security state specified. BL33 corresponds to the non-secure
 * image type while BL32 corresponds to the secure image type.
 * A NULL pointer is returned if the image does not exist.
 *****************************************************************************/
struct entry_point_info *bl31_plat_get_next_image_ep_info(uint32_t type)
{
	entry_point_info_t *next_image_info;

	assert(sec_state_is_valid(type));
	next_image_info = (type == NON_SECURE)
			? &bl33_image_ep_info : &bl32_image_ep_info;
/*
 * None of the images on the ARM development platforms can have 0x0
 * as the entrypoint
 */
	if (next_image_info->pc) {
		return next_image_info;
	} else {
		return NULL;
	}
}

int board_uart_init(void)
{
	unsigned long UART_BASE_ADDR;
	static console_t console;

#ifdef CONFIG_TARGET_ARBEL_PALLADIUM
	UART_Init(UART0_DEV, UART_MUX_MODE1,
				UART_BAUDRATE_115200);
	UART_BASE_ADDR = npcm845x_get_base_uart(UART0_DEV);
#else
	UART_BASE_ADDR = npcm845x_get_base_uart(UART0_DEV);
#endif /* CONFIG_TARGET_ARBEL_PALLADIUM */

/*
 * Register UART w/o initialization -
 * A clock rate of zero means to skip the initialisation.
 */
	console_16550_register((uintptr_t)UART_BASE_ADDR, 0, 0, &console);

	return 0;
}

unsigned int plat_get_syscnt_freq2(void)
{
	/*
	 * Do not overwrite the value set by BootBlock
	 */
	return (unsigned int)read_cntfrq_el0();
}

/******************************************************************************
 * Perform any BL31 early platform setup common to ARM standard platforms.
 * Here is an opportunity to copy parameters passed by the calling EL (S-EL1
 * in BL2 & EL3 in BL1) before they are lost (potentially). This needs to be
 * done before the MMU is initialized so that the memory layout can be used
 * while creating page tables. BL2 has flushed this information to memory,
 * so  we are guaranteed to pick up good data.
 *****************************************************************************/
void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
		u_register_t arg2, u_register_t arg3)
{
	arg0 = arg1 = arg2 = arg3 = 0;
#if RESET_TO_BL31
	void *from_bl2 = (void *)arg0;
	void *plat_params_from_bl2 = (void *)arg3;

	if (from_bl2 != NULL) {
		assert(from_bl2 == NULL);
	}

	if (plat_params_from_bl2 != NULL) {
		assert(plat_params_from_bl2 == NULL);
	}
#endif /* RESET_TO_BL31 */

/* Initialize Delay timer */
	 generic_delay_timer_init();

/* Do Specific Board/Chip initializations */
	board_uart_init();

#if RESET_TO_BL31
	/* There are no parameters from BL2 if BL31 is a reset vector */
	assert(from_bl2 == NULL);
	assert(plat_params_from_bl2 == NULL);

#ifdef BL32_BASE
	/* Populate entry point information for BL32 */
	SET_PARAM_HEAD(&bl32_image_ep_info,
					PARAM_EP,
					VERSION_1,
					0);
	SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
	bl32_image_ep_info.pc = BL32_BASE;
	bl32_image_ep_info.spsr = arm_get_spsr_for_bl32_entry();

#if defined(SPD_spmd)
/*
 * SPM (hafnium in secure world) expects SPM Core manifest base address
 * in x0, which in !RESET_TO_BL31 case loaded after base of non shared
 * SRAM(after 4KB offset of SRAM). But in RESET_TO_BL31 case all non
 * shared SRAM is allocated to BL31, so to avoid overwriting of manifest
 * keep it in the last page.
 */
	bl32_image_ep_info.args.arg0 = ARM_TRUSTED_SRAM_BASE +
					PLAT_ARM_TRUSTED_SRAM_SIZE - PAGE_SIZE;
#endif /* SPD_spmd */
#endif /* BL32_BASE */

/* Populate entry point information for BL33 */
		SET_PARAM_HEAD(&bl33_image_ep_info,
					PARAM_EP,
					VERSION_1,
					0);

/*
 * Tell BL31 where the non-trusted software image
 * is located and the entry state information
 */
		bl33_image_ep_info.pc = plat_get_ns_image_entrypoint();
		/* Generic ARM code will switch to EL2, revert to EL1 */
		bl33_image_ep_info.spsr = arm_get_spsr_for_bl33_entry();
		bl33_image_ep_info.spsr &= ~0x8;
		bl33_image_ep_info.spsr |= 0x4;

		SET_SECURITY_STATE(bl33_image_ep_info.h.attr, (uint32_t)NON_SECURE);

#if defined(SPD_spmd) && !(ARM_LINUX_KERNEL_AS_BL33)
/*
 * Hafnium in normal world expects its manifest address in x0,
 * which is loaded at base of DRAM.
 */
		bl33_image_ep_info.args.arg0 = (u_register_t)ARM_DRAM1_BASE;
#endif /* SPD_spmd && !ARM_LINUX_KERNEL_AS_BL33 */

#if ARM_LINUX_KERNEL_AS_BL33
/*
 * According to the file ``Documentation/arm64/booting.txt`` of the
 * Linux kernel tree, Linux expects the physical address of the device
 * tree blob (DTB) in x0, while x1-x3 are reserved for future use and
 * must be 0.
 */
	bl33_image_ep_info.args.arg0 = (u_register_t)ARM_PRELOADED_DTB_BASE;
	bl33_image_ep_info.args.arg1 = 0U;
	bl33_image_ep_info.args.arg2 = 0U;
	bl33_image_ep_info.args.arg3 = 0U;
#endif /* ARM_LINUX_KERNEL_AS_BL33 */

#else /* RESET_TO_BL31 */
/*
 * In debug builds, we pass a special value in 'plat_params_from_bl2'
 * to verify platform parameters from BL2 to BL31.
 * In release builds, it's not used.
 */
	assert(((unsigned long long)plat_params_from_bl2) ==
			ARM_BL31_PLAT_PARAM_VAL);

/*
 * Check params passed from BL2 should not be NULL,
 */
	bl_params_t *params_from_bl2 = (bl_params_t *)from_bl2;

	assert(params_from_bl2 != NULL);
	assert(params_from_bl2->h.type == PARAM_BL_PARAMS);
	assert(params_from_bl2->h.version >= VERSION_2);

	bl_params_node_t *bl_params = params_from_bl2->head;

/*
 * Copy BL33 and BL32 (if present), entry point information.
 * They are stored in Secure RAM, in BL2's address space.
 */
	while (bl_params != NULL) {
		if (bl_params->image_id == BL32_IMAGE_ID) {
			bl32_image_ep_info = *bl_params->ep_info;
		}

		if (bl_params->image_id == BL33_IMAGE_ID) {
			bl33_image_ep_info = *bl_params->ep_info;
		}

		bl_params = bl_params->next_params_info;
	}

	if (bl33_image_ep_info.pc == 0U) {
		panic();
	}
#endif /* RESET_TO_BL31 */
}

/*******************************************************************************
 * Perform any BL31 platform setup common to ARM standard platforms
 ******************************************************************************/
void bl31_platform_setup(void)
{
/* Initialize the GIC driver, cpu and distributor interfaces */
	plat_gic_driver_init();
	plat_gic_init();

#if RESET_TO_BL31
#if defined(PLAT_ARM_MEM_PROT_ADDR)
	arm_nor_psci_do_dyn_mem_protect();
#endif /* PLAT_ARM_MEM_PROT_ADDR */
#else
/*
 * In this soluction, we also do the security initialzation
 * even when BL31 is not in the reset vector
 */
	npcm845x_security_setup();
#endif /* RESET_TO_BL31 */

/* Enable and initialize the System level generic timer */
	mmio_write_32(ARM_SYS_CNTCTL_BASE + CNTCR_OFF,
			CNTCR_FCREQ(0U) | CNTCR_EN);

/* Initialize power controller before setting up topology */
	plat_arm_pwrc_setup();

#if RAS_EXTENSION
	ras_init();
#endif

#if USE_DEBUGFS
	debugfs_init();
#endif /* USE_DEBUGFS */
}

void arm_console_runtime_init(void)
{
/* Added in order to ignore the original weak function */
}

void plat_arm_program_trusted_mailbox(uintptr_t address)
{
/*
 * now we don't use ARM mailbox,
 * so that function added to ignore the weak one
 */
}

void __init bl31_plat_arch_setup(void)
{
	npcm845x_bl31_plat_arch_setup();
}

void __init plat_arm_pwrc_setup(void)
{
/* NPCM850 is always powered so no need for power control */
}

void __init npcm845x_bl31_plat_arch_setup(void)
{
	const mmap_region_t bl_regions[] = {
		MAP_BL31_TOTAL,
		ARM_MAP_BL_RO,
#if USE_COHERENT_MEM
		ARM_MAP_BL_COHERENT_RAM,
#endif /* USE_COHERENT_MEM */
		ARM_MAP_SHARED_RAM,
		{0}
	};
	setup_page_tables(bl_regions, plat_arm_get_mmap());
	enable_mmu_el3(0U);
}