/*
 * Copyright (c) 2016, Linaro Limited
 * Copyright (c) 2014, STMicroelectronics International N.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <platform_config.h>

#include <stdint.h>
#include <string.h>

#include <drivers/gic.h>
#include <drivers/pl011.h>
#include <drivers/tzc400.h>

#include <arm.h>
#include <kernel/generic_boot.h>
#include <kernel/pm_stubs.h>
#include <trace.h>
#include <kernel/misc.h>
#include <kernel/panic.h>
#include <kernel/tee_time.h>
#include <tee/entry_fast.h>
#include <tee/entry_std.h>
#include <mm/core_memprot.h>
#include <mm/core_mmu.h>
#include <console.h>
#include <keep.h>
#include <initcall.h>

static void main_fiq(void);

static const struct thread_handlers handlers = {
	.std_smc = tee_entry_std,
	.fast_smc = tee_entry_fast,
	.fiq = main_fiq,
#if defined(CFG_WITH_ARM_TRUSTED_FW)
	.cpu_on = cpu_on_handler,
	.cpu_off = pm_do_nothing,
	.cpu_suspend = pm_do_nothing,
	.cpu_resume = pm_do_nothing,
	.system_off = pm_do_nothing,
	.system_reset = pm_do_nothing,
#else
	.cpu_on = pm_panic,
	.cpu_off = pm_panic,
	.cpu_suspend = pm_panic,
	.cpu_resume = pm_panic,
	.system_off = pm_panic,
	.system_reset = pm_panic,
#endif
};

static struct gic_data gic_data;

register_phys_mem(MEM_AREA_IO_SEC, CONSOLE_UART_BASE, PL011_REG_SIZE);

const struct thread_handlers *generic_boot_get_handlers(void)
{
	return &handlers;
}

#ifdef GIC_BASE

register_phys_mem(MEM_AREA_IO_SEC, GICD_BASE, GIC_DIST_REG_SIZE);
register_phys_mem(MEM_AREA_IO_SEC, GICC_BASE, GIC_DIST_REG_SIZE);

void main_init_gic(void)
{
	vaddr_t gicc_base;
	vaddr_t gicd_base;

	gicc_base = (vaddr_t)phys_to_virt(GIC_BASE + GICC_OFFSET,
					  MEM_AREA_IO_SEC);
	gicd_base = (vaddr_t)phys_to_virt(GIC_BASE + GICD_OFFSET,
					  MEM_AREA_IO_SEC);
	if (!gicc_base || !gicd_base)
		panic();

#if defined(PLATFORM_FLAVOR_fvp) || defined(PLATFORM_FLAVOR_juno) || \
	defined(PLATFORM_FLAVOR_qemu_armv8a)
	/* On ARMv8, GIC configuration is initialized in ARM-TF */
	gic_init_base_addr(&gic_data, gicc_base, gicd_base);
#else
	/* Initialize GIC */
	gic_init(&gic_data, gicc_base, gicd_base);
#endif
	itr_init(&gic_data.chip);
}
#endif

static void main_fiq(void)
{
	gic_it_handle(&gic_data);
}

static vaddr_t console_base(void)
{
	static void *va;

	if (cpu_mmu_enabled()) {
		if (!va)
			va = phys_to_virt(CONSOLE_UART_BASE, MEM_AREA_IO_SEC);
		return (vaddr_t)va;
	}
	return CONSOLE_UART_BASE;
}

void console_init(void)
{
	pl011_init(console_base(), CONSOLE_UART_CLK_IN_HZ, CONSOLE_BAUDRATE);
}

void console_putc(int ch)
{
	vaddr_t base = console_base();

	if (ch == '\n')
		pl011_putc('\r', base);
	pl011_putc(ch, base);
}

void console_flush(void)
{
	pl011_flush(console_base());
}

#ifdef IT_CONSOLE_UART
static enum itr_return console_itr_cb(struct itr_handler *h __unused)
{
	paddr_t uart_base = console_base();

	while (pl011_have_rx_data(uart_base)) {
		int ch __maybe_unused = pl011_getchar(uart_base);

		DMSG("cpu %zu: got 0x%x", get_core_pos(), ch);
	}
	return ITRR_HANDLED;
}

static struct itr_handler console_itr = {
	.it = IT_CONSOLE_UART,
	.flags = ITRF_TRIGGER_LEVEL,
	.handler = console_itr_cb,
};
KEEP_PAGER(console_itr);

static TEE_Result init_console_itr(void)
{
	itr_add(&console_itr);
	itr_enable(&console_itr);
	return TEE_SUCCESS;
}
driver_init(init_console_itr);
#endif

#ifdef CFG_TZC400
register_phys_mem(MEM_AREA_IO_SEC, TZC400_BASE, TZC400_REG_SIZE);

static TEE_Result init_tzc400(void)
{
	void *va;

	DMSG("Initializing TZC400");

	va = phys_to_virt(TZC400_BASE, MEM_AREA_IO_SEC);
	if (!va) {
		EMSG("TZC400 not mapped");
		panic();
	}

	tzc_init((vaddr_t)va);
	tzc_dump_state();

	return TEE_SUCCESS;
}

service_init(init_tzc400);
#endif /*CFG_TZC400*/