bl31_plat_setup.c

/*
 * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>

#include <platform_def.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/coreboot.h>
#include <lib/mmio.h>
#include <plat_private.h>
#include <plat/common/platform.h>

/*
 * The next 2 constants identify the extents of the code & RO data region.
 * These addresses are used by the MMU setup code and therefore they must be
 * page-aligned.  It is the responsibility of the linker script to ensure that
 * __RO_START__ and __RO_END__ linker symbols refer to page-aligned addresses.
 */
IMPORT_SYM(unsigned long, __RO_START__,	BL31_RO_BASE);
IMPORT_SYM(unsigned long, __RO_END__,	BL31_RO_LIMIT);

static entry_point_info_t bl32_ep_info;
static entry_point_info_t bl33_ep_info;

/*******************************************************************************
 * 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.
 ******************************************************************************/
entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
{
	entry_point_info_t *next_image_info;

	next_image_info = (type == NON_SECURE) ? &bl33_ep_info : &bl32_ep_info;

	/* None of the images on this platform can have 0x0 as the entrypoint */
	if (next_image_info->pc)
		return next_image_info;
	else
		return NULL;
}

#pragma weak params_early_setup
void params_early_setup(void *plat_param_from_bl2)
{
}

/*******************************************************************************
 * Perform any BL3-1 early platform setup. 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)
{
	static console_16550_t console;
	struct rockchip_bl31_params *arg_from_bl2 = (struct rockchip_bl31_params *) arg0;
	void *plat_params_from_bl2 = (void *) arg1;

	params_early_setup(plat_params_from_bl2);

#if COREBOOT
	if (coreboot_serial.type)
		console_16550_register(coreboot_serial.baseaddr,
				       coreboot_serial.input_hertz,
				       coreboot_serial.baud,
				       &console);
#else
	console_16550_register(rockchip_get_uart_base(), PLAT_RK_UART_CLOCK,
			       PLAT_RK_UART_BAUDRATE, &console);
#endif

	VERBOSE("bl31_setup\n");

	/* Passing a NULL context is a critical programming error */
	assert(arg_from_bl2);

	assert(arg_from_bl2->h.type == PARAM_BL31);
	assert(arg_from_bl2->h.version >= VERSION_1);

	bl32_ep_info = *arg_from_bl2->bl32_ep_info;
	bl33_ep_info = *arg_from_bl2->bl33_ep_info;
}

/*******************************************************************************
 * Perform any BL3-1 platform setup code
 ******************************************************************************/
void bl31_platform_setup(void)
{
	generic_delay_timer_init();
	plat_rockchip_soc_init();

	/* Initialize the gic cpu and distributor interfaces */
	plat_rockchip_gic_driver_init();
	plat_rockchip_gic_init();
	plat_rockchip_pmu_init();
}

/*******************************************************************************
 * Perform the very early platform specific architectural setup here. At the
 * moment this is only intializes the mmu in a quick and dirty way.
 ******************************************************************************/
void bl31_plat_arch_setup(void)
{
	plat_cci_init();
	plat_cci_enable();
	plat_configure_mmu_el3(BL31_RO_BASE,
			       BL_COHERENT_RAM_END - BL31_RO_BASE,
			       BL31_RO_BASE,
			       BL31_RO_LIMIT,
			       BL_COHERENT_RAM_BASE,
			       BL_COHERENT_RAM_END);
}