ls_bl1_setup.c

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

#include <common/bl_common.h>
#include <common/debug.h>

#include "ls_16550.h"
#include "plat_ls.h"

/* Data structure which holds the extents of the trusted SRAM for BL1*/
static meminfo_t bl1_tzram_layout;

meminfo_t *bl1_plat_sec_mem_layout(void)
{
	return &bl1_tzram_layout;
}

/*******************************************************************************
 * BL1 specific platform actions shared between ARM standard platforms.
 ******************************************************************************/
void ls_bl1_early_platform_setup(void)
{
	static console_ls_16550_t console;

#if !LS1043_DISABLE_TRUSTED_WDOG
	/* TODO: Enable watchdog */

#endif

	/* Initialize the console to provide early debug support */
	console_ls_16550_register(LS_TF_UART_BASE, LS_TF_UART_CLOCK,
			       LS_TF_UART_BAUDRATE, &console);

	/* Allow BL1 to see the whole Trusted RAM */
	bl1_tzram_layout.total_base = LS_SRAM_BASE;
	bl1_tzram_layout.total_size = LS_SRAM_SIZE;
}

/******************************************************************************
 * Perform the very early platform specific architecture setup shared between
 * ARM standard platforms. This only does basic initialization. Later
 * architectural setup (bl1_arch_setup()) does not do anything platform
 * specific.
 *****************************************************************************/
void ls_bl1_plat_arch_setup(void)
{
	ls_setup_page_tables(bl1_tzram_layout.total_base,
			      bl1_tzram_layout.total_size,
			      BL_CODE_BASE,
			      BL1_CODE_END,
			      BL1_RO_DATA_BASE,
			      BL1_RO_DATA_END
#if USE_COHERENT_MEM
			      , BL_COHERENT_RAM_BASE,
			      BL_COHERENT_RAM_END
#endif
			     );
	VERBOSE("After setup the page tables\n");
#ifdef __aarch64__
	enable_mmu_el3(0);
#else
	enable_mmu_svc_mon(0);
#endif /* __aarch64__ */
	VERBOSE("After MMU enabled\n");
}

void bl1_plat_arch_setup(void)
{
	ls_bl1_plat_arch_setup();
}

/*
 * Perform the platform specific architecture setup shared between
 * ARM standard platforms.
 */
void ls_bl1_platform_setup(void)
{
	/* Initialise the IO layer and register platform IO devices */
	plat_ls_io_setup();
}

void bl1_plat_prepare_exit(entry_point_info_t *ep_info)
{
#if !LS1043_DISABLE_TRUSTED_WDOG
	/*TODO: Disable watchdog before leaving BL1 */
#endif
}