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/*
* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* 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 <assert.h>
#include <arch_helpers.h>
#include <platform.h>
#include <bl2.h>
#include <bl_common.h>
/*******************************************************************************
* Declarations of linker defined symbols which will help us find the layout
* of trusted SRAM
******************************************************************************/
extern unsigned long __RO_START__;
extern unsigned long __RO_END__;
extern unsigned long __COHERENT_RAM_START__;
extern unsigned long __COHERENT_RAM_END__;
/*
* 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.
*/
#define BL2_RO_BASE (unsigned long)(&__RO_START__)
#define BL2_RO_LIMIT (unsigned long)(&__RO_END__)
/*
* The next 2 constants identify the extents of the coherent memory 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
* __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols refer to
* page-aligned addresses.
*/
#define BL2_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
#define BL2_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)
/* Pointer to memory visible to both BL2 and BL31 for passing data */
extern unsigned char **bl2_el_change_mem_ptr;
/* Data structure which holds the extents of the trusted SRAM for BL2 */
static meminfo bl2_tzram_layout
__attribute__ ((aligned(PLATFORM_CACHE_LINE_SIZE),
section("tzfw_coherent_mem")));
/*******************************************************************************
* Reference to structure which holds the arguments which need to be passed
* to BL31
******************************************************************************/
static bl31_args *bl2_to_bl31_args;
meminfo *bl2_plat_sec_mem_layout(void)
{
return &bl2_tzram_layout;
}
/*******************************************************************************
* This function returns a pointer to the memory that the platform has kept
* aside to pass all the information that BL31 could need.
******************************************************************************/
bl31_args *bl2_get_bl31_args_ptr(void)
{
return bl2_to_bl31_args;
}
/*******************************************************************************
* BL1 has passed the extents of the trusted SRAM that should be visible to BL2
* in x0. This memory layout is sitting at the base of the free trusted SRAM.
* Copy it to a safe loaction before its reclaimed by later BL2 functionality.
******************************************************************************/
void bl2_early_platform_setup(meminfo *mem_layout,
void *data)
{
/* Setup the BL2 memory layout */
bl2_tzram_layout.total_base = mem_layout->total_base;
bl2_tzram_layout.total_size = mem_layout->total_size;
bl2_tzram_layout.free_base = mem_layout->free_base;
bl2_tzram_layout.free_size = mem_layout->free_size;
bl2_tzram_layout.attr = mem_layout->attr;
bl2_tzram_layout.next = 0;
/* Initialize the platform config for future decision making */
platform_config_setup();
return;
}
/*******************************************************************************
* Perform platform specific setup. For now just initialize the memory location
* to use for passing arguments to BL31.
******************************************************************************/
void bl2_platform_setup()
{
/* Initialise the IO layer and register platform IO devices */
io_setup();
/* Use the Trusted DRAM for passing args to BL31 */
bl2_to_bl31_args = (bl31_args *) TZDRAM_BASE;
/* Populate the extents of memory available for loading BL33 */
bl2_to_bl31_args->bl33_meminfo.total_base = DRAM_BASE;
bl2_to_bl31_args->bl33_meminfo.total_size = DRAM_SIZE;
bl2_to_bl31_args->bl33_meminfo.free_base = DRAM_BASE;
bl2_to_bl31_args->bl33_meminfo.free_size = DRAM_SIZE;
bl2_to_bl31_args->bl33_meminfo.attr = 0;
bl2_to_bl31_args->bl33_meminfo.next = 0;
}
/*******************************************************************************
* 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 bl2_plat_arch_setup()
{
configure_mmu(&bl2_tzram_layout,
BL2_RO_BASE,
BL2_RO_LIMIT,
BL2_COHERENT_RAM_BASE,
BL2_COHERENT_RAM_LIMIT);
}
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