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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 <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <console.h>
#include <debug.h>
#include <platform.h>
#include <platform_def.h>
#include <string.h>
#include "juno_def.h"
#include "juno_private.h"
#include "scp_bootloader.h"
/*******************************************************************************
* Declarations of linker defined symbols which will help us find the layout
* of trusted RAM
******************************************************************************/
extern unsigned long __RO_START__;
extern unsigned long __RO_END__;
#if USE_COHERENT_MEM
extern unsigned long __COHERENT_RAM_START__;
extern unsigned long __COHERENT_RAM_END__;
#endif
/*
* 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__)
#if USE_COHERENT_MEM
/*
* 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__)
#endif
/* Data structure which holds the extents of the trusted RAM for BL2 */
static meminfo_t bl2_tzram_layout
__attribute__ ((aligned(PLATFORM_CACHE_LINE_SIZE)));
/*******************************************************************************
* Structure which holds the arguments which need to be passed to BL3-1
******************************************************************************/
static bl2_to_bl31_params_mem_t bl31_params_mem;
meminfo_t *bl2_plat_sec_mem_layout(void)
{
return &bl2_tzram_layout;
}
/*******************************************************************************
* This function assigns a pointer to the memory that the platform has kept
* aside to pass platform specific and trusted firmware related information
* to BL31. This memory is allocated by allocating memory to
* bl2_to_bl31_params_mem_t structure which is a superset of all the
* structure whose information is passed to BL31
* NOTE: This function should be called only once and should be done
* before generating params to BL31
******************************************************************************/
bl31_params_t *bl2_plat_get_bl31_params(void)
{
bl31_params_t *bl2_to_bl31_params;
/*
* Initialise the memory for all the arguments that needs to
* be passed to BL3-1
*/
memset(&bl31_params_mem, 0, sizeof(bl2_to_bl31_params_mem_t));
/* Assign memory for TF related information */
bl2_to_bl31_params = &bl31_params_mem.bl31_params;
SET_PARAM_HEAD(bl2_to_bl31_params, PARAM_BL31, VERSION_1, 0);
/* Fill BL3-1 related information */
bl2_to_bl31_params->bl31_image_info = &bl31_params_mem.bl31_image_info;
SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, PARAM_IMAGE_BINARY,
VERSION_1, 0);
/* Fill BL3-2 related information if it exists */
#if BL32_BASE
bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info;
SET_PARAM_HEAD(bl2_to_bl31_params->bl32_ep_info, PARAM_EP,
VERSION_1, 0);
bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info;
SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, PARAM_IMAGE_BINARY,
VERSION_1, 0);
#endif
/* Fill BL3-3 related information */
bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info;
SET_PARAM_HEAD(bl2_to_bl31_params->bl33_ep_info,
PARAM_EP, VERSION_1, 0);
/* BL3-3 expects to receive the primary CPU MPID (through x0) */
bl2_to_bl31_params->bl33_ep_info->args.arg0 = 0xffff & read_mpidr();
bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info;
SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, PARAM_IMAGE_BINARY,
VERSION_1, 0);
return bl2_to_bl31_params;
}
/*******************************************************************************
* This function returns a pointer to the shared memory that the platform
* has kept to point to entry point information of BL31 to BL2
******************************************************************************/
struct entry_point_info *bl2_plat_get_bl31_ep_info(void)
{
#if DEBUG
bl31_params_mem.bl31_ep_info.args.arg1 = JUNO_BL31_PLAT_PARAM_VAL;
#endif
return &bl31_params_mem.bl31_ep_info;
}
/*******************************************************************************
* BL1 has passed the extents of the trusted RAM that should be visible to BL2
* in x0. This memory layout is sitting at the base of the free trusted RAM.
* Copy it to a safe loaction before its reclaimed by later BL2 functionality.
******************************************************************************/
void bl2_early_platform_setup(meminfo_t *mem_layout)
{
/* Initialize the console to provide early debug support */
console_init(PL011_UART2_BASE, PL011_UART2_CLK_IN_HZ, PL011_BAUDRATE);
/* Setup the BL2 memory layout */
bl2_tzram_layout = *mem_layout;
/* Initialise the IO layer and register platform IO devices */
io_setup();
}
/*******************************************************************************
* Perform platform specific setup, i.e. initialize the IO layer, load BL3-0
* image and initialise the memory location to use for passing arguments to
* BL3-1.
******************************************************************************/
void bl2_platform_setup(void)
{
/* Initialize the secure environment */
plat_security_setup();
}
/* Flush the TF params and the TF plat params */
void bl2_plat_flush_bl31_params(void)
{
flush_dcache_range((unsigned long)&bl31_params_mem,
sizeof(bl2_to_bl31_params_mem_t));
}
/*******************************************************************************
* 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(void)
{
configure_mmu_el1(bl2_tzram_layout.total_base,
bl2_tzram_layout.total_size,
BL2_RO_BASE,
BL2_RO_LIMIT
#if USE_COHERENT_MEM
, BL2_COHERENT_RAM_BASE,
BL2_COHERENT_RAM_LIMIT
#endif
);
}
/*******************************************************************************
* Populate the extents of memory available for loading BL3-0, i.e. anywhere
* in trusted RAM as long as it doesn't overwrite BL2.
******************************************************************************/
void bl2_plat_get_bl30_meminfo(meminfo_t *bl30_meminfo)
{
*bl30_meminfo = bl2_tzram_layout;
}
/*******************************************************************************
* Transfer BL3-0 from Trusted RAM using the SCP Download protocol.
* Return 0 on success, -1 otherwise.
******************************************************************************/
int bl2_plat_handle_bl30(image_info_t *bl30_image_info)
{
int ret;
ret = scp_bootloader_transfer((void *)bl30_image_info->image_base,
bl30_image_info->image_size);
if (ret == 0)
INFO("BL2: BL3-0 transferred to SCP\n\r");
else
ERROR("BL2: BL3-0 transfer failure\n\r");
return ret;
}
/*******************************************************************************
* Before calling this function BL31 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL31 and set SPSR and security state.
* On Juno we are only setting the security state, entrypoint
******************************************************************************/
void bl2_plat_set_bl31_ep_info(image_info_t *bl31_image_info,
entry_point_info_t *bl31_ep_info)
{
SET_SECURITY_STATE(bl31_ep_info->h.attr, SECURE);
bl31_ep_info->spsr = SPSR_64(MODE_EL3, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
}
/*******************************************************************************
* Before calling this function BL32 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL32 and set SPSR and security state.
* On Juno we are only setting the security state, entrypoint
******************************************************************************/
void bl2_plat_set_bl32_ep_info(image_info_t *bl32_image_info,
entry_point_info_t *bl32_ep_info)
{
SET_SECURITY_STATE(bl32_ep_info->h.attr, SECURE);
/*
* The Secure Payload Dispatcher service is responsible for
* setting the SPSR prior to entry into the BL32 image.
*/
bl32_ep_info->spsr = 0;
}
/*******************************************************************************
* Before calling this function BL33 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL33 and set SPSR and security state.
* On Juno we are only setting the security state, entrypoint
******************************************************************************/
void bl2_plat_set_bl33_ep_info(image_info_t *image,
entry_point_info_t *bl33_ep_info)
{
unsigned long el_status;
unsigned int mode;
/* Figure out what mode we enter the non-secure world in */
el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
el_status &= ID_AA64PFR0_ELX_MASK;
if (el_status)
mode = MODE_EL2;
else
mode = MODE_EL1;
/*
* TODO: Consider the possibility of specifying the SPSR in
* the FIP ToC and allowing the platform to have a say as
* well.
*/
bl33_ep_info->spsr = SPSR_64(mode, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
SET_SECURITY_STATE(bl33_ep_info->h.attr, NON_SECURE);
}
/*******************************************************************************
* Populate the extents of memory available for loading BL3-2
******************************************************************************/
void bl2_plat_get_bl32_meminfo(meminfo_t *bl32_meminfo)
{
/*
* Populate the extents of memory available for loading BL3-2.
*/
bl32_meminfo->total_base = BL32_BASE;
bl32_meminfo->free_base = BL32_BASE;
bl32_meminfo->total_size =
(TSP_SEC_MEM_BASE + TSP_SEC_MEM_SIZE) - BL32_BASE;
bl32_meminfo->free_size =
(TSP_SEC_MEM_BASE + TSP_SEC_MEM_SIZE) - BL32_BASE;
}
/*******************************************************************************
* Populate the extents of memory available for loading BL3-3
******************************************************************************/
void bl2_plat_get_bl33_meminfo(meminfo_t *bl33_meminfo)
{
bl33_meminfo->total_base = DRAM_NS_BASE;
bl33_meminfo->total_size = DRAM_NS_SIZE;
bl33_meminfo->free_base = DRAM_NS_BASE;
bl33_meminfo->free_size = DRAM_NS_SIZE;
}