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/*
* Copyright (c) 2015-2016, 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 <bl_common.h>
#include <console.h>
#include <debug.h>
#include <libfdt.h>
#include <platform_def.h>
#include "qemu_private.h"
#include <string.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.
*/
#define BL2_RO_BASE (unsigned long)(&__RO_START__)
#define BL2_RO_LIMIT (unsigned long)(&__RO_END__)
/*******************************************************************************
* This structure represents the superset of information that is passed to
* BL3-1, e.g. while passing control to it from BL2, bl31_params
* and other platform specific params
******************************************************************************/
typedef struct bl2_to_bl31_params_mem {
bl31_params_t bl31_params;
image_info_t bl31_image_info;
image_info_t bl32_image_info;
image_info_t bl33_image_info;
entry_point_info_t bl33_ep_info;
entry_point_info_t bl32_ep_info;
entry_point_info_t bl31_ep_info;
} bl2_to_bl31_params_mem_t;
static bl2_to_bl31_params_mem_t bl31_params_mem;
/* Data structure which holds the extents of the trusted SRAM for BL2 */
static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE);
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 */
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);
/* 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;
}
/* 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));
}
/*******************************************************************************
* 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 = QEMU_BL31_PLAT_PARAM_VAL;
#endif
return &bl31_params_mem.bl31_ep_info;
}
void bl2_early_platform_setup(meminfo_t *mem_layout)
{
/* Initialize the console to provide early debug support */
console_init(PLAT_QEMU_BOOT_UART_BASE, PLAT_QEMU_BOOT_UART_CLK_IN_HZ,
PLAT_QEMU_CONSOLE_BAUDRATE);
/* Setup the BL2 memory layout */
bl2_tzram_layout = *mem_layout;
plat_qemu_io_setup();
}
static void security_setup(void)
{
/*
* This is where a TrustZone address space controller and other
* security related peripherals, would be configured.
*/
}
static void update_dt(void)
{
int ret;
void *fdt = (void *)(uintptr_t)PLAT_QEMU_DT_BASE;
ret = fdt_open_into(fdt, fdt, PLAT_QEMU_DT_MAX_SIZE);
if (ret < 0) {
ERROR("Invalid Device Tree at %p: error %d\n", fdt, ret);
return;
}
if (dt_add_psci_node(fdt)) {
ERROR("Failed to add PSCI Device Tree node\n");
return;
}
if (dt_add_psci_cpu_enable_methods(fdt)) {
ERROR("Failed to add PSCI cpu enable methods in Device Tree\n");
return;
}
ret = fdt_pack(fdt);
if (ret < 0)
ERROR("Failed to pack Device Tree at %p: error %d\n", fdt, ret);
}
void bl2_platform_setup(void)
{
security_setup();
update_dt();
/* TODO Initialize timer */
}
void bl2_plat_arch_setup(void)
{
qemu_configure_mmu_el1(bl2_tzram_layout.total_base,
bl2_tzram_layout.total_size,
BL2_RO_BASE, BL2_RO_LIMIT,
BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END);
}
/*******************************************************************************
* Gets SPSR for BL32 entry
******************************************************************************/
static uint32_t qemu_get_spsr_for_bl32_entry(void)
{
/*
* The Secure Payload Dispatcher service is responsible for
* setting the SPSR prior to entry into the BL3-2 image.
*/
return 0;
}
/*******************************************************************************
* Gets SPSR for BL33 entry
******************************************************************************/
static uint32_t qemu_get_spsr_for_bl33_entry(void)
{
unsigned long el_status;
unsigned int mode;
uint32_t spsr;
/* 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;
mode = (el_status) ? MODE_EL2 : MODE_EL1;
/*
* TODO: Consider the possibility of specifying the SPSR in
* the FIP ToC and allowing the platform to have a say as
* well.
*/
spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
return spsr;
}
/*******************************************************************************
* Before calling this function BL3-1 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL3-1 and set SPSR and security state.
* On ARM standard platforms we only set the security state of the 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 BL3-2 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL3-2 and set SPSR and security state.
* On ARM standard platforms we only set the security state of the 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);
bl32_ep_info->spsr = qemu_get_spsr_for_bl32_entry();
}
/*******************************************************************************
* Before calling this function BL3-3 is loaded in memory and its entrypoint
* is set by load_image. This is a placeholder for the platform to change
* the entrypoint of BL3-3 and set SPSR and security state.
* On ARM standard platforms we only set the security state of the entrypoint
******************************************************************************/
void bl2_plat_set_bl33_ep_info(image_info_t *image,
entry_point_info_t *bl33_ep_info)
{
SET_SECURITY_STATE(bl33_ep_info->h.attr, NON_SECURE);
bl33_ep_info->spsr = qemu_get_spsr_for_bl33_entry();
}
/*******************************************************************************
* Populate the extents of memory available for loading BL32
******************************************************************************/
void bl2_plat_get_bl32_meminfo(meminfo_t *bl32_meminfo)
{
/*
* Populate the extents of memory available for loading BL32.
*/
bl32_meminfo->total_base = BL32_BASE;
bl32_meminfo->free_base = BL32_BASE;
bl32_meminfo->total_size = (BL32_MEM_BASE + BL32_MEM_SIZE) - BL32_BASE;
bl32_meminfo->free_size = (BL32_MEM_BASE + BL32_MEM_SIZE) - BL32_BASE;
}
/*******************************************************************************
* Populate the extents of memory available for loading BL33
******************************************************************************/
void bl2_plat_get_bl33_meminfo(meminfo_t *bl33_meminfo)
{
bl33_meminfo->total_base = NS_DRAM0_BASE;
bl33_meminfo->total_size = NS_DRAM0_SIZE;
bl33_meminfo->free_base = NS_DRAM0_BASE;
bl33_meminfo->free_size = NS_DRAM0_SIZE;
}
unsigned long plat_get_ns_image_entrypoint(void)
{
return NS_IMAGE_OFFSET;
}