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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.h>
#include <arch_helpers.h>
#include <arm_def.h>
#include <assert.h>
#include <bl_common.h>
#include <console.h>
#include <mmio.h>
#include <plat_arm.h>
#include <platform.h>
/*
* The next 3 constants identify the extents of the code, RO data region and the
* limit of the BL31 image. 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__, __RO_END__ & __BL31_END__ linker symbols
* refer to page-aligned addresses.
*/
#define BL31_RO_BASE (unsigned long)(&__RO_START__)
#define BL31_RO_LIMIT (unsigned long)(&__RO_END__)
#define BL31_END (unsigned long)(&__BL31_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 BL31_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
#define BL31_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)
#endif
/*
* Placeholder variables for copying the arguments that have been passed to
* BL31 from BL2.
*/
static entry_point_info_t bl32_image_ep_info;
static entry_point_info_t bl33_image_ep_info;
/* Weak definitions may be overridden in specific ARM standard platform */
#pragma weak bl31_early_platform_setup
#pragma weak bl31_platform_setup
#pragma weak bl31_plat_arch_setup
#pragma weak bl31_plat_get_next_image_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;
assert(sec_state_is_valid(type));
next_image_info = (type == NON_SECURE)
? &bl33_image_ep_info : &bl32_image_ep_info;
/*
* None of the images on the ARM development platforms can have 0x0
* as the entrypoint
*/
if (next_image_info->pc)
return next_image_info;
else
return NULL;
}
/*******************************************************************************
* Perform any BL31 early platform setup common to ARM standard platforms.
* Here is an opportunity to copy parameters passed by the calling EL (S-EL1
* in BL2 & S-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 arm_bl31_early_platform_setup(bl31_params_t *from_bl2,
void *plat_params_from_bl2)
{
/* Initialize the console to provide early debug support */
console_init(PLAT_ARM_BOOT_UART_BASE, PLAT_ARM_BOOT_UART_CLK_IN_HZ,
ARM_CONSOLE_BAUDRATE);
#if RESET_TO_BL31
/* There are no parameters from BL2 if BL31 is a reset vector */
assert(from_bl2 == NULL);
assert(plat_params_from_bl2 == NULL);
#ifdef BL32_BASE
/* Populate entry point information for BL32 */
SET_PARAM_HEAD(&bl32_image_ep_info,
PARAM_EP,
VERSION_1,
0);
SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
bl32_image_ep_info.pc = BL32_BASE;
bl32_image_ep_info.spsr = arm_get_spsr_for_bl32_entry();
#endif /* BL32_BASE */
/* Populate entry point information for BL33 */
SET_PARAM_HEAD(&bl33_image_ep_info,
PARAM_EP,
VERSION_1,
0);
/*
* Tell BL31 where the non-trusted software image
* is located and the entry state information
*/
#ifdef PRELOADED_BL33_BASE
bl33_image_ep_info.pc = PRELOADED_BL33_BASE;
#else
bl33_image_ep_info.pc = plat_get_ns_image_entrypoint();
#endif /* PRELOADED_BL33_BASE */
bl33_image_ep_info.spsr = arm_get_spsr_for_bl33_entry();
SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
#else
/*
* Check params passed from BL2 should not be NULL,
*/
assert(from_bl2 != NULL);
assert(from_bl2->h.type == PARAM_BL31);
assert(from_bl2->h.version >= VERSION_1);
/*
* In debug builds, we pass a special value in 'plat_params_from_bl2'
* to verify platform parameters from BL2 to BL31.
* In release builds, it's not used.
*/
assert(((unsigned long long)plat_params_from_bl2) ==
ARM_BL31_PLAT_PARAM_VAL);
/*
* Copy BL32 (if populated by BL2) and BL33 entry point information.
* They are stored in Secure RAM, in BL2's address space.
*/
if (from_bl2->bl32_ep_info)
bl32_image_ep_info = *from_bl2->bl32_ep_info;
bl33_image_ep_info = *from_bl2->bl33_ep_info;
#endif
}
void bl31_early_platform_setup(bl31_params_t *from_bl2,
void *plat_params_from_bl2)
{
arm_bl31_early_platform_setup(from_bl2, plat_params_from_bl2);
/*
* Initialize Interconnect for this cluster during cold boot.
* No need for locks as no other CPU is active.
*/
plat_arm_interconnect_init();
/*
* Enable Interconnect coherency for the primary CPU's cluster.
* Earlier bootloader stages might already do this (e.g. Trusted
* Firmware's BL1 does it) but we can't assume so. There is no harm in
* executing this code twice anyway.
* Platform specific PSCI code will enable coherency for other
* clusters.
*/
plat_arm_interconnect_enter_coherency();
}
/*******************************************************************************
* Perform any BL31 platform setup common to ARM standard platforms
******************************************************************************/
void arm_bl31_platform_setup(void)
{
/* Initialize the GIC driver, cpu and distributor interfaces */
plat_arm_gic_driver_init();
plat_arm_gic_init();
#if RESET_TO_BL31
/*
* Do initial security configuration to allow DRAM/device access
* (if earlier BL has not already done so).
*/
plat_arm_security_setup();
#endif /* RESET_TO_BL31 */
/* Enable and initialize the System level generic timer */
mmio_write_32(ARM_SYS_CNTCTL_BASE + CNTCR_OFF,
CNTCR_FCREQ(0) | CNTCR_EN);
/* Allow access to the System counter timer module */
arm_configure_sys_timer();
/* Initialize power controller before setting up topology */
plat_arm_pwrc_setup();
}
/*******************************************************************************
* Perform any BL31 platform runtime setup prior to BL31 exit common to ARM
* standard platforms
******************************************************************************/
void arm_bl31_plat_runtime_setup(void)
{
/* Initialize the runtime console */
console_init(PLAT_ARM_BL31_RUN_UART_BASE, PLAT_ARM_BL31_RUN_UART_CLK_IN_HZ,
ARM_CONSOLE_BAUDRATE);
}
void bl31_platform_setup(void)
{
arm_bl31_platform_setup();
}
void bl31_plat_runtime_setup(void)
{
arm_bl31_plat_runtime_setup();
}
/*******************************************************************************
* 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 arm_bl31_plat_arch_setup(void)
{
arm_configure_mmu_el3(BL31_RO_BASE,
(BL31_END - BL31_RO_BASE),
BL31_RO_BASE,
BL31_RO_LIMIT
#if USE_COHERENT_MEM
, BL31_COHERENT_RAM_BASE,
BL31_COHERENT_RAM_LIMIT
#endif
);
}
void bl31_plat_arch_setup(void)
{
arm_bl31_plat_arch_setup();
}