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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.h>
#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <bl31.h>
#include <console.h>
#include <fvp_def.h>
#include <mmio.h>
#include <platform.h>
#include <stddef.h>
#include "drivers/pwrc/fvp_pwrc.h"
#include "fvp_private.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 BL31_RO_BASE (unsigned long)(&__RO_START__)
#define BL31_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 BL31_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
#define BL31_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)
#if RESET_TO_BL31
static el_change_info_t bl32_entrypoint_info;
static el_change_info_t bl33_entrypoint_info;
#else
/*******************************************************************************
* Reference to structure which holds the arguments that have been passed to
* BL31 from BL2.
******************************************************************************/
static bl31_params_t *bl2_to_bl31_params;
#endif
/*****************************************************************************
* Return a pointer to the 'el_change_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.
*****************************************************************************/
el_change_info_t *bl31_get_next_image_info(uint32_t type)
{
el_change_info_t *next_image_info;
#if RESET_TO_BL31
if (type == NON_SECURE)
fvp_get_entry_point_info(NON_SECURE, &bl33_entrypoint_info);
else
fvp_get_entry_point_info(SECURE, &bl32_entrypoint_info);
next_image_info = (type == NON_SECURE) ?
&bl33_entrypoint_info :
&bl32_entrypoint_info;
#else
next_image_info = (type == NON_SECURE) ?
bl2_to_bl31_params->bl33_ep :
bl2_to_bl31_params->bl32_ep;
#endif
/* None of the images on this platform can have 0x0 as the entrypoint */
if (next_image_info->pc)
return next_image_info;
else
return NULL;
}
/*******************************************************************************
* Perform any BL31 specific platform actions. 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. On the FVP
* we know that BL2 has populated the parameters in secure DRAM. So we just use
* the reference passed in 'from_bl2' instead of copying. The 'data' parameter
* is not used since all the information is contained in 'from_bl2'. Also, BL2
* has flushed this information to memory, so we are guaranteed to pick up good
* data
******************************************************************************/
void bl31_early_platform_setup(bl31_params_t *from_bl2,
void *plat_params_from_bl2)
{
/* Initialize the platform config for future decision making */
fvp_config_setup();
console_init(PL011_UART0_BASE);
#if RESET_TO_BL31
/*
* Do initial security configuration to allow DRAM/device access. On
* Base FVP only DRAM security is programmable (via TrustZone), but
* other platforms might have more programmable security devices
* present.
*/
fvp_security_setup();
#else
assert(from_bl2->h.type == PARAM_BL31);
assert(from_bl2->h.version >= VERSION_1);
bl2_to_bl31_params = from_bl2;
#endif
}
/*******************************************************************************
* Initialize the gic, configure the CLCD and zero out variables needed by the
* secondaries to boot up correctly.
******************************************************************************/
void bl31_platform_setup()
{
unsigned int reg_val;
/* Initialize the gic cpu and distributor interfaces */
gic_setup();
/*
* TODO: Configure the CLCD before handing control to
* linux. Need to see if a separate driver is needed
* instead.
*/
mmio_write_32(VE_SYSREGS_BASE + V2M_SYS_CFGDATA, 0);
mmio_write_32(VE_SYSREGS_BASE + V2M_SYS_CFGCTRL,
(1ull << 31) | (1 << 30) | (7 << 20) | (0 << 16));
/* Enable and initialize the System level generic timer */
mmio_write_32(SYS_CNTCTL_BASE + CNTCR_OFF, CNTCR_FCREQ(0) | CNTCR_EN);
/* Allow access to the System counter timer module */
reg_val = (1 << CNTACR_RPCT_SHIFT) | (1 << CNTACR_RVCT_SHIFT);
reg_val |= (1 << CNTACR_RFRQ_SHIFT) | (1 << CNTACR_RVOFF_SHIFT);
reg_val |= (1 << CNTACR_RWVT_SHIFT) | (1 << CNTACR_RWPT_SHIFT);
mmio_write_32(SYS_TIMCTL_BASE + CNTACR_BASE(0), reg_val);
mmio_write_32(SYS_TIMCTL_BASE + CNTACR_BASE(1), reg_val);
reg_val = (1 << CNTNSAR_NS_SHIFT(0)) | (1 << CNTNSAR_NS_SHIFT(1));
mmio_write_32(SYS_TIMCTL_BASE + CNTNSAR, reg_val);
/* Intialize the power controller */
fvp_pwrc_setup();
/* Topologies are best known to the platform. */
fvp_setup_topology();
}
/*******************************************************************************
* 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 bl31_plat_arch_setup()
{
#if RESET_TO_BL31
fvp_cci_setup();
#endif
fvp_configure_mmu_el3(BL31_RO_BASE,
(BL31_COHERENT_RAM_LIMIT - BL31_RO_BASE),
BL31_RO_BASE,
BL31_RO_LIMIT,
BL31_COHERENT_RAM_BASE,
BL31_COHERENT_RAM_LIMIT);
}
#if RESET_TO_BL31
/*******************************************************************************
* Generate the entry point info for Non Secure and Secure images
* for transferring control from BL31
******************************************************************************/
void fvp_get_entry_point_info(unsigned long target_security,
el_change_info_t *target_entry_info)
{
if (target_security == NON_SECURE) {
SET_PARAM_HEAD(target_entry_info,
PARAM_EP,
VERSION_1,
0);
/*
* Tell BL31 where the non-trusted software image
* is located and the entry state information
*/
target_entry_info->pc = plat_get_ns_image_entrypoint();
fvp_set_bl33_entrypoint(target_entry_info);
} else {
SET_PARAM_HEAD(target_entry_info,
PARAM_EP,
VERSION_1,
0);
if (BL32_BASE != 0) {
/* Hard coding entry point to the base of the BL32 */
target_entry_info->pc = BL32_BASE;
fvp_set_bl32_entrypoint(target_entry_info);
}
}
}
#endif