/* * 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 #include #include #include #include #include #include #include #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__; 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__) /* Data structure which holds the extents of the trusted RAM for BL2 */ static meminfo_t bl2_tzram_layout __attribute__ ((aligned(PLATFORM_CACHE_LINE_SIZE), section("tzfw_coherent_mem"))); /******************************************************************************* * 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, BL2_COHERENT_RAM_BASE, BL2_COHERENT_RAM_LIMIT); } /******************************************************************************* * 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_BASE; bl33_meminfo->total_size = DRAM_SIZE; bl33_meminfo->free_base = DRAM_BASE; bl33_meminfo->free_size = DRAM_SIZE; }