/* * 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 /******************************************************************************* * 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 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__) /* Pointer to memory visible to both BL2 and BL31 for passing data */ extern unsigned char **bl2_el_change_mem_ptr; /* Data structure which holds the extents of the trusted SRAM for BL2 */ static meminfo_t bl2_tzram_layout __attribute__ ((aligned(PLATFORM_CACHE_LINE_SIZE), section("tzfw_coherent_mem"))); /******************************************************************************* * Reference to structures which holds the arguments which need to be passed * to BL31 ******************************************************************************/ static bl31_params_t *bl2_to_bl31_params; static entry_point_info_t *bl31_ep_info; 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) { bl2_to_bl31_params_mem_t *bl31_params_mem; /* * Ensure that the secure DRAM memory used for passing BL31 arguments * does not overlap with the BL32_BASE. */ assert(BL32_BASE > PARAMS_BASE + sizeof(bl2_to_bl31_params_mem_t)); /* * Allocate the memory for all the arguments that needs to * be passed to BL31 */ bl31_params_mem = (bl2_to_bl31_params_mem_t *)PARAMS_BASE; memset((void *)PARAMS_BASE, 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 BL31 related information */ bl31_ep_info = &bl31_params_mem->bl31_ep_info; 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 BL32 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); } /* Fill BL33 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); 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) { return bl31_ep_info; } /******************************************************************************* * BL1 has passed the extents of the trusted SRAM that should be visible to BL2 * in x0. This memory layout is sitting at the base of the free trusted SRAM. * 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_UART0_BASE); /* Setup the BL2 memory layout */ bl2_tzram_layout.total_base = mem_layout->total_base; bl2_tzram_layout.total_size = mem_layout->total_size; bl2_tzram_layout.free_base = mem_layout->free_base; bl2_tzram_layout.free_size = mem_layout->free_size; bl2_tzram_layout.attr = mem_layout->attr; bl2_tzram_layout.next = 0; /* Initialize the platform config for future decision making */ platform_config_setup(); } /******************************************************************************* * Perform platform specific setup. For now just initialize the memory location * to use for passing arguments to BL31. ******************************************************************************/ void bl2_platform_setup(void) { /* * 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. */ plat_security_setup(); /* Initialise the IO layer and register platform IO devices */ io_setup(); } /* Flush the TF params and the TF plat params */ void bl2_plat_flush_bl31_params(void) { flush_dcache_range((unsigned long)PARAMS_BASE, \ 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() { 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); } /******************************************************************************* * 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 FVP 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 FVP 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) { fvp_set_bl32_ep_info(bl32_ep_info); } /******************************************************************************* * 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 FVP 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) { fvp_set_bl33_ep_info(bl33_ep_info); } /******************************************************************************* * 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. * TODO: We are temporarily executing BL2 from TZDRAM; * will eventually move to Trusted SRAM */ bl32_meminfo->total_base = BL32_BASE; bl32_meminfo->free_base = BL32_BASE; bl32_meminfo->total_size = (TZDRAM_BASE + TZDRAM_SIZE) - BL32_BASE; bl32_meminfo->free_size = (TZDRAM_BASE + TZDRAM_SIZE) - BL32_BASE; bl32_meminfo->attr = BOT_LOAD; bl32_meminfo->next = 0; } /******************************************************************************* * Populate the extents of memory available for loading BL33 ******************************************************************************/ 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; bl33_meminfo->attr = 0; bl33_meminfo->attr = 0; }