/* * Copyright (c) 2015, 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 #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 __BL31_END__; #if USE_COHERENT_MEM extern unsigned long __COHERENT_RAM_START__; extern unsigned long __COHERENT_RAM_END__; #endif extern uint64_t tegra_bl31_phys_base; /* * The next 3 constants identify the extents of the code, RO data region and the * limit of the BL3-1 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 static entry_point_info_t bl33_image_ep_info; static plat_params_from_bl2_t plat_bl31_params_from_bl2 = { (uint64_t)TZDRAM_SIZE, (uintptr_t)NULL }; /******************************************************************************* * This variable holds the non-secure image entry address ******************************************************************************/ extern uint64_t ns_image_entrypoint; /******************************************************************************* * Return a pointer to the 'entry_point_info' structure of the next image for * security state specified. BL33 corresponds to the non-secure image type * while BL32 corresponds to the secure image type. ******************************************************************************/ entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) { if (type == NON_SECURE) return &bl33_image_ep_info; return NULL; } /******************************************************************************* * Return a pointer to the 'plat_params_from_bl2_t' structure. The BL2 image * passes this platform specific information. ******************************************************************************/ plat_params_from_bl2_t *bl31_get_plat_params(void) { return &plat_bl31_params_from_bl2; } /******************************************************************************* * Perform any BL31 specific platform actions. Populate the BL33 and BL32 image * info. ******************************************************************************/ void bl31_early_platform_setup(bl31_params_t *from_bl2, void *plat_params_from_bl2) { plat_params_from_bl2_t *plat_params = (plat_params_from_bl2_t *)plat_params_from_bl2; /* * Configure the UART port to be used as the console */ console_init(TEGRA_BOOT_UART_BASE, TEGRA_BOOT_UART_CLK_IN_HZ, TEGRA_CONSOLE_BAUDRATE); /* Initialise crash console */ plat_crash_console_init(); /* * Copy BL3-3 entry point information. * They are stored in Secure RAM, in BL2's address space. */ bl33_image_ep_info = *from_bl2->bl33_ep_info; /* * Parse platform specific parameters - TZDRAM aperture size and * pointer to BL32 params. */ if (plat_params) { plat_bl31_params_from_bl2.tzdram_size = plat_params->tzdram_size; plat_bl31_params_from_bl2.bl32_params = plat_params->bl32_params; } } /******************************************************************************* * Initialize the gic, configure the SCR. ******************************************************************************/ void bl31_platform_setup(void) { uint32_t tmp_reg; /* * Setup secondary CPU POR infrastructure. */ plat_secondary_setup(); /* * Initial Memory Controller configuration. */ tegra_memctrl_setup(); /* * Do initial security configuration to allow DRAM/device access. */ tegra_memctrl_tzdram_setup(tegra_bl31_phys_base, plat_bl31_params_from_bl2.tzdram_size); /* Set the next EL to be AArch64 */ tmp_reg = SCR_RES1_BITS | SCR_RW_BIT; write_scr(tmp_reg); /* Initialize the gic cpu and distributor interfaces */ tegra_gic_setup(); } /******************************************************************************* * Perform the very early platform specific architectural setup here. At the * moment this only intializes the mmu in a quick and dirty way. ******************************************************************************/ void bl31_plat_arch_setup(void) { unsigned long bl31_base_pa = tegra_bl31_phys_base; unsigned long total_base = bl31_base_pa; unsigned long total_size = TZDRAM_END - BL31_RO_BASE; unsigned long ro_start = bl31_base_pa; unsigned long ro_size = BL31_RO_LIMIT - BL31_RO_BASE; unsigned long coh_start = 0; unsigned long coh_size = 0; const mmap_region_t *plat_mmio_map = NULL; #if USE_COHERENT_MEM coh_start = total_base + (BL31_COHERENT_RAM_BASE - BL31_RO_BASE); coh_size = BL31_COHERENT_RAM_LIMIT - BL31_COHERENT_RAM_BASE; #endif /* add memory regions */ mmap_add_region(total_base, total_base, total_size, MT_MEMORY | MT_RW | MT_SECURE); mmap_add_region(ro_start, ro_start, ro_size, MT_MEMORY | MT_RO | MT_SECURE); #if USE_COHERENT_MEM mmap_add_region(coh_start, coh_start, coh_size, MT_DEVICE | MT_RW | MT_SECURE); #endif /* add MMIO space */ plat_mmio_map = plat_get_mmio_map(); if (plat_mmio_map) mmap_add(plat_mmio_map); else WARN("MMIO map not available\n"); /* set up translation tables */ init_xlat_tables(); /* enable the MMU */ enable_mmu_el3(0); } /******************************************************************************* * Check if the given NS DRAM range is valid ******************************************************************************/ int bl31_check_ns_address(uint64_t base, uint64_t size_in_bytes) { uint64_t end = base + size_in_bytes - 1; /* * Check if the NS DRAM address is valid */ if ((base < TEGRA_DRAM_BASE) || (end > TEGRA_DRAM_END) || (base >= end)) { ERROR("NS address is out-of-bounds!\n"); return -EFAULT; } /* * TZDRAM aperture contains the BL31 and BL32 images, so we need * to check if the NS DRAM range overlaps the TZDRAM aperture. */ if ((base < TZDRAM_END) && (end > tegra_bl31_phys_base)) { ERROR("NS address overlaps TZDRAM!\n"); return -ENOTSUP; } /* valid NS address */ return 0; }