2017-11-06 14:49:04 +00:00
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/*
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2018-03-27 09:39:47 +01:00
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* Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
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2017-11-06 14:49:04 +00:00
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <bl_common.h>
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#include <platform.h>
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#include <platform_def.h>
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#include <xlat_mmu_helpers.h>
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#include <xlat_tables_defs.h>
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#include "rpi3_private.h"
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#define BL31_END (uintptr_t)(&__BL31_END__)
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/*
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* Placeholder variables for copying the arguments that have been passed to
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* BL31 from BL2.
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*/
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static entry_point_info_t bl32_image_ep_info;
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static entry_point_info_t bl33_image_ep_info;
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/*******************************************************************************
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* Return a pointer to the 'entry_point_info' structure of the next image for
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* the security state specified. BL33 corresponds to the non-secure image type
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* while BL32 corresponds to the secure image type. A NULL pointer is returned
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* if the image does not exist.
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******************************************************************************/
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entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
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{
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entry_point_info_t *next_image_info;
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assert(sec_state_is_valid(type) != 0);
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next_image_info = (type == NON_SECURE)
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? &bl33_image_ep_info : &bl32_image_ep_info;
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/* None of the images can have 0x0 as the entrypoint. */
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if (next_image_info->pc) {
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return next_image_info;
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} else {
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return NULL;
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}
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}
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/*******************************************************************************
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* Perform any BL31 early platform setup. Here is an opportunity to copy
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* parameters passed by the calling EL (S-EL1 in BL2 & S-EL3 in BL1) before
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* they are lost (potentially). This needs to be done before the MMU is
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* initialized so that the memory layout can be used while creating page
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* tables. BL2 has flushed this information to memory, so we are guaranteed
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* to pick up good data.
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******************************************************************************/
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2018-08-17 14:25:08 +01:00
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void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
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u_register_t arg2, u_register_t arg3)
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2017-11-06 14:49:04 +00:00
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{
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/* Initialize the console to provide early debug support */
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2018-03-27 09:39:47 +01:00
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rpi3_console_init();
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2017-11-06 14:49:04 +00:00
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/*
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2018-08-17 14:25:08 +01:00
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* In debug builds, a special value is passed in 'arg1' to verify
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* platform parameters from BL2 to BL31. Not used in release builds.
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2017-11-06 14:49:04 +00:00
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*/
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2018-08-17 14:25:08 +01:00
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assert(arg1 == RPI3_BL31_PLAT_PARAM_VAL);
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2017-11-06 14:49:04 +00:00
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2018-08-17 14:25:08 +01:00
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/* Check that params passed from BL2 are not NULL. */
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bl_params_t *params_from_bl2 = (bl_params_t *) arg0;
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2017-11-06 14:49:04 +00:00
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assert(params_from_bl2 != NULL);
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assert(params_from_bl2->h.type == PARAM_BL_PARAMS);
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assert(params_from_bl2->h.version >= VERSION_2);
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bl_params_node_t *bl_params = params_from_bl2->head;
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/*
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* Copy BL33 and BL32 (if present), entry point information.
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* They are stored in Secure RAM, in BL2's address space.
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*/
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while (bl_params) {
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if (bl_params->image_id == BL32_IMAGE_ID) {
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bl32_image_ep_info = *bl_params->ep_info;
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}
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if (bl_params->image_id == BL33_IMAGE_ID) {
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bl33_image_ep_info = *bl_params->ep_info;
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}
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bl_params = bl_params->next_params_info;
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}
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if (bl33_image_ep_info.pc == 0) {
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panic();
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}
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2018-07-15 12:32:32 +01:00
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#if RPI3_DIRECT_LINUX_BOOT
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# if RPI3_BL33_IN_AARCH32
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/*
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* According to the file ``Documentation/arm/Booting`` of the Linux
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* kernel tree, Linux expects:
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* r0 = 0
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* r1 = machine type number, optional in DT-only platforms (~0 if so)
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* r2 = Physical address of the device tree blob
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*/
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VERBOSE("rpi3: Preparing to boot 32-bit Linux kernel\n");
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bl33_image_ep_info.args.arg0 = 0U;
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bl33_image_ep_info.args.arg1 = ~0U;
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bl33_image_ep_info.args.arg2 = (u_register_t) RPI3_PRELOADED_DTB_BASE;
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# else
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/*
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* According to the file ``Documentation/arm64/booting.txt`` of the
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* Linux kernel tree, Linux expects the physical address of the device
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* tree blob (DTB) in x0, while x1-x3 are reserved for future use and
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* must be 0.
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*/
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VERBOSE("rpi3: Preparing to boot 64-bit Linux kernel\n");
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bl33_image_ep_info.args.arg0 = (u_register_t) RPI3_PRELOADED_DTB_BASE;
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bl33_image_ep_info.args.arg1 = 0ULL;
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bl33_image_ep_info.args.arg2 = 0ULL;
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bl33_image_ep_info.args.arg3 = 0ULL;
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# endif /* RPI3_BL33_IN_AARCH32 */
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#endif /* RPI3_DIRECT_LINUX_BOOT */
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2017-11-06 14:49:04 +00:00
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}
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void bl31_plat_arch_setup(void)
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{
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rpi3_setup_page_tables(BL31_BASE, BL31_END - BL31_BASE,
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BL_CODE_BASE, BL_CODE_END,
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BL_RO_DATA_BASE, BL_RO_DATA_END
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#if USE_COHERENT_MEM
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, BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END
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#endif
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);
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enable_mmu_el3(0);
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}
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void bl31_platform_setup(void)
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{
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/*
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* Do initial security configuration to allow DRAM/device access
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* (if earlier BL has not already done so).
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*/
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return;
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}
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