1/* 2 * Copyright (c) 2013, ARM Limited. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <bl_common.h> 32 33 34 .globl bl2_entrypoint 35 36 37 .section entry_code, "ax"; .align 3 38 39 40bl2_entrypoint:; .type bl2_entrypoint, %function 41 /*--------------------------------------------- 42 * Store the extents of the tzram available to 43 * BL2 for future use. Use the opcode param to 44 * allow implement other functions if needed. 45 * --------------------------------------------- 46 */ 47 mov x20, x0 48 mov x21, x1 49 mov x22, x2 50 51 /* --------------------------------------------- 52 * This is BL2 which is expected to be executed 53 * only by the primary cpu (at least for now). 54 * So, make sure no secondary has lost its way. 55 * --------------------------------------------- 56 */ 57 bl read_mpidr 58 mov x19, x0 59 bl platform_is_primary_cpu 60 cbz x0, _panic 61 62 /* -------------------------------------------- 63 * Give ourselves a small coherent stack to 64 * ease the pain of initializing the MMU 65 * -------------------------------------------- 66 */ 67 mov x0, x19 68 bl platform_set_coherent_stack 69 70 /* --------------------------------------------- 71 * Perform early platform setup & platform 72 * specific early arch. setup e.g. mmu setup 73 * --------------------------------------------- 74 */ 75 mov x0, x21 76 mov x1, x22 77 bl bl2_early_platform_setup 78 bl bl2_plat_arch_setup 79 80 /* --------------------------------------------- 81 * Give ourselves a stack allocated in Normal 82 * -IS-WBWA memory 83 * --------------------------------------------- 84 */ 85 mov x0, x19 86 bl platform_set_stack 87 88 /* --------------------------------------------- 89 * Jump to main function. 90 * --------------------------------------------- 91 */ 92 bl bl2_main 93_panic: 94 b _panic 95