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authorFerass El Hafidi <vitali64pmemail@protonmail.com>2023-05-08 19:03:10 +0200
committerFerass El Hafidi <vitali64pmemail@protonmail.com>2023-05-08 19:03:10 +0200
commitf9ed707f171c8069e99e24e24c3da73d8b6f5716 (patch)
tree4da9838d387c8bc260e83f3f51f5dfa83e0b48ae /bl2/aarch64/bl2_entrypoint.S
downloadamlogic-bl2-master.tar.gz
Push old Amlogic BL2 sourcesHEADmaster
Diffstat (limited to 'bl2/aarch64/bl2_entrypoint.S')
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diff --git a/bl2/aarch64/bl2_entrypoint.S b/bl2/aarch64/bl2_entrypoint.S
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+/*
+ * 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 <arch.h>
+#include <asm_macros.S>
+#include <bl_common.h>
+#include <platform_def.h>
+
+ .globl bl2_entrypoint
+
+func bl2_entrypoint
+ /*---------------------------------------------
+ * Store the extents of the tzram available to
+ * BL2 for future use. Use the opcode param to
+ * allow implement other functions if needed.
+ * ---------------------------------------------
+ */
+ mov x20, x0
+ mov x21, x1
+
+ /* ---------------------------------------------
+ * This is BL2 which is expected to be executed
+ * only by the primary cpu (at least for now).
+ * So, make sure no secondary has lost its way.
+ * ---------------------------------------------
+ */
+ mrs x0, mpidr_el1
+ bl platform_is_primary_cpu
+ cbz x0, _panic
+
+ /* ---------------------------------------------
+ * Set the exception vector to something sane.
+ * ---------------------------------------------
+ */
+ adr x0, early_exceptions
+ msr vbar_el1, x0
+
+ /* ---------------------------------------------
+ * Enable the instruction cache.
+ * ---------------------------------------------
+ */
+ mrs x0, sctlr_el1
+ orr x0, x0, #SCTLR_I_BIT
+ msr sctlr_el1, x0
+ isb
+
+ /* ---------------------------------------------
+ * Check the opcodes out of paranoia.
+ * ---------------------------------------------
+ */
+ // mov x0, #RUN_IMAGE
+ // cmp x0, x20
+ // b.ne _panic
+
+
+
+ /* ---------------------------------------------
+ * Zero out NOBITS sections. There are 2 of them:
+ * - the .bss section;
+ * - the coherent memory section.
+ * ---------------------------------------------
+ */
+ ldr x0, =__BSS_START__
+ ldr x1, =__BSS_SIZE__
+ bl zeromem16
+
+ ldr x0, =__COHERENT_RAM_START__
+ ldr x1, =__COHERENT_RAM_UNALIGNED_SIZE__
+ bl zeromem16
+
+ /* --------------------------------------------
+ * Give ourselves a small coherent stack to
+ * ease the pain of initializing the MMU
+ * --------------------------------------------
+ */
+ mrs x0, mpidr_el1
+ bl platform_set_coherent_stack
+
+ /* ---------------------------------------------
+ * Perform early platform setup & platform
+ * specific early arch. setup e.g. mmu setup
+ * ---------------------------------------------
+ */
+ mov x0, x21
+ bl bl2_early_platform_setup
+ bl bl2_plat_arch_setup
+
+ /* ---------------------------------------------
+ * Give ourselves a stack allocated in Normal
+ * -IS-WBWA memory
+ * ---------------------------------------------
+ */
+ mrs x0, mpidr_el1
+ bl platform_set_stack
+
+ /* ---------------------------------------------
+ * Jump to main function.
+ * ---------------------------------------------
+ */
+ bl bl2_main
+_panic:
+ b _panic