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authorAchin Gupta <achin.gupta@arm.com>2013-10-25 09:08:21 +0100
committerJames Morrissey <james.morrissey@arm.com>2013-10-25 09:37:16 +0100
commit4f6ad66ae9fcc8bcb3b0fcee10b7ab1ffcaf1a56 (patch)
tree475db5d74370cb62b02afab0900774955a59702f /bl1/aarch64/bl1_entrypoint.S
downloadtrusted-firmware-a-4f6ad66ae9fcc8bcb3b0fcee10b7ab1ffcaf1a56.tar.gz
ARMv8 Trusted Firmware release v0.2v0.2
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+/*
+ * Copyright (c) 2013, ARM Limited. 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.
+ */
+
+
+ .globl reset_handler
+
+
+ .section reset_code, "ax"; .align 3
+
+ /* -----------------------------------------------------
+ * reset_handler() is the entry point into the trusted
+ * firmware code when a cpu is released from warm or
+ * cold reset.
+ * -----------------------------------------------------
+ */
+
+reset_handler:; .type reset_handler, %function
+ /* ---------------------------------------------
+ * Perform any processor specific actions upon
+ * reset e.g. cache, tlb invalidations etc.
+ * ---------------------------------------------
+ */
+ bl cpu_reset_handler
+
+_wait_for_entrypoint:
+ /* ---------------------------------------------
+ * Find the type of reset and jump to handler
+ * if present. If the handler is null then it is
+ * a cold boot. The primary cpu will set up the
+ * platform while the secondaries wait for
+ * their turn to be woken up
+ * ---------------------------------------------
+ */
+ bl read_mpidr
+ bl platform_get_entrypoint
+ cbnz x0, _do_warm_boot
+ bl read_mpidr
+ bl platform_is_primary_cpu
+ cbnz x0, _do_cold_boot
+
+ /* ---------------------------------------------
+ * Perform any platform specific secondary cpu
+ * actions
+ * ---------------------------------------------
+ */
+ bl plat_secondary_cold_boot_setup
+ b _wait_for_entrypoint
+
+_do_cold_boot:
+ /* ---------------------------------------------
+ * Initialize platform and jump to our c-entry
+ * point for this type of reset
+ * ---------------------------------------------
+ */
+ adr x0, bl1_main
+ bl platform_cold_boot_init
+ b _panic
+
+_do_warm_boot:
+ /* ---------------------------------------------
+ * Jump to BL31 for all warm boot init.
+ * ---------------------------------------------
+ */
+ blr x0
+_panic:
+ b _panic