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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 /plat/gxb/aarch64/bl1_plat_helpers.S
downloadamlogic-bl2-master.tar.gz
Push old Amlogic BL2 sourcesHEADmaster
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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 "../plat_def.h"
+
+ .globl platform_get_entrypoint
+ .globl platform_cold_boot_init
+ .globl plat_secondary_cold_boot_setup
+
+
+ /* -----------------------------------------------------
+ * void plat_secondary_cold_boot_setup (void);
+ *
+ * This function performs any platform specific actions
+ * needed for a secondary cpu after a cold reset e.g
+ * mark the cpu's presence, mechanism to place it in a
+ * holding pen etc.
+ * -----------------------------------------------------
+ */
+func plat_secondary_cold_boot_setup
+ /* PLAT todo: Implement secondary CPU cold boot setup on PLAT */
+cb_panic:
+ b cb_panic
+
+
+ /* -----------------------------------------------------
+ * void platform_get_entrypoint (unsigned int mpid);
+ *
+ * Main job of this routine is to distinguish between
+ * a cold and warm boot.
+ * On a cold boot the secondaries first wait for the
+ * platform to be initialized after which they are
+ * hotplugged in. The primary proceeds to perform the
+ * platform initialization.
+ * On a warm boot, each cpu jumps to the address in its
+ * mailbox.
+ *
+ * TODO: Not a good idea to save lr in a temp reg
+ * -----------------------------------------------------
+ */
+func platform_get_entrypoint
+ mov x9, x30 // lr
+ bl platform_get_core_pos
+ ldr x1, =TRUSTED_MAILBOXES_BASE
+ lsl x0, x0, #TRUSTED_MAILBOX_SHIFT
+ ldr x0, [x1, x0]
+ ret x9
+
+
+ /* -----------------------------------------------------
+ * void platform_cold_boot_init (bl1_main function);
+ *
+ * Routine called only by the primary cpu after a cold
+ * boot to perform early platform initialization
+ * -----------------------------------------------------
+ */
+func platform_cold_boot_init
+ mov x20, x0
+
+ /* ---------------------------------------------
+ * Give ourselves a small coherent stack to
+ * ease the pain of initializing the MMU and
+ * CCI in assembler
+ * ---------------------------------------------
+ */
+ mrs x0, mpidr_el1
+ bl platform_set_coherent_stack
+
+ /* ---------------------------------------------
+ * Architectural init. can be generic e.g.
+ * enabling stack alignment and platform spec-
+ * ific e.g. MMU & page table setup as per the
+ * platform memory map. Perform the latter here
+ * and the former in bl1_main.
+ * ---------------------------------------------
+ */
+ bl bl1_early_platform_setup
+ bl bl1_plat_arch_setup
+
+ /* ---------------------------------------------
+ * Give ourselves a stack allocated in Normal
+ * -IS-WBWA memory
+ * ---------------------------------------------
+ */
+ mrs x0, mpidr_el1
+ bl platform_set_stack
+
+ /* ---------------------------------------------
+ * Jump to the main function. Returning from it
+ * is a terminal error.
+ * ---------------------------------------------
+ */
+ blr x20
+
+cb_init_panic:
+ b cb_init_panic