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-rw-r--r--bl2/aarch64/bl2_el3_entrypoint.S72
1 files changed, 72 insertions, 0 deletions
diff --git a/bl2/aarch64/bl2_el3_entrypoint.S b/bl2/aarch64/bl2_el3_entrypoint.S
new file mode 100644
index 0000000..45bac7d
--- /dev/null
+++ b/bl2/aarch64/bl2_el3_entrypoint.S
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2017-2021, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/bl_common.h>
+#include <el3_common_macros.S>
+
+ .globl bl2_entrypoint
+
+#if BL2_IN_XIP_MEM
+#define FIXUP_SIZE 0
+#else
+#define FIXUP_SIZE ((BL2_LIMIT) - (BL2_BASE))
+#endif
+
+func bl2_entrypoint
+ /* Save arguments x0-x3 from previous Boot loader */
+ mov x20, x0
+ mov x21, x1
+ mov x22, x2
+ mov x23, x3
+
+ el3_entrypoint_common \
+ _init_sctlr=1 \
+ _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
+ _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
+ _init_memory=1 \
+ _init_c_runtime=1 \
+ _exception_vectors=bl2_el3_exceptions \
+ _pie_fixup_size=FIXUP_SIZE
+
+ /* ---------------------------------------------
+ * Restore parameters of boot rom
+ * ---------------------------------------------
+ */
+ mov x0, x20
+ mov x1, x21
+ mov x2, x22
+ mov x3, x23
+
+ /* ---------------------------------------------
+ * Perform BL2 setup
+ * ---------------------------------------------
+ */
+ bl bl2_el3_setup
+
+#if ENABLE_PAUTH
+ /* ---------------------------------------------
+ * Program APIAKey_EL1 and enable pointer authentication.
+ * ---------------------------------------------
+ */
+ bl pauth_init_enable_el3
+#endif /* ENABLE_PAUTH */
+
+ /* ---------------------------------------------
+ * Jump to main function.
+ * ---------------------------------------------
+ */
+ bl bl2_main
+
+ /* ---------------------------------------------
+ * Should never reach this point.
+ * ---------------------------------------------
+ */
+ no_ret plat_panic_handler
+endfunc bl2_entrypoint