1 files changed, 130 insertions, 0 deletions
diff --git a/bl2/aarch32/bl2_entrypoint.S b/bl2/aarch32/bl2_entrypoint.S
new file mode 100644
index 00000000..e6fa5b98
--- /dev/null
+++ b/bl2/aarch32/bl2_entrypoint.S
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <bl_common.h>
+
+
+	.globl	bl2_vector_table
+	.globl	bl2_entrypoint
+
+
+vector_base bl2_vector_table
+	b	bl2_entrypoint
+	b	report_exception	/* Undef */
+	b	report_exception	/* SVC call */
+	b	report_exception	/* Prefetch abort */
+	b	report_exception	/* Data abort */
+	b	report_exception	/* Reserved */
+	b	report_exception	/* IRQ */
+	b	report_exception	/* FIQ */
+
+
+func bl2_entrypoint
+	/*---------------------------------------------
+	 * Save from r1 the extents of the trusted ram
+	 * available to BL2 for future use.
+	 * r0 is not currently used.
+	 * ---------------------------------------------
+	 */
+ 	mov	r11, r1
+
+	/* ---------------------------------------------
+	 * Set the exception vector to something sane.
+	 * ---------------------------------------------
+	 */
+	ldr	r0, =bl2_vector_table
+	stcopr	r0, VBAR
+	isb
+
+	/* -----------------------------------------------------
+	 * Enable the instruction cache
+	 * -----------------------------------------------------
+	 */
+	ldcopr	r0, SCTLR
+	orr	r0, r0, #SCTLR_I_BIT
+	stcopr	r0, SCTLR
+	isb
+
+	/* ---------------------------------------------
+	 * Since BL2 executes after BL1, it is assumed
+	 * here that BL1 has already has done the
+	 * necessary register initializations.
+	 * ---------------------------------------------
+	 */
+
+	/* ---------------------------------------------
+	 * Invalidate the RW memory used by the BL2
+	 * image. This includes the data and NOBITS
+	 * sections. This is done to safeguard against
+	 * possible corruption of this memory by dirty
+	 * cache lines in a system cache as a result of
+	 * use by an earlier boot loader stage.
+	 * ---------------------------------------------
+	 */
+	ldr	r0, =__RW_START__
+	ldr	r1, =__RW_END__
+	sub	r1, r1, r0
+	bl	inv_dcache_range
+
+	/* ---------------------------------------------
+	 * Zero out NOBITS sections. There are 2 of them:
+	 *   - the .bss section;
+	 *   - the coherent memory section.
+	 * ---------------------------------------------
+	 */
+	ldr	r0, =__BSS_START__
+	ldr	r1, =__BSS_SIZE__
+	bl	zeromem
+
+#if USE_COHERENT_MEM
+	ldr	r0, =__COHERENT_RAM_START__
+	ldr	r1, =__COHERENT_RAM_UNALIGNED_SIZE__
+	bl	zeromem
+#endif
+
+	/* --------------------------------------------
+	 * Allocate a stack whose memory will be marked
+	 * as Normal-IS-WBWA when the MMU is enabled.
+	 * There is no risk of reading stale stack
+	 * memory after enabling the MMU as only the
+	 * primary cpu is running at the moment.
+	 * --------------------------------------------
+	 */
+	bl	plat_set_my_stack
+
+	/* ---------------------------------------------
+	 * Initialize the stack protector canary before
+	 * any C code is called.
+	 * ---------------------------------------------
+	 */
+#if STACK_PROTECTOR_ENABLED
+	bl	update_stack_protector_canary
+#endif
+
+	/* ---------------------------------------------
+	 * Perform early platform setup & platform
+	 * specific early arch. setup e.g. mmu setup
+	 * ---------------------------------------------
+	 */
+	mov	r0, r11
+	bl	bl2_early_platform_setup
+	bl	bl2_plat_arch_setup
+
+	/* ---------------------------------------------
+	 * Jump to main function.
+	 * ---------------------------------------------
+	 */
+	bl	bl2_main
+
+	/* ---------------------------------------------
+	 * Should never reach this point.
+	 * ---------------------------------------------
+	 */
+	no_ret	plat_panic_handler
+
+endfunc bl2_entrypoint