1/*
2 * Copyright (C) 2018 Marvell International Ltd.
3 *
4 * SPDX-License-Identifier:	BSD-3-Clause
5 * https://spdx.org/licenses
6 */
7
8#include <asm_macros.S>
9#include <platform_def.h>
10
11	.globl	plat_secondary_cold_boot_setup
12	.globl	plat_get_my_entrypoint
13	.globl	plat_is_my_cpu_primary
14
15	/* -----------------------------------------------------
16	 * void plat_secondary_cold_boot_setup (void);
17	 *
18	 * This function performs any platform specific actions
19	 * needed for a secondary cpu after a cold reset. Right
20	 * now this is a stub function.
21	 * -----------------------------------------------------
22	 */
23func plat_secondary_cold_boot_setup
24	mov	x0, #0
25	ret
26endfunc plat_secondary_cold_boot_setup
27
28	/* ---------------------------------------------------------------------
29	 * unsigned long plat_get_my_entrypoint (void);
30	 *
31	 * Main job of this routine is to distinguish between cold and warm boot
32	 * For a cold boot, return 0.
33	 * For a warm boot, read the mailbox and return the address it contains.
34	 * A magic number is placed before entrypoint to avoid mistake caused by
35	 * uninitialized mailbox data area.
36	 * ---------------------------------------------------------------------
37	 */
38func plat_get_my_entrypoint
39	/* Read first word and compare it with magic num */
40	mov_imm x0, PLAT_MARVELL_MAILBOX_BASE
41	ldr	x1, [x0]
42	mov_imm x2, PLAT_MARVELL_MAILBOX_MAGIC_NUM
43	cmp	x1, x2
44	/* If compare failed, return 0, i.e. cold boot */
45	beq	entrypoint
46	mov	x0, #0
47	ret
48entrypoint:
49	/* Second word contains the jump address */
50	add	x0, x0, #8
51	ldr	x0, [x0]
52	ret
53endfunc plat_get_my_entrypoint
54
55	/* -----------------------------------------------------
56	 * unsigned int plat_is_my_cpu_primary (void);
57	 *
58	 * Find out whether the current cpu is the primary
59	 * cpu.
60	 * -----------------------------------------------------
61	 */
62func plat_is_my_cpu_primary
63	mrs	x0, mpidr_el1
64	and	x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
65	cmp	x0, #MVEBU_PRIMARY_CPU
66	cset	w0, eq
67	ret
68endfunc plat_is_my_cpu_primary
69