Skip to content

GitLab

Switch branch/tag
Find file Normal viewHistoryPermalink
imx8_helpers.S 3.11 KB
Newer Older
Anson Huang's avatar
Support for NXP's imx SoC common function    
Anson Huang committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 
/*
 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <asm_macros.S>
#include <platform_def.h>
#include <cortex_a35.h>

	.globl	plat_is_my_cpu_primary
	.globl	plat_my_core_pos
	.globl	plat_calc_core_pos
	.globl	plat_reset_handler
	.globl	plat_get_my_entrypoint
	.globl	plat_secondary_cold_boot_setup
	.globl	plat_crash_console_init
	.globl	plat_crash_console_putc
Antonio Nino Diaz's avatar
Add plat_crash_console_flush to platforms without it    
Antonio Nino Diaz committed
19 
	.globl	plat_crash_console_flush
Anson Huang's avatar
Support for NXP's imx SoC common function    
Anson Huang committed
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109 
	.globl	platform_mem_init
	.globl  imx_mailbox_init

	/* --------------------------------------------------------------------
	 * Helper macro that reads the part number of the current CPU and jumps
	 * to the given label if it matches the CPU MIDR provided.
	 *
	 * Clobbers x0.
	 * --------------------------------------------------------------------
	 */
	.macro  jump_if_cpu_midr _cpu_midr, _label

	mrs	x0, midr_el1
	ubfx	x0, x0, MIDR_PN_SHIFT, #12
	cmp     w0, #((\_cpu_midr >> MIDR_PN_SHIFT) & MIDR_PN_MASK)
	b.eq	\_label

	.endm

	/* ----------------------------------------------
	 * The mailbox_base is used to distinguish warm/cold
	 * reset. The mailbox_base is in the data section, not
	 * in .bss, this allows function to start using this
	 * variable before the runtime memory is initialized.
	 * ----------------------------------------------
	 */
	.section .data.mailbox_base
	.align 3
	mailbox_base: .quad 0x0

	/* ----------------------------------------------
	 * unsigned int plat_is_my_cpu_primary(void);
	 * This function checks if this is the primary CPU
	 * ----------------------------------------------
	 */
func plat_is_my_cpu_primary
	mrs	x0, mpidr_el1
	and	x0, x0, #(MPIDR_CPU_MASK)
	cmp	x0, #PLAT_PRIMARY_CPU
	cset	x0, eq
	ret
endfunc plat_is_my_cpu_primary

	/* ----------------------------------------------
	 * unsigned int plat_my_core_pos(void)
	 * This Function uses the plat_calc_core_pos()
	 * to get the index of the calling CPU.
	 * ----------------------------------------------
	 */
func plat_my_core_pos
	mrs	x0, mpidr_el1
	and	x1, x0, #MPIDR_CPU_MASK
	and 	x0, x0, #MPIDR_CLUSTER_MASK
	add	x0, x1, x0, LSR #6
	ret
endfunc plat_my_core_pos

	/*
	 * unsigned int plat_calc_core_pos(uint64_t mpidr)
	 * helper function to calculate the core position.
	 * With this function.
	 */
func plat_calc_core_pos
	and	x1, x0, #MPIDR_CPU_MASK
	and 	x0, x0, #MPIDR_CLUSTER_MASK
	add	x0, x1, x0, LSR #6
	ret
endfunc plat_calc_core_pos

	/* ---------------------------------------------
	 * function to get the entrypoint.
	 * ---------------------------------------------
	 */
func plat_get_my_entrypoint
	adrp	x1, mailbox_base
	ldr	x0, [x1, :lo12:mailbox_base]
	ret
endfunc	plat_get_my_entrypoint

func imx_mailbox_init
	adrp	x1, mailbox_base
	str	x0, [x1, :lo12:mailbox_base]
	ret
endfunc imx_mailbox_init

func plat_secondary_cold_boot_setup
	b	.
endfunc plat_secondary_cold_boot_setup

func plat_crash_console_init
Antonio Nino Diaz's avatar
Add plat_crash_console_flush to platforms without it    
Antonio Nino Diaz committed
110 
	mov	x0, #1
Anson Huang's avatar
Support for NXP's imx SoC common function    
Anson Huang committed
111
112
113
114
115
116
117 
	ret
endfunc plat_crash_console_init

func plat_crash_console_putc
	ret
endfunc plat_crash_console_putc
Antonio Nino Diaz's avatar
Add plat_crash_console_flush to platforms without it    
Antonio Nino Diaz committed
118
119
120
121
122 
func plat_crash_console_flush
	mov	x0, #0
	ret
endfunc plat_crash_console_flush
Anson Huang's avatar
Support for NXP's imx SoC common function    
Anson Huang committed
123
124
125 
func platform_mem_init
	ret
endfunc platform_mem_init