xref: /openbmc/u-boot/arch/arm/mach-zynqmp/handoff.c (revision d01806a8)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2016 - 2017 Xilinx, Inc.
4  *
5  * Michal Simek <michal.simek@xilinx.com>
6  */
7 
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/arch/hardware.h>
11 #include <asm/arch/sys_proto.h>
12 
13 /*
14  * atfhandoffparams
15  * Parameter	bitfield	encoding
16  * -----------------------------------------------------------------------------
17  * Exec State	0	0 -> Aarch64, 1-> Aarch32
18  * endianness	1	0 -> LE, 1 -> BE
19  * secure (TZ)	2	0 -> Non secure, 1 -> secure
20  * EL		3:4	00 -> EL0, 01 -> EL1, 10 -> EL2, 11 -> EL3
21  * CPU#		5:6	00 -> A53_0, 01 -> A53_1, 10 -> A53_2, 11 -> A53_3
22  */
23 
24 #define FSBL_FLAGS_ESTATE_SHIFT		0
25 #define FSBL_FLAGS_ESTATE_MASK		(1 << FSBL_FLAGS_ESTATE_SHIFT)
26 #define FSBL_FLAGS_ESTATE_A64		0
27 #define FSBL_FLAGS_ESTATE_A32		1
28 
29 #define FSBL_FLAGS_ENDIAN_SHIFT		1
30 #define FSBL_FLAGS_ENDIAN_MASK		(1 << FSBL_FLAGS_ENDIAN_SHIFT)
31 #define FSBL_FLAGS_ENDIAN_LE		0
32 #define FSBL_FLAGS_ENDIAN_BE		1
33 
34 #define FSBL_FLAGS_TZ_SHIFT		2
35 #define FSBL_FLAGS_TZ_MASK		(1 << FSBL_FLAGS_TZ_SHIFT)
36 #define FSBL_FLAGS_NON_SECURE		0
37 #define FSBL_FLAGS_SECURE		1
38 
39 #define FSBL_FLAGS_EL_SHIFT		3
40 #define FSBL_FLAGS_EL_MASK		(3 << FSBL_FLAGS_EL_SHIFT)
41 #define FSBL_FLAGS_EL0			0
42 #define FSBL_FLAGS_EL1			1
43 #define FSBL_FLAGS_EL2			2
44 #define FSBL_FLAGS_EL3			3
45 
46 #define FSBL_FLAGS_CPU_SHIFT		5
47 #define FSBL_FLAGS_CPU_MASK		(3 << FSBL_FLAGS_CPU_SHIFT)
48 #define FSBL_FLAGS_A53_0		0
49 #define FSBL_FLAGS_A53_1		1
50 #define FSBL_FLAGS_A53_2		2
51 #define FSBL_FLAGS_A53_3		3
52 
53 #define FSBL_MAX_PARTITIONS		8
54 
55 /* Structure corresponding to each partition entry */
56 struct xfsbl_partition {
57 	uint64_t entry_point;
58 	uint64_t flags;
59 };
60 
61 /* Structure for handoff parameters to ARM Trusted Firmware (ATF) */
62 struct xfsbl_atf_handoff_params {
63 	uint8_t magic[4];
64 	uint32_t num_entries;
65 	struct xfsbl_partition partition[FSBL_MAX_PARTITIONS];
66 };
67 
68 #ifdef CONFIG_SPL_OS_BOOT
handoff_setup(void)69 void handoff_setup(void)
70 {
71 	struct xfsbl_atf_handoff_params *atfhandoffparams;
72 
73 	atfhandoffparams = (void *)CONFIG_SPL_TEXT_BASE;
74 	atfhandoffparams->magic[0] = 'X';
75 	atfhandoffparams->magic[1] = 'L';
76 	atfhandoffparams->magic[2] = 'N';
77 	atfhandoffparams->magic[3] = 'X';
78 
79 	atfhandoffparams->num_entries = 1;
80 	atfhandoffparams->partition[0].entry_point = CONFIG_SYS_TEXT_BASE;
81 	atfhandoffparams->partition[0].flags = FSBL_FLAGS_EL2 <<
82 					       FSBL_FLAGS_EL_SHIFT;
83 
84 	writel(CONFIG_SPL_TEXT_BASE, &pmu_base->gen_storage6);
85 }
86 #endif
87