1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * The 'sbi' command displays information about the SBI implementation.
4 *
5 * Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
6 */
7
8#include <common.h>
9#include <command.h>
10#include <asm/sbi.h>
11
12struct sbi_imp {
13	const long id;
14	const char *name;
15};
16
17struct sbi_ext {
18	const u32 id;
19	const char *name;
20};
21
22static struct sbi_imp implementations[] = {
23	{ 0, "Berkeley Boot Loader (BBL)" },
24	{ 1, "OpenSBI" },
25	{ 2, "Xvisor" },
26	{ 3, "KVM" },
27	{ 4, "RustSBI" },
28	{ 5, "Diosix" },
29	{ 6, "Coffer" },
30	{ 7, "Xen Project" },
31	{ 8, "PolarFire Hart Software Services" },
32	{ 9, "coreboot" },
33	{ 10, "oreboot" },
34};
35
36static struct sbi_ext extensions[] = {
37	{ SBI_EXT_0_1_SET_TIMER,	      "Set Timer" },
38	{ SBI_EXT_0_1_CONSOLE_PUTCHAR,	      "Console Putchar" },
39	{ SBI_EXT_0_1_CONSOLE_GETCHAR,	      "Console Getchar" },
40	{ SBI_EXT_0_1_CLEAR_IPI,	      "Clear IPI" },
41	{ SBI_EXT_0_1_SEND_IPI,		      "Send IPI" },
42	{ SBI_EXT_0_1_REMOTE_FENCE_I,	      "Remote FENCE.I" },
43	{ SBI_EXT_0_1_REMOTE_SFENCE_VMA,      "Remote SFENCE.VMA" },
44	{ SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, "Remote SFENCE.VMA with ASID" },
45	{ SBI_EXT_0_1_SHUTDOWN,		      "System Shutdown" },
46	{ SBI_EXT_BASE,			      "SBI Base Functionality" },
47	{ SBI_EXT_TIME,			      "Timer Extension" },
48	{ SBI_EXT_IPI,			      "IPI Extension" },
49	{ SBI_EXT_RFENCE,		      "RFENCE Extension" },
50	{ SBI_EXT_HSM,			      "Hart State Management Extension" },
51	{ SBI_EXT_SRST,			      "System Reset Extension" },
52	{ SBI_EXT_PMU,			      "Performance Monitoring Unit Extension" },
53	{ SBI_EXT_DBCN,			      "Debug Console Extension" },
54	{ SBI_EXT_SUSP,			      "System Suspend Extension" },
55	{ SBI_EXT_CPPC,			      "Collaborative Processor Performance Control Extension" },
56	{ SBI_EXT_NACL,			      "Nested Acceleration Extension" },
57	{ SBI_EXT_STA,			      "Steal-time Accounting Extension" },
58	{ SBI_EXT_DBTR,			      "Debug Trigger Extension" },
59	{ SBI_EXT_SSE,			      "Supervisor Software Events" },
60};
61
62static int do_sbi(struct cmd_tbl *cmdtp, int flag, int argc,
63		  char *const argv[])
64{
65	int i, impl_id;
66	long ret;
67	long mvendorid, marchid, mimpid;
68
69	ret = sbi_get_spec_version();
70	if (ret < 0) {
71		printf("No SBI 0.2+\n");
72		return CMD_RET_FAILURE;
73	}
74	printf("SBI %ld.%ld", ret >> 24, ret & 0xffffff);
75	impl_id = sbi_get_impl_id();
76	if (impl_id >= 0) {
77		for (i = 0; i < ARRAY_SIZE(implementations); ++i) {
78			if (impl_id == implementations[i].id) {
79				long vers;
80
81				printf("\n%s ", implementations[i].name);
82				ret = sbi_get_impl_version(&vers);
83				if (ret < 0)
84					break;
85				switch (impl_id) {
86				case 1: /* OpenSBI */
87				case 8: /* PolarFire Hart Software Services */
88					printf("%ld.%ld",
89					       vers >> 16, vers & 0xffff);
90					break;
91				case 3: /* KVM */
92				case 4: /* RustSBI */
93					printf("%ld.%ld.%ld",
94					       vers >> 16,
95					       (vers >> 8) & 0xff,
96					       vers & 0xff);
97					break;
98				default:
99					printf("0x%lx", vers);
100					break;
101				}
102				break;
103			}
104		}
105		if (i == ARRAY_SIZE(implementations))
106			printf("\nUnknown implementation ID 0x%x", impl_id);
107	}
108	printf("\nMachine:\n");
109	ret = sbi_get_mvendorid(&mvendorid);
110	if (!ret)
111		printf("  Vendor ID %lx\n", mvendorid);
112	ret = sbi_get_marchid(&marchid);
113	if (!ret)
114		printf("  Architecture ID %lx\n", marchid);
115	ret = sbi_get_mimpid(&mimpid);
116	if (!ret)
117		printf("  Implementation ID %lx\n", mimpid);
118	printf("Extensions:\n");
119	for (i = 0; i < ARRAY_SIZE(extensions); ++i) {
120		ret = sbi_probe_extension(extensions[i].id);
121		if (ret > 0)
122			printf("  %s\n", extensions[i].name);
123	}
124	return 0;
125}
126
127U_BOOT_LONGHELP(sbi,
128	"- display SBI spec version, implementation, and available extensions");
129
130U_BOOT_CMD_COMPLETE(
131	sbi, 1, 0, do_sbi,
132	"display SBI information",
133	sbi_help_text, NULL
134);
135