xref: /linux/arch/microblaze/kernel/cpu/cpuinfo.c (revision 8dd06ef34b6e2f41b29fbf5fc1663780f2524285)
1 /*
2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3  * Copyright (C) 2007-2009 PetaLogix
4  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License. See the file "COPYING" in the main directory of this archive
8  * for more details.
9  */
10 
11 #include <linux/clk.h>
12 #include <linux/init.h>
13 #include <asm/cpuinfo.h>
14 #include <asm/pvr.h>
15 
16 const struct cpu_ver_key cpu_ver_lookup[] = {
17 	/* These key value are as per MBV field in PVR0 */
18 	{"5.00.a", 0x01},
19 	{"5.00.b", 0x02},
20 	{"5.00.c", 0x03},
21 	{"6.00.a", 0x04},
22 	{"6.00.b", 0x06},
23 	{"7.00.a", 0x05},
24 	{"7.00.b", 0x07},
25 	{"7.10.a", 0x08},
26 	{"7.10.b", 0x09},
27 	{"7.10.c", 0x0a},
28 	{"7.10.d", 0x0b},
29 	{"7.20.a", 0x0c},
30 	{"7.20.b", 0x0d},
31 	{"7.20.c", 0x0e},
32 	{"7.20.d", 0x0f},
33 	{"7.30.a", 0x10},
34 	{"7.30.b", 0x11},
35 	{"8.00.a", 0x12},
36 	{"8.00.b", 0x13},
37 	{"8.10.a", 0x14},
38 	{"8.20.a", 0x15},
39 	{"8.20.b", 0x16},
40 	{"8.30.a", 0x17},
41 	{"8.40.a", 0x18},
42 	{"8.40.b", 0x19},
43 	{"8.50.a", 0x1a},
44 	{"8.50.b", 0x1c},
45 	{"8.50.c", 0x1e},
46 	{"9.0", 0x1b},
47 	{"9.1", 0x1d},
48 	{"9.2", 0x1f},
49 	{"9.3", 0x20},
50 	{"9.4", 0x21},
51 	{"9.5", 0x22},
52 	{"9.6", 0x23},
53 	{"10.0", 0x24},
54 	{"11.0", 0x25},
55 	{NULL, 0},
56 };
57 
58 /*
59  * FIXME Not sure if the actual key is defined by Xilinx in the PVR
60  */
61 const struct family_string_key family_string_lookup[] = {
62 	{"virtex2", 0x4},
63 	{"virtex2pro", 0x5},
64 	{"spartan3", 0x6},
65 	{"virtex4", 0x7},
66 	{"virtex5", 0x8},
67 	{"spartan3e", 0x9},
68 	{"spartan3a", 0xa},
69 	{"spartan3an", 0xb},
70 	{"spartan3adsp", 0xc},
71 	{"spartan6", 0xd},
72 	{"virtex6", 0xe},
73 	{"virtex7", 0xf},
74 	/* FIXME There is no key code defined for spartan2 */
75 	{"spartan2", 0xf0},
76 	{"kintex7", 0x10},
77 	{"artix7", 0x11},
78 	{"zynq7000", 0x12},
79 	{"UltraScale Virtex", 0x13},
80 	{"UltraScale Kintex", 0x14},
81 	{"UltraScale+ Zynq", 0x15},
82 	{"UltraScale+ Virtex", 0x16},
83 	{"UltraScale+ Kintex", 0x17},
84 	{"Spartan7", 0x18},
85 	{NULL, 0},
86 };
87 
88 struct cpuinfo cpuinfo;
89 static struct device_node *cpu;
90 
setup_cpuinfo(void)91 void __init setup_cpuinfo(void)
92 {
93 	cpu = of_get_cpu_node(0, NULL);
94 	if (!cpu)
95 		pr_err("You don't have cpu or are missing cpu reg property!!!\n");
96 
97 	pr_info("%s: initialising\n", __func__);
98 
99 	switch (cpu_has_pvr()) {
100 	case 0:
101 		pr_warn("%s: No PVR support. Using static CPU info from FDT\n",
102 			__func__);
103 		set_cpuinfo_static(&cpuinfo, cpu);
104 		break;
105 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
106  * please do not use FULL PVR with MMU */
107 	case 1:
108 		pr_info("%s: Using full CPU PVR support\n",
109 			__func__);
110 		set_cpuinfo_static(&cpuinfo, cpu);
111 		set_cpuinfo_pvr_full(&cpuinfo, cpu);
112 		break;
113 	default:
114 		pr_warn("%s: Unsupported PVR setting\n", __func__);
115 		set_cpuinfo_static(&cpuinfo, cpu);
116 	}
117 
118 	if (cpuinfo.mmu_privins)
119 		pr_warn("%s: Stream instructions enabled"
120 			" - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
121 
122 	of_node_put(cpu);
123 }
124 
setup_cpuinfo_clk(void)125 void __init setup_cpuinfo_clk(void)
126 {
127 	struct clk *clk;
128 
129 	clk = of_clk_get(cpu, 0);
130 	if (IS_ERR(clk)) {
131 		pr_err("ERROR: CPU CCF input clock not found\n");
132 		/* take timebase-frequency from DTS */
133 		cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
134 	} else {
135 		cpuinfo.cpu_clock_freq = clk_get_rate(clk);
136 	}
137 
138 	if (!cpuinfo.cpu_clock_freq) {
139 		pr_err("ERROR: CPU clock frequency not setup\n");
140 		BUG();
141 	}
142 }
143