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