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 {NULL, 0}, 53 }; 54 55 /* 56 * FIXME Not sure if the actual key is defined by Xilinx in the PVR 57 */ 58 const struct family_string_key family_string_lookup[] = { 59 {"virtex2", 0x4}, 60 {"virtex2pro", 0x5}, 61 {"spartan3", 0x6}, 62 {"virtex4", 0x7}, 63 {"virtex5", 0x8}, 64 {"spartan3e", 0x9}, 65 {"spartan3a", 0xa}, 66 {"spartan3an", 0xb}, 67 {"spartan3adsp", 0xc}, 68 {"spartan6", 0xd}, 69 {"virtex6", 0xe}, 70 {"virtex7", 0xf}, 71 /* FIXME There is no key code defined for spartan2 */ 72 {"spartan2", 0xf0}, 73 {"kintex7", 0x10}, 74 {"artix7", 0x11}, 75 {"zynq7000", 0x12}, 76 {"UltraScale Virtex", 0x13}, 77 {"UltraScale Kintex", 0x14}, 78 {NULL, 0}, 79 }; 80 81 struct cpuinfo cpuinfo; 82 static struct device_node *cpu; 83 84 void __init setup_cpuinfo(void) 85 { 86 cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu"); 87 if (!cpu) 88 pr_err("You don't have cpu!!!\n"); 89 90 pr_info("%s: initialising\n", __func__); 91 92 switch (cpu_has_pvr()) { 93 case 0: 94 pr_warn("%s: No PVR support. Using static CPU info from FDT\n", 95 __func__); 96 set_cpuinfo_static(&cpuinfo, cpu); 97 break; 98 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a 99 * please do not use FULL PVR with MMU */ 100 case 1: 101 pr_info("%s: Using full CPU PVR support\n", 102 __func__); 103 set_cpuinfo_static(&cpuinfo, cpu); 104 set_cpuinfo_pvr_full(&cpuinfo, cpu); 105 break; 106 default: 107 pr_warn("%s: Unsupported PVR setting\n", __func__); 108 set_cpuinfo_static(&cpuinfo, cpu); 109 } 110 111 if (cpuinfo.mmu_privins) 112 pr_warn("%s: Stream instructions enabled" 113 " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__); 114 } 115 116 void __init setup_cpuinfo_clk(void) 117 { 118 struct clk *clk; 119 120 clk = of_clk_get(cpu, 0); 121 if (IS_ERR(clk)) { 122 pr_err("ERROR: CPU CCF input clock not found\n"); 123 /* take timebase-frequency from DTS */ 124 cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency"); 125 } else { 126 cpuinfo.cpu_clock_freq = clk_get_rate(clk); 127 } 128 129 if (!cpuinfo.cpu_clock_freq) { 130 pr_err("ERROR: CPU clock frequency not setup\n"); 131 BUG(); 132 } 133 } 134