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 {"9.0", 0x1b}, 45 {"9.1", 0x1d}, 46 {NULL, 0}, 47 }; 48 49 /* 50 * FIXME Not sure if the actual key is defined by Xilinx in the PVR 51 */ 52 const struct family_string_key family_string_lookup[] = { 53 {"virtex2", 0x4}, 54 {"virtex2pro", 0x5}, 55 {"spartan3", 0x6}, 56 {"virtex4", 0x7}, 57 {"virtex5", 0x8}, 58 {"spartan3e", 0x9}, 59 {"spartan3a", 0xa}, 60 {"spartan3an", 0xb}, 61 {"spartan3adsp", 0xc}, 62 {"spartan6", 0xd}, 63 {"virtex6", 0xe}, 64 /* FIXME There is no key code defined for spartan2 */ 65 {"spartan2", 0xf0}, 66 {"kintex7", 0x10}, 67 {"artix7", 0x11}, 68 {"zynq7000", 0x12}, 69 {NULL, 0}, 70 }; 71 72 struct cpuinfo cpuinfo; 73 static struct device_node *cpu; 74 75 void __init setup_cpuinfo(void) 76 { 77 cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu"); 78 if (!cpu) 79 pr_err("You don't have cpu!!!\n"); 80 81 pr_info("%s: initialising\n", __func__); 82 83 switch (cpu_has_pvr()) { 84 case 0: 85 pr_warn("%s: No PVR support. Using static CPU info from FDT\n", 86 __func__); 87 set_cpuinfo_static(&cpuinfo, cpu); 88 break; 89 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a 90 * please do not use FULL PVR with MMU */ 91 case 1: 92 pr_info("%s: Using full CPU PVR support\n", 93 __func__); 94 set_cpuinfo_static(&cpuinfo, cpu); 95 set_cpuinfo_pvr_full(&cpuinfo, cpu); 96 break; 97 default: 98 pr_warn("%s: Unsupported PVR setting\n", __func__); 99 set_cpuinfo_static(&cpuinfo, cpu); 100 } 101 102 if (cpuinfo.mmu_privins) 103 pr_warn("%s: Stream instructions enabled" 104 " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__); 105 } 106 107 void __init setup_cpuinfo_clk(void) 108 { 109 struct clk *clk; 110 111 clk = of_clk_get(cpu, 0); 112 if (IS_ERR(clk)) { 113 pr_err("ERROR: CPU CCF input clock not found\n"); 114 /* take timebase-frequency from DTS */ 115 cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency"); 116 } else { 117 cpuinfo.cpu_clock_freq = clk_get_rate(clk); 118 } 119 120 if (!cpuinfo.cpu_clock_freq) { 121 pr_err("ERROR: CPU clock frequency not setup\n"); 122 BUG(); 123 } 124 } 125