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Linux/arch/microblaze/kernel/cpu/mb.c

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  1 /*
  2  * CPU-version specific code
  3  *
  4  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
  5  * Copyright (C) 2006-2009 PetaLogix
  6  *
  7  * This file is subject to the terms and conditions of the GNU General Public
  8  * License. See the file "COPYING" in the main directory of this archive
  9  * for more details.
 10  */
 11 
 12 #include <linux/init.h>
 13 #include <linux/string.h>
 14 #include <linux/seq_file.h>
 15 #include <linux/cpu.h>
 16 #include <linux/initrd.h>
 17 
 18 #include <linux/bug.h>
 19 #include <asm/cpuinfo.h>
 20 #include <linux/delay.h>
 21 #include <linux/io.h>
 22 #include <asm/page.h>
 23 #include <linux/param.h>
 24 #include <asm/pvr.h>
 25 #include <asm/sections.h>
 26 #include <asm/setup.h>
 27 
 28 static int show_cpuinfo(struct seq_file *m, void *v)
 29 {
 30         int count = 0;
 31         char *fpga_family = "Unknown";
 32         char *cpu_ver = "Unknown";
 33         int i;
 34 
 35         /* Denormalised to get the fpga family string */
 36         for (i = 0; family_string_lookup[i].s != NULL; i++) {
 37                 if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
 38                         fpga_family = (char *)family_string_lookup[i].s;
 39                         break;
 40                 }
 41         }
 42 
 43         /* Denormalised to get the hw version string */
 44         for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
 45                 if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
 46                         cpu_ver = (char *)cpu_ver_lookup[i].s;
 47                         break;
 48                 }
 49         }
 50 
 51         count = seq_printf(m,
 52                         "CPU-Family:    MicroBlaze\n"
 53                         "FPGA-Arch:     %s\n"
 54                         "CPU-Ver:       %s, %s endian\n"
 55                         "CPU-MHz:       %d.%02d\n"
 56                         "BogoMips:      %lu.%02lu\n",
 57                         fpga_family,
 58                         cpu_ver,
 59                         cpuinfo.endian ? "little" : "big",
 60                         cpuinfo.cpu_clock_freq /
 61                         1000000,
 62                         cpuinfo.cpu_clock_freq %
 63                         1000000,
 64                         loops_per_jiffy / (500000 / HZ),
 65                         (loops_per_jiffy / (5000 / HZ)) % 100);
 66 
 67         count += seq_printf(m,
 68                 "HW:\n Shift:\t\t%s\n"
 69                 " MSR:\t\t%s\n"
 70                 " PCMP:\t\t%s\n"
 71                 " DIV:\t\t%s\n",
 72                 (cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
 73                 (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
 74                 (cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
 75                 (cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
 76 
 77         count += seq_printf(m,
 78                         " MMU:\t\t%x\n",
 79                         cpuinfo.mmu);
 80 
 81         count += seq_printf(m,
 82                 " MUL:\t\t%s\n"
 83                 " FPU:\t\t%s\n",
 84                 (cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
 85                         (cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
 86                 (cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
 87                         (cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
 88 
 89         count += seq_printf(m,
 90                 " Exc:\t\t%s%s%s%s%s%s%s%s\n",
 91                 (cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
 92                 (cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
 93                 (cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
 94                 (cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
 95                 (cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
 96                 (cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
 97                 (cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
 98                 (cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
 99 
100         count += seq_printf(m,
101                         "Stream-insns:\t%sprivileged\n",
102                         cpuinfo.mmu_privins ? "un" : "");
103 
104         if (cpuinfo.use_icache)
105                 count += seq_printf(m,
106                                 "Icache:\t\t%ukB\tline length:\t%dB\n",
107                                 cpuinfo.icache_size >> 10,
108                                 cpuinfo.icache_line_length);
109         else
110                 count += seq_printf(m, "Icache:\t\tno\n");
111 
112         if (cpuinfo.use_dcache) {
113                 count += seq_printf(m,
114                                 "Dcache:\t\t%ukB\tline length:\t%dB\n",
115                                 cpuinfo.dcache_size >> 10,
116                                 cpuinfo.dcache_line_length);
117                 seq_printf(m, "Dcache-Policy:\t");
118                 if (cpuinfo.dcache_wb)
119                         count += seq_printf(m, "write-back\n");
120                 else
121                         count += seq_printf(m, "write-through\n");
122         } else
123                 count += seq_printf(m, "Dcache:\t\tno\n");
124 
125         count += seq_printf(m,
126                         "HW-Debug:\t%s\n",
127                         cpuinfo.hw_debug ? "yes" : "no");
128 
129         count += seq_printf(m,
130                         "PVR-USR1:\t%02x\n"
131                         "PVR-USR2:\t%08x\n",
132                         cpuinfo.pvr_user1,
133                         cpuinfo.pvr_user2);
134 
135         count += seq_printf(m, "Page size:\t%lu\n", PAGE_SIZE);
136         return 0;
137 }
138 
139 static void *c_start(struct seq_file *m, loff_t *pos)
140 {
141         int i = *pos;
142 
143         return i < NR_CPUS ? (void *) (i + 1) : NULL;
144 }
145 
146 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
147 {
148         ++*pos;
149         return c_start(m, pos);
150 }
151 
152 static void c_stop(struct seq_file *m, void *v)
153 {
154 }
155 
156 const struct seq_operations cpuinfo_op = {
157         .start = c_start,
158         .next = c_next,
159         .stop = c_stop,
160         .show = show_cpuinfo,
161 };
162 

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