arch/microblaze/kernel/cpu/cpuinfo-static.c

   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/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/string.h>
  14 #include <asm/cpuinfo.h>
  15 #include <asm/pvr.h>
  16
  17 static const char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY;
  18 static const char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER;
  19
  20 #define err_printk(x) \
  21         early_printk("ERROR: Microblaze " x "-different for kernel and DTS\n");
  22
  23 void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu)
  24 {
  25         int i = 0;
  26
  27         ci->use_instr =
  28                 (fcpu(cpu, "xlnx,use-barrel") ? PVR0_USE_BARREL_MASK : 0) |
  29                 (fcpu(cpu, "xlnx,use-msr-instr") ? PVR2_USE_MSR_INSTR : 0) |
  30                 (fcpu(cpu, "xlnx,use-pcmp-instr") ? PVR2_USE_PCMP_INSTR : 0) |
  31                 (fcpu(cpu, "xlnx,use-div") ? PVR0_USE_DIV_MASK : 0);
  32         if (CONFIG_XILINX_MICROBLAZE0_USE_BARREL)
  33                 i |= PVR0_USE_BARREL_MASK;
  34         if (CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR)
  35                 i |= PVR2_USE_MSR_INSTR;
  36         if (CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR)
  37                 i |= PVR2_USE_PCMP_INSTR;
  38         if (CONFIG_XILINX_MICROBLAZE0_USE_DIV)
  39                 i |= PVR0_USE_DIV_MASK;
  40         if (ci->use_instr != i)
  41                 err_printk("BARREL, MSR, PCMP or DIV");
  42
  43         ci->use_mult = fcpu(cpu, "xlnx,use-hw-mul");
  44         if (ci->use_mult != CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)
  45                 err_printk("HW_MUL");
  46         ci->use_mult =
  47                 (ci->use_mult > 1 ?
  48                                 (PVR2_USE_MUL64_MASK | PVR0_USE_HW_MUL_MASK) :
  49                                 (ci->use_mult == 1 ? PVR0_USE_HW_MUL_MASK : 0));
  50
  51         ci->use_fpu = fcpu(cpu, "xlnx,use-fpu");
  52         if (ci->use_fpu != CONFIG_XILINX_MICROBLAZE0_USE_FPU)
  53                 err_printk("HW_FPU");
  54         ci->use_fpu = (ci->use_fpu > 1 ?
  55                                 (PVR2_USE_FPU2_MASK | PVR0_USE_FPU_MASK) :
  56                                 (ci->use_fpu == 1 ? PVR0_USE_FPU_MASK : 0));
  57
  58         ci->use_exc =
  59                 (fcpu(cpu, "xlnx,unaligned-exceptions") ?
  60                                 PVR2_UNALIGNED_EXC_MASK : 0) |
  61                 (fcpu(cpu, "xlnx,ill-opcode-exception") ?
  62                                 PVR2_ILL_OPCODE_EXC_MASK : 0) |
  63                 (fcpu(cpu, "xlnx,iopb-bus-exception") ?
  64                                 PVR2_IOPB_BUS_EXC_MASK : 0) |
  65                 (fcpu(cpu, "xlnx,dopb-bus-exception") ?
  66                                 PVR2_DOPB_BUS_EXC_MASK : 0) |
  67                 (fcpu(cpu, "xlnx,div-zero-exception") ?
  68                                 PVR2_DIV_ZERO_EXC_MASK : 0) |
  69                 (fcpu(cpu, "xlnx,fpu-exception") ? PVR2_FPU_EXC_MASK : 0) |
  70                 (fcpu(cpu, "xlnx,fsl-exception") ? PVR2_USE_EXTEND_FSL : 0);
  71
  72         ci->use_icache = fcpu(cpu, "xlnx,use-icache");
  73         ci->icache_tagbits = fcpu(cpu, "xlnx,addr-tag-bits");
  74         ci->icache_write = fcpu(cpu, "xlnx,allow-icache-wr");
  75         ci->icache_line_length = fcpu(cpu, "xlnx,icache-line-len") << 2;
  76         if (!ci->icache_line_length) {
  77                 if (fcpu(cpu, "xlnx,icache-use-fsl"))
  78                         ci->icache_line_length = 4 << 2;
  79                 else
  80                         ci->icache_line_length = 1 << 2;
  81         }
  82         ci->icache_size = fcpu(cpu, "i-cache-size");
  83         ci->icache_base = fcpu(cpu, "i-cache-baseaddr");
  84         ci->icache_high = fcpu(cpu, "i-cache-highaddr");
  85
  86         ci->use_dcache = fcpu(cpu, "xlnx,use-dcache");
  87         ci->dcache_tagbits = fcpu(cpu, "xlnx,dcache-addr-tag");
  88         ci->dcache_write = fcpu(cpu, "xlnx,allow-dcache-wr");
  89         ci->dcache_line_length = fcpu(cpu, "xlnx,dcache-line-len") << 2;
  90         if (!ci->dcache_line_length) {
  91                 if (fcpu(cpu, "xlnx,dcache-use-fsl"))
  92                         ci->dcache_line_length = 4 << 2;
  93                 else
  94                         ci->dcache_line_length = 1 << 2;
  95         }
  96         ci->dcache_size = fcpu(cpu, "d-cache-size");
  97         ci->dcache_base = fcpu(cpu, "d-cache-baseaddr");
  98         ci->dcache_high = fcpu(cpu, "d-cache-highaddr");
  99         ci->dcache_wb = fcpu(cpu, "xlnx,dcache-use-writeback");
 100
 101         ci->use_dopb = fcpu(cpu, "xlnx,d-opb");
 102         ci->use_iopb = fcpu(cpu, "xlnx,i-opb");
 103         ci->use_dlmb = fcpu(cpu, "xlnx,d-lmb");
 104         ci->use_ilmb = fcpu(cpu, "xlnx,i-lmb");
 105
 106         ci->num_fsl = fcpu(cpu, "xlnx,fsl-links");
 107         ci->irq_edge = fcpu(cpu, "xlnx,interrupt-is-edge");
 108         ci->irq_positive = fcpu(cpu, "xlnx,edge-is-positive");
 109         ci->area_optimised = 0;
 110
 111         ci->hw_debug = fcpu(cpu, "xlnx,debug-enabled");
 112         ci->num_pc_brk = fcpu(cpu, "xlnx,number-of-pc-brk");
 113         ci->num_rd_brk = fcpu(cpu, "xlnx,number-of-rd-addr-brk");
 114         ci->num_wr_brk = fcpu(cpu, "xlnx,number-of-wr-addr-brk");
 115
 116         ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency");
 117
 118         ci->pvr_user1 = fcpu(cpu, "xlnx,pvr-user1");
 119         ci->pvr_user2 = fcpu(cpu, "xlnx,pvr-user2");
 120
 121         ci->mmu = fcpu(cpu, "xlnx,use-mmu");
 122         ci->mmu_privins = fcpu(cpu, "xlnx,mmu-privileged-instr");
 123         ci->endian = fcpu(cpu, "xlnx,endianness");
 124
 125         ci->ver_code = 0;
 126         ci->fpga_family_code = 0;
 127
 128         /* Do various fixups based on CPU version and FPGA family strings */
 129
 130         /* Resolved the CPU version code */
 131         for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
 132                 if (strcmp(cpu_ver_lookup[i].s, cpu_ver_string) == 0)
 133                         ci->ver_code = cpu_ver_lookup[i].k;
 134         }
 135
 136         /* Resolved the fpga family code */
 137         for (i = 0; family_string_lookup[i].s != NULL; i++) {
 138                 if (strcmp(family_string_lookup[i].s, family_string) == 0)
 139                         ci->fpga_family_code = family_string_lookup[i].k;
 140         }
 141
 142         /* FIXME - mb3 and spartan2 do not exist in PVR */
 143         /* This is mb3 and on a non Spartan2 */
 144         if (ci->ver_code == 0x20 && ci->fpga_family_code != 0xf0)
 145                 /* Hardware Multiplier in use */
 146                 ci->use_mult = 1;
 147 }