arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c

   1 /*
   2  * Support for MicroBlaze PVR (processor version register)
   3  *
   4  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   5  * Copyright (C) 2007-2009 PetaLogix
   6  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License. See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/string.h>
  15 #include <asm/pvr.h>
  16 #include <asm/cpuinfo.h>
  17
  18 /*
  19  * Helper macro to map between fields in our struct cpuinfo, and
  20  * the PVR macros in pvr.h.
  21  */
  22
  23 #define CI(c, p) { ci->c = PVR_##p(pvr); }
  24
  25 #if defined(CONFIG_EARLY_PRINTK) && defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
  26 #define err_printk(x) \
  27         early_printk("ERROR: Microblaze " x "-different for PVR and DTS\n");
  28 #else
  29 #define err_printk(x) \
  30         printk(KERN_INFO "ERROR: Microblaze " x "-different for PVR and DTS\n");
  31 #endif
  32
  33 void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu)
  34 {
  35         struct pvr_s pvr;
  36         int temp; /* for saving temp value */
  37         get_pvr(&pvr);
  38
  39         CI(ver_code, VERSION);
  40         if (!ci->ver_code) {
  41                 printk(KERN_ERR "ERROR: MB has broken PVR regs "
  42                                                 "-> use DTS setting\n");
  43                 return;
  44         }
  45
  46         temp = PVR_USE_BARREL(pvr) | PVR_USE_MSR_INSTR(pvr) |\
  47                 PVR_USE_PCMP_INSTR(pvr) | PVR_USE_DIV(pvr);
  48         if (ci->use_instr != temp)
  49                 err_printk("BARREL, MSR, PCMP or DIV");
  50         ci->use_instr = temp;
  51
  52         temp = PVR_USE_HW_MUL(pvr) | PVR_USE_MUL64(pvr);
  53         if (ci->use_mult != temp)
  54                 err_printk("HW_MUL");
  55         ci->use_mult = temp;
  56
  57         temp = PVR_USE_FPU(pvr) | PVR_USE_FPU2(pvr);
  58         if (ci->use_fpu != temp)
  59                 err_printk("HW_FPU");
  60         ci->use_fpu = temp;
  61
  62         ci->use_exc = PVR_OPCODE_0x0_ILLEGAL(pvr) |\
  63                         PVR_UNALIGNED_EXCEPTION(pvr) |\
  64                         PVR_ILL_OPCODE_EXCEPTION(pvr) |\
  65                         PVR_IOPB_BUS_EXCEPTION(pvr) |\
  66                         PVR_DOPB_BUS_EXCEPTION(pvr) |\
  67                         PVR_DIV_ZERO_EXCEPTION(pvr) |\
  68                         PVR_FPU_EXCEPTION(pvr) |\
  69                         PVR_FSL_EXCEPTION(pvr);
  70
  71         CI(pvr_user1, USER1);
  72         CI(pvr_user2, USER2);
  73
  74         CI(mmu, USE_MMU);
  75         CI(endian, ENDIAN);
  76
  77         CI(use_icache, USE_ICACHE);
  78         CI(icache_tagbits, ICACHE_ADDR_TAG_BITS);
  79         CI(icache_write, ICACHE_ALLOW_WR);
  80         ci->icache_line_length = PVR_ICACHE_LINE_LEN(pvr) << 2;
  81         CI(icache_size, ICACHE_BYTE_SIZE);
  82         CI(icache_base, ICACHE_BASEADDR);
  83         CI(icache_high, ICACHE_HIGHADDR);
  84
  85         CI(use_dcache, USE_DCACHE);
  86         CI(dcache_tagbits, DCACHE_ADDR_TAG_BITS);
  87         CI(dcache_write, DCACHE_ALLOW_WR);
  88         ci->dcache_line_length = PVR_DCACHE_LINE_LEN(pvr) << 2;
  89         CI(dcache_size, DCACHE_BYTE_SIZE);
  90         CI(dcache_base, DCACHE_BASEADDR);
  91         CI(dcache_high, DCACHE_HIGHADDR);
  92
  93         temp = PVR_DCACHE_USE_WRITEBACK(pvr);
  94         if (ci->dcache_wb != temp)
  95                 err_printk("DCACHE WB");
  96         ci->dcache_wb = temp;
  97
  98         CI(use_dopb, D_OPB);
  99         CI(use_iopb, I_OPB);
 100         CI(use_dlmb, D_LMB);
 101         CI(use_ilmb, I_LMB);
 102         CI(num_fsl, FSL_LINKS);
 103
 104         CI(irq_edge, INTERRUPT_IS_EDGE);
 105         CI(irq_positive, EDGE_IS_POSITIVE);
 106
 107         CI(area_optimised, AREA_OPTIMISED);
 108
 109         CI(hw_debug, DEBUG_ENABLED);
 110         CI(num_pc_brk, NUMBER_OF_PC_BRK);
 111         CI(num_rd_brk, NUMBER_OF_RD_ADDR_BRK);
 112         CI(num_wr_brk, NUMBER_OF_WR_ADDR_BRK);
 113
 114         CI(fpga_family_code, TARGET_FAMILY);
 115
 116         /* take timebase-frequency from DTS */
 117         ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency");
 118 }