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 u32 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->pvr_user1 = fcpu(cpu, "xlnx,pvr-user1"); 117 ci->pvr_user2 = fcpu(cpu, "xlnx,pvr-user2"); 118 119 ci->mmu = fcpu(cpu, "xlnx,use-mmu"); 120 ci->mmu_privins = fcpu(cpu, "xlnx,mmu-privileged-instr"); 121 ci->endian = fcpu(cpu, "xlnx,endianness"); 122 123 ci->ver_code = 0; 124 ci->fpga_family_code = 0; 125 126 /* Do various fixups based on CPU version and FPGA family strings */ 127 128 /* Resolved the CPU version code */ 129 for (i = 0; cpu_ver_lookup[i].s != NULL; i++) { 130 if (strcmp(cpu_ver_lookup[i].s, cpu_ver_string) == 0) 131 ci->ver_code = cpu_ver_lookup[i].k; 132 } 133 134 /* Resolved the fpga family code */ 135 for (i = 0; family_string_lookup[i].s != NULL; i++) { 136 if (strcmp(family_string_lookup[i].s, family_string) == 0) 137 ci->fpga_family_code = family_string_lookup[i].k; 138 } 139 140 /* FIXME - mb3 and spartan2 do not exist in PVR */ 141 /* This is mb3 and on a non Spartan2 */ 142 if (ci->ver_code == 0x20 && ci->fpga_family_code != 0xf0) 143 /* Hardware Multiplier in use */ 144 ci->use_mult = 1; 145 } 146