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406107da MS |
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 | ||
595e8fab TK |
17 | static const char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY; |
18 | static const char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER; | |
406107da MS |
19 | |
20 | #define err_printk(x) \ | |
65d3db06 | 21 | early_printk("ERROR: Microblaze " x "-different for kernel and DTS\n"); |
406107da MS |
22 | |
23 | void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu) | |
24 | { | |
bdb96e3c | 25 | u32 i = 0; |
406107da MS |
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"); | |
44e4e196 MS |
75 | ci->icache_line_length = fcpu(cpu, "xlnx,icache-line-len") << 2; |
76 | if (!ci->icache_line_length) { | |
406107da | 77 | if (fcpu(cpu, "xlnx,icache-use-fsl")) |
44e4e196 | 78 | ci->icache_line_length = 4 << 2; |
406107da | 79 | else |
44e4e196 | 80 | ci->icache_line_length = 1 << 2; |
406107da MS |
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"); | |
44e4e196 MS |
89 | ci->dcache_line_length = fcpu(cpu, "xlnx,dcache-line-len") << 2; |
90 | if (!ci->dcache_line_length) { | |
406107da | 91 | if (fcpu(cpu, "xlnx,dcache-use-fsl")) |
44e4e196 | 92 | ci->dcache_line_length = 4 << 2; |
406107da | 93 | else |
44e4e196 | 94 | ci->dcache_line_length = 1 << 2; |
406107da MS |
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"); | |
e051af57 | 99 | ci->dcache_wb = fcpu(cpu, "xlnx,dcache-use-writeback"); |
406107da MS |
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 | ||
406107da MS |
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"); | |
8904976e | 120 | ci->mmu_privins = fcpu(cpu, "xlnx,mmu-privileged-instr"); |
8e2ad016 | 121 | ci->endian = fcpu(cpu, "xlnx,endianness"); |
406107da MS |
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 | } |