1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
16 #include <asm/cpu-features.h>
20 #include <asm/pgtable-bits.h>
34 	fcsr = c->fpu_csr0;  in cpu_set_fpu_fcsr_mask()
52 	c->fpu_mask = ~(fcsr0 ^ fcsr1) & ~mask;  in cpu_set_fpu_fcsr_mask()
68 	c->pabits = (read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_PABITS) >> 4;  in cpu_probe_addrbits()
69 	c->vabits = (read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_VABITS) >> 12;  in cpu_probe_addrbits()
70 	vm_map_base = 0UL - (1UL << c->vabits);  in cpu_probe_addrbits()
78 		c->isa_level |= LOONGARCH_CPU_ISA_LA64;  in set_isa()
81 		c->isa_level |= LOONGARCH_CPU_ISA_LA32S;  in set_isa()
84 		c->isa_level |= LOONGARCH_CPU_ISA_LA32R;  in set_isa()
94 	c->options = LOONGARCH_CPU_CPUCFG | LOONGARCH_CPU_CSR |  in cpu_probe_common()
101 		c->options |= LOONGARCH_CPU_UAL;  in cpu_probe_common()
105 		c->options |= LOONGARCH_CPU_CRC32;  in cpu_probe_common()
112 		c->options |= LOONGARCH_CPU_LAM;  in cpu_probe_common()
116 		c->options |= LOONGARCH_CPU_FPU;  in cpu_probe_common()
121 		c->options |= LOONGARCH_CPU_LSX;  in cpu_probe_common()
127 		c->options |= LOONGARCH_CPU_LASX;  in cpu_probe_common()
132 		c->options |= LOONGARCH_CPU_COMPLEX;  in cpu_probe_common()
136 		c->options |= LOONGARCH_CPU_CRYPTO;  in cpu_probe_common()
140 		c->options |= LOONGARCH_CPU_PTW;  in cpu_probe_common()
144 		c->options |= LOONGARCH_CPU_LVZ;  in cpu_probe_common()
149 		c->options |= LOONGARCH_CPU_LBT_X86;  in cpu_probe_common()
153 		c->options |= LOONGARCH_CPU_LBT_ARM;  in cpu_probe_common()
157 		c->options |= LOONGARCH_CPU_LBT_MIPS;  in cpu_probe_common()
164 		c->options |= LOONGARCH_CPU_PMP;  in cpu_probe_common()
168 		c->options |= LOONGARCH_CPU_CSRIPI;  in cpu_probe_common()
170 		c->options |= LOONGARCH_CPU_EXTIOI;  in cpu_probe_common()
172 		c->options |= LOONGARCH_CPU_SCALEFREQ;  in cpu_probe_common()
174 		c->options |= LOONGARCH_CPU_FLATMODE;  in cpu_probe_common()
176 		c->options |= LOONGARCH_CPU_EIODECODE;  in cpu_probe_common()
178 		c->options |= LOONGARCH_CPU_HYPERVISOR;  in cpu_probe_common()
182 	asid_mask = GENMASK(config - 1, 0);  in cpu_probe_common()
186 	c->ksave_mask = GENMASK((config & CSR_CONF1_KSNUM) - 1, 0);  in cpu_probe_common()
187 	c->ksave_mask &= ~(EXC_KSAVE_MASK | PERCPU_KSAVE_MASK | KVM_KSAVE_MASK);  in cpu_probe_common()
192 		c->tlbsizemtlb = 0;  in cpu_probe_common()
193 		c->tlbsizestlbsets = 0;  in cpu_probe_common()
194 		c->tlbsizestlbways = 0;  in cpu_probe_common()
195 		c->tlbsize = 0;  in cpu_probe_common()
197 	case 1:  in cpu_probe_common()
198 		c->tlbsizemtlb = ((config & CSR_CONF3_MTLBSIZE) >> CSR_CONF3_MTLBSIZE_SHIFT) + 1;  in cpu_probe_common()
199 		c->tlbsizestlbsets = 0;  in cpu_probe_common()
200 		c->tlbsizestlbways = 0;  in cpu_probe_common()
201 		c->tlbsize = c->tlbsizemtlb + c->tlbsizestlbsets * c->tlbsizestlbways;  in cpu_probe_common()
204 		c->tlbsizemtlb = ((config & CSR_CONF3_MTLBSIZE) >> CSR_CONF3_MTLBSIZE_SHIFT) + 1;  in cpu_probe_common()
205 		c->tlbsizestlbsets = 1 << ((config & CSR_CONF3_STLBIDX) >> CSR_CONF3_STLBIDX_SHIFT);  in cpu_probe_common()
206 		c->tlbsizestlbways = ((config & CSR_CONF3_STLBWAYS) >> CSR_CONF3_STLBWAYS_SHIFT) + 1;  in cpu_probe_common()
207 		c->tlbsize = c->tlbsizemtlb + c->tlbsizestlbsets * c->tlbsizestlbways;  in cpu_probe_common()
218 static char cpu_full_name[MAX_NAME_LEN] = "        -        ";
231 	switch (c->processor_id & PRID_SERIES_MASK) {  in cpu_probe_loongson()
233 		c->cputype = CPU_LOONGSON32;  in cpu_probe_loongson()
235 		__cpu_family[cpu] = "Loongson-32bit";  in cpu_probe_loongson()
236 		pr_info("32-bit Loongson Processor probed (LA132 Core)\n");  in cpu_probe_loongson()
239 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
241 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
242 		pr_info("64-bit Loongson Processor probed (LA264 Core)\n");  in cpu_probe_loongson()
245 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
247 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
248 		pr_info("64-bit Loongson Processor probed (LA364 Core)\n");  in cpu_probe_loongson()
251 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
253 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
254 		pr_info("64-bit Loongson Processor probed (LA464 Core)\n");  in cpu_probe_loongson()
257 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
259 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
260 		pr_info("64-bit Loongson Processor probed (LA664 Core)\n");  in cpu_probe_loongson()
263 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
265 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
266 		pr_info("64-bit Loongson Processor probed (Unknown Core)\n");  in cpu_probe_loongson()
285 		smp_processor_id(), c->processor_id, cpu_family_string());  in cpu_report()
286 	if (c->options & LOONGARCH_CPU_FPU)  in cpu_report()
287 		pr_info("FPU%d revision is: %08x\n", smp_processor_id(), c->fpu_vers);  in cpu_report()
301 	c->cputype	= CPU_UNKNOWN;  in cpu_probe()
302 	c->processor_id = read_cpucfg(LOONGARCH_CPUCFG0);  in cpu_probe()
303 	c->fpu_vers     = (read_cpucfg(LOONGARCH_CPUCFG2) & CPUCFG2_FPVERS) >> 3;  in cpu_probe()
305 	c->fpu_csr0	= FPU_CSR_RN;  in cpu_probe()
306 	c->fpu_mask	= FPU_CSR_RSVD;  in cpu_probe()
312 	switch (c->processor_id & PRID_COMP_MASK) {  in cpu_probe()
319 	BUG_ON(c->cputype == CPU_UNKNOWN);  in cpu_probe()
325 		__ua_limit = ~((1ull << cpu_vabits) - 1);  in cpu_probe()