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()
107 		c->options |= LOONGARCH_CPU_LAM;  in cpu_probe_common()
111 		c->options |= LOONGARCH_CPU_FPU;  in cpu_probe_common()
115 		c->options |= LOONGARCH_CPU_COMPLEX;  in cpu_probe_common()
119 		c->options |= LOONGARCH_CPU_CRYPTO;  in cpu_probe_common()
123 		c->options |= LOONGARCH_CPU_LVZ;  in cpu_probe_common()
129 		c->options |= LOONGARCH_CPU_PMP;  in cpu_probe_common()
133 		c->options |= LOONGARCH_CPU_CSRIPI;  in cpu_probe_common()
135 		c->options |= LOONGARCH_CPU_EXTIOI;  in cpu_probe_common()
137 		c->options |= LOONGARCH_CPU_SCALEFREQ;  in cpu_probe_common()
139 		c->options |= LOONGARCH_CPU_FLATMODE;  in cpu_probe_common()
141 		c->options |= LOONGARCH_CPU_EIODECODE;  in cpu_probe_common()
143 		c->options |= LOONGARCH_CPU_HYPERVISOR;  in cpu_probe_common()
147 	asid_mask = GENMASK(config - 1, 0);  in cpu_probe_common()
151 	c->ksave_mask = GENMASK((config & CSR_CONF1_KSNUM) - 1, 0);  in cpu_probe_common()
152 	c->ksave_mask &= ~(EXC_KSAVE_MASK | PERCPU_KSAVE_MASK | KVM_KSAVE_MASK);  in cpu_probe_common()
157 		c->tlbsizemtlb = 0;  in cpu_probe_common()
158 		c->tlbsizestlbsets = 0;  in cpu_probe_common()
159 		c->tlbsizestlbways = 0;  in cpu_probe_common()
160 		c->tlbsize = 0;  in cpu_probe_common()
163 		c->tlbsizemtlb = ((config & CSR_CONF3_MTLBSIZE) >> CSR_CONF3_MTLBSIZE_SHIFT) + 1;  in cpu_probe_common()
164 		c->tlbsizestlbsets = 0;  in cpu_probe_common()
165 		c->tlbsizestlbways = 0;  in cpu_probe_common()
166 		c->tlbsize = c->tlbsizemtlb + c->tlbsizestlbsets * c->tlbsizestlbways;  in cpu_probe_common()
169 		c->tlbsizemtlb = ((config & CSR_CONF3_MTLBSIZE) >> CSR_CONF3_MTLBSIZE_SHIFT) + 1;  in cpu_probe_common()
170 		c->tlbsizestlbsets = 1 << ((config & CSR_CONF3_STLBIDX) >> CSR_CONF3_STLBIDX_SHIFT);  in cpu_probe_common()
171 		c->tlbsizestlbways = ((config & CSR_CONF3_STLBWAYS) >> CSR_CONF3_STLBWAYS_SHIFT) + 1;  in cpu_probe_common()
172 		c->tlbsize = c->tlbsizemtlb + c->tlbsizestlbsets * c->tlbsizestlbways;  in cpu_probe_common()
183 static char cpu_full_name[MAX_NAME_LEN] = "        -        ";
196 	switch (c->processor_id & PRID_SERIES_MASK) {  in cpu_probe_loongson()
198 		c->cputype = CPU_LOONGSON32;  in cpu_probe_loongson()
200 		__cpu_family[cpu] = "Loongson-32bit";  in cpu_probe_loongson()
201 		pr_info("32-bit Loongson Processor probed (LA132 Core)\n");  in cpu_probe_loongson()
204 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
206 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
207 		pr_info("64-bit Loongson Processor probed (LA264 Core)\n");  in cpu_probe_loongson()
210 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
212 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
213 		pr_info("64-bit Loongson Processor probed (LA364 Core)\n");  in cpu_probe_loongson()
216 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
218 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
219 		pr_info("64-bit Loongson Processor probed (LA464 Core)\n");  in cpu_probe_loongson()
222 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
224 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
225 		pr_info("64-bit Loongson Processor probed (LA664 Core)\n");  in cpu_probe_loongson()
228 		c->cputype = CPU_LOONGSON64;  in cpu_probe_loongson()
230 		__cpu_family[cpu] = "Loongson-64bit";  in cpu_probe_loongson()
231 		pr_info("64-bit Loongson Processor probed (Unknown Core)\n");  in cpu_probe_loongson()
250 		smp_processor_id(), c->processor_id, cpu_family_string());  in cpu_report()
251 	if (c->options & LOONGARCH_CPU_FPU)  in cpu_report()
252 		pr_info("FPU%d revision is: %08x\n", smp_processor_id(), c->fpu_vers);  in cpu_report()
266 	c->cputype	= CPU_UNKNOWN;  in cpu_probe()
267 	c->processor_id = read_cpucfg(LOONGARCH_CPUCFG0);  in cpu_probe()
268 	c->fpu_vers     = (read_cpucfg(LOONGARCH_CPUCFG2) & CPUCFG2_FPVERS) >> 3;  in cpu_probe()
270 	c->fpu_csr0	= FPU_CSR_RN;  in cpu_probe()
271 	c->fpu_mask	= FPU_CSR_RSVD;  in cpu_probe()
277 	switch (c->processor_id & PRID_COMP_MASK) {  in cpu_probe()
284 	BUG_ON(c->cputype == CPU_UNKNOWN);  in cpu_probe()
290 		__ua_limit = ~((1ull << cpu_vabits) - 1);  in cpu_probe()