In /proc/cpuinfo, we keep "cpu model" as is, since GCC should use it
for -march=native. Besides, we add __cpu_full_name[] to describe the
processor in a more human-readable manner. The full name is displayed
as "model name" in cpuinfo, which is needed by some userspace tools
such as gnome-system-monitor.
The CPU frequency in "model name" is the default value (highest), and
there is also a "CPU MHz" whose value can be changed by cpufreq.
This is only used by Loongson now (ICT is dropped in cpu name, and cpu
name can be overwritten by BIOS).
Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
---
arch/mips/include/asm/cpu-info.h | 2 ++
arch/mips/include/asm/mach-loongson64/boot_param.h | 1 +
arch/mips/include/asm/time.h | 2 ++
arch/mips/kernel/cpu-probe.c | 25 ++++++++++++++++------
arch/mips/kernel/proc.c | 6 ++++++
arch/mips/kernel/time.c | 2 ++
arch/mips/loongson64/common/env.c | 25 ++++++++++++++++++++++
7 files changed, 57 insertions(+), 6 deletions(-)
diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h
index cd6efb0..8a8a414 100644
--- a/arch/mips/include/asm/cpu-info.h
+++ b/arch/mips/include/asm/cpu-info.h
@@ -121,7 +121,9 @@ extern void cpu_probe(void);
extern void cpu_report(void);
extern const char *__cpu_name[];
+extern const char *__cpu_full_name[];
#define cpu_name_string() __cpu_name[raw_smp_processor_id()]
+#define cpu_full_name_string() __cpu_full_name[raw_smp_processor_id()]
struct seq_file;
struct notifier_block;
diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
index 9f9bb9c..b7ed31b 100644
--- a/arch/mips/include/asm/mach-loongson64/boot_param.h
+++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
@@ -57,6 +57,7 @@ struct efi_cpuinfo_loongson {
u16 reserved_cores_mask;
u32 cpu_clock_freq; /* cpu_clock */
u32 nr_cpus;
+ char cpuname[64];
} __packed;
#define MAX_UARTS 64
diff --git a/arch/mips/include/asm/time.h b/arch/mips/include/asm/time.h
index 17d4cd2..efbfc48 100644
--- a/arch/mips/include/asm/time.h
+++ b/arch/mips/include/asm/time.h
@@ -35,6 +35,8 @@ extern int rtc_mips_set_mmss(unsigned long);
*/
extern void plat_time_init(void);
+extern unsigned int mips_cpu_frequency;
+
/*
* mips_hpt_frequency - must be set if you intend to use an R4k-compatible
* counter as a timer interrupt source.
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 09462bb..e1df437 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1474,30 +1474,40 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
switch (c->processor_id & PRID_REV_MASK) {
case PRID_REV_LOONGSON2E:
c->cputype = CPU_LOONGSON2;
- __cpu_name[cpu] = "ICT Loongson-2";
+ __cpu_name[cpu] = "Loongson-2";
set_elf_platform(cpu, "loongson2e");
set_isa(c, MIPS_CPU_ISA_III);
c->fpu_msk31 |= FPU_CSR_CONDX;
+ __cpu_full_name[cpu] = "Loongson-2E";
break;
case PRID_REV_LOONGSON2F:
c->cputype = CPU_LOONGSON2;
- __cpu_name[cpu] = "ICT Loongson-2";
+ __cpu_name[cpu] = "Loongson-2";
set_elf_platform(cpu, "loongson2f");
set_isa(c, MIPS_CPU_ISA_III);
c->fpu_msk31 |= FPU_CSR_CONDX;
+ __cpu_full_name[cpu] = "Loongson-2F";
break;
case PRID_REV_LOONGSON3A_R1:
c->cputype = CPU_LOONGSON3;
- __cpu_name[cpu] = "ICT Loongson-3";
+ __cpu_name[cpu] = "Loongson-3";
set_elf_platform(cpu, "loongson3a");
set_isa(c, MIPS_CPU_ISA_M64R1);
+ __cpu_full_name[cpu] = "Loongson-3A R1 (Loongson-3A1000)";
break;
case PRID_REV_LOONGSON3B_R1:
+ c->cputype = CPU_LOONGSON3;
+ __cpu_name[cpu] = "Loongson-3";
+ set_elf_platform(cpu, "loongson3b");
+ set_isa(c, MIPS_CPU_ISA_M64R1);
+ __cpu_full_name[cpu] = "Loongson-3B R1 (Loongson-3B1000)";
+ break;
case PRID_REV_LOONGSON3B_R2:
c->cputype = CPU_LOONGSON3;
- __cpu_name[cpu] = "ICT Loongson-3";
+ __cpu_name[cpu] = "Loongson-3";
set_elf_platform(cpu, "loongson3b");
set_isa(c, MIPS_CPU_ISA_M64R1);
+ __cpu_full_name[cpu] = "Loongson-3B R2 (Loongson-3B1500)";
break;
}
@@ -1832,15 +1842,17 @@ static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu)
switch (c->processor_id & PRID_REV_MASK) {
case PRID_REV_LOONGSON3A_R2:
c->cputype = CPU_LOONGSON3;
- __cpu_name[cpu] = "ICT Loongson-3";
+ __cpu_name[cpu] = "Loongson-3";
set_elf_platform(cpu, "loongson3a");
set_isa(c, MIPS_CPU_ISA_M64R2);
+ __cpu_full_name[cpu] = "Loongson-3A R2 (Loongson-3A2000)";
break;
case PRID_REV_LOONGSON3A_R3:
c->cputype = CPU_LOONGSON3;
- __cpu_name[cpu] = "ICT Loongson-3";
+ __cpu_name[cpu] = "Loongson-3";
set_elf_platform(cpu, "loongson3a");
set_isa(c, MIPS_CPU_ISA_M64R2);
+ __cpu_full_name[cpu] = "Loongson-3A R3 (Loongson-3A3000)";
break;
}
@@ -1960,6 +1972,7 @@ EXPORT_SYMBOL(__ua_limit);
#endif
const char *__cpu_name[NR_CPUS];
+const char *__cpu_full_name[NR_CPUS];
const char *__elf_platform;
void cpu_probe(void)
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 4eff2ae..946ffee 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -14,6 +14,7 @@
#include <asm/mipsregs.h>
#include <asm/processor.h>
#include <asm/prom.h>
+#include <asm/time.h>
unsigned int vced_count, vcei_count;
@@ -62,6 +63,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, fmt, __cpu_name[n],
(version >> 4) & 0x0f, version & 0x0f,
(fp_vers >> 4) & 0x0f, fp_vers & 0x0f);
+ if (__cpu_full_name[n])
+ seq_printf(m, "model name\t\t: %s\n", __cpu_full_name[n]);
+ if (mips_cpu_frequency)
+ seq_printf(m, "CPU MHz\t\t\t: %u.%02u\n",
+ mips_cpu_frequency / 1000000, (mips_cpu_frequency / 10000) % 100);
seq_printf(m, "BogoMIPS\t\t: %u.%02u\n",
cpu_data[n].udelay_val / (500000/HZ),
(cpu_data[n].udelay_val / (5000/HZ)) % 100);
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index c036157..7350944 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -69,6 +69,8 @@ EXPORT_SYMBOL(perf_irq);
* 2) calculate a couple of cached variables for later usage
*/
+unsigned int mips_cpu_frequency;
+EXPORT_SYMBOL_GPL(mips_cpu_frequency);
unsigned int mips_hpt_frequency;
EXPORT_SYMBOL_GPL(mips_hpt_frequency);
diff --git a/arch/mips/loongson64/common/env.c b/arch/mips/loongson64/common/env.c
index 1e8a955..016f668 100644
--- a/arch/mips/loongson64/common/env.c
+++ b/arch/mips/loongson64/common/env.c
@@ -18,6 +18,7 @@
* option) any later version.
*/
#include <linux/export.h>
+#include <asm/time.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <boot_param.h>
@@ -25,6 +26,7 @@
u32 cpu_clock_freq;
EXPORT_SYMBOL(cpu_clock_freq);
+static char cpu_full_name[64];
struct efi_memory_map_loongson *loongson_memmap;
struct loongson_system_configuration loongson_sysconf;
@@ -151,6 +153,8 @@ void __init prom_init_env(void)
loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
loongson_sysconf.cores_per_node - 1) /
loongson_sysconf.cores_per_node;
+ if (!strncmp(ecpu->cpuname, "Loongson", 8))
+ strncpy(cpu_full_name, ecpu->cpuname, sizeof(cpu_full_name));
loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
@@ -210,5 +214,26 @@ void __init prom_init_env(void)
break;
}
}
+ mips_cpu_frequency = cpu_clock_freq;
pr_info("CpuClock = %u\n", cpu_clock_freq);
}
+
+static int __init overwrite_cpu_fullname(void)
+{
+ int cpu;
+ char freq[12];
+
+ if (cpu_full_name[0] == 0)
+ strcpy(cpu_full_name, __cpu_full_name[0]);
+
+ /* Append default cpu frequency with round-off */
+ sprintf(freq, " @ %uMHz", (cpu_clock_freq + 500000) / 1000000);
+ strncat(cpu_full_name, freq, sizeof(cpu_full_name));
+
+ for (cpu = 0; cpu < NR_CPUS; cpu++)
+ __cpu_full_name[cpu] = cpu_full_name;
+
+ return 0;
+}
+
+core_initcall(overwrite_cpu_fullname);
--
2.7.0
