[AVR32] Provide more CPU information in /proc/cpuinfo and dmesg

Add the following fields to /proc/cpuinfo:
  * chip type and revision (from the JTAG chip id)
  * cpu MHz (from clk_get_rate())
  * features (from the CONFIG0 register)

Also rename "cpu family" to "cpu arch" and "cpu type" to "cpu core" to
remove some ambiguity.

Show chip type and revision at bootup, and clarify that the other
kinds of IDs that we're already printing are for the cpu core and
architecture. Rename "AP7000" to "AP7" since that's the name of the
core.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/kernel/cpu.c

@@ -13,6 +13,7 @@
 #include <linux/percpu.h>
 #include <linux/param.h>
 #include <linux/errno.h>
+#include <linux/clk.h>
 
 #include <asm/setup.h>
 #include <asm/sysreg.h>
@@ -187,9 +188,20 @@ static int __init topology_init(void)
 
 subsys_initcall(topology_init);
 
+struct chip_id_map {
+	u16	mid;
+	u16	pn;
+	const char *name;
+};
+
+static const struct chip_id_map chip_names[] = {
+	{ .mid = 0x1f, .pn = 0x1e82, .name = "AT32AP700x" },
+};
+#define NR_CHIP_NAMES ARRAY_SIZE(chip_names)
+
 static const char *cpu_names[] = {
 	"Morgan",
-	"AP7000",
+	"AP7",
 };
 #define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
 
@@ -206,12 +218,32 @@ static const char *mmu_types[] = {
 	"MPU"
 };
 
+static const char *cpu_feature_flags[] = {
+	"rmw", "dsp", "simd", "ocd", "perfctr", "java", "fpu",
+};
+
+static const char *get_chip_name(struct avr32_cpuinfo *cpu)
+{
+	unsigned int i;
+	unsigned int mid = avr32_get_manufacturer_id(cpu);
+	unsigned int pn = avr32_get_product_number(cpu);
+
+	for (i = 0; i < NR_CHIP_NAMES; i++) {
+		if (chip_names[i].mid == mid && chip_names[i].pn == pn)
+			return chip_names[i].name;
+	}
+
+	return "(unknown)";
+}
+
 void __init setup_processor(void)
 {
 	unsigned long config0, config1;
 	unsigned long features;
 	unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
+	unsigned device_id;
 	unsigned tmp;
+	unsigned i;
 
 	config0 = sysreg_read(CONFIG0);
 	config1 = sysreg_read(CONFIG1);
@@ -221,11 +253,14 @@ void __init setup_processor(void)
 	arch_rev = SYSREG_BFEXT(AR, config0);
 	mmu_type = SYSREG_BFEXT(MMUT, config0);
 
+	device_id = ocd_read(DID);
+
 	boot_cpu_data.arch_type = arch_id;
 	boot_cpu_data.cpu_type = cpu_id;
 	boot_cpu_data.arch_revision = arch_rev;
 	boot_cpu_data.cpu_revision = cpu_rev;
 	boot_cpu_data.tlb_config = mmu_type;
+	boot_cpu_data.device_id = device_id;
 
 	tmp = SYSREG_BFEXT(ILSZ, config1);
 	if (tmp) {
@@ -247,41 +282,34 @@ void __init setup_processor(void)
 		return;
 	}
 
-	printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
+	printk ("CPU: %s chip revision %c\n", get_chip_name(&boot_cpu_data),
+			avr32_get_chip_revision(&boot_cpu_data) + 'A');
+	printk ("CPU: %s [%02x] core revision %d (%s arch revision %d)\n",
 		cpu_names[cpu_id], cpu_id, cpu_rev,
 		arch_names[arch_id], arch_rev);
 	printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
 
 	printk ("CPU: features:");
 	features = 0;
-	if (config0 & SYSREG_BIT(CONFIG0_R)) {
+	if (config0 & SYSREG_BIT(CONFIG0_R))
 		features |= AVR32_FEATURE_RMW;
-		printk(" rmw");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_D)) {
+	if (config0 & SYSREG_BIT(CONFIG0_D))
 		features |= AVR32_FEATURE_DSP;
-		printk(" dsp");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_S)) {
+	if (config0 & SYSREG_BIT(CONFIG0_S))
 		features |= AVR32_FEATURE_SIMD;
-		printk(" simd");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_O)) {
+	if (config0 & SYSREG_BIT(CONFIG0_O))
 		features |= AVR32_FEATURE_OCD;
-		printk(" ocd");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_P)) {
+	if (config0 & SYSREG_BIT(CONFIG0_P))
 		features |= AVR32_FEATURE_PCTR;
-		printk(" perfctr");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_J)) {
+	if (config0 & SYSREG_BIT(CONFIG0_J))
 		features |= AVR32_FEATURE_JAVA;
-		printk(" java");
-	}
-	if (config0 & SYSREG_BIT(CONFIG0_F)) {
+	if (config0 & SYSREG_BIT(CONFIG0_F))
 		features |= AVR32_FEATURE_FPU;
-		printk(" fpu");
-	}
+
+	for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
+		if (features & (1 << i))
+			printk(" %s", cpu_feature_flags[i]);
+
 	printk("\n");
 	boot_cpu_data.features = features;
 }
@@ -291,6 +319,8 @@ static int c_show(struct seq_file *m, void *v)
 {
 	unsigned int icache_size, dcache_size;
 	unsigned int cpu = smp_processor_id();
+	unsigned int freq;
+	unsigned int i;
 
 	icache_size = boot_cpu_data.icache.ways *
 		boot_cpu_data.icache.sets *
@@ -301,15 +331,21 @@ static int c_show(struct seq_file *m, void *v)
 
 	seq_printf(m, "processor\t: %d\n", cpu);
 
+	seq_printf(m, "chip type\t: %s revision %c\n",
+			get_chip_name(&boot_cpu_data),
+			avr32_get_chip_revision(&boot_cpu_data) + 'A');
 	if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
-		seq_printf(m, "cpu family\t: %s revision %d\n",
+		seq_printf(m, "cpu arch\t: %s revision %d\n",
 			   arch_names[boot_cpu_data.arch_type],
 			   boot_cpu_data.arch_revision);
 	if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
-		seq_printf(m, "cpu type\t: %s revision %d\n",
+		seq_printf(m, "cpu core\t: %s revision %d\n",
 			   cpu_names[boot_cpu_data.cpu_type],
 			   boot_cpu_data.cpu_revision);
 
+	freq = (clk_get_rate(boot_cpu_data.clk) + 500) / 1000;
+	seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, freq % 1000);
+
 	seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
 		   icache_size >> 10,
 		   boot_cpu_data.icache.ways,
@@ -320,7 +356,13 @@ static int c_show(struct seq_file *m, void *v)
 		   boot_cpu_data.dcache.ways,
 		   boot_cpu_data.dcache.sets,
 		   boot_cpu_data.dcache.linesz);
-	seq_printf(m, "bogomips\t: %lu.%02lu\n",
+
+	seq_printf(m, "features\t:");
+	for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
+		if (boot_cpu_data.features & (1 << i))
+			seq_printf(m, " %s", cpu_feature_flags[i]);
+
+	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 		   boot_cpu_data.loops_per_jiffy / (500000/HZ),
 		   (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
 

include/asm-avr32/processor.h

@@ -57,11 +57,25 @@ struct avr32_cpuinfo {
 	unsigned short cpu_revision;
 	enum tlb_config tlb_config;
 	unsigned long features;
+	u32 device_id;
 
 	struct cache_info icache;
 	struct cache_info dcache;
 };
 
+static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
+{
+	return (cpu->device_id >> 1) & 0x7f;
+}
+static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
+{
+	return (cpu->device_id >> 12) & 0xffff;
+}
+static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
+{
+	return (cpu->device_id >> 28) & 0x0f;
+}
+
 extern struct avr32_cpuinfo boot_cpu_data;
 
 #ifdef CONFIG_SMP