1 files changed, 66 insertions, 5 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 80e202eca056..3562b854f2cd 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -125,6 +125,30 @@ static int __init wait_disable(char *s)
 
 __setup("nowait", wait_disable);
 
+static int __cpuinitdata mips_fpu_disabled;
+
+static int __init fpu_disable(char *s)
+{
+	cpu_data[0].options &= ~MIPS_CPU_FPU;
+	mips_fpu_disabled = 1;
+
+	return 1;
+}
+
+__setup("nofpu", fpu_disable);
+
+int __cpuinitdata mips_dsp_disabled;
+
+static int __init dsp_disable(char *s)
+{
+	cpu_data[0].ases &= ~MIPS_ASE_DSP;
+	mips_dsp_disabled = 1;
+
+	return 1;
+}
+
+__setup("nodsp", dsp_disable);
+
 void __init check_wait(void)
 {
 	struct cpuinfo_mips *c = &current_cpu_data;
@@ -162,6 +186,7 @@ void __init check_wait(void)
 	case CPU_BCM6348:
 	case CPU_BCM6358:
 	case CPU_CAVIUM_OCTEON:
+	case CPU_CAVIUM_OCTEON_PLUS:
 		cpu_wait = r4k_wait;
 		break;
 
@@ -284,6 +309,15 @@ static inline int __cpu_has_fpu(void)
 	return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE);
 }
 
+static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
+{
+#ifdef __NEED_VMBITS_PROBE
+	write_c0_entryhi(0x3fffffffffffe000ULL);
+	back_to_back_c0_hazard();
+	c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL);
+#endif
+}
+
 #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
 		| MIPS_CPU_COUNTER)
 
@@ -691,6 +725,19 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
 	return config3 & MIPS_CONF_M;
 }
 
+static inline unsigned int decode_config4(struct cpuinfo_mips *c)
+{
+	unsigned int config4;
+
+	config4 = read_c0_config4();
+
+	if ((config4 & MIPS_CONF4_MMUEXTDEF) == MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT
+	    && cpu_has_tlb)
+		c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40;
+
+	return config4 & MIPS_CONF_M;
+}
+
 static void __cpuinit decode_configs(struct cpuinfo_mips *c)
 {
 	int ok;
@@ -709,6 +756,8 @@ static void __cpuinit decode_configs(struct cpuinfo_mips *c)
 		ok = decode_config2(c);
 	if (ok)
 		ok = decode_config3(c);
+	if (ok)
+		ok = decode_config4(c);
 
 	mips_probe_watch_registers(c);
 }
@@ -722,9 +771,6 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 		__cpu_name[cpu] = "MIPS 4Kc";
 		break;
 	case PRID_IMP_4KEC:
-		c->cputype = CPU_4KEC;
-		__cpu_name[cpu] = "MIPS 4KEc";
-		break;
 	case PRID_IMP_4KECR2:
 		c->cputype = CPU_4KEC;
 		__cpu_name[cpu] = "MIPS 4KEc";
@@ -890,12 +936,18 @@ static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu)
 	case PRID_IMP_CAVIUM_CN38XX:
 	case PRID_IMP_CAVIUM_CN31XX:
 	case PRID_IMP_CAVIUM_CN30XX:
+		c->cputype = CPU_CAVIUM_OCTEON;
+		__cpu_name[cpu] = "Cavium Octeon";
+		goto platform;
 	case PRID_IMP_CAVIUM_CN58XX:
 	case PRID_IMP_CAVIUM_CN56XX:
 	case PRID_IMP_CAVIUM_CN50XX:
 	case PRID_IMP_CAVIUM_CN52XX:
-		c->cputype = CPU_CAVIUM_OCTEON;
-		__cpu_name[cpu] = "Cavium Octeon";
+		c->cputype = CPU_CAVIUM_OCTEON_PLUS;
+		__cpu_name[cpu] = "Cavium Octeon+";
+platform:
+		if (cpu == 0)
+			__elf_platform = "octeon";
 		break;
 	default:
 		printk(KERN_INFO "Unknown Octeon chip!\n");
@@ -905,6 +957,7 @@ static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu)
 }
 
 const char *__cpu_name[NR_CPUS];
+const char *__elf_platform;
 
 __cpuinit void cpu_probe(void)
 {
@@ -953,6 +1006,12 @@ __cpuinit void cpu_probe(void)
 	 */
 	BUG_ON(current_cpu_type() != c->cputype);
 
+	if (mips_fpu_disabled)
+		c->options &= ~MIPS_CPU_FPU;
+
+	if (mips_dsp_disabled)
+		c->ases &= ~MIPS_ASE_DSP;
+
 	if (c->options & MIPS_CPU_FPU) {
 		c->fpu_id = cpu_get_fpu_id();
 
@@ -969,6 +1028,8 @@ __cpuinit void cpu_probe(void)
 		c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
 	else
 		c->srsets = 1;
+
+	cpu_probe_vmbits(c);
 }
 
 __cpuinit void cpu_report(void)