MIPS: Add Cavium OCTEON processor constants and CPU probe.

Add OCTEON constants to asm/cpu.h and asm/module.h.

Add probe function for Cavium OCTEON CPUs and hook it up.

Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 41 insertions, 0 deletions

diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 229a786101d..c018727c7dd 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -33,6 +33,7 @@
 #define PRID_COMP_TOSHIBA       0x070000
 #define PRID_COMP_LSI           0x080000
 #define PRID_COMP_LEXRA         0x0b0000
+#define PRID_COMP_CAVIUM        0x0d0000
 
 
 /*
@@ -114,6 +115,18 @@
 #define PRID_IMP_BCM3302        0x9000
 
 /*
+ * These are the PRID's for when 23:16 == PRID_COMP_CAVIUM
+ */
+
+#define PRID_IMP_CAVIUM_CN38XX 0x0000
+#define PRID_IMP_CAVIUM_CN31XX 0x0100
+#define PRID_IMP_CAVIUM_CN30XX 0x0200
+#define PRID_IMP_CAVIUM_CN58XX 0x0300
+#define PRID_IMP_CAVIUM_CN56XX 0x0400
+#define PRID_IMP_CAVIUM_CN50XX 0x0600
+#define PRID_IMP_CAVIUM_CN52XX 0x0700
+
+/*
  * Definitions for 7:0 on legacy processors
  */
 
@@ -203,6 +216,7 @@ enum cpu_type_enum {
          * MIPS64 class processors
          */
         CPU_5KC, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
+        CPU_CAVIUM_OCTEON,
 
         CPU_LAST
 };
diff --git a/arch/mips/include/asm/module.h b/arch/mips/include/asm/module.h
index e2e09b2cd26..d94085a3eaf 100644
--- a/arch/mips/include/asm/module.h
+++ b/arch/mips/include/asm/module.h
@@ -116,6 +116,8 @@ search_module_dbetables(unsigned long addr)
 #define MODULE_PROC_FAMILY "SB1 "
 #elif defined CONFIG_CPU_LOONGSON2
 #define MODULE_PROC_FAMILY "LOONGSON2 "
+#elif defined CONFIG_CPU_CAVIUM_OCTEON
+#define MODULE_PROC_FAMILY "OCTEON "
 #else
 #error MODULE_PROC_FAMILY undefined for your processor configuration
 #endif
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index c9207b5fd92..6b3c63dd181 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -154,6 +154,7 @@ void __init check_wait(void)
         case CPU_25KF:
         case CPU_PR4450:
         case CPU_BCM3302:
+        case CPU_CAVIUM_OCTEON:
                 cpu_wait = r4k_wait;
                 break;
 
@@ -875,6 +876,27 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
         }
 }
 
+static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu)
+{
+        decode_configs(c);
+        switch (c->processor_id & 0xff00) {
+        case PRID_IMP_CAVIUM_CN38XX:
+        case PRID_IMP_CAVIUM_CN31XX:
+        case PRID_IMP_CAVIUM_CN30XX:
+        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";
+                break;
+        default:
+                printk(KERN_INFO "Unknown Octeon chip!\n");
+                c->cputype = CPU_UNKNOWN;
+                break;
+        }
+}
+
 const char *__cpu_name[NR_CPUS];
 
 __cpuinit void cpu_probe(void)
@@ -909,6 +931,9 @@ __cpuinit void cpu_probe(void)
         case PRID_COMP_NXP:
                 cpu_probe_nxp(c, cpu);
                 break;
+        case PRID_COMP_CAVIUM:
+                cpu_probe_cavium(c, cpu);
+                break;
         }
 
         BUG_ON(!__cpu_name[cpu]);