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[PATCH 08/21] MIPS: Add Cavium OCTEON processor constants and CPU probe.

To: linux-mips@linux-mips.org
Subject: [PATCH 08/21] MIPS: Add Cavium OCTEON processor constants and CPU probe.
From: David Daney <ddaney@caviumnetworks.com>
Date: Wed, 3 Dec 2008 15:44:18 -0800
Cc: David Daney <ddaney@caviumnetworks.com>, Tomaso Paoletti <tpaoletti@caviumnetworks.com>
In-reply-to: <493718EA.40703@caviumnetworks.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <493718EA.40703@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
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>
---
 arch/mips/include/asm/cpu.h    |   14 ++++++++++++++
 arch/mips/include/asm/module.h |    2 ++
 arch/mips/kernel/cpu-probe.c   |   25 +++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 0 deletions(-)

diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 229a786..c018727 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 e2e09b2..d94085a 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 c9207b5..6b3c63d 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]);
-- 
1.5.6.5


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