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authorDavid Daney <ddaney@caviumnetworks.com>2008-12-12 00:33:26 +0100
committerRalf Baechle <ralf@linux-mips.org>2009-01-11 10:57:22 +0100
commit0dd4781bca56871434507ed35d5bb8ef92077907 (patch)
tree70304b84fd7a264a4e1756c485ad5a0bf1630282
parentMIPS: Override assembler target architecture for octeon. (diff)
downloadlinux-0dd4781bca56871434507ed35d5bb8ef92077907.tar.xz
linux-0dd4781bca56871434507ed35d5bb8ef92077907.zip
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>
-rw-r--r--arch/mips/include/asm/cpu.h14
-rw-r--r--arch/mips/include/asm/module.h2
-rw-r--r--arch/mips/kernel/cpu-probe.c25
3 files changed, 41 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 229a786101d9..c018727c7ddc 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 e2e09b2cd265..d94085a3eafb 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 c9207b5fd923..6b3c63dd1818 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]);