MIPS: Netlogic: XLP CPU support.
Add support for Netlogic's XLP MIPS SoC. This patch adds:
* XLP processor ID in cpu_probe.c and asm/cpu.h
* XLP case to asm/module.h
* CPU_XLP case to mm/tlbex.c
* minor change to r4k cache handling to ignore XLP secondary cache
* XLP cpu overrides to mach-netlogic/cpu-feature-overrides.h
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2966/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 2f7f418..6e94c7e 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -170,6 +170,7 @@
#define PRID_IMP_NETLOGIC_XLS408B 0x4e00
#define PRID_IMP_NETLOGIC_XLS404B 0x4f00
+#define PRID_IMP_NETLOGIC_XLP832 0x1000
/*
* Definitions for 7:0 on legacy processors
*/
@@ -263,7 +264,7 @@
*/
CPU_5KC, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
CPU_CAVIUM_OCTEON, CPU_CAVIUM_OCTEON_PLUS, CPU_CAVIUM_OCTEON2,
- CPU_XLR,
+ CPU_XLR, CPU_XLP,
CPU_LAST
};
diff --git a/arch/mips/include/asm/mach-netlogic/cpu-feature-overrides.h b/arch/mips/include/asm/mach-netlogic/cpu-feature-overrides.h
index 3780743..d193fb6 100644
--- a/arch/mips/include/asm/mach-netlogic/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-netlogic/cpu-feature-overrides.h
@@ -24,23 +24,33 @@
#define cpu_has_llsc 1
#define cpu_has_vtag_icache 0
-#define cpu_has_dc_aliases 0
#define cpu_has_ic_fills_f_dc 1
#define cpu_has_dsp 0
#define cpu_has_mipsmt 0
-#define cpu_has_userlocal 0
#define cpu_icache_snoops_remote_store 1
#define cpu_has_64bits 1
#define cpu_has_mips32r1 1
-#define cpu_has_mips32r2 0
#define cpu_has_mips64r1 1
-#define cpu_has_mips64r2 0
#define cpu_has_inclusive_pcaches 0
#define cpu_dcache_line_size() 32
#define cpu_icache_line_size() 32
+#if defined(CONFIG_CPU_XLR)
+#define cpu_has_userlocal 0
+#define cpu_has_dc_aliases 0
+#define cpu_has_mips32r2 0
+#define cpu_has_mips64r2 0
+#elif defined(CONFIG_CPU_XLP)
+#define cpu_has_userlocal 1
+#define cpu_has_mips32r2 1
+#define cpu_has_mips64r2 1
+#define cpu_has_dc_aliases 1
+#else
+#error "Unknown Netlogic CPU"
+#endif
+
#endif /* __ASM_MACH_NETLOGIC_CPU_FEATURE_OVERRIDES_H */
diff --git a/arch/mips/include/asm/module.h b/arch/mips/include/asm/module.h
index bc01a02..2278e34 100644
--- a/arch/mips/include/asm/module.h
+++ b/arch/mips/include/asm/module.h
@@ -120,6 +120,8 @@
#define MODULE_PROC_FAMILY "OCTEON "
#elif defined CONFIG_CPU_XLR
#define MODULE_PROC_FAMILY "XLR "
+#elif defined CONFIG_CPU_XLP
+#define MODULE_PROC_FAMILY "XLP "
#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 aa20382..92fae7f 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -192,6 +192,7 @@
case CPU_CAVIUM_OCTEON2:
case CPU_JZRISC:
case CPU_XLR:
+ case CPU_XLP:
cpu_wait = r4k_wait;
break;
@@ -1024,6 +1025,11 @@
MIPS_CPU_LLSC);
switch (c->processor_id & 0xff00) {
+ case PRID_IMP_NETLOGIC_XLP832:
+ c->cputype = CPU_XLP;
+ __cpu_name[cpu] = "Netlogic XLP";
+ break;
+
case PRID_IMP_NETLOGIC_XLR732:
case PRID_IMP_NETLOGIC_XLR716:
case PRID_IMP_NETLOGIC_XLR532:
@@ -1054,14 +1060,21 @@
break;
default:
- printk(KERN_INFO "Unknown Netlogic chip id [%02x]!\n",
+ pr_info("Unknown Netlogic chip id [%02x]!\n",
c->processor_id);
c->cputype = CPU_XLR;
break;
}
- c->isa_level = MIPS_CPU_ISA_M64R1;
- c->tlbsize = ((read_c0_config1() >> 25) & 0x3f) + 1;
+ if (c->cputype == CPU_XLP) {
+ c->isa_level = MIPS_CPU_ISA_M64R2;
+ c->options |= (MIPS_CPU_FPU | MIPS_CPU_ULRI | MIPS_CPU_MCHECK);
+ /* This will be updated again after all threads are woken up */
+ c->tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
+ } else {
+ c->isa_level = MIPS_CPU_ISA_M64R1;
+ c->tlbsize = ((read_c0_config1() >> 25) & 0x3f) + 1;
+ }
}
#ifdef CONFIG_64BIT
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index a79fe9a..4f9eb0b 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1235,6 +1235,9 @@
loongson2_sc_init();
return;
#endif
+ case CPU_XLP:
+ /* don't need to worry about L2, fully coherent */
+ return;
default:
if (c->isa_level == MIPS_CPU_ISA_M32R1 ||