MIPS: BMIPS: BMIPS4380 and BMIPS5000 support RIXI

Make BMIPS4380 and BMIPS5000 advertise support for RIXI through
cpu_probe_broadcom(). bmips_cpu_setup() needs to be called shortly after that,
during prom_init() in order to enable the proper Broadcom-specific register to
turn on RIXI and the "rotr" instruction.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jon.fraser@broadcom.com
Cc: pgynther@google.com
Cc: paul.burton@imgtec.com
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12507/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5562ee5..ac9bfad 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1832,6 +1832,7 @@ config CPU_BMIPS4380
        select MIPS_L1_CACHE_SHIFT_6
        select SYS_SUPPORTS_SMP
        select SYS_SUPPORTS_HOTPLUG_CPU
+       select CPU_HAS_RIXI
 
 config CPU_BMIPS5000
        bool
@@ -1839,6 +1840,7 @@ config CPU_BMIPS5000
        select MIPS_L1_CACHE_SHIFT_7
        select SYS_SUPPORTS_SMP
        select SYS_SUPPORTS_HOTPLUG_CPU
+       select CPU_HAS_RIXI
 
 config SYS_HAS_CPU_LOONGSON3
        bool

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 4bcbf00..46a2472 100644 (file)
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1468,6 +1468,7 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
                        c->cputype = CPU_BMIPS4380;
                        __cpu_name[cpu] = "Broadcom BMIPS4380";
                        set_elf_platform(cpu, "bmips4380");
+                       c->options |= MIPS_CPU_RIXI;
                } else {
                        c->cputype = CPU_BMIPS4350;
                        __cpu_name[cpu] = "Broadcom BMIPS4350";
@@ -1483,7 +1484,7 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
                else
                        __cpu_name[cpu] = "Broadcom BMIPS5000";
                set_elf_platform(cpu, "bmips5000");
-               c->options |= MIPS_CPU_ULRI;
+               c->options |= MIPS_CPU_ULRI | MIPS_CPU_RIXI;
                break;
        }
 }