MIPS: Allow FTLB to be turned on for CPU_P5600

Allow FTLB to be turned on or off for CPU_P5600 as well as CPU_PROAPTIV.
The existing if statement is converted into a switch to allow for future
expansion.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6411/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 7 insertions, 5 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 0b9bbcb64afd..ee5de360636d 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -181,11 +181,12 @@ static char unknown_isa[] = KERN_ERR \
 static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
 {
         unsigned int config6;
-        /*
-         * Config6 is implementation dependent and it's currently only
-         * used by proAptiv
-         */
-        if (c->cputype == CPU_PROAPTIV) {
+
+        /* It's implementation dependent how the FTLB can be enabled */
+        switch (c->cputype) {
+        case CPU_PROAPTIV:
+        case CPU_P5600:
+                /* proAptiv & related cores use Config6 to enable the FTLB */
                 config6 = read_c0_config6();
                 if (enable)
                         /* Enable FTLB */
@@ -194,6 +195,7 @@ static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
                         /* Disable FTLB */
                         write_c0_config6(config6 &  ~MIPS_CONF6_FTLBEN);
                 back_to_back_c0_hazard();
+                break;
         }
 }