[PATCH 2/2] MIPS: CPS: Copy EVA configuration when starting secondary VPs.

[Matt Redfearn]

When starting secondary VPEs which support EVA and the SegCtl registers,
copy the memory segmentation configuration from the running VPE to ensure
that all VPEs in the core have a consitent virtual memory map.

The EVA configuration of secondary cores is dealt with when starting the
core via the CM.

Signed-off-by: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
---

 arch/mips/kernel/cps-vec.S | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/mips/kernel/cps-vec.S b/arch/mips/kernel/cps-vec.S
index ac81edd44563..07b3274c8ae1 100644
--- a/arch/mips/kernel/cps-vec.S
+++ b/arch/mips/kernel/cps-vec.S
@@ -431,6 +431,22 @@ LEAF(mips_cps_boot_vpes)
 	mfc0	t0, CP0_CONFIG
 	mttc0	t0, CP0_CONFIG
 
+	/* Copy the EVA config from this VPE if the CPU supports it */
+	mfc0	t0, CP0_CONFIG, 1
+	bgez	t0, 1f
+	 mfc0	t0, CP0_CONFIG, 2
+	bgez	t0, 1f
+	 mfc0	t0, CP0_CONFIG, 3
+	and	t0, t0, MIPS_CONF3_SC
+	beqz	t0, 1f
+	 nop
+	mfc0    t0, CP0_SEGCTL0
+	mttc0	t0, CP0_SEGCTL0
+	mfc0    t0, CP0_SEGCTL1
+	mttc0	t0, CP0_SEGCTL1
+	mfc0    t0, CP0_SEGCTL2
+	mttc0	t0, CP0_SEGCTL2
+1:
 	/* Ensure no software interrupts are pending */
 	mttc0	zero, CP0_CAUSE
 	mttc0	zero, CP0_STATUS
-- 
2.5.0