From: Haojian Zhuang <haojian.zhuang@marvell.com>
Date: Wed, 30 Dec 2009 15:02:57 +0000 (-0500)
Subject: [ARM] pxa: enable L2 if present in XSC3
X-Git-Tag: firefly_0821_release~9833^2~3396^2~7^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=548c6af4627f4dcb24512a381193206e09bd6d31;p=firefly-linux-kernel-4.4.55.git

[ARM] pxa: enable L2 if present in XSC3

Check whether L2 is present or not in XSC3. If it's present, enable L2
immediately.

Disabling L2 after L2 is enabled that would result in unpredicatable behavior
of XSC3 processor.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
---

diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index 96456f548798..8e4f6dca8997 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -407,6 +407,13 @@ __xsc3_setup:
 
 	adr	r5, xsc3_crval
 	ldmia	r5, {r5, r6}
+
+#ifdef CONFIG_CACHE_XSC3L2
+	mrc	p15, 1, r0, c0, c0, 1		@ get L2 present information
+	ands	r0, r0, #0xf8
+	orrne	r6, r6, #(1 << 26)		@ enable L2 if present
+#endif
+
 	mrc	p15, 0, r0, c1, c0, 0		@ get control register
 	bic	r0, r0, r5			@ ..V. ..R. .... ..A.
 	orr	r0, r0, r6			@ ..VI Z..S .... .C.M (mmu)