ARM: Add basic Layerscape support

This adds basic Layerscape support:

- Makefile/Kconfig
- Register maps
- errata workarounds

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/mach-layerscape/lowlevel.S b/arch/arm/mach-layerscape/lowlevel.S
new file mode 100644
index 0000000000..adb3e54367
--- /dev/null
+++ b/arch/arm/mach-layerscape/lowlevel.S
@@ -0,0 +1,18 @@
+#include <linux/linkage.h>
+
+.section .text.ls1046a_init_l2_latency
+ENTRY(ls1046a_init_l2_latency)
+	/* Initialize the L2 RAM latency */
+	mrs   x1, S3_1_c11_c0_2
+	mov   x0, #0x1C7
+	/* Clear L2 Tag RAM latency and L2 Data RAM latency */
+	bic   x1, x1, x0
+	/* Set L2 data ram latency bits [2:0] */
+	orr   x1, x1, #0x2
+	/* set L2 tag ram latency bits [8:6] */
+	orr   x1,  x1, #0x80
+	msr   S3_1_c11_c0_2, x1
+	isb
+
+	ret
+ENDPROC(ls1046a_init_l2_latency);