[rtems commit] bsp/qoriq: Flush and invalidate all L2 caches

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    c287dc0f4642544f001ad192794df311d640a3a7
Changeset: http://git.rtems.org/rtems/commit/?id=c287dc0f4642544f001ad192794df311d640a3a7

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu Apr 21 12:37:25 2016 +0200

bsp/qoriq: Flush and invalidate all L2 caches

---

 c/src/lib/libbsp/powerpc/qoriq/Makefile.am       |  1 +
 c/src/lib/libbsp/powerpc/qoriq/configure.ac      | 14 ++++++--
 c/src/lib/libbsp/powerpc/qoriq/start/start.S     | 32 +++++++-----------
 c/src/lib/libbsp/powerpc/qoriq/startup/l2cache.S | 43 ++++++++++++++++++++++++
 4 files changed, 67 insertions(+), 23 deletions(-)

diff --git a/c/src/lib/libbsp/powerpc/qoriq/Makefile.am b/c/src/lib/libbsp/powerpc/qoriq/Makefile.am
index a564c2d..936f857 100644
--- a/c/src/lib/libbsp/powerpc/qoriq/Makefile.am
+++ b/c/src/lib/libbsp/powerpc/qoriq/Makefile.am
@@ -70,6 +70,7 @@ libbsp_a_SOURCES += \
 	../shared/startup/bspidle.c \
 	../shared/uboot_getenv.c \
 	../shared/uboot_dump_bdinfo.c \
+	startup/l2cache.S \
 	startup/mmu.c \
 	startup/mmu-tlb1.S \
 	startup/mmu-config.c \
diff --git a/c/src/lib/libbsp/powerpc/qoriq/configure.ac b/c/src/lib/libbsp/powerpc/qoriq/configure.ac
index 66f2605..a37c9cf 100644
--- a/c/src/lib/libbsp/powerpc/qoriq/configure.ac
+++ b/c/src/lib/libbsp/powerpc/qoriq/configure.ac
@@ -172,9 +172,17 @@ RTEMS_BSPOPTS_SET([QORIQ_HAS_HYPERVISOR_MODE],[qoriq_t*],[1])
 RTEMS_BSPOPTS_SET([QORIQ_HAS_HYPERVISOR_MODE],[*],[])
 RTEMS_BSPOPTS_HELP([QORIQ_HAS_HYPERVISOR_MODE],[defined if the processor core has a hypervisor mode])
 
-RTEMS_BSPOPTS_SET([QORIQ_L2CSR0],[qoriq_t*],[0xfec20000])
-RTEMS_BSPOPTS_SET([QORIQ_L2CSR0],[*],[])
-RTEMS_BSPOPTS_HELP([QORIQ_L2CSR0],[address of L2CSR0 register])
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_1_L2CSR0],[qoriq_t*],[0xfec20000])
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_1_L2CSR0],[*],[])
+RTEMS_BSPOPTS_HELP([QORIQ_CLUSTER_1_L2CSR0],[address of Cluster 1 L2CSR0 register])
+
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_2_L2CSR0],[qoriq_t4240*],[0xfec60000])
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_2_L2CSR0],[*],[])
+RTEMS_BSPOPTS_HELP([QORIQ_CLUSTER_2_L2CSR0],[address of Cluster 2 L2CSR0 register])
+
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_3_L2CSR0],[qoriq_t4240*],[0xfeca0000])
+RTEMS_BSPOPTS_SET([QORIQ_CLUSTER_3_L2CSR0],[*],[])
+RTEMS_BSPOPTS_HELP([QORIQ_CLUSTER_3_L2CSR0],[address of Cluster 3 L2CSR0 register])
 
 RTEMS_BSPOPTS_SET([QORIQ_CLOCK_TIMER],[qoriq_core_1],[4])
 RTEMS_BSPOPTS_SET([QORIQ_CLOCK_TIMER],[*],[0])
diff --git a/c/src/lib/libbsp/powerpc/qoriq/start/start.S b/c/src/lib/libbsp/powerpc/qoriq/start/start.S
index b0e4960..f9ac6a8 100644
--- a/c/src/lib/libbsp/powerpc/qoriq/start/start.S
+++ b/c/src/lib/libbsp/powerpc/qoriq/start/start.S
@@ -80,27 +80,19 @@ _start:
 	bne	1b
 	isync
 
-#ifdef QORIQ_L2CSR0
-	/* Flush L2 cache of first cluster */
-	LWI	r4, QORIQ_L2CSR0
-	lwz	r3, 0(r4)
-	oris	r3, r3, FSL_EIS_L2CSR0_L2FL >> 16
-	stw	r3, 0(r4)
-1:
-	lwz	r3, 0(r4)
-	andis.	r3, r3, FSL_EIS_L2CSR0_L2FL >> 16
-	bne	1b
-	isync
+#ifdef QORIQ_CLUSTER_1_L2CSR0
+	LWI	r3, QORIQ_CLUSTER_1_L2CSR0
+	bl	qoriq_l2cache_flush_invalidate
+#endif
 
-	/* Invalidate L2 cache of first cluster */
-	lwz	r3, 0(r4)
-	oris	r3, r3, FSL_EIS_L2CSR0_L2FI >> 16
-	stw	r3, 0(r4)
-1:
-	lwz	r3, 0(r4)
-	andis.	r3, r3, FSL_EIS_L2CSR0_L2FI >> 16
-	bne	1b
-	isync
+#ifdef QORIQ_CLUSTER_2_L2CSR0
+	LWI	r3, QORIQ_CLUSTER_2_L2CSR0
+	bl	qoriq_l2cache_flush_invalidate
+#endif
+
+#ifdef QORIQ_CLUSTER_3_L2CSR0
+	LWI	r3, QORIQ_CLUSTER_3_L2CSR0
+	bl	qoriq_l2cache_flush_invalidate
 #endif
 
 	/* Get start stack */
diff --git a/c/src/lib/libbsp/powerpc/qoriq/startup/l2cache.S b/c/src/lib/libbsp/powerpc/qoriq/startup/l2cache.S
new file mode 100644
index 0000000..1c57659
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/qoriq/startup/l2cache.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2015, 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems at embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <libcpu/powerpc-utility.h>
+
+	.global qoriq_l2cache_flush_invalidate
+
+	.section ".bsp_start_text", "ax"
+
+qoriq_l2cache_flush_invalidate:
+
+	/* Flush L2 cache */
+	lwz	r4, 0(r3)
+	oris	r4, r4, FSL_EIS_L2CSR0_L2FL >> 16
+	stw	r4, 0(r3)
+1:
+	lwz	r4, 0(r3)
+	andis.	r4, r4, FSL_EIS_L2CSR0_L2FL >> 16
+	bne	1b
+	isync
+
+	/* Invalidate L2 cache */
+	lwz	r4, 0(r3)
+	oris	r4, r4, FSL_EIS_L2CSR0_L2FI >> 16
+	stw	r4, 0(r3)
+1:
+	lwz	r4, 0(r3)
+	andis.	r4, r4, FSL_EIS_L2CSR0_L2FI >> 16
+	bne	1b
+	isync
+
+	blr