[U-Boot] [RFC] powerpc: add 2 common dcache assembly functions

Valentin Longchamp valentin.longchamp at keymile.com
Fri Mar 27 16:07:32 CET 2015 

This patch defines the 2 flush_dcache_range and invalidate_dcache_range
functions for all the powerpc architecture. Their implementation is
borrowed from the kernel's misc_32.S file and replace the ones from
mpc86xx and ppc4xx since they were equivalent.

This is a fix for the problem introduced by this patch:
http://patchwork.ozlabs.org/patch/448849/

Signed-off-by: Valentin Longchamp <valentin.longchamp at keymile.com>
---
 arch/powerpc/cpu/mpc512x/Makefile |  3 ---
 arch/powerpc/cpu/mpc512x/cache.c  | 17 --------------
 arch/powerpc/cpu/mpc5xxx/Makefile |  1 -
 arch/powerpc/cpu/mpc5xxx/cache.c  | 15 ------------
 arch/powerpc/cpu/mpc83xx/Makefile |  3 ---
 arch/powerpc/cpu/mpc83xx/cache.c  | 17 --------------
 arch/powerpc/cpu/mpc85xx/Makefile |  3 ---
 arch/powerpc/cpu/mpc85xx/cache.c  | 17 --------------
 arch/powerpc/cpu/mpc86xx/cache.S  | 45 ------------------------------------
 arch/powerpc/cpu/ppc4xx/cache.S   | 43 -----------------------------------
 arch/powerpc/lib/ppccache.S       | 48 +++++++++++++++++++++++++++++++++++++++
 11 files changed, 48 insertions(+), 164 deletions(-)
 delete mode 100644 arch/powerpc/cpu/mpc512x/cache.c
 delete mode 100644 arch/powerpc/cpu/mpc5xxx/cache.c
 delete mode 100644 arch/powerpc/cpu/mpc83xx/cache.c
 delete mode 100644 arch/powerpc/cpu/mpc85xx/cache.c

diff --git a/arch/powerpc/cpu/mpc512x/Makefile b/arch/powerpc/cpu/mpc512x/Makefile
index a4934ef..98991c6 100644
--- a/arch/powerpc/cpu/mpc512x/Makefile
+++ b/arch/powerpc/cpu/mpc512x/Makefile
@@ -17,6 +17,3 @@ obj-y += speed.o
 obj-$(CONFIG_FSL_DIU_FB) += diu.o
 obj-$(CONFIG_CMD_IDE) += ide.o
 obj-$(CONFIG_PCI) += pci.o
-
-# Stub implementations of cache management functions for USB
-obj-$(CONFIG_USB_EHCI) += cache.o
diff --git a/arch/powerpc/cpu/mpc512x/cache.c b/arch/powerpc/cpu/mpc512x/cache.c
deleted file mode 100644
index 66384f9..0000000
--- a/arch/powerpc/cpu/mpc512x/cache.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (C) 2012 Marek Vasut <marex at denx.de>
- *
- * This file contains stub implementation of
- *   invalidate_dcache_range()
- *   flush_dcache_range()
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
diff --git a/arch/powerpc/cpu/mpc5xxx/Makefile b/arch/powerpc/cpu/mpc5xxx/Makefile
index d122b29..5c67e1d 100644
--- a/arch/powerpc/cpu/mpc5xxx/Makefile
+++ b/arch/powerpc/cpu/mpc5xxx/Makefile
@@ -7,7 +7,6 @@
 
 extra-y	= start.o
 extra-y += traps.o
-obj-y  += cache.o
 obj-y  += io.o
 obj-y  += firmware_sc_task_bestcomm.impl.o
 obj-y += i2c.o
diff --git a/arch/powerpc/cpu/mpc5xxx/cache.c b/arch/powerpc/cpu/mpc5xxx/cache.c
deleted file mode 100644
index 5d674bc..0000000
--- a/arch/powerpc/cpu/mpc5xxx/cache.c
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * This file contains stub implementation of
- *   invalidate_dcache_range()
- *   flush_dcache_range()
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
diff --git a/arch/powerpc/cpu/mpc83xx/Makefile b/arch/powerpc/cpu/mpc83xx/Makefile
index cf91162..a93cf13 100644
--- a/arch/powerpc/cpu/mpc83xx/Makefile
+++ b/arch/powerpc/cpu/mpc83xx/Makefile
@@ -35,9 +35,6 @@ obj-$(CONFIG_PCI) += pci.o
 obj-$(CONFIG_PCIE) += pcie.o
 obj-$(CONFIG_OF_LIBFDT) += fdt.o
 
-# Stub implementations of cache management functions for USB
-obj-y += cache.o
-
 ifndef CONFIG_SYS_FSL_DDRC_GEN2
 obj-y += spd_sdram.o
 endif
diff --git a/arch/powerpc/cpu/mpc83xx/cache.c b/arch/powerpc/cpu/mpc83xx/cache.c
deleted file mode 100644
index 66384f9..0000000
--- a/arch/powerpc/cpu/mpc83xx/cache.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (C) 2012 Marek Vasut <marex at denx.de>
- *
- * This file contains stub implementation of
- *   invalidate_dcache_range()
- *   flush_dcache_range()
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
diff --git a/arch/powerpc/cpu/mpc85xx/Makefile b/arch/powerpc/cpu/mpc85xx/Makefile
index b93158b..65c26c0 100644
--- a/arch/powerpc/cpu/mpc85xx/Makefile
+++ b/arch/powerpc/cpu/mpc85xx/Makefile
@@ -114,7 +114,4 @@ endif
 obj-y	+= tlb.o
 obj-y	+= traps.o
 
-# Stub implementations of cache management functions for USB
-obj-y += cache.o
-
 endif # not minimal
diff --git a/arch/powerpc/cpu/mpc85xx/cache.c b/arch/powerpc/cpu/mpc85xx/cache.c
deleted file mode 100644
index 66384f9..0000000
--- a/arch/powerpc/cpu/mpc85xx/cache.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (C) 2012 Marek Vasut <marex at denx.de>
- *
- * This file contains stub implementation of
- *   invalidate_dcache_range()
- *   flush_dcache_range()
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
diff --git a/arch/powerpc/cpu/mpc86xx/cache.S b/arch/powerpc/cpu/mpc86xx/cache.S
index 536d9b9..34968c6 100644
--- a/arch/powerpc/cpu/mpc86xx/cache.S
+++ b/arch/powerpc/cpu/mpc86xx/cache.S
@@ -115,51 +115,6 @@ _GLOBAL(clean_dcache_range)
 	blr
 
 /*
- * Write any modified data cache blocks out to memory
- * and invalidate the corresponding instruction cache blocks.
- *
- * flush_dcache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(flush_dcache_range)
-	li	r5,CACHE_LINE_SIZE-1
-	andc	r3,r3,r5
-	subf	r4,r3,r4
-	add	r4,r4,r5
-	srwi.	r4,r4,LG_CACHE_LINE_SIZE
-	beqlr
-	mtctr	r4
-
-	sync
-1:	dcbf	0,r3
-	addi	r3,r3,CACHE_LINE_SIZE
-	bdnz	1b
-	sync				/* wait for dcbf's to get to ram */
-	blr
-
-/*
- * Like above, but invalidate the D-cache.  This is used by the 8xx
- * to invalidate the cache so the PPC core doesn't get stale data
- * from the CPM (no cache snooping here :-).
- *
- * invalidate_dcache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(invalidate_dcache_range)
-	li	r5,CACHE_LINE_SIZE-1
-	andc	r3,r3,r5
-	subf	r4,r3,r4
-	add	r4,r4,r5
-	srwi.	r4,r4,LG_CACHE_LINE_SIZE
-	beqlr
-	mtctr	r4
-
-	sync
-1:	dcbi	0,r3
-	addi	r3,r3,CACHE_LINE_SIZE
-	bdnz	1b
-	sync				/* wait for dcbi's to get to ram */
-	blr
-
-/*
  * Flush a particular page from the data cache to RAM.
  * Note: this is necessary because the instruction cache does *not*
  * snoop from the data cache.
diff --git a/arch/powerpc/cpu/ppc4xx/cache.S b/arch/powerpc/cpu/ppc4xx/cache.S
index 2714c2f..93e8366 100644
--- a/arch/powerpc/cpu/ppc4xx/cache.S
+++ b/arch/powerpc/cpu/ppc4xx/cache.S
@@ -74,49 +74,6 @@ _GLOBAL(clean_dcache_range)
 	blr
 
 /*
- * Write any modified data cache blocks out to memory and invalidate them.
- * Does not invalidate the corresponding instruction cache blocks.
- *
- * flush_dcache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(flush_dcache_range)
-	li	r5,L1_CACHE_BYTES-1
-	andc	r3,r3,r5
-	subf	r4,r3,r4
-	add	r4,r4,r5
-	srwi.	r4,r4,L1_CACHE_SHIFT
-	beqlr
-	mtctr	r4
-
-1:	dcbf	0,r3
-	addi	r3,r3,L1_CACHE_BYTES
-	bdnz	1b
-	sync				/* wait for dcbst's to get to ram */
-	blr
-
-/*
- * Like above, but invalidate the D-cache.  This is used by the 8xx
- * to invalidate the cache so the PPC core doesn't get stale data
- * from the CPM (no cache snooping here :-).
- *
- * invalidate_dcache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(invalidate_dcache_range)
-	li	r5,L1_CACHE_BYTES-1
-	andc	r3,r3,r5
-	subf	r4,r3,r4
-	add	r4,r4,r5
-	srwi.	r4,r4,L1_CACHE_SHIFT
-	beqlr
-	mtctr	r4
-
-1:	dcbi	0,r3
-	addi	r3,r3,L1_CACHE_BYTES
-	bdnz	1b
-	sync				/* wait for dcbi's to get to ram */
-	blr
-
-/*
  * 40x cores have 8K or 16K dcache and 32 byte line size.
  * 44x has a 32K dcache and 32 byte line size.
  * 8xx has 1, 2, 4, 8K variants.
diff --git a/arch/powerpc/lib/ppccache.S b/arch/powerpc/lib/ppccache.S
index 349a1c1..b96dbc6 100644
--- a/arch/powerpc/lib/ppccache.S
+++ b/arch/powerpc/lib/ppccache.S
@@ -9,6 +9,9 @@
 
 #include <config.h>
 #include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
 
 /*------------------------------------------------------------------------------- */
 /* Function:	 ppcDcbf */
@@ -54,3 +57,48 @@ ppcDcbz:
 ppcSync:
 	sync
 	blr
+
+/*
+ * Write any modified data cache blocks out to memory and invalidate them.
+ * Does not invalidate the corresponding instruction cache blocks.
+ *
+ * flush_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(flush_dcache_range)
+	li	r5,L1_CACHE_BYTES-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,L1_CACHE_SHIFT
+	beqlr
+	mtctr	r4
+
+1:	dcbf	0,r3
+	addi	r3,r3,L1_CACHE_BYTES
+	bdnz	1b
+	sync				/* wait for dcbst's to get to ram */
+	blr
+
+/*
+ * Like above, but invalidate the D-cache.  This is used by the 8xx
+ * to invalidate the cache so the PPC core doesn't get stale data
+ * from the CPM (no cache snooping here :-).
+ *
+ * invalidate_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(invalidate_dcache_range)
+	li	r5,L1_CACHE_BYTES-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,L1_CACHE_SHIFT
+	beqlr
+	mtctr	r4
+
+	sync
+1:	dcbi	0,r3
+	addi	r3,r3,L1_CACHE_BYTES
+	bdnz	1b
+	sync				/* wait for dcbi's to get to ram */
+	blr
+
-- 
1.8.0.1

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