[U-Boot] [PATCH v2 2/3] avr32: Use uncached() macro to get an address for SDRAM init

[Haavard Skinnemoen]

The paging system which is required to set up caching properties has not
yet been initialized when the SDRAM is initialized. So when the
map_physmem() function is converted to return the physical address
unchanged, the SDRAM initialization will break on some boards.

The avr32-specific uncached() macro will return an address which will
always cause uncached accessed to be made. Since this happens in the
board code, using avr32-specific features should be ok, and will allow
the SDRAM initialization to keep working.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen at atmel.com>
---
 board/atmel/atngw100/atngw100.c              |    4 +---
 board/atmel/atstk1000/atstk1000.c            |    4 +---
 board/earthlcd/favr-32-ezkit/favr-32-ezkit.c |    4 +---
 board/mimc/mimc200/mimc200.c                 |    4 +---
 board/miromico/hammerhead/hammerhead.c       |    4 +---
 5 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/board/atmel/atngw100/atngw100.c b/board/atmel/atngw100/atngw100.c
index 004d8da..4580f55 100644
--- a/board/atmel/atngw100/atngw100.c
+++ b/board/atmel/atngw100/atngw100.c
@@ -75,13 +75,11 @@ phys_size_t initdram(int board_type)
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 				actual_size >> 20, expected_size >> 20);
diff --git a/board/atmel/atstk1000/atstk1000.c b/board/atmel/atstk1000/atstk1000.c
index c36cb57..d91d594 100644
--- a/board/atmel/atstk1000/atstk1000.c
+++ b/board/atmel/atstk1000/atstk1000.c
@@ -97,13 +97,11 @@ phys_size_t initdram(int board_type)
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 				actual_size >> 20, expected_size >> 20);
diff --git a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
index 8af680f..d2843c9 100644
--- a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
+++ b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
@@ -68,13 +68,11 @@ phys_size_t initdram(int board_type)
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 				actual_size >> 20, expected_size >> 20);
diff --git a/board/mimc/mimc200/mimc200.c b/board/mimc/mimc200/mimc200.c
index cc0f137..9940669 100644
--- a/board/mimc/mimc200/mimc200.c
+++ b/board/mimc/mimc200/mimc200.c
@@ -153,13 +153,11 @@ phys_size_t initdram(int board_type)
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 				actual_size >> 20, expected_size >> 20);
diff --git a/board/miromico/hammerhead/hammerhead.c b/board/miromico/hammerhead/hammerhead.c
index 8b3e22c..5ab999e 100644
--- a/board/miromico/hammerhead/hammerhead.c
+++ b/board/miromico/hammerhead/hammerhead.c
@@ -80,13 +80,11 @@ phys_size_t initdram(int board_type)
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 		       actual_size >> 20, expected_size >> 20);
-- 
1.7.0.4