[U-Boot] [PATCH 4/4] arm: mx5: Avoid hardcoding memory sizes on M53EVK

[Marek Vasut <marex@denx.de>]

The DRAM size can be easily detected at runtime on i.MX53. Implement
such detection on M53EVK and adjust the rest of the macros accordingly
to use the detected values.

An important thing to note here is that we had to override the function
for trimming the effective DRAM address, get_effective_memsize(). That
is because the function uses CONFIG_MAX_MEM_MAPPED as the upper bound of
the available DRAM and we don't have gd->bd->bi_dram[0].size set up at
the time the function is called, thus we cannot put this into the macro
CONFIG_MAX_MEM_MAPPED . Instead, we use custom override where we use the
size of the first DRAM block which we just detected.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
---
 board/denx/m53evk/m53evk.c | 21 ++++++++++++++-------
 include/configs/m53evk.h   |  6 +++---
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/board/denx/m53evk/m53evk.c b/board/denx/m53evk/m53evk.c
index 0f71a16..de0bdb6 100644
--- a/board/denx/m53evk/m53evk.c
+++ b/board/denx/m53evk/m53evk.c
@@ -16,6 +16,7 @@
 #include <asm/imx-common/mx5_video.h>
 #include <asm/arch/spl.h>
 #include <asm/errno.h>
+#include <asm/sizes.h>
 #include <netdev.h>
 #include <i2c.h>
 #include <mmc.h>
@@ -31,24 +32,30 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-int dram_init(void)
+static uint32_t mx53_dram_size[2];
+
+phys_size_t get_effective_memsize(void)
 {
-	u32 size1, size2;
+	return mx53_dram_size[0];
+}
 
-	size1 = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
-	size2 = get_ram_size((void *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
+int dram_init(void)
+{
+	mx53_dram_size[0] = get_ram_size((void *)PHYS_SDRAM_1, SZ_1G);
+	mx53_dram_size[1] = get_ram_size((void *)PHYS_SDRAM_2, SZ_1G);
 
-	gd->ram_size = size1 + size2;
+	gd->ram_size = mx53_dram_size[0] + mx53_dram_size[1];
 
 	return 0;
 }
+
 void dram_init_banksize(void)
 {
 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+	gd->bd->bi_dram[0].size = mx53_dram_size[0];
 
 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
-	gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
+	gd->bd->bi_dram[1].size = mx53_dram_size[1];
 }
 
 static void setup_iomux_uart(void)
diff --git a/include/configs/m53evk.h b/include/configs/m53evk.h
index 6f8872e..d4d0567 100644
--- a/include/configs/m53evk.h
+++ b/include/configs/m53evk.h
@@ -46,10 +46,10 @@
  */
 #define CONFIG_NR_DRAM_BANKS		2
 #define PHYS_SDRAM_1			CSD0_BASE_ADDR
-#define PHYS_SDRAM_1_SIZE		(512 * 1024 * 1024)
+#define PHYS_SDRAM_1_SIZE		(gd->bd->bi_dram[0].size)
 #define PHYS_SDRAM_2			CSD1_BASE_ADDR
-#define PHYS_SDRAM_2_SIZE		(512 * 1024 * 1024)
-#define PHYS_SDRAM_SIZE			(PHYS_SDRAM_1_SIZE + PHYS_SDRAM_2_SIZE)
+#define PHYS_SDRAM_2_SIZE		(gd->bd->bi_dram[1].size)
+#define PHYS_SDRAM_SIZE			(gd->ram_size)
 #define CONFIG_SYS_MALLOC_LEN		(10 * 1024 * 1024)
 #define CONFIG_SYS_MEMTEST_START	0x70000000
 #define CONFIG_SYS_MEMTEST_END		0x8ff00000
-- 
1.9.0