[U-Boot] [PATCH 1/3] cm4008: set gd->ram_size in dram_init

[U-Boot] [PATCH 1/3] cm4008: set gd->ram_size in dram_init

[Yann Vernier]

Leave dram_init_banksize to set up the bank info data.
ram_size was previously uninitialized.

Signed-off-by: Yann Vernier <yann.vernier@orsoc.se>
---
 board/cm4008/cm4008.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/board/cm4008/cm4008.c b/board/cm4008/cm4008.c
index ed493a8..557cd8e 100644
--- a/board/cm4008/cm4008.c
+++ b/board/cm4008/cm4008.c
@@ -97,8 +97,7 @@ int board_init (void)
 
 int dram_init (void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size  = PHYS_SDRAM_1_SIZE;
+	gd->ram_size  = PHYS_SDRAM_1_SIZE;
 
 	return (0);
 }
-- 
1.7.10

[U-Boot] [PATCH 1/3] cm4008: set gd->ram_size in dram_init

[Andreas Bießmann]

On 04.07.2012 15:08, Yann Vernier wrote:
> Leave dram_init_banksize to set up the bank info data.
> ram_size was previously uninitialized.
> 
> Signed-off-by: Yann Vernier <yann.vernier@orsoc.se>
> ---
>  board/cm4008/cm4008.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/board/cm4008/cm4008.c b/board/cm4008/cm4008.c
> index ed493a8..557cd8e 100644
> --- a/board/cm4008/cm4008.c
> +++ b/board/cm4008/cm4008.c
> @@ -97,8 +97,7 @@ int board_init (void)
>  
>  int dram_init (void)
>  {
> -	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
> -	gd->bd->bi_dram[0].size  = PHYS_SDRAM_1_SIZE;
> +	gd->ram_size  = PHYS_SDRAM_1_SIZE;
>  
>  	return (0);
>  }
> 

The dram_init should look like this nowadays:

---8<---
int dram_init (void)
{
        /* dram_init must store complete ramsize in gd->ram_size */
        gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
                        CONFIG_SYS_SDRAM_SIZE);
        return 0;
}
--->8---

PHYS_SDRAM_1_SIZE is also a remnant from older days, please switch to
CONFIG_SYS_SDRAM_SIZE. The get_ram_size() should check how many ram is
really accesable (think of a board which may have more options for RAM,
just insert the biggest possible option to CONFIG_SYS_SDRAM_SIZE).

Best regards

Andreas Bie?mann

[U-Boot] [PATCH v2] arm: cm4008, cm41xx: set gd->ram_size in dram_init

[Yann Vernier]

Leave dram_init_banksize to set up the bank info data.
ram_size was previously uninitialized. Also, generalize
lowlevel assembly to support more RAM options.

Signed-off-by: Yann Vernier <yann.vernier@orsoc.se>
---
Changes for v2:
   - Update to use CONFIG_SYS_SDRAM_ constants
   - Update cm41xx also
   - Map SDRAM to match configuration
---
 arch/arm/cpu/arm920t/ks8695/lowlevel_init.S |    8 +++-----
 board/cm4008/cm4008.c                       |    5 +++--
 board/cm41xx/cm41xx.c                       |    5 +++--
 include/configs/cm4008.h                    |    5 ++---
 include/configs/cm41xx.h                    |    5 ++---
 5 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S b/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
index e9f1227..df13de6 100644
--- a/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
+++ b/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
@@ -131,11 +131,9 @@ highflash:
 	 * before relocating, we have to setup RAM timing
 	 */
 	ldr	r1, =(KS8695_IO_BASE+KS8695_SDRAM_CTRL0)
-#if (PHYS_SDRAM_1_SIZE == 0x02000000)
-	ldr	r2, =0x7fc0000e		/* 32MB */
-#else
-	ldr	r2, =0x3fc0000e		/* 16MB */
-#endif
+	/* 8 column address bits, 4 banks, 32 bits data width */
+	ldr	r2, =((CONFIG_SYS_SDRAM_BASE+CONFIG_SYS_SDRAM_SIZE-0x10000)<<(22-16) | \
+		      (CONFIG_SYS_SDRAM_BASE>>(16-12) | 0x00e))
 	str	r2, [r1]		/* configure sdram bank0 setup */
 	ldr	r1, =(KS8695_IO_BASE+KS8695_SDRAM_CTRL1)
 	mov	r2, #0
diff --git a/board/cm4008/cm4008.c b/board/cm4008/cm4008.c
index ed493a8..6c0da9a 100644
--- a/board/cm4008/cm4008.c
+++ b/board/cm4008/cm4008.c
@@ -97,8 +97,9 @@ int board_init (void)
 
 int dram_init (void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size  = PHYS_SDRAM_1_SIZE;
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
+			CONFIG_SYS_SDRAM_SIZE);
 
 	return (0);
 }
diff --git a/board/cm41xx/cm41xx.c b/board/cm41xx/cm41xx.c
index d9dff4e..6aef617 100644
--- a/board/cm41xx/cm41xx.c
+++ b/board/cm41xx/cm41xx.c
@@ -97,8 +97,9 @@ int board_init (void)
 
 int dram_init (void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size  = PHYS_SDRAM_1_SIZE;
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
+			CONFIG_SYS_SDRAM_SIZE);
 
 	return (0);
 }
diff --git a/include/configs/cm4008.h b/include/configs/cm4008.h
index 408e918..58b0f4b 100644
--- a/include/configs/cm4008.h
+++ b/include/configs/cm4008.h
@@ -110,9 +110,8 @@
  * Physical Memory Map
  */
 #define CONFIG_NR_DRAM_BANKS	1	   /* we have 1 bank of DRAM */
-#define PHYS_SDRAM_1		0x00000000 /* SDRAM Bank #1 */
-#define PHYS_SDRAM_1_SIZE	0x01000000 /* 16 MB */
-#define CONFIG_SYS_SDRAM_BASE	PHYS_SDRAM_1
+#define CONFIG_SYS_SDRAM_BASE	0x00000000 /* SDRAM Bank #1 */
+#define CONFIG_SYS_SDRAM_SIZE	0x01000000 /* 16 MB */
 
 #define CONFIG_SYS_INIT_SP_ADDR	0x00020000 /* lowest 128k of RAM */
 
diff --git a/include/configs/cm41xx.h b/include/configs/cm41xx.h
index d85a600..d29040c 100644
--- a/include/configs/cm41xx.h
+++ b/include/configs/cm41xx.h
@@ -110,9 +110,8 @@
  * Physical Memory Map
  */
 #define CONFIG_NR_DRAM_BANKS	1	   /* we have 1 bank of DRAM */
-#define PHYS_SDRAM_1		0x00000000 /* SDRAM Bank #1 */
-#define PHYS_SDRAM_1_SIZE	0x02000000 /* 32 MB */
-#define CONFIG_SYS_SDRAM_BASE	PHYS_SDRAM_1
+#define CONFIG_SYS_SDRAM_BASE	0x00000000 /* SDRAM Bank #1 */
+#define CONFIG_SYS_SDRAM_SIZE	0x02000000 /* 32 MB */
 
 #define CONFIG_SYS_INIT_SP_ADDR	0x00020000 /* lowest 128k of RAM */
 
-- 
1.7.10

[U-Boot] [PATCH v2] arm: cm4008, cm41xx: set gd->ram_size in dram_init

[Andreas Bießmann]

On 05.07.2012 14:11, Yann Vernier wrote:
> Leave dram_init_banksize to set up the bank info data.
> ram_size was previously uninitialized. Also, generalize
> lowlevel assembly to support more RAM options.
> 
> Signed-off-by: Yann Vernier <yann.vernier@orsoc.se>
> ---
> Changes for v2:
>    - Update to use CONFIG_SYS_SDRAM_ constants
>    - Update cm41xx also
>    - Map SDRAM to match configuration
> ---
>  arch/arm/cpu/arm920t/ks8695/lowlevel_init.S |    8 +++-----
>  board/cm4008/cm4008.c                       |    5 +++--
>  board/cm41xx/cm41xx.c                       |    5 +++--
>  include/configs/cm4008.h                    |    5 ++---
>  include/configs/cm41xx.h                    |    5 ++---
>  5 files changed, 13 insertions(+), 15 deletions(-)
> 
> diff --git a/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S b/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
> index e9f1227..df13de6 100644
> --- a/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
> +++ b/arch/arm/cpu/arm920t/ks8695/lowlevel_init.S
> @@ -131,11 +131,9 @@ highflash:
>  	 * before relocating, we have to setup RAM timing
>  	 */
>  	ldr	r1, =(KS8695_IO_BASE+KS8695_SDRAM_CTRL0)
> -#if (PHYS_SDRAM_1_SIZE == 0x02000000)
> -	ldr	r2, =0x7fc0000e		/* 32MB */
> -#else
> -	ldr	r2, =0x3fc0000e		/* 16MB */
> -#endif
> +	/* 8 column address bits, 4 banks, 32 bits data width */
> +	ldr	r2, =((CONFIG_SYS_SDRAM_BASE+CONFIG_SYS_SDRAM_SIZE-0x10000)<<(22-16) | \
> +		      (CONFIG_SYS_SDRAM_BASE>>(16-12) | 0x00e))

ugh ... magic. Will it work for every possible setting?
How about one setting CONFIG_SYS_SDRAM_BASE != 0x0? I the base address
related to register content in any way?

Would be great to have a little documentation here why it is shifted
that way, unfortunately I can not find a KS8695 spec in the net. Don't
get me wrong it is ok to do so. I think it is way better than hard
coding the values like before but would be great to understand why it is
done that way.

Best regards

Andreas Bie?mann