[PATCH 0/4] arm: mvebu: Fix usage of BIN header arguments

[PATCH 0/4] arm: mvebu: Fix usage of BIN header arguments

[Pali Rohár]

BIN header arguments are used only for aligning ARM executable code
to 128-bit boundary. This patch series document this behavior and fix
kwbimage and kwboot code to properly generate BIN headers.

Pali Rohár (4):
  tools: kwboot: Align UART baudrate change code in BIN header to
    128-bit boundary
  tools: kwbimage: Align BIN header executable code to 128-bit boundary
  arm: mvebu: Add documentation for save_boot_params() function
  arm: mvebu: Remove dummy BIN header arguments for SPL binary

 arch/arm/mach-mvebu/kwbimage.cfg.in |  2 +-
 arch/arm/mach-mvebu/lowlevel_spl.S  |  9 +++++
 tools/kwbimage.c                    | 51 +++++++++++++++++++----------
 tools/kwboot.c                      | 22 ++++++++++---
 4 files changed, 61 insertions(+), 23 deletions(-)

-- 
2.20.1

[PATCH 1/4] tools: kwboot: Align UART baudrate change code in BIN header to 128-bit boundary

[Pali Rohár]

ARM executable code inside the BIN header on some mvebu platforms
(e.g. A370, AXP) must always be aligned with the 128-bit boundary. This
requirement can be met by inserting dummy arguments into BIN header.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 tools/kwboot.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 6a1a030308e7..36d0cab29d1f 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -255,7 +255,7 @@ static unsigned char kwboot_baud_code[] = {
 };
 
 #define KWBOOT_BAUDRATE_BIN_HEADER_SZ (sizeof(kwboot_baud_code) + \
-				       sizeof(struct opt_hdr_v1) + 8)
+				       sizeof(struct opt_hdr_v1) + 8 + 16)
 
 static const char kwb_baud_magic[16] = "$baudratechange";
 
@@ -1328,11 +1328,10 @@ kwboot_add_bin_ohdr_v1(void *img, size_t *size, uint32_t binsz)
 {
 	struct main_hdr_v1 *hdr = img;
 	struct opt_hdr_v1 *ohdr;
+	uint32_t num_args;
+	uint32_t offset;
 	uint32_t ohdrsz;
 
-	ohdrsz = binsz + 8 + sizeof(*ohdr);
-	kwboot_img_grow_hdr(img, size, ohdrsz);
-
 	if (hdr->ext & 0x1) {
 		for_each_opt_hdr_v1 (ohdr, img)
 			if (opt_hdr_v1_next(ohdr) == NULL)
@@ -1345,13 +1344,26 @@ kwboot_add_bin_ohdr_v1(void *img, size_t *size, uint32_t binsz)
 		ohdr = (void *)(hdr + 1);
 	}
 
+	/*
+	 * ARM executable code inside the BIN header on some mvebu platforms
+	 * (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
+	 * This requirement can be met by inserting dummy arguments into
+	 * BIN header, if needed.
+	 */
+	offset = &ohdr->data[4] - (char *)img;
+	num_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
+
+	ohdrsz = sizeof(*ohdr) + 4 + 4 * num_args + binsz + 4;
+	kwboot_img_grow_hdr(hdr, size, ohdrsz);
+
 	ohdr->headertype = OPT_HDR_V1_BINARY_TYPE;
 	ohdr->headersz_msb = ohdrsz >> 16;
 	ohdr->headersz_lsb = cpu_to_le16(ohdrsz & 0xffff);
 
 	memset(&ohdr->data[0], 0, ohdrsz - sizeof(*ohdr));
+	*(uint32_t *)&ohdr->data[0] = cpu_to_le32(num_args);
 
-	return &ohdr->data[4];
+	return &ohdr->data[4 + 4 * num_args];
 }
 
 static void
-- 
2.20.1

[PATCH 2/4] tools: kwbimage: Align BIN header executable code to 128-bit boundary

[Pali Rohár]

ARM executable code inside the BIN header on some mvebu platforms
(e.g. A370, AXP) must always be aligned with the 128-bit boundary. This
requirement can be met by inserting dummy arguments into BIN header.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 tools/kwbimage.c | 51 ++++++++++++++++++++++++++++++++----------------
 1 file changed, 34 insertions(+), 17 deletions(-)

diff --git a/tools/kwbimage.c b/tools/kwbimage.c
index 77bf4dd8865e..abc88d01b9d8 100644
--- a/tools/kwbimage.c
+++ b/tools/kwbimage.c
@@ -932,6 +932,12 @@ static size_t image_headersz_v1(int *hasext)
 	 */
 	headersz = sizeof(struct main_hdr_v1);
 
+	if (image_get_csk_index() >= 0) {
+		headersz += sizeof(struct secure_hdr_v1);
+		if (hasext)
+			*hasext = 1;
+	}
+
 	count = image_count_options(IMAGE_CFG_DATA);
 	if (count > 0)
 		headersz += sizeof(struct register_set_hdr_v1) + 8 * count + 4;
@@ -963,15 +969,10 @@ static size_t image_headersz_v1(int *hasext)
 			return 0;
 		}
 
-		headersz += sizeof(struct opt_hdr_v1) +
-			ALIGN(s.st_size, 4) +
-			(binarye->binary.nargs + 2) * sizeof(uint32_t);
-		if (hasext)
-			*hasext = 1;
-	}
-
-	if (image_get_csk_index() >= 0) {
-		headersz += sizeof(struct secure_hdr_v1);
+		headersz += sizeof(struct opt_hdr_v1) + sizeof(uint32_t) +
+			(binarye->binary.nargs) * sizeof(uint32_t);
+		headersz = ALIGN(headersz, 16);
+		headersz += ALIGN(s.st_size, 4) + sizeof(uint32_t);
 		if (hasext)
 			*hasext = 1;
 	}
@@ -984,9 +985,12 @@ static size_t image_headersz_v1(int *hasext)
 }
 
 int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
-			 struct image_cfg_element *binarye)
+			 struct image_cfg_element *binarye,
+			 struct main_hdr_v1 *main_hdr)
 {
 	struct opt_hdr_v1 *hdr = (struct opt_hdr_v1 *)*cur;
+	uint32_t add_args;
+	uint32_t offset;
 	uint32_t *args;
 	size_t binhdrsz;
 	struct stat s;
@@ -1009,12 +1013,6 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
 		goto err_close;
 	}
 
-	binhdrsz = sizeof(struct opt_hdr_v1) +
-		(binarye->binary.nargs + 2) * sizeof(uint32_t) +
-		ALIGN(s.st_size, 4);
-	hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
-	hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
-
 	*cur += sizeof(struct opt_hdr_v1);
 
 	args = (uint32_t *)*cur;
@@ -1025,6 +1023,19 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
 
 	*cur += (binarye->binary.nargs + 1) * sizeof(uint32_t);
 
+	/*
+	 * ARM executable code inside the BIN header on some mvebu platforms
+	 * (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
+	 * This requirement can be met by inserting dummy arguments into
+	 * BIN header, if needed.
+	 */
+	offset = *cur - (uint8_t *)main_hdr;
+	add_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
+	if (add_args) {
+		*(args - 1) = cpu_to_le32(binarye->binary.nargs + add_args);
+		*cur += add_args * sizeof(uint32_t);
+	}
+
 	ret = fread(*cur, s.st_size, 1, bin);
 	if (ret != 1) {
 		fprintf(stderr,
@@ -1043,6 +1054,12 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
 
 	*cur += sizeof(uint32_t);
 
+	binhdrsz = sizeof(struct opt_hdr_v1) +
+		(binarye->binary.nargs + add_args + 2) * sizeof(uint32_t) +
+		ALIGN(s.st_size, 4);
+	hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
+	hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
+
 	return 0;
 
 err_close:
@@ -1299,7 +1316,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
 		if (e->type != IMAGE_CFG_BINARY)
 			continue;
 
-		if (add_binary_header_v1(&cur, &next_ext, e))
+		if (add_binary_header_v1(&cur, &next_ext, e, main_hdr))
 			return NULL;
 	}
 
-- 
2.20.1

[PATCH 3/4] arm: mvebu: Add documentation for save_boot_params() function

[Pali Rohár]

Important detail is availability of kwbimage BIN header arguments passed
via r0 and r1 registers by BootROM.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 arch/arm/mach-mvebu/lowlevel_spl.S | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/mach-mvebu/lowlevel_spl.S b/arch/arm/mach-mvebu/lowlevel_spl.S
index dde77b765214..39d42912c49f 100644
--- a/arch/arm/mach-mvebu/lowlevel_spl.S
+++ b/arch/arm/mach-mvebu/lowlevel_spl.S
@@ -3,6 +3,15 @@
 #include <config.h>
 #include <linux/linkage.h>
 
+/*
+ * BootROM loads the header part of kwbimage into L2 cache. BIN header usually
+ * contains U-Boot SPL, optionally it can also contain additional arguments.
+ * The number of these arguments is in r0, pointer to the argument array in r1.
+ * BootROM expects executable BIN header code to return to address stored in lr.
+ * Other registers (r2 - r12) must be preserved. We save all registers to
+ * CONFIG_SPL_BOOTROM_SAVE address. BIN header arguments (passed via r0 and r1)
+ * are currently not used by U-Boot SPL binary.
+ */
 ENTRY(save_boot_params)
 	stmfd	sp!, {r0 - r12, lr}	/* @ save registers on stack */
 	ldr	r12, =CONFIG_SPL_BOOTROM_SAVE
-- 
2.20.1

[PATCH 4/4] arm: mvebu: Remove dummy BIN header arguments for SPL binary

[Pali Rohár]

U-Boot SPL binary does not read BIN header arguments, so passing some dummy
values 0000005b and 00000068 has no effect for U-Boot SPL code.

Probably these two values comes from old Marvell DDR training code which
was separated from U-Boot and used it for some configuration.

Seems that two 32-bit values were specified here to ensure SPL code
alignment to 128-bit boundary as it is required e.g. for A370 or AXP
processors. Main kwbimage header is 64-byte long which is aligned to
128-bit boundary. Optional kwbheader is 32-bit long, number of BIN header
arguments is stored in 32-bit number. So for alignment to 128-bit boundary
is needed 64-bit padding which exactly these two 32-bit dummy arguments
provided.

Now when mkimage correctly aligns start of executable code in BIN header to
128-bit boundary, there is no requirement to put dummy argument values into
kwbimage. So remove them.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 arch/arm/mach-mvebu/kwbimage.cfg.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/kwbimage.cfg.in b/arch/arm/mach-mvebu/kwbimage.cfg.in
index 72e67d75c325..049d23c6ef08 100644
--- a/arch/arm/mach-mvebu/kwbimage.cfg.in
+++ b/arch/arm/mach-mvebu/kwbimage.cfg.in
@@ -9,4 +9,4 @@ VERSION		1
 #@BOOT_FROM
 
 # Binary Header (bin_hdr) with DDR3 training code
-BINARY spl/u-boot-spl.bin 0000005b 00000068
+BINARY spl/u-boot-spl.bin
-- 
2.20.1

Re: [PATCH 1/4] tools: kwboot: Align UART baudrate change code in BIN header to 128-bit boundary

[Stefan Roese]

On 21.10.21 16:46, Pali Rohár wrote:
> ARM executable code inside the BIN header on some mvebu platforms
> (e.g. A370, AXP) must always be aligned with the 128-bit boundary. This
> requirement can be met by inserting dummy arguments into BIN header.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

> ---
>   tools/kwboot.c | 22 +++++++++++++++++-----
>   1 file changed, 17 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/kwboot.c b/tools/kwboot.c
> index 6a1a030308e7..36d0cab29d1f 100644
> --- a/tools/kwboot.c
> +++ b/tools/kwboot.c
> @@ -255,7 +255,7 @@ static unsigned char kwboot_baud_code[] = {
>   };
>   
>   #define KWBOOT_BAUDRATE_BIN_HEADER_SZ (sizeof(kwboot_baud_code) + \
> -				       sizeof(struct opt_hdr_v1) + 8)
> +				       sizeof(struct opt_hdr_v1) + 8 + 16)
>   
>   static const char kwb_baud_magic[16] = "$baudratechange";
>   
> @@ -1328,11 +1328,10 @@ kwboot_add_bin_ohdr_v1(void *img, size_t *size, uint32_t binsz)
>   {
>   	struct main_hdr_v1 *hdr = img;
>   	struct opt_hdr_v1 *ohdr;
> +	uint32_t num_args;
> +	uint32_t offset;
>   	uint32_t ohdrsz;
>   
> -	ohdrsz = binsz + 8 + sizeof(*ohdr);
> -	kwboot_img_grow_hdr(img, size, ohdrsz);
> -
>   	if (hdr->ext & 0x1) {
>   		for_each_opt_hdr_v1 (ohdr, img)
>   			if (opt_hdr_v1_next(ohdr) == NULL)
> @@ -1345,13 +1344,26 @@ kwboot_add_bin_ohdr_v1(void *img, size_t *size, uint32_t binsz)
>   		ohdr = (void *)(hdr + 1);
>   	}
>   
> +	/*
> +	 * ARM executable code inside the BIN header on some mvebu platforms
> +	 * (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
> +	 * This requirement can be met by inserting dummy arguments into
> +	 * BIN header, if needed.
> +	 */
> +	offset = &ohdr->data[4] - (char *)img;
> +	num_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
> +
> +	ohdrsz = sizeof(*ohdr) + 4 + 4 * num_args + binsz + 4;
> +	kwboot_img_grow_hdr(hdr, size, ohdrsz);
> +
>   	ohdr->headertype = OPT_HDR_V1_BINARY_TYPE;
>   	ohdr->headersz_msb = ohdrsz >> 16;
>   	ohdr->headersz_lsb = cpu_to_le16(ohdrsz & 0xffff);
>   
>   	memset(&ohdr->data[0], 0, ohdrsz - sizeof(*ohdr));
> +	*(uint32_t *)&ohdr->data[0] = cpu_to_le32(num_args);
>   
> -	return &ohdr->data[4];
> +	return &ohdr->data[4 + 4 * num_args];
>   }
>   
>   static void
> 


Viele Grüße,
Stefan

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de

Re: [PATCH 2/4] tools: kwbimage: Align BIN header executable code to 128-bit boundary

[Stefan Roese]

On 21.10.21 16:46, Pali Rohár wrote:
> ARM executable code inside the BIN header on some mvebu platforms
> (e.g. A370, AXP) must always be aligned with the 128-bit boundary. This
> requirement can be met by inserting dummy arguments into BIN header.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

> ---
>   tools/kwbimage.c | 51 ++++++++++++++++++++++++++++++++----------------
>   1 file changed, 34 insertions(+), 17 deletions(-)
> 
> diff --git a/tools/kwbimage.c b/tools/kwbimage.c
> index 77bf4dd8865e..abc88d01b9d8 100644
> --- a/tools/kwbimage.c
> +++ b/tools/kwbimage.c
> @@ -932,6 +932,12 @@ static size_t image_headersz_v1(int *hasext)
>   	 */
>   	headersz = sizeof(struct main_hdr_v1);
>   
> +	if (image_get_csk_index() >= 0) {
> +		headersz += sizeof(struct secure_hdr_v1);
> +		if (hasext)
> +			*hasext = 1;
> +	}
> +
>   	count = image_count_options(IMAGE_CFG_DATA);
>   	if (count > 0)
>   		headersz += sizeof(struct register_set_hdr_v1) + 8 * count + 4;
> @@ -963,15 +969,10 @@ static size_t image_headersz_v1(int *hasext)
>   			return 0;
>   		}
>   
> -		headersz += sizeof(struct opt_hdr_v1) +
> -			ALIGN(s.st_size, 4) +
> -			(binarye->binary.nargs + 2) * sizeof(uint32_t);
> -		if (hasext)
> -			*hasext = 1;
> -	}
> -
> -	if (image_get_csk_index() >= 0) {
> -		headersz += sizeof(struct secure_hdr_v1);
> +		headersz += sizeof(struct opt_hdr_v1) + sizeof(uint32_t) +
> +			(binarye->binary.nargs) * sizeof(uint32_t);
> +		headersz = ALIGN(headersz, 16);
> +		headersz += ALIGN(s.st_size, 4) + sizeof(uint32_t);
>   		if (hasext)
>   			*hasext = 1;
>   	}
> @@ -984,9 +985,12 @@ static size_t image_headersz_v1(int *hasext)
>   }
>   
>   int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
> -			 struct image_cfg_element *binarye)
> +			 struct image_cfg_element *binarye,
> +			 struct main_hdr_v1 *main_hdr)
>   {
>   	struct opt_hdr_v1 *hdr = (struct opt_hdr_v1 *)*cur;
> +	uint32_t add_args;
> +	uint32_t offset;
>   	uint32_t *args;
>   	size_t binhdrsz;
>   	struct stat s;
> @@ -1009,12 +1013,6 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
>   		goto err_close;
>   	}
>   
> -	binhdrsz = sizeof(struct opt_hdr_v1) +
> -		(binarye->binary.nargs + 2) * sizeof(uint32_t) +
> -		ALIGN(s.st_size, 4);
> -	hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
> -	hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
> -
>   	*cur += sizeof(struct opt_hdr_v1);
>   
>   	args = (uint32_t *)*cur;
> @@ -1025,6 +1023,19 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
>   
>   	*cur += (binarye->binary.nargs + 1) * sizeof(uint32_t);
>   
> +	/*
> +	 * ARM executable code inside the BIN header on some mvebu platforms
> +	 * (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
> +	 * This requirement can be met by inserting dummy arguments into
> +	 * BIN header, if needed.
> +	 */
> +	offset = *cur - (uint8_t *)main_hdr;
> +	add_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
> +	if (add_args) {
> +		*(args - 1) = cpu_to_le32(binarye->binary.nargs + add_args);
> +		*cur += add_args * sizeof(uint32_t);
> +	}
> +
>   	ret = fread(*cur, s.st_size, 1, bin);
>   	if (ret != 1) {
>   		fprintf(stderr,
> @@ -1043,6 +1054,12 @@ int add_binary_header_v1(uint8_t **cur, uint8_t **next_ext,
>   
>   	*cur += sizeof(uint32_t);
>   
> +	binhdrsz = sizeof(struct opt_hdr_v1) +
> +		(binarye->binary.nargs + add_args + 2) * sizeof(uint32_t) +
> +		ALIGN(s.st_size, 4);
> +	hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
> +	hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;
> +
>   	return 0;
>   
>   err_close:
> @@ -1299,7 +1316,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
>   		if (e->type != IMAGE_CFG_BINARY)
>   			continue;
>   
> -		if (add_binary_header_v1(&cur, &next_ext, e))
> +		if (add_binary_header_v1(&cur, &next_ext, e, main_hdr))
>   			return NULL;
>   	}
>   
> 


Viele Grüße,
Stefan

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de

Re: [PATCH 3/4] arm: mvebu: Add documentation for save_boot_params() function

[Stefan Roese]

On 21.10.21 16:46, Pali Rohár wrote:
> Important detail is availability of kwbimage BIN header arguments passed
> via r0 and r1 registers by BootROM.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

> ---
>   arch/arm/mach-mvebu/lowlevel_spl.S | 9 +++++++++
>   1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm/mach-mvebu/lowlevel_spl.S b/arch/arm/mach-mvebu/lowlevel_spl.S
> index dde77b765214..39d42912c49f 100644
> --- a/arch/arm/mach-mvebu/lowlevel_spl.S
> +++ b/arch/arm/mach-mvebu/lowlevel_spl.S
> @@ -3,6 +3,15 @@
>   #include <config.h>
>   #include <linux/linkage.h>
>   
> +/*
> + * BootROM loads the header part of kwbimage into L2 cache. BIN header usually
> + * contains U-Boot SPL, optionally it can also contain additional arguments.
> + * The number of these arguments is in r0, pointer to the argument array in r1.
> + * BootROM expects executable BIN header code to return to address stored in lr.
> + * Other registers (r2 - r12) must be preserved. We save all registers to
> + * CONFIG_SPL_BOOTROM_SAVE address. BIN header arguments (passed via r0 and r1)
> + * are currently not used by U-Boot SPL binary.
> + */
>   ENTRY(save_boot_params)
>   	stmfd	sp!, {r0 - r12, lr}	/* @ save registers on stack */
>   	ldr	r12, =CONFIG_SPL_BOOTROM_SAVE
> 


Viele Grüße,
Stefan

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de

Re: [PATCH 4/4] arm: mvebu: Remove dummy BIN header arguments for SPL binary

[Stefan Roese]

On 21.10.21 16:46, Pali Rohár wrote:
> U-Boot SPL binary does not read BIN header arguments, so passing some dummy
> values 0000005b and 00000068 has no effect for U-Boot SPL code.
> 
> Probably these two values comes from old Marvell DDR training code which
> was separated from U-Boot and used it for some configuration.
> 
> Seems that two 32-bit values were specified here to ensure SPL code
> alignment to 128-bit boundary as it is required e.g. for A370 or AXP
> processors. Main kwbimage header is 64-byte long which is aligned to
> 128-bit boundary. Optional kwbheader is 32-bit long, number of BIN header
> arguments is stored in 32-bit number. So for alignment to 128-bit boundary
> is needed 64-bit padding which exactly these two 32-bit dummy arguments
> provided.
> 
> Now when mkimage correctly aligns start of executable code in BIN header to
> 128-bit boundary, there is no requirement to put dummy argument values into
> kwbimage. So remove them.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

> ---
>   arch/arm/mach-mvebu/kwbimage.cfg.in | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-mvebu/kwbimage.cfg.in b/arch/arm/mach-mvebu/kwbimage.cfg.in
> index 72e67d75c325..049d23c6ef08 100644
> --- a/arch/arm/mach-mvebu/kwbimage.cfg.in
> +++ b/arch/arm/mach-mvebu/kwbimage.cfg.in
> @@ -9,4 +9,4 @@ VERSION		1
>   #@BOOT_FROM
>   
>   # Binary Header (bin_hdr) with DDR3 training code
> -BINARY spl/u-boot-spl.bin 0000005b 00000068
> +BINARY spl/u-boot-spl.bin
> 


Viele Grüße,
Stefan

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Re: [PATCH 0/4] arm: mvebu: Fix usage of BIN header arguments

[Stefan Roese]

On 21.10.21 16:46, Pali Rohár wrote:
> BIN header arguments are used only for aligning ARM executable code
> to 128-bit boundary. This patch series document this behavior and fix
> kwbimage and kwboot code to properly generate BIN headers.
> 
> Pali Rohár (4):
>    tools: kwboot: Align UART baudrate change code in BIN header to
>      128-bit boundary
>    tools: kwbimage: Align BIN header executable code to 128-bit boundary
>    arm: mvebu: Add documentation for save_boot_params() function
>    arm: mvebu: Remove dummy BIN header arguments for SPL binary
> 
>   arch/arm/mach-mvebu/kwbimage.cfg.in |  2 +-
>   arch/arm/mach-mvebu/lowlevel_spl.S  |  9 +++++
>   tools/kwbimage.c                    | 51 +++++++++++++++++++----------
>   tools/kwboot.c                      | 22 ++++++++++---
>   4 files changed, 61 insertions(+), 23 deletions(-)
> 

Applied to u-boot-marvell/master

Thanks,
Stefan