[U-Boot] [PATCH] part_mac: dcache: allocate cacheline-aligned buffers

["Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>]

On Fri, Jul 13, 2012 at 09:31:03 PM, Beno?t Th?baudeau wrote:
> This patch forces the correct alignment for DMA operations of buffers
> used by
> part_mac.c.
> 
> Signed-off-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
> Cc: Wolfgang Denk <wd@denx.de>
> ---
>  {u-boot.orig => u-boot}/disk/part_mac.c |   68
>  +++++++++++++++----------------
>  1 file changed, 34 insertions(+), 34 deletions(-)
> 
> diff --git u-boot.orig/disk/part_mac.c u-boot/disk/part_mac.c
> index c1afc8c..cb443ac 100644
> --- u-boot.orig/disk/part_mac.c
> +++ u-boot/disk/part_mac.c
> @@ -60,23 +60,23 @@ static int part_mac_read_pdb (block_dev_desc_t
> *dev_desc, int part, mac_partitio
>   */
>  int test_part_mac (block_dev_desc_t *dev_desc)
>  {
> -	mac_driver_desc_t	ddesc;
> -	mac_partition_t		mpart;
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
>  	ulong i, n;
>  
> -	if (part_mac_read_ddb (dev_desc, &ddesc)) {
> +	if (part_mac_read_ddb (dev_desc, ddesc)) {
>  		/* error reading Driver Desriptor Block, or no valid Signature */
>  		return (-1);
>  	}
>  
>  	n = 1;	/* assuming at least one partition */
>  	for (i=1; i<=n; ++i) {
> -		if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) !=
> 1) ||
> -		    (mpart.signature != MAC_PARTITION_MAGIC) ) {
> +		if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)mpart) !=
> 1) ||
> +		    (mpart->signature != MAC_PARTITION_MAGIC) ) {
>  			return (-1);
>  		}
>  		/* update partition count */
> -		n = mpart.map_count;
> +		n = mpart->map_count;
>  	}
>  	return (0);
>  }
> @@ -85,20 +85,20 @@ int test_part_mac (block_dev_desc_t *dev_desc)
>  void print_part_mac (block_dev_desc_t *dev_desc)
>  {
>  	ulong i, n;
> -	mac_driver_desc_t	ddesc;
> -	mac_partition_t		mpart;
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
>  	ldiv_t mb, gb;
>  
> -	if (part_mac_read_ddb (dev_desc, &ddesc)) {
> +	if (part_mac_read_ddb (dev_desc, ddesc)) {
>  		/* error reading Driver Desriptor Block, or no valid Signature */
>  		return;
>  	}
>  
> -	n  = ddesc.blk_count;
> +	n  = ddesc->blk_count;
>  
> -	mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */
> +	mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
>  	/* round to 1 digit */
> -	mb.rem *= 10 * ddesc.blk_size;
> +	mb.rem *= 10 * ddesc->blk_size;
>  	mb.rem += 512 * 1024;
>  	mb.rem /= 1024 * 1024;
>  
> @@ -112,10 +112,10 @@ void print_part_mac (block_dev_desc_t
> *dev_desc)
>  		"DeviceType=0x%x, DeviceId=0x%x\n\n"
>  		"   #:                 type name"
>  		"                   length   base       (size)\n",
> -		ddesc.blk_size,
> -		ddesc.blk_count,
> +		ddesc->blk_size,
> +		ddesc->blk_count,
>  		mb.quot, mb.rem, gb.quot, gb.rem,
> -		ddesc.dev_type, ddesc.dev_id
> +		ddesc->dev_type, ddesc->dev_id
>  		);
>  
>  	n = 1;	/* assuming at least one partition */
> @@ -124,25 +124,25 @@ void print_part_mac (block_dev_desc_t
> *dev_desc)
>  		char c;
>  
>  		printf ("%4ld: ", i);
> -		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) !=
> 1) {
> +		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)mpart) !=
> 1) {
>  			printf ("** Can't read Partition Map on %d:%ld **\n",
>  				dev_desc->dev, i);
>  			return;
>  		}
>  
> -		if (mpart.signature != MAC_PARTITION_MAGIC) {
> +		if (mpart->signature != MAC_PARTITION_MAGIC) {
>  			printf ("** Bad Signature on %d:%ld - "
>  				"expected 0x%04x, got 0x%04x\n",
> -				dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature);
> +				dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature);
>  			return;
>  		}
>  
>  		/* update partition count */
> -		n = mpart.map_count;
> +		n = mpart->map_count;
>  
>  		c      = 'k';
> -		bytes  = mpart.block_count;
> -		bytes /= (1024 / ddesc.blk_size);  /* kB; assumes blk_size == 512
> */
> +		bytes  = mpart->block_count;
> +		bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512
> */
>  		if (bytes >= 1024) {
>  			bytes >>= 10;
>  			c = 'M';
> @@ -153,10 +153,10 @@ void print_part_mac (block_dev_desc_t
> *dev_desc)
>  		}
>  
>  		printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
> -			mpart.type,
> -			mpart.name,
> -			mpart.block_count,
> -			mpart.start_block,
> +			mpart->type,
> +			mpart->name,
> +			mpart->block_count,
> +			mpart->start_block,
>  			bytes, c
>  			);
>  	}
> @@ -231,23 +231,23 @@ static int part_mac_read_pdb (block_dev_desc_t
> *dev_desc, int part, mac_partitio
>  
>  int get_partition_info_mac (block_dev_desc_t *dev_desc, int part,
>  disk_partition_t *info)
>  {
> -	mac_driver_desc_t	ddesc;
> -	mac_partition_t		mpart;
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
> +	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
>  
> -	if (part_mac_read_ddb (dev_desc, &ddesc)) {
> +	if (part_mac_read_ddb (dev_desc, ddesc)) {
>  		return (-1);
>  	}
>  
> -	info->blksz = ddesc.blk_size;
> +	info->blksz = ddesc->blk_size;
>  
> -	if (part_mac_read_pdb (dev_desc, part, &mpart)) {
> +	if (part_mac_read_pdb (dev_desc, part, mpart)) {
>  		return (-1);
>  	}
>  
> -	info->start = mpart.start_block;
> -	info->size  = mpart.block_count;
> -	memcpy (info->type, mpart.type, sizeof(info->type));
> -	memcpy (info->name, mpart.name, sizeof(info->name));
> +	info->start = mpart->start_block;
> +	info->size  = mpart->block_count;
> +	memcpy (info->type, mpart->type, sizeof(info->type));
> +	memcpy (info->name, mpart->name, sizeof(info->name));
>  
>  	return (0);
>  }
> 

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Beno?t