[PATCH 05/12] Add compressed image support

[Sascha Hauer]

On Mon, Jul 30, 2012 at 12:02:38PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> From: Sascha Hauer <s.hauer at pengutronix.de>
> +
>  void barebox_pbl(uint32_t offset)
>  {
> +	uint32_t compressed_start, compressed_end, len;
> +	void (*uncompress)(void *compressed_start, unsigned int len);
> +
> +	compressed_start = (uint32_t)&input_data - offset;
> +	compressed_end = (uint32_t)&input_data_end - offset;
> +	len = compressed_end - compressed_start;
> +
> +	/*
> +	 * Check if the compressed binary will be overwritten
> +	 * by the uncompressed binary
> +	 */
> +	if (compressed_start >= TEXT_BASE &&
> +			compressed_start < TEXT_BASE + len * 4 ) {
> +		/*
> +		 * copy compressed binary to its link address
> +		 */
> +		memcpy(&input_data, (void *)compressed_start, len);
> +		compressed_start = (uint32_t)&input_data;
> +	}
> +
> +	uncompress = barebox_uncompress;
> +
> +	/* call barebox_uncompress with its absolute address */
> +	__asm__ __volatile__(
> +		"mov r0, %1\n"
> +		"mov r1, %2\n"
> +		"mov pc, %0\n"
> +		:
> +		: "r"(uncompress), "r"(compressed_start), "r"(len)
> +		: "r0", "r1");

When the pbl code runs at its correct address, then we can simply do a
barebox_uncompress() here.

Fixed this before applying.

Sascha


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