[PATCH v4 2/4] spl: fit: support for booting a LZMA-compressed U-boot binary

[Manoj Sai]

If LZMA Compression support is enabled, LZMA compressed U-Boot
binary will be placed at a specified RAM location which is
defined at CONFIG_SYS_LOAD_ADDR and will be assigned  as the
source address.

image_decomp() function, will decompress the LZMA compressed
U-Boot binary which is placed at source address(CONFIG_SYS_LOAD_ADDR)
to the default CONFIG_SYS_TEXT_BASE location.

spl_load_fit_image function will load the decompressed U-Boot
binary, which is placed at the CONFIG_SYS_TEXT_BASE location.

Signed-off-by: Manoj Sai <abbaraju.manojsai at amarulasolutions.com>
Signed-off-by: Suniel Mahesh <sunil at amarulasolutions.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
---
Changes in v4:
 - None

Changes in v3:
 - added IS_ENABLED(CONFIG_SPL_LZMA) to spl_decompression_enabled() function.
 - Removed extra parentheses.

Changes in v2:
 - New patch for v2

 common/spl/spl_fit.c | 13 ++++++++++++-
 include/spl.h        |  2 +-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c
index eb97259f57..75895ef15c 100644
--- a/common/spl/spl_fit.c
+++ b/common/spl/spl_fit.c
@@ -281,7 +281,8 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
 			return 0;
 		}
 
-		if (spl_decompression_enabled() && image_comp == IH_COMP_GZIP)
+		if (spl_decompression_enabled() &&
+		    (image_comp == IH_COMP_GZIP || image_comp == IH_COMP_LZMA))
 			src_ptr = map_sysmem(ALIGN(CONFIG_SYS_LOAD_ADDR, ARCH_DMA_MINALIGN), len);
 		else
 			src_ptr = map_sysmem(ALIGN(load_addr, ARCH_DMA_MINALIGN), len);
@@ -329,6 +330,16 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
 			return -EIO;
 		}
 		length = size;
+	} else if (IS_ENABLED(CONFIG_SPL_LZMA) && image_comp == IH_COMP_LZMA) {
+		size = CONFIG_SYS_BOOTM_LEN;
+		ulong loadEnd;
+
+		if (image_decomp(IH_COMP_LZMA, CONFIG_SYS_LOAD_ADDR, 0, 0,
+				 load_ptr, src, length, size, &loadEnd)) {
+			puts("Uncompressing error\n");
+			return -EIO;
+		}
+		length = loadEnd - CONFIG_SYS_LOAD_ADDR;
 	} else {
 		memcpy(load_ptr, src, length);
 	}
diff --git a/include/spl.h b/include/spl.h
index 3a7e448cc7..9de93a34cd 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -905,6 +905,6 @@ void spl_save_restore_data(void);
  */
 static inline bool spl_decompression_enabled(void)
 {
-	return IS_ENABLED(CONFIG_SPL_GZIP);
+	return IS_ENABLED(CONFIG_SPL_GZIP) || IS_ENABLED(CONFIG_SPL_LZMA);
 }
 #endif
-- 
2.25.1