[PATCH v2 4/4] 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>
---
 common/spl/spl_fit.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c
index d728ac71fc..208d2f761e 100644
--- a/common/spl/spl_fit.c
+++ b/common/spl/spl_fit.c
@@ -246,7 +246,7 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
 			debug("%s ", genimg_get_type_name(type));
 	}
 
-	if (IS_ENABLED(CONFIG_SPL_GZIP)) {
+	if (IS_ENABLED(CONFIG_SPL_GZIP) || IS_ENABLED(CONFIG_SPL_LZMA)) {
 		fit_image_get_comp(fit, node, &image_comp);
 		debug("%s ", genimg_get_comp_name(image_comp));
 	}
@@ -280,8 +280,8 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
 				    __func__, fit_get_name(fit, node, NULL));
 			return 0;
 		}
-
-		if ((IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP))
+		if ((IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) ||
+		    (IS_ENABLED(CONFIG_SPL_LZMA) && 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 +329,16 @@ 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);
 	}
-- 
2.25.1