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-rw-r--r--doc/README.ublimage22
1 files changed, 11 insertions, 11 deletions
diff --git a/doc/README.ublimage b/doc/README.ublimage
index add24d649..ab25b2615 100644
--- a/doc/README.ublimage
+++ b/doc/README.ublimage
@@ -101,22 +101,22 @@ This steps are done automagically if you do a "make all"
Structure of this binary (Example for the cam_enc_4xx board with a NAND
page size = 0x800):
-offset : 0x00000 | 0x800 | 0x3800
-content: UBL | nand_spl | u-boot code
- Header | code |
+offset : 0x00000 | 0x800 | 0x3800
+content: UBL | nand_spl | u-boot code
+ Header | code |
The NAND layout looks for example like this:
(Example for the cam_enc_4xx board with a NAND page size = 0x800, block
size = 0x20000 and CONFIG_SYS_NROF_UBL_HEADER 5):
-offset : 0x80000 | 0xa0000 | 0xa3000
-content: UBL | nand_spl | u-boot code
- Header | code |
- ^ ^
- ^ 0xa0000 = CONFIG_SYS_NROF_UBL_HEADER * 0x20000
- ^
- 0x80000 = Block 4 * 0x20000
+offset : 0x80000 | 0xa0000 | 0xa3000
+content: UBL | nand_spl | u-boot code
+ Header | code |
+ ^ ^
+ ^ 0xa0000 = CONFIG_SYS_NROF_UBL_HEADER * 0x20000
+ ^
+ 0x80000 = Block 4 * 0x20000
If the cpu starts in NAND boot mode, it checks the UBL descriptor
starting with block 1 (page 0). When a valid UBL signature is found,
@@ -132,7 +132,7 @@ read and processed.
Once the user-specified start-up conditions are set, the RBL copies the
nand_spl into ARM internal RAM, starting at address 0x0000: 0020.
- ^^^^
+ ^^^^
The nand_spl code itself now does necessary intializations, and at least,
copies the u-boot code from NAND into RAM, and jumps to it ...