[PATCH v3 0/4] support for booting the compressed U-boot binary on Rockchip based ARM64 SOC's

[Manoj Sai]

This patchset adds the support on Rockchip based ARM64 SOC's that  compress the U-BOOT proper along with dtb
and ATF in FIT image format.Second stage bootloader(SPL) loads the compressed binaries, uncompress
them and  handover control to the next stage.

Changes for V3 :-

1. Replaced spl_decompression_enabled() function instead of checking IS_ENABLED(CONFIG_SPL_GZIP)
   and IS_ENABLED(CONFIG_SPL_LZMA) in spl_fit.c

2. Removed extra wrapping parentheses in spl_decompression_enabled().

Size Comparision between compressed and uncompressed binaries :-

       size of uncompressed binary    :- 9.0M (94,21,824 bytes)
         manoj:u-boot$ ls -lb u-boot-rockchip.bin
        -rw-rw-r-- 1 manoj manoj 9421824 Sep 10 22:22 u-boot-rockchip.bin

       size of GZIP compressed binary :- 8.6M (89,85,088 bytes)
         manoj:u-boot$ ls -lb u-boot-rockchip.bin
         -rw-rw-r-- 1 manoj manoj 8985088 Jul 25 07:42 u-boot-rockchip.bin

       size of LZMA compressed binary :- 8.6 M (90,06,592 bytes)
         manoj:u-boot$ ls -lb u-boot-rockchip.bin
         -rw-rw-r-- 1 manoj manoj 9006592 Jul 25 07:47 u-boot-rockchip.bin

Test results of  Booting time using bootstage command in Uboot command prompt on roc-rk3399-pc board :-

1) Uncompressed U-BOOT : Total boot time ≈ 12.063971 seconds
=> bootstage report
Timer summary in microseconds (10 records):
       Mark    Elapsed  Stage
          0          0  reset
  1,833,884  1,833,884  board_init_f
  2,959,528  1,125,644  board_init_r
  5,224,521  2,264,993  eth_common_init
  5,523,428    298,907  eth_initialize
  5,523,606        178  main_loop
  5,523,764        158  usb_start
 12,063,971  6,540,207  cli_loop

2) GZIP Compressed U-BOOT : Total time ≈ 12.824968 seconds

=> bootstage report
Timer summary in microseconds (10 records):
       Mark    Elapsed  Stage
          0          0  reset
  2,594,709  2,594,709  board_init_f
  3,719,969  1,125,260  board_init_r
  5,985,450  2,265,481  eth_common_init
  6,284,371    298,921  eth_initialize
  6,284,549        178  main_loop
  6,284,708        159  usb_start
 12,824,968  6,540,260  cli_loop

3) LZMA Compressed U-BOOT : Total time ≈ 17.025004 seconds

=> bootstage report
Timer summary in microseconds (10 records):
       Mark    Elapsed  Stage
          0          0  reset
  6,852,254  6,852,254  board_init_f
  7,940,143  1,087,889  board_init_r
 10,190,458  2,250,315  eth_common_init
 10,487,254    296,796  eth_initialize
 10,487,432        178  main_loop
 10,487,590        158  usb_start
 17,025,004  6,537,414  cli_loop


As per suggestion from Mr.Jonas Karlman (jonas at kwiboo.se) through Patchset V2,that check boot time
with enabling CONFIG_SPL_FIT_SIGNATURE that might impact boot time.

Tried to check the boot time with CONFIG_FIT_SIGNATURE enabled, I didnt find any significant
boot time improvement  with enabling CONFIG_SPL_FIT_SIGNATURE.

Comparision of GZIP and LZMA compressed U-boot Boot time with and without Enable of CONFIG_FIT_SIGNATURE :-

- GZIP Compressed U-BOOT  and CONFIG_FIT_SIGNATURE enabled  :-  Total time ≈ 13.283998 seconds

=> bootstage report
Timer summary in microseconds (10 records):
       Mark    Elapsed  Stage
          0          0  reset
  3,052,571  3,052,571  board_init_f
  4,179,787  1,127,216  board_init_r
  6,445,472  2,265,685  eth_common_init
  6,744,416    298,944  eth_initialize
  6,744,593        177  main_loop
  6,744,751        158  usb_start
 13,283,998  6,539,247  cli_loop

- GZIP Compressed U-BOOT and CONFIG_FIT_SIGNATURE disabled  :- Total time ≈ 12.824968 seconds


- LZMA Compressed U-BOOT  and CONFIG_FIT_SIGNATURE enabled  :-  Total time ≈ 17.005996 seconds

   => bootstage report
Timer summary in microseconds (10 records):
       Mark    Elapsed  Stage
          0          0  reset
  6,775,071  6,775,071  board_init_f
  7,902,443  1,127,372  board_init_r
 10,167,546  2,265,103  eth_common_init
 10,466,418    298,872  eth_initialize
 10,466,595        177  main_loop
 10,466,753        158  usb_start
 17,005,996  6,539,243  cli_loop

- LZMA Compressed U-BOOT  and CONFIG_FIT_SIGNATURE disabled  :- Total time ≈ 17.025004 seconds

Manoj Sai (4):
  spl: fit: support for booting a GZIP-compressed U-boot binary
  spl: fit: support for booting a LZMA-compressed U-boot binary
  rockchip: Add support to generate GZIP compressed U-boot binary
  rockchip: Add support to generate LZMA compressed U-boot binary

 arch/arm/dts/rockchip-u-boot.dtsi | 11 +++++++++++
 common/spl/spl_fit.c              | 20 +++++++++++++++++---
 include/spl.h                     | 10 ++++++++++
 3 files changed, 38 insertions(+), 3 deletions(-)

--
2.25.1