[U-Boot] [PATCH v3 0/6] spl: full-featured heap cleanups

[Simon Goldschmidt]

Some platforms cannot use simple malloc even in very early stages, e.g.
when using FAT before DRAM is available. Such platforms currently often
use non-Kconfig defines to initialize full malloc and rely on simple heap
before that.

This series makes some adjustments to ensure SPL behaves the same with
simple or full malloc: when CONFIG_SPL_SYS_MALLOC_F_LEN is != 0, both heap
types can be used (by changing CONFIG_SPL_SYS_MALLOC_SIMPLE), without
manually supplying an address range for the full heap.

Changes in v3:
- improve commit message to show why CONFIG_CLEAR_BSS_F is needed
- fixed summary ("stack" -> "heap")
- enable CONFIG_SPL_CLEAR_BSS_F for socfpga_arria10 using full malloc
  early in SPL
- rebased

Changes in v2:
- make CONFIG_SPL_CLEAR_BSS_F depend on ARM for now
- add CONFIG_SPL_CLEAR_BSS_F implementation for arm64 also
- use if() instead of #if
- adapt documentation to using CONFIG_SPL_SYS_MALLOC_F_LEN for
  full-featured heap as well
- ensure SPL_CLEAR_BSS_F is set when using SYS_MALLOC_F_LEN for full
  featured heap (or else, the heap status stored in bss will be overwritten
  between board_init_f and board_init_r)

Simon Goldschmidt (6):
  spl: add Kconfig option to clear bss early
  spl: arm: implement SPL_CLEAR_BSS_F
  dlmalloc: fix malloc range at end of ram
  dlmalloc: be compatible to tiny printf
  spl: support using full malloc with SYS_MALLOC_F_LEN
  arm: socfpga: a10: move SPL heap size to Kconfig

 Kconfig                           | 24 ++++++++++++++--------
 README                            | 15 ++++++++++----
 arch/arm/lib/crt0.S               | 22 +++++++++++++++++++++
 arch/arm/lib/crt0_64.S            | 14 +++++++++++++
 common/dlmalloc.c                 |  6 +++++-
 common/spl/Kconfig                | 12 +++++++++++
 common/spl/spl.c                  | 10 ++++++++--
 configs/socfpga_arria10_defconfig |  2 ++
 drivers/core/Kconfig              | 33 +++++++++++++++----------------
 include/configs/socfpga_common.h  | 14 -------------
 10 files changed, 106 insertions(+), 46 deletions(-)

-- 
2.17.1