brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

mips: Add CONFIG_MIPS_MACH_EARLY_INIT for very early mach init code

Browse Source 
This patch adds the optional call to mips_mach_early_init() to start.S
at a very early stage. Its disabled per default. It can be used for
very early machine / platform specific init code.  Its called very
early and at this stage the PC is allowed to differ from the linking
address (CONFIG_TEXT_BASE) as no absolute jump has been performed until
this call.

It will be used by thje Octeon platform.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Stefan Roese 2020-06-30 12:33:16 +02:00 committed by Daniel Schwierzeck
parent 81d4b14f7e
commit de34a61642
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/mips/Kconfig
View File

@ -270,6 +270,15 @@ config MIPS_CACHE_INDEX_BASE
Normally this is CKSEG0. If the MIPS system needs to move this block
to some SRAM or ScratchPad RAM, adapt this option accordingly.
config MIPS_MACH_EARLY_INIT
bool "Enable mach specific very early init code"
help
Use this to enable the call to mips_mach_early_init() very early
from start.S. This function can be used e.g. to do some very early
CPU / SoC intitialization or image copying. Its called very early
and at this stage the PC might not match the linking address
(CONFIG_TEXT_BASE) - no absolute jump done until this call.
config MIPS_CACHE_SETUP
bool "Allow generic start code to initialize and setup caches"
default n if SKIP_LOWLEVEL_INIT

5
arch/mips/cpu/start.S
View File

@ -236,6 +236,11 @@ wr_done:
# endif
#endif
#ifdef CONFIG_MIPS_MACH_EARLY_INIT
bal mips_mach_early_init
nop
#endif
#ifdef CONFIG_MIPS_CACHE_SETUP
/* Initialize caches... */
PTR_LA t9, mips_cache_reset