This patchset improves the Octeon base support by adding a very early copy of the U-Boot image from bootspace (e.g. parallel NOR CFI flash) to the L2 cache and continue execution there.
This is done by introducing the optional hook mips_mach_early_init() to start.S for very early machine specific code. This code can be selected via the new Kconfig symbol CONFIG_MIPS_MACH_EARLY_INIT.
Additionally, the common invalidate_dcache_range() implementation is also changed to a weak function allowing Octeon to adds its own no-op cache function (Octeon is cache coherent).
This patchset is based on the base Octeon patchsert in v4.
Thanks, Stefan
Changes in v2: - Change mips_mach_early_init() as suggested by Daniel to make it easier to understand and smaller - Drop CONFIG_BOARD_SIZE_LIMIT
Stefan Roese (5): mips: Add CONFIG_MIPS_MACH_EARLY_INIT for very early mach init code mips: octeon: use mips_mach_early_init() to copy to L2 cache mips: octeon: octeon_ebb7304: Change TEXT_BASE to L2 cache mips: cache: Make invalidate_dcache_range() weak to enable overwrite mips: octeon: Add empty invalidate_dcache_range()
arch/mips/Kconfig | 10 ++++++ arch/mips/cpu/start.S | 5 +++ arch/mips/lib/cache.c | 2 +- arch/mips/mach-octeon/cache.c | 4 +++ arch/mips/mach-octeon/lowlevel_init.S | 50 +++++++++++++++++++++++++++ configs/octeon_ebb7304_defconfig | 3 +- 6 files changed, 72 insertions(+), 2 deletions(-)