diff options
Diffstat (limited to 'src/cpu/samsung/exynos5420')
| -rw-r--r-- | src/cpu/samsung/exynos5420/Kconfig | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/cpu/samsung/exynos5420/Kconfig b/src/cpu/samsung/exynos5420/Kconfig index d3eafcba75..66679a000b 100644 --- a/src/cpu/samsung/exynos5420/Kconfig +++ b/src/cpu/samsung/exynos5420/Kconfig @@ -69,7 +69,17 @@ config ROMSTAGE_SIZE # at the top of IRAM for now. # # Stack grows downward, push operation stores register contents in -# consecutive memory locations ending just below SP +# consecutive memory locations ending just below SP. +# The setup in the exynos 5420 is a new one for coreboot. We have got +# the bootblock, romstage, and ramstage sharing the same stack space. +# The SRAM is always there and having a known-good stack memory +# makes for a more reliable setup. +# Thus, in this case: +# STACK_TOP: highest stack address in SRAM +# STACK_BOTTOM: lowest stack address in SRAM +# STACK_SIZE: as in standard coreboot usage, size of thread stacks in ramstage +# ROMSTAGE_STACK_SIZE: size of the single stack in romstage + config STACK_TOP hex default 0x02073000 @@ -78,10 +88,18 @@ config STACK_BOTTOM hex default 0x0206f000 -config STACK_SIZE +# The romstage stack must be large enough to contain the lzma buffer +config ROMSTAGE_STACK_SIZE hex default 0x4000 +# STACK_SIZE is for the ramstage core and thread stacks. +# It must be a power of 2, to make the cpu_info computation work, +# and cpu_info needs to work to make SMP startup and threads work. +config STACK_SIZE + hex + default 0x0800 + # TODO We may probably move this to board-specific implementation files instead # of KConfig values. config CBFS_CACHE_ADDRESS |