diff options
| -rw-r--r-- | nuttx/arch/Kconfig | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/nuttx/arch/Kconfig b/nuttx/arch/Kconfig index 983950d64..643283403 100644 --- a/nuttx/arch/Kconfig +++ b/nuttx/arch/Kconfig @@ -441,11 +441,17 @@ config ARCH_HAVE_SDRAM config BOOT_SDRAM_DATA bool "Data in SDRAM" default n - depends on ARCH_HAVE_SDRAM + depends on ARCH_HAVE_SDRAM && !BOOT_RUNFROMSDRAM ---help--- - This selection should be set if data lies in SDRAM (vs. SRAM). In - that case, the initialization sequence is a little different: SDRAM - must be configured before before the .data and .bss sections can be - initialized. + This selection should be set if data lies in SDRAM (vs. SRAM) and if + SDRAM was not previously initialized by a loader. Obviously, this + does not apply if we booting from SDRAM because SDRAM must have been + initialized priority to loading NuttX into SDRAM. + + In the case where SDRAM must be initialized by NuttX, the + initialization sequence is a little different: Normally, .data and + .bss must be initialized before starting the system. But in this + case SDRAM must be configured by board-specific logic before the + .data and .bss sections can be initialized. endmenu # Boot Memory Configuration |