diff options
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index de323bf4b9..001ece3cf1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -19,6 +19,36 @@ config POSITION_INDEPENDENT from almost any address. This logic relies on the relocation information that is embedded into the binary to support U-Boot relocating itself to the top-of-RAM later during execution. + +config SYS_INIT_SP_BSS_OFFSET + int + help + U-Boot typically uses a hard-coded value for the stack pointer + before relocation. Define this option to instead calculate the + initial SP at run-time. This is useful to avoid hard-coding addresses + into U-Boot, so that can be loaded and executed at arbitrary + addresses and thus avoid using arbitrary addresses at runtime. This + option's value is the offset added to &_bss_start in order to + calculate the stack pointer. This offset should be large enough so + that the early malloc region, global data (gd), and early stack usage + do not overlap any appended DTB. + +config LINUX_KERNEL_IMAGE_HEADER + bool + help + Place a Linux kernel image header at the start of the U-Boot binary. + The format of the header is described in the Linux kernel source at + Documentation/arm64/booting.txt. This feature is useful since the + image header reports the amount of memory (BSS and similar) that + U-Boot needs to use, but which isn't part of the binary. + +if LINUX_KERNEL_IMAGE_HEADER +config LNX_KRNL_IMG_TEXT_OFFSET_BASE + hex + help + The value subtracted from CONFIG_SYS_TEXT_BASE to calculate the + TEXT_OFFSET value written in to the Linux kernel image header. +endif endif config STATIC_RELA |