CONFIG_SRAM_OFFSET¶
Kernel SRAM offset
Type: hex
Help¶
A lot of x86 that resemble PCs have many reserved physical memory
regions within the first megabyte. Specify an offset from the
beginning of RAM to load the kernel in physical memory, avoiding these
regions.
Note that this does not include the "locore" which contains real mode
bootstrap code within the first 64K of physical memory.
This value normally need to be page-aligned.
Help¶
This option specifies the byte offset from the beginning of SRAM
where the kernel begins. Changing this value from zero will affect
the Zephyr image's link, and will decrease the total amount of
SRAM available for use by application code.
If unsure, leave at the default value 0.
Defaults¶
0x100000 if
X86_PC_COMPATIBLE0
Kconfig definitions¶
At arch/x86/Kconfig:177
Included via Kconfig:8 → Kconfig.zephyr:39 → arch/Kconfig:12
Menu path: (Top) → X86 Architecture Options
config SRAM_OFFSET
hex
default 0x100000 if X86_PC_COMPATIBLE
depends on X86
help
A lot of x86 that resemble PCs have many reserved physical memory
regions within the first megabyte. Specify an offset from the
beginning of RAM to load the kernel in physical memory, avoiding these
regions.
Note that this does not include the "locore" which contains real mode
bootstrap code within the first 64K of physical memory.
This value normally need to be page-aligned.
At Kconfig.zephyr:210
Included via Kconfig:8
Menu path: (Top) → Build and Link Features → Linker Options
config SRAM_OFFSET
hex "Kernel SRAM offset" if HAS_SRAM_OFFSET
default 0
help
This option specifies the byte offset from the beginning of SRAM
where the kernel begins. Changing this value from zero will affect
the Zephyr image's link, and will decrease the total amount of
SRAM available for use by application code.
If unsure, leave at the default value 0.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)