/arc Files generic to ARC architecture
/arm Files generic to ARM architecture
/avr32 Files generic to AVR32 architecture
- /blackfin Files generic to Analog Devices Blackfin architecture
/m68k Files generic to m68k architecture
/microblaze Files generic to microblaze architecture
/mips Files generic to MIPS architecture
/powerpc Files generic to PowerPC architecture
/sandbox Files generic to HW-independent "sandbox"
/sh Files generic to SH architecture
- /sparc Files generic to SPARC architecture
/x86 Files generic to x86 architecture
/api Machine/arch independent API for external apps
/board Board dependent files
Select high exception vectors of the ARM core, e.g., do not
clear the V bit of the c1 register of CP15.
- CONFIG_SYS_THUMB_BUILD
-
- Use this flag to build U-Boot using the Thumb instruction
- set for ARM architectures. Thumb instruction set provides
- better code density. For ARM architectures that support
- Thumb2 this flag will result in Thumb2 code generated by
- GCC.
-
COUNTER_FREQUENCY
Generic timer clock source frequency.
CONFIG_AT91SAM9XE
enable special bootcounter support on at91sam9xe based boards.
- CONFIG_BLACKFIN
- enable special bootcounter support on blackfin based boards.
CONFIG_SOC_DA8XX
enable special bootcounter support on da850 based boards.
CONFIG_BOOTCOUNT_RAM
consider that a completely unreadable NAND block is bad,
and thus should be skipped silently.
- CONFIG_SPL_ABORT_ON_RAW_IMAGE
- When defined, SPL will proceed to another boot method
- if the image it has loaded does not have a signature.
-
CONFIG_SPL_RELOC_STACK
Adress of the start of the stack SPL will use after
relocation. If unspecified, this is equal to
average for all boards 752 bytes for the whole U-Boot image,
624 text + 127 data).
-On Blackfin, the normal C ABI (except for P3) is followed as documented here:
- http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface
-
- ==> U-Boot will use P3 to hold a pointer to the global data
-
On ARM, the following registers are used:
R0: function argument word/integer result