diff options
| author |   Chris Zankel <chris@zankel.net> | 2013-07-24 22:10:47 (GMT) |
|---|---|---|
| committer |   Max Filippov <jcmvbkbc@gmail.com> | 2015-11-13 06:08:53 (GMT) |
| commit | 81328ed1cbcfb7fbe77552aa9030cddd68ca97b9 (patch) | |
| tree | f26c8b36cd483fbe77759f1ee3706dd57a6d6c90 /config | |
| parent | 57de8dcf22d5ddddee6a44f87f45f2c279fdb1ac (diff) | |
xtensa: add support for the configurable Xtensa architecture.
The Xtensa processor architecture is a configurable, extensible,
and synthesizable 32-bit RISC processor core. Processor and SOC vendors
can select from various processor options and even create customized
instructions in addition to a base ISA to tailor the processor for
a particular application.
Because of the configurability, the build process requires one additional
step for gcc, binutils, and gdb to update the default configuration.
These configurations are packed into an 'overlay' tar image, and are
simply untarred on top of the default configuration during the build.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'config')
| -rw-r--r-- | config/arch/xtensa.in | 20 | ||||
| -rw-r--r-- | config/arch/xtensa.in.2 | 30 |
2 files changed, 50 insertions, 0 deletions
diff --git a/config/arch/xtensa.in b/config/arch/xtensa.in new file mode 100644 index 0000000..dfe6d16 --- /dev/null +++ b/config/arch/xtensa.in @@ -0,0 +1,20 @@ +# xtensa specific configuration file + +## select ARCH_SUPPORTS_32 +## select ARCH_SUPPORTS_BOTH_MMU +## select ARCH_DEFAULT_HAS_MMU +## +## help The xtensa architecture +## help +## help Xtensa is a configurable and extensible processor architecture. +## help Supporting a specific configuration typically requires minor +## help modifications to a small set of configuration files in various +## help development tools. This process is automated and only requires +## help a configuration specific 'overlay' file. +## help +## help For a custom configuration, select the XTENSA_CUSTOM option and +## help provide the name of the overlay file through the +## help CT_ARCH_XTENSA_CUSTOM_NAME option. +## help +## help The default option (ARCH_xtensa_fsf) uses a built-in configuration, +## help which may or may not work for a particular Xtensa processor. diff --git a/config/arch/xtensa.in.2 b/config/arch/xtensa.in.2 new file mode 100644 index 0000000..730ca03 --- /dev/null +++ b/config/arch/xtensa.in.2 @@ -0,0 +1,30 @@ +choice + prompt "Target Architecture Variant" + default ARCH_xtensa_fsf +config XTENSA_CUSTOM + bool "Custom Xtensa processor configuration" + +config ARCH_xtensa_fsf + bool "fsf - Default configuration" + +endchoice + +config ARCH_XTENSA_CUSTOM_NAME + string "Custom Xtensa process configuration file name" + depends on XTENSA_CUSTOM + default "" + help + Enter the name of the custom processor configuration + overlay file or leave blank to use the default 'xtensa-overlay.tar'. + For more information about this option, please also consult + the 'help' section of the 'Target Architecture Variant' + option above. + +config ARCH_XTENSA_CUSTOM_OVERLAY_LOCATION + string "Full path to custom Xtensa processor configurations" + depends on XTENSA_CUSTOM + default "" + help + Enter the path to the directory for the custom processor + configuration file or leave blank to use the default location: + CT_CUSTOM_LOCATION_ROOT_DIR |