This patch adds ptrace support.

Changed from previous version:
    1. disable arch_has_single_step and remove single-step instruction handler
    2. add 'Ross Biro 1/23/92' contributor information
    3. clean unused codes
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: NArnd Bergmann <arnd@arndb.de>

This patch implements support for float point unit, which using UniCore-F64 FPU hardware
in UniCore32 ISA.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: NArnd Bergmann <arnd@arndb.de>

This patch adds pm related files, including hibernate and sleep supports.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: NArnd Bergmann <arnd@arndb.de>

This patch implements signals.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>

This patch implements interrupts and gpio handling.
UniCore32 has 9 gpio interrupt sources.
And gpio device operations are also here.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>

This patch implements timer and time.
RTC and PWM device drivers are also here.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>

This patch implements consistent device DMA handling of memory management.
DMA device operations are also here.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch implements fault handling of memory management.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch includes generic codes for memory management.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch implements process/thread related codes. Backtrace and stacktrace are here.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch implements low level entry and setup codes.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch includes processor and system headers. System call interface is here.
We used the syscall interface the same as asm-generic version.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch includes some generic stuff including elf and ksyms.
Because all one-line asm-generic headers are auto-generated by ASM_GENERIC_HEADERS
in arch/unicore32/Makefile, so the rest seems very little.
ELF handling functions and module handling functions are also here.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This patch implements build infrastructure.
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>