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* csky: Add perf support for C-SKYGuo Ren2019-01-021-0/+1
| | | | | | | This adds basic perf support for all C-SKY CPUs. Hardware events are only supported by 807/810/860. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* csky: basic ftrace supportedGuo Ren2018-12-311-0/+5
| | | | | | | | | When gcc with -pg, it'll add _mcount stub in every function. We need implement the _mcount in kernel and ftrace depends on stackstrace. To do: call-graph, dynamic ftrace Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* csky: stacktrace supported.Guo Ren2018-12-311-0/+1
| | | | | | | | | The gcc option "-mbacktrace" will push fp(r8),lr into stack and we could unwind the stack with: fp = *fp lr = (unsigned int *)fp[1] Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* csky: Build infrastructureGuo Ren2018-10-251-0/+8
This patch adds Makefile, Kconfig for build infrastructure. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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