- remove printk

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - Support ck860 smp cache flush range
 - Seperate tlb_vma_start into abiv1 & abiv2
 - Seperate cacheflush.c into abiv1 & abiv2
 - Remove dcache_inv_* api
 - Add cacheflush syscall cache_flush_range for abiv2

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - ck860 smp support CONFIG_RAM_BASE
 - remove CONFIG_SSEG0_BASE in .config
 - define PHYS_OFFSET_OFFSET and PHYS_OFFSET :)

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - remove linux-4.15 support

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - When start is not cacheline aligned, we need make it aligned.
 - For ck860 dcache.ciall is only for one cpu, and we need ipi to tell
   other cpus.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

When calling copy_to_user/copy_from_user/put_user/get_user in kernel space,
it will cause alignment fault and we need use fixup_exception_table() just
like we do in do_page_fault().

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Use 0x1464 for a user space bkpt, and it will cause a illegal
instruction excetpion.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - No kernel fixup
 - No stm ldm stq ldq
 - more clear coding convenstion

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

This bug make abiv1 epoll-ltp failed.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

This is the first verion for C-SKY SMP. It only support ck860mp and up
to 4 cores.

ck860mp introduce some new features for atomic operation, eg:
 - ldex/stex
 - tlbi
 - mem barreior
 - soc multi-cores reset controller

It's new start point for C-SKY high performance SMP CPU.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Now all dma apis support highmem for map.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

We don't need redefine the __NR_rt_sigreturn for csky.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

user_regset_copyin should pass "struct "pt_regs *" not "**".

This will destory the kernel stack and panic the system.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - pt_regs is wrong number for rx, it will cause get fpc fpesr error.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

user_regset_copyin should pass "struct "pt_regs *" not "**".

This will destory the kernel stack and panic the system.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

 - pt_regs is wrong number for rx, it will cause get fpc fpesr error.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>