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nds32: nds32 FPU port

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This patch set contains basic components for supporting the nds32 FPU,
such as exception handlers and context switch for FPU registers. By
default, the lazy FPU scheme is supported and the user can configure it via
CONFIG_LZAY_FPU.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This commit is contained in:
Vincent Chen
2018-11-22 11:14:34 +08:00
committed by Greentime Hu
parent 4f014a41b4
commit e46bf83c18
17 changed files with 589 additions and 16 deletions
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5
arch/nds32/include/uapi/asm/sigcontext.h
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@@ -9,6 +9,10 @@
* before the signal handler was invoked. Note: only add new entries
* to the end of the structure.
*/
struct fpu_struct {
unsigned long long fd_regs[32];
unsigned long fpcsr;
};
struct zol_struct {
unsigned long nds32_lc; /* $LC */
@@ -54,6 +58,7 @@ struct sigcontext {
unsigned long fault_address;
unsigned long used_math_flag;
/* FPU Registers */
struct fpu_struct fpu;
struct zol_struct zol;
};