xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARC: add support for DSP-enabled userspace applications

Browse Source 
To be able to run DSP-enabled userspace applications we need to
save and restore following DSP-related registers:
At IRQ/exception entry/exit:
 * DSP_CTRL (save it and reset to value suitable for kernel)
 * ACC0_LO, ACC0_HI (we already save them as r58, r59 pair)
At context switch:
 * ACC0_GLO, ACC0_GHI
 * DSP_BFLY0, DSP_FFT_CTRL

Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Eugeniy Paltsev
2020-03-05 23:02:51 +03:00
committed by Vineet Gupta
parent 4827d0cf74
commit 7321e2ea0d
9 changed files with 127 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arc/include/asm/switch_to.h
View File

@@ -9,6 +9,7 @@
#ifndef __ASSEMBLY__
#include <linux/sched.h>
#include <asm/dsp-impl.h>
#include <asm/fpu.h>
#ifdef CONFIG_ARC_PLAT_EZNPS
@@ -24,6 +25,7 @@ struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
#define switch_to(prev, next, last) \
do { \
ARC_EZNPS_DP_PREV(prev, next); \
dsp_save_restore(prev, next); \
fpu_save_restore(prev, next); \
last = __switch_to(prev, next);\
mb(); \