From 7321e2ea0d6aece516a9c0827028ecda2ccaeae9 Mon Sep 17 00:00:00 2001 From: Eugeniy Paltsev Date: Thu, 5 Mar 2020 23:02:51 +0300 Subject: ARC: add support for DSP-enabled userspace applications 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 Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta --- arch/arc/include/asm/entry-arcv2.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arc/include/asm/entry-arcv2.h') diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h index dd6aa18b51ca..ae0aa5323be1 100644 --- a/arch/arc/include/asm/entry-arcv2.h +++ b/arch/arc/include/asm/entry-arcv2.h @@ -192,6 +192,9 @@ ld r25, [sp, PT_user_r25] #endif + /* clobbers r10, r11 registers pair */ + DSP_RESTORE_REGFILE_IRQ + #ifdef CONFIG_ARC_HAS_ACCL_REGS LD2 r58, r59, PT_r58 #endif -- cgit