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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2020-03-05 23:02:51 +0300
committerVineet Gupta <vgupta@synopsys.com>2020-03-16 20:30:49 +0300
commit7321e2ea0d6aece516a9c0827028ecda2ccaeae9 (patch)
treed53d77373a555448b2ef633c04e84dc9f3c6cc38 /arch/arc/Kconfig
parent4827d0cf744e7e9cc73f10e1f4eaca904a3868c1 (diff)
downloadlinux-7321e2ea0d6aece516a9c0827028ecda2ccaeae9.tar.xz
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 <vgupta@synopsys.com> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
-rw-r--r--arch/arc/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 55432a8fc20d..eb3bcb206882 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -411,6 +411,9 @@ config ARC_HAS_ACCL_REGS
config ARC_DSP_HANDLED
def_bool n
+config ARC_DSP_SAVE_RESTORE_REGS
+ def_bool n
+
choice
prompt "DSP support"
default ARC_DSP_NONE
@@ -433,6 +436,15 @@ config ARC_DSP_KERNEL
DSP extension presence in HW, no support for DSP-enabled userspace
applications. We don't save / restore DSP registers and only do
some minimal preparations so userspace won't be able to break kernel
+
+config ARC_DSP_USERSPACE
+ bool "Support DSP for userspace apps"
+ select ARC_HAS_ACCL_REGS
+ select ARC_DSP_HANDLED
+ select ARC_DSP_SAVE_RESTORE_REGS
+ help
+ DSP extension presence in HW, support save / restore DSP registers to
+ run DSP-enabled userspace applications
endchoice
config ARC_IRQ_NO_AUTOSAVE