To be able to run DSP-enabled userspace applications with AGU
(address generation unit) extensions we additionally need to
save and restore following registers at context switch:
* AGU_AP*
* AGU_OS*
* AGU_MOD*
Signed-off-by: Eugeniy Paltsev
---
arch/arc/Kconfig| 7 +++
ar
Arc processors may have DSP extension which is optional.
In this patch series we:
* Handle issues caused by DSP extension presence in HW
* Add optional support for DSP-enabled applications in
userspace (with optional AGU extension support)
* Do minor cleanups
Eugeniy Paltsev (5):
ARC: pt_regs:
To be able to run DSP-enabled userspace applications we need to
save and restore following DSP-related registers:
At IRQ/exception entry/exit:
* ACC0_GLO, ACC0_GHI, DSP_CTRL
* ACC0_LO, ACC0_HI (we already save them as r58, r59 pair)
At context switch:
* DSP_BFLY0, DSP_FFT_CTRL
Signed-off-by: Eu
In case of DSP extension presence in HW some instructions
(related to integer multiply, multiply-accumulate, and divide
operation) executes on this DSP execution unit. So their
execution will depend on dsp configuration register (DSP_CTRL)
As we want these instructions to execute the same way rega
We'll use this macro in coming patches extensively.
Signed-off-by: Eugeniy Paltsev
---
arch/arc/kernel/setup.c | 29 -
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 7ee89dc61f6e..edb55b6ee278 10
Replace hardcoded registers offset numbers by calculated via
offsetof.
Signed-off-by: Eugeniy Paltsev
---
arch/arc/include/asm/entry-arcv2.h | 8
arch/arc/kernel/asm-offsets.c | 9 +
2 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/arc/include/asm/entry-
