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| author | Vineet Gupta | 2019-05-16 01:08:10 +0200 |
|---|---|---|
| committer | Vineet Gupta | 2019-07-08 10:24:44 +0200 |
| commit | 68e5c6f073bcf70da5f8eef88eb2d98f7c560bb6 (patch) | |
| tree | 48580fcf457d50fb7202191f20888a18aa74b212 /arch/arc | |
| parent | ARCv2: entry: rewrite to enable use of double load/stores LDD/STD (diff) | |
| download | kernel-qcow2-linux-68e5c6f073bcf70da5f8eef88eb2d98f7c560bb6.tar.gz kernel-qcow2-linux-68e5c6f073bcf70da5f8eef88eb2d98f7c560bb6.tar.xz kernel-qcow2-linux-68e5c6f073bcf70da5f8eef88eb2d98f7c560bb6.zip | |
ARC: entry: EV_Trap expects r10 (vs. r9) to have exception cause
avoids 1 MOV instruction in light of double load/store code
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/entry-arcv2.h | 3 | ||||
| -rw-r--r-- | arch/arc/include/asm/entry-compact.h | 4 | ||||
| -rw-r--r-- | arch/arc/kernel/entry-compact.S | 2 | ||||
| -rw-r--r-- | arch/arc/kernel/entry.S | 4 |
4 files changed, 6 insertions, 7 deletions
diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h index 0733752ce7fe..f5ae394ebe06 100644 --- a/arch/arc/include/asm/entry-arcv2.h +++ b/arch/arc/include/asm/entry-arcv2.h @@ -95,9 +95,8 @@ lr r10, [ecr] lr r11, [erbta] ST2 r10, r11, PT_event - mov r9, r10 - ; OUTPUT: r9 has ECR + ; OUTPUT: r10 has ECR expected by EV_Trap .endm /*------------------------------------------------------------------------ diff --git a/arch/arc/include/asm/entry-compact.h b/arch/arc/include/asm/entry-compact.h index 66ba1bf21d28..66a292335ee6 100644 --- a/arch/arc/include/asm/entry-compact.h +++ b/arch/arc/include/asm/entry-compact.h @@ -195,8 +195,8 @@ PUSHAX CTOP_AUX_EFLAGS #endif - lr r9, [ecr] - st r9, [sp, PT_event] /* EV_Trap expects r9 to have ECR */ + lr r10, [ecr] + st r10, [sp, PT_event] /* EV_Trap expects r10 to have ECR */ .endm /*-------------------------------------------------------------- diff --git a/arch/arc/kernel/entry-compact.S b/arch/arc/kernel/entry-compact.S index 7fe59880c16b..5cb0cd7e4eab 100644 --- a/arch/arc/kernel/entry-compact.S +++ b/arch/arc/kernel/entry-compact.S @@ -256,7 +256,7 @@ ENTRY(EV_TLBProtV) EXCEPTION_PROLOGUE - mov r2, r9 ; ECR set into r9 already + mov r2, r10 ; ECR set into r10 already lr r0, [efa] ; Faulting Data address (not part of pt_regs saved above) ; Exception auto-disables further Intr/exceptions. diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index a2bfacbcfce1..72be01270e24 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -232,8 +232,8 @@ ENTRY(EV_Trap) EXCEPTION_PROLOGUE ;============ TRAP 1 :breakpoints - ; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR) - bmsk.f 0, r9, 7 + ; Check ECR for trap with arg (PROLOGUE ensures r10 has ECR) + bmsk.f 0, r10, 7 bnz trap_with_param ;============ TRAP (no param): syscall top level |