diff options
Diffstat (limited to 'arch/openrisc/kernel/entry.S')
| -rw-r--r-- | arch/openrisc/kernel/entry.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index a130c4dac48d..c7b47e571220 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -106,6 +106,8 @@ l.mtspr r0,r3,SPR_EPCR_BASE ;\ l.lwz r3,PT_SR(r1) ;\ l.mtspr r0,r3,SPR_ESR_BASE ;\ + l.lwz r3,PT_FPCSR(r1) ;\ + l.mtspr r0,r3,SPR_FPCSR ;\ l.lwz r2,PT_GPR2(r1) ;\ l.lwz r3,PT_GPR3(r1) ;\ l.lwz r4,PT_GPR4(r1) ;\ @@ -175,6 +177,8 @@ handler: ;\ /* r30 already save */ ;\ l.sw PT_GPR31(r1),r31 ;\ TRACE_IRQS_OFF_ENTRY ;\ + l.mfspr r30,r0,SPR_FPCSR ;\ + l.sw PT_FPCSR(r1),r30 ;\ /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\ l.addi r30,r0,-1 ;\ l.sw PT_ORIG_GPR11(r1),r30 @@ -215,6 +219,8 @@ handler: ;\ /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\ l.addi r30,r0,-1 ;\ l.sw PT_ORIG_GPR11(r1),r30 ;\ + l.mfspr r30,r0,SPR_FPCSR ;\ + l.sw PT_FPCSR(r1),r30 ;\ l.addi r3,r1,0 ;\ /* r4 is exception EA */ ;\ l.addi r5,r0,vector ;\ @@ -1087,6 +1093,10 @@ ENTRY(_switch) l.sw PT_GPR28(r1),r28 l.sw PT_GPR30(r1),r30 + /* Store the old FPU state to new pt_regs */ + l.mfspr r29,r0,SPR_FPCSR + l.sw PT_FPCSR(r1),r29 + l.addi r11,r10,0 /* Save old 'current' to 'last' return value*/ /* We use thread_info->ksp for storing the address of the above @@ -1109,6 +1119,10 @@ ENTRY(_switch) l.lwz r29,PT_SP(r1) l.sw TI_KSP(r10),r29 + /* Restore the old value of FPCSR */ + l.lwz r29,PT_FPCSR(r1) + l.mtspr r0,r29,SPR_FPCSR + /* ...and restore the registers, except r11 because the return value * has already been set above. */ |