diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_vectors.S')
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_vectors.S | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_vectors.S b/nuttx/arch/arm/src/stm32/stm32_vectors.S index 714244686..ee4220ccc 100644 --- a/nuttx/arch/arm/src/stm32/stm32_vectors.S +++ b/nuttx/arch/arm/src/stm32/stm32_vectors.S @@ -3,7 +3,7 @@ * arch/arm/src/chip/stm32_vectors.S * * Copyright (C) 2009-2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -254,7 +254,7 @@ stm32_common: * values to the stack. */ - add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */ + add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */ ldmia r1, {r4-r11} /* Fetch eight registers in HW save area */ ldr r1, [r0, #(4*REG_SP)] /* R1=Value of SP before interrupt */ stmdb r1!, {r4-r11} /* Store eight registers in HW save area */ @@ -263,6 +263,17 @@ stm32_common: #else ldmia r0, {r2-r11} /* Recover R4-R11 + 2 temp values */ #endif + + /* We may also need to restore FPU registers. This is not done in + * normal interrupt save/restore because the cost is prohibitive. This + * is only done when switching contexts. A consequence of this is that + * floating point operations may not be performed in interrupt handling + * logic. + */ + +#ifdef CONFIG_ARCH_FPU + bl up_restorefpu /* Restore the FPU registers */ +#endif b 2f /* Re-join common logic */ /* We are returning with no context switch. We simply need to "unwind" |