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| author | Max Filippov <jcmvbkbc@gmail.com> | 2021-07-25 13:51:02 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2021-10-18 22:19:34 -0700 |
| commit | e369953a5ba3295379095060f4ac72958da7c125 (patch) | |
| tree | b2d7fddbd894fb602084f02e8f79c6d288c8de81 /arch/xtensa/kernel | |
| parent | 519d81956ee277b4419c723adfb154603c2565ba (diff) | |
| download | linux-e369953a5ba3295379095060f4ac72958da7c125.tar.bz2 | |
xtensa: move _SimulateUserKernelVectorException out of WindowVectors
In configurations without window registers support the section
.WindowVectors.text may never be linked.
_SimulateUserKernelVectorException is a common handler for high priority
interrupts, it does not belong in that section anyway. Move it out of
that section and mark it as __XTENSA_HANDLER so it gets bundled with
other vector helpers.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel')
| -rw-r--r-- | arch/xtensa/kernel/vectors.S | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S index 1a7538ccfc5a..0eed5aa82914 100644 --- a/arch/xtensa/kernel/vectors.S +++ b/arch/xtensa/kernel/vectors.S @@ -650,6 +650,25 @@ ENTRY(_Level\level\()InterruptVector) irq_entry_level 5 irq_entry_level 6 +#if XCHAL_EXCM_LEVEL >= 2 + /* + * Continuation of medium priority interrupt dispatch code. + * On entry here, a0 contains PS, and EPC2 contains saved a0: + */ + __XTENSA_HANDLER + .align 4 +_SimulateUserKernelVectorException: + addi a0, a0, (1 << PS_EXCM_BIT) +#if !XTENSA_FAKE_NMI + wsr a0, ps +#endif + bbsi.l a0, PS_UM_BIT, 1f # branch if user mode + xsr a0, excsave2 # restore a0 + j _KernelExceptionVector # simulate kernel vector exception +1: xsr a0, excsave2 # restore a0 + j _UserExceptionVector # simulate user vector exception +#endif + /* Window overflow and underflow handlers. * The handlers must be 64 bytes apart, first starting with the underflow @@ -680,27 +699,6 @@ ENTRY_ALIGN64(_WindowOverflow4) ENDPROC(_WindowOverflow4) - -#if XCHAL_EXCM_LEVEL >= 2 - /* Not a window vector - but a convenient location - * (where we know there's space) for continuation of - * medium priority interrupt dispatch code. - * On entry here, a0 contains PS, and EPC2 contains saved a0: - */ - .align 4 -_SimulateUserKernelVectorException: - addi a0, a0, (1 << PS_EXCM_BIT) -#if !XTENSA_FAKE_NMI - wsr a0, ps -#endif - bbsi.l a0, PS_UM_BIT, 1f # branch if user mode - xsr a0, excsave2 # restore a0 - j _KernelExceptionVector # simulate kernel vector exception -1: xsr a0, excsave2 # restore a0 - j _UserExceptionVector # simulate user vector exception -#endif - - /* 4-Register Window Underflow Vector (Handler) */ ENTRY_ALIGN64(_WindowUnderflow4) |