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| author |   Guo Ren <ren_guo@c-sky.com> | 2018-12-31 15:17:48 +0800 |
|---|---|---|
| committer | Guo Ren <ren_guo@c-sky.com> | 2018-12-31 22:57:27 +0800 |
| commit | 789154c2ad74c29c3c60c5136c1785745abe4897 (patch) | |
| tree | f844b0a765ac5d5d2b027fc5b7e7ed9b4936db0b /arch/csky/kernel | |
| parent | csky: remove syscall_exit_work (diff) | |
| download | linux-dev-789154c2ad74c29c3c60c5136c1785745abe4897.tar.xz linux-dev-789154c2ad74c29c3c60c5136c1785745abe4897.zip | |
csky: fixup save hi,lo,dspcr regs in switch_stack.
HI, LO, DSPCR registers are 807/810 related regs and no need for 610/860.
All of the regs must be saved in pt_regs and switch_stack. This patch
fixup saving dspcr reg in switch_stack and pt_regs.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Diffstat (limited to 'arch/csky/kernel')
| -rw-r--r-- | arch/csky/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/csky/kernel/entry.S | 22 | ||||
| -rw-r--r-- | arch/csky/kernel/ptrace.c | 4 |
3 files changed, 3 insertions, 25 deletions
diff --git a/arch/csky/kernel/asm-offsets.c b/arch/csky/kernel/asm-offsets.c index 8d3ed811321f..2f07670ac65f 100644 --- a/arch/csky/kernel/asm-offsets.c +++ b/arch/csky/kernel/asm-offsets.c @@ -24,8 +24,6 @@ int main(void) DEFINE(THREAD_FESR, offsetof(struct thread_struct, user_fp.fesr)); DEFINE(THREAD_FCR, offsetof(struct thread_struct, user_fp.fcr)); DEFINE(THREAD_FPREG, offsetof(struct thread_struct, user_fp.vr)); - DEFINE(THREAD_DSPHI, offsetof(struct thread_struct, hi)); - DEFINE(THREAD_DSPLO, offsetof(struct thread_struct, lo)); /* offsets into the thread_info struct */ DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags)); diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S index 2b4a8515f7e5..de378e479dee 100644 --- a/arch/csky/kernel/entry.S +++ b/arch/csky/kernel/entry.S @@ -346,34 +346,12 @@ ENTRY(__switch_to) stw sp, (a3, THREAD_KSP) -#ifdef CONFIG_CPU_HAS_HILO - lrw r10, THREAD_DSPHI - add r10, a3 - mfhi r6 - mflo r7 - stw r6, (r10, 0) /* THREAD_DSPHI */ - stw r7, (r10, 4) /* THREAD_DSPLO */ - mfcr r6, cr14 - stw r6, (r10, 8) /* THREAD_DSPCSR */ -#endif - /* Set up next process to run */ lrw a3, TASK_THREAD addu a3, a1 ldw sp, (a3, THREAD_KSP) /* Set next kernel sp */ -#ifdef CONFIG_CPU_HAS_HILO - lrw r10, THREAD_DSPHI - add r10, a3 - ldw r6, (r10, 8) /* THREAD_DSPCSR */ - mtcr r6, cr14 - ldw r6, (r10, 0) /* THREAD_DSPHI */ - ldw r7, (r10, 4) /* THREAD_DSPLO */ - mthi r6 - mtlo r7 -#endif - ldw a2, (a3, THREAD_SR) /* Set next PSR */ mtcr a2, psr diff --git a/arch/csky/kernel/ptrace.c b/arch/csky/kernel/ptrace.c index 34b30257298f..a76d466e1d0a 100644 --- a/arch/csky/kernel/ptrace.c +++ b/arch/csky/kernel/ptrace.c @@ -95,7 +95,9 @@ static int gpr_set(struct task_struct *target, return ret; regs.sr = task_pt_regs(target)->sr; - +#ifdef CONFIG_CPU_HAS_HILO + regs.dcsr = task_pt_regs(target)->dcsr; +#endif task_thread_info(target)->tp_value = regs.tls; *task_pt_regs(target) = regs; |