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| author | Michael Trimarchi <trimarchi@gandalf.sssup.it> | 2009-04-03 19:32:33 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-04-04 17:48:11 +0200 |
| commit | 01ab10393c510342ec4ce85df11ccfa3df06bbb2 (patch) | |
| tree | ebf0493fa7b53941f830f8b300037f834eb85e59 /arch/sh/kernel/traps_32.c | |
| parent | sh: Fix up number of on-chip DMA channels on SH7091. (diff) | |
| download | linux-01ab10393c510342ec4ce85df11ccfa3df06bbb2.tar.xz linux-01ab10393c510342ec4ce85df11ccfa3df06bbb2.zip | |
sh: Fix up DSP context save/restore.
There were a number of issues with the DSP context save/restore code,
mostly left-over relics from when it was introduced on SH3-DSP with
little follow-up testing, resulting in things like task_pt_dspregs()
referencing incorrect state on the stack.
This follows the MIPS convention of tracking the DSP state in the
thread_struct and handling the state save/restore in switch_to() and
finish_arch_switch() respectively. The regset interface is also updated,
which allows us to finally be rid of task_pt_dspregs() and the special
cased task_pt_regs().
Signed-off-by: Michael Trimarchi <michael@evidence.eu.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/traps_32.c')
| -rw-r--r-- | arch/sh/kernel/traps_32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c index 60dcf87ed019..30ca9c51e52d 100644 --- a/arch/sh/kernel/traps_32.c +++ b/arch/sh/kernel/traps_32.c @@ -664,6 +664,8 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5, if (is_dsp_inst(regs)) { /* Enable DSP mode, and restart instruction. */ regs->sr |= SR_DSP; + /* Save DSP mode */ + tsk->thread.dsp_status.status |= SR_DSP; return; } #endif |