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authorRalf Baechle <ralf@linux-mips.org>2005-05-31 11:49:19 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:31:17 +0100
commite50c0a8fa60da9ac0e0a70caa8a3a803815c1f2f (patch)
tree1928e8b0a4b7fb615e5a9f65dc934ba2e74cb9cd /arch/mips/kernel/branch.c
parent10f650db1bcc193ea07d4f8c2f07315da38ea0c4 (diff)
downloadop-kernel-dev-e50c0a8fa60da9ac0e0a70caa8a3a803815c1f2f.zip
op-kernel-dev-e50c0a8fa60da9ac0e0a70caa8a3a803815c1f2f.tar.gz
Support the MIPS32 / MIPS64 DSP ASE.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/branch.c')
-rw-r--r--arch/mips/kernel/branch.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index 56aea5f..374de83 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -22,7 +22,7 @@
*/
int __compute_return_epc(struct pt_regs *regs)
{
- unsigned int *addr, bit, fcr31;
+ unsigned int *addr, bit, fcr31, dspcontrol;
long epc;
union mips_instruction insn;
@@ -99,6 +99,18 @@ int __compute_return_epc(struct pt_regs *regs)
epc += 8;
regs->cp0_epc = epc;
break;
+ case bposge32_op:
+ if (!cpu_has_dsp)
+ goto sigill;
+
+ dspcontrol = rddsp(0x01);
+
+ if (dspcontrol >= 32) {
+ epc = epc + 4 + (insn.i_format.simmediate << 2);
+ } else
+ epc += 8;
+ regs->cp0_epc = epc;
+ break;
}
break;
@@ -200,4 +212,9 @@ unaligned:
printk("%s: unaligned epc - sending SIGBUS.\n", current->comm);
force_sig(SIGBUS, current);
return -EFAULT;
+
+sigill:
+ printk("%s: DSP branch but not DSP ASE - sending SIGBUS.\n", current->comm);
+ force_sig(SIGBUS, current);
+ return -EFAULT;
}
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