From 126336f065e5d80bd2f4c3199df8a573eb0abcf7 Mon Sep 17 00:00:00 2001 From: David Daney Date: Thu, 11 Dec 2008 15:33:34 -0800 Subject: MIPS: Compute branch returns for Cavium OCTEON specific branch instructions. For Cavium OCTEON, compute the return epc value for OCTEON specific branch instructions. Signed-off-by: Tomaso Paoletti Signed-off-by: David Daney Signed-off-by: Ralf Baechle --- arch/mips/kernel/branch.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'arch') diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 6b5df8bfab8..0176ed015c8 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -205,6 +205,39 @@ int __compute_return_epc(struct pt_regs *regs) break; } break; +#ifdef CONFIG_CPU_CAVIUM_OCTEON + case lwc2_op: /* This is bbit0 on Octeon */ + if ((regs->regs[insn.i_format.rs] & (1ull<cp0_epc = epc; + break; + case ldc2_op: /* This is bbit032 on Octeon */ + if ((regs->regs[insn.i_format.rs] & + (1ull<<(insn.i_format.rt+32))) == 0) + epc = epc + 4 + (insn.i_format.simmediate << 2); + else + epc += 8; + regs->cp0_epc = epc; + break; + case swc2_op: /* This is bbit1 on Octeon */ + if (regs->regs[insn.i_format.rs] & (1ull<cp0_epc = epc; + break; + case sdc2_op: /* This is bbit132 on Octeon */ + if (regs->regs[insn.i_format.rs] & + (1ull<<(insn.i_format.rt+32))) + epc = epc + 4 + (insn.i_format.simmediate << 2); + else + epc += 8; + regs->cp0_epc = epc; + break; +#endif } return 0; -- cgit v1.2.3