From e50c0a8fa60da9ac0e0a70caa8a3a803815c1f2f Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 31 May 2005 11:49:19 +0000 Subject: Support the MIPS32 / MIPS64 DSP ASE. Signed-off-by: Ralf Baechle --- arch/mips/kernel/branch.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) (limited to 'arch/mips/kernel/branch.c') diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 56aea5f526a7..374de839558d 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; } -- cgit