Some TX49 do not have FPU. We can tell such CPUs by bit3 of PrID. Here is a patch for 2.4 tree. The first hunk can also be used for 2.6 tree. Please apply. Thank you. diff -ur linux-mips/arch/mips/kernel/cpu-probe.c linux/arch/mips/kernel/cpu-probe.c --- linux-mips/arch/mips/kernel/cpu-probe.c Tue Nov 4 16:57:34 2003 +++ linux/arch/mips/kernel/cpu-probe.c Wed Nov 26 10:35:47 2003 @@ -297,6 +297,8 @@ c->isa_level = MIPS_CPU_ISA_III; c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | MIPS_CPU_LLSC; + if (c->processor_id & 0x08) /* TX49Lx: no FPU */ + c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR); c->tlbsize = 48; break; case PRID_IMP_R5000: diff -ur linux-mips/arch/mips64/kernel/cpu-probe.c linux/arch/mips64/kernel/cpu-probe.c --- linux-mips/arch/mips64/kernel/cpu-probe.c Tue Nov 4 16:57:37 2003 +++ linux/arch/mips64/kernel/cpu-probe.c Wed Nov 26 10:35:50 2003 @@ -622,6 +622,8 @@ c->isa_level = MIPS_CPU_ISA_III; c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | MIPS_CPU_LLSC; + if (c->processor_id & 0x08) /* TX49Lx: no FPU */ + c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR); c->tlbsize = 48; break; case PRID_IMP_R5000: --- Atsushi Nemoto
