Hello all; I'm working on getting mips-linux up and running on my Octane, which may be an impossible task. I am new to the MIPS architecture, and I'm absorbing a lot of information rapidly from MIPS Inc. manuals, See MIPS Run, et. al., but I have been banging my head against the wall for a couple days trying to get a simple problem fixed. First, my Octane works just fine with Irix 6.5.17. Configuration is a R12K CPU/300 mhz, 256MB RAM, 1 18G disk, ethernet connection. I boot using bootp. I've used the network to boot fx, a copy of the irix kernel, etc. I get the following messages when I try to boot the (very slightly) modified linux kernel I am working with: --start messages Obtaining /vmlinux.64 from server 1813568+1150976+172144 entry: 0xa8000000211c4000 *** PROM write error on cacheline 0x1fcd3b00 at PC=0x211c4018 RA=0xffffffff9fc5ace4 --end messages The PC address is the first instruction in head.S (mips64) that touches the control register. I've tried multiple fixes, including initializing the whole TLB before the error occurs. Same error. Can anyone tell me: 1) What does this error text mean exactly? 2) What is "RA"? The address is a location in the PROM text/stack section. 3) Am I missing something simple? An initialization, a rule I'm not following? objdump of the head.S I am using is below. Thanks for any clues you can provide. I'm excited to get working on this machine if I can just learn MIPS =\ Erik Disassembly of section .text.init: a8000000211c4000 <kernel_entry>: a8000000211c4000: 37bd000f ori sp,sp,0xf a8000000211c4004: 3bbd000f xori sp,sp,0xf a8000000211c4008: 3c0c211c lui t0,0x211c a8000000211c400c: 258c4018 addiu t0,t0,16408 a8000000211c4010: 01800008 jr t0 a8000000211c4014: 00000000 nop a8000000211c4018: 400c6000 mfc0 t0,$12 a8000000211c401c: 3c0d1000 lui t1,0x1000 a8000000211c4020: 35ad001f ori t1,t1,0x1f a8000000211c4024: 018d6025 or t0,t0,t1 a8000000211c4028: 398c001f xori t0,t0,0x1f a8000000211c402c: 408c6000 mtc0 t0,$12 a8000000211c4030: 3c1c211c lui gp,0x211c a8000000211c4034: 279c0000 addiu gp,gp,0 a8000000211c4038: 679d3fe0 daddiu sp,gp,16352 a8000000211c403c: 8f8c0060 lw t0,96(gp) -- Erik J. Green erik@greendragon.org
