Has anyone tried booting IP28 lately?
I tried a cut of 3.16 from git (~08/05/14) and I get the following crash at
the ARCS console:
Exception: <vector=normal>
Status register: 0x34004882<CU1,CU0,FR,IM7,IM4,IPL=???,KX,MODE=KERNEL>
Cause register: 0x10<CE=0,EXC=RADE>
Exception PC: 0xa800000020654004, Exception RA: 0xa800000020654c9c
Read address error exception, bad address: 0xdfbdd600
Local I/O interrupt register 2: 0x0xc8<EISA,SLOT0,SLOT1>
Saved user regs in hex (&gpda9000000020f01dc8, & regs 0x9000000020f01fc9):
arg: dfbe0000 ffffffffa8000000 ffffffffa8000000 40000 20690000 20690000
20690000 9
tmp: 9 38 0 ffffffff9fc60670
sve: a8000000204f1330 ffffffff9fc572d0 ffffffff9fc572d3
t8 206e0000 t9 206e0000 at 34004880 v0 dfbd9800 v1 a800000020654fe0 k1
ffffffffbad11bad
gp a80000002060c000 fp 740b sp a80000002060fdc0 ra a800000020654c9c
PANIC: Unexpected exception
Going by the Exception PC and the RA, I figured out which line looks to be
causing this:
(gdb) l *(sgihpc_init+0x78)
0xa800000020654004 is in sgihpc_init (arch/mips/sgi-ip22/ip22-hpc.c:41).
36 hpc3c1 = (struct hpc3_regs *)
37 ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs));
38 /* IOC lives in PBUS PIO channel 6 */
39 sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6];
40
--> 41 hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16;
42 if (ip22_is_fullhouse()) {
43 /* Full House comes with INT2 which lives in
PBUS PIO
44 * channel 4 */
45 sgint = (struct sgint_regs
*)hpc3c0->pbus_extregs[4];
To me, it looks like a pointer isn't getting converted to 64bit address
space correctly (0xdfbdd600 -> ???). I haven't played with this IP28
machine for a few years, so I forget what the best approach to fixing this is.
Thoughts?
--
Joshua Kinard
Gentoo/MIPS
kumba@xxxxxxxxxx
4096R/D25D95E3 2011-03-28
"The past tempts us, the present confuses us, the future frightens us. And
our lives slip away, moment by moment, lost in that vast, terrible in-between."
--Emperor Turhan, Centauri Republic
