linux-kernel - 2.6.28 boot fails on Cyrix 6x86

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Date:	Tue, 13 Jan 2009 23:00:44 -0500
From:	zbigniew brzezinskix <zbigniewbrzezinskix@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.28 boot fails on Cyrix 6x86

Vanilla 2.6.28 boot fails on Cyrix 6x86 ... seems ok on 6x86MX.

tried:
     (X) 386
     (X) 486
     (X) 586/K5/5x86/6x86/6x86MX

cat /proc/cpuinfo
processor       : 0
vendor_id       : CyrixInstead
cpu family      : 5
model           : 2
model name      : 6x86 2x Core/Bus Clock
stepping        : 5
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : yes
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu cyrix_arr ds_cpl est cid
bogomips        : 120.01

BIOS EBDA/lowmem at: 00000000/000a0000
Linux version 2.6.28 (root@...48) (gcc version 4.3.2 (Debian
4.3.2-1.1) ) #1 Tue Jan 13 11:59:16 EST 2009
KERNEL supported cpus:
  Intel GenuineIntel
  AMD AuthenticAMD
  NSC Geode by NSC
  Cyrix CyrixInstead
  Centaur CentaurHauls
  Transmeta GenuineTMx86
  Transmeta TransmetaCPU
  UMC UMC UMC UMC
Enabling CPUID on Cyrix processor.
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 0000000003000000 (usable)
 BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
DMI not present or invalid.
last_pfn = 0x3000 max_arch_pfn = 0x100000
48MB LOWMEM available.
  mapped low ram: 0 - 03000000
  low ram: 00000000 - 03000000
  bootmap 00001000 - 00001600
(6 early reservations) ==> bootmem [0000000000 - 0003000000]
  #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
  #1 [0000100000 - 000036697c]    TEXT DATA BSS ==> [0000100000 - 000036697c]
  #2 [0000367000 - 0000369000]    INIT_PG_TABLE ==> [0000367000 - 0000369000]
  #3 [000009f000 - 0000100000]    BIOS reserved ==> [000009f000 - 0000100000]
  #4 [0000007000 - 0000012000]          PGTABLE ==> [0000007000 - 0000012000]
  #5 [0000001000 - 0000002000]          BOOTMAP ==> [0000001000 - 0000002000]
Zone PFN ranges:
  DMA      0x00000000 -> 0x00001000
  Normal   0x00001000 -> 0x00003000
Movable zone start PFN for each node
early_node_map[2] active PFN ranges
    0: 0x00000000 -> 0x000000a0
    0: 0x00000100 -> 0x00003000
Allocating PCI resources starting at 10000000 (gap: 3000000:fcff0000)
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 12096
Kernel command line: root=/dev/hda1 ro console=tty0 console=ttyS0,115200
Initializing CPU#0
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour VGA+ 80x25
console [tty0] enabled
console [ttyS0] enabled
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 45680k/49152k available (1557k kernel code, 3084k reserved,
602k data, 184k init, 0k highmem)
virtual kernel memory layout:
    fixmap  : 0xfffed000 - 0xfffff000   (  72 kB)
    vmalloc : 0xc3800000 - 0xfffeb000   ( 967 MB)
    lowmem  : 0xc0000000 - 0xc3000000   (  48 MB)
      .init : 0xc031e000 - 0xc034c000   ( 184 kB)
      .data : 0xc0285437 - 0xc031be58   ( 602 kB)
      .text : 0xc0100000 - 0xc0285437   (1557 kB)
Checking if this processor honours the WP bit even in supervisor mode...Ok.
Calibrating delay loop... 119.55 BogoMIPS (lpj=239104)
Mount-cache hash table entries: 512
Enabling CPUID on Cyrix processor.
Enabling CPUID on Cyrix processor.
CPU: Cyrix 6x86 2x Core/Bus Clock stepping 05
Checking 'hlt' instruction... OK.
invalid opcode: 0000 [#1]
last sysfs file:

Pid: 0, comm: swapper Not tainted (2.6.28 #1)
EIP: 0060:[<c03220c6>] EFLAGS: 00010203 CPU: 0
EIP is at stop_mce+0x0/0x19
EAX: 00000004 EBX: c03378c8 ECX: c031dfec EDX: 00000034
ESI: 00099800 EDI: c0316000 EBP: 0078d003 ESP: c031dfe4
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c031c000 task=c02f7300 task.ti=c031c000)
Stack:
 c0321865 c03220c4 00000000 c031e829 c03378c8 00000000 00000000
Call Trace:
 [<c0321865>] alternative_instructions+0xa/0x37
 [<c03220c4>] check_bugs+0xcd/0xcf
 [<c031e829>] start_kernel+0x1da/0x1e2
Code: 09 f4 f4 f4 f4 68 6c 97 2c c0 e8 32 10 f6 ff a0 40 8a 31 c0 5a
3c 06 b2 36 77 03 8d 50 30 88 15 b1 a0 2f c0 e8 97 f7 ff ff 58 c3 <0f>
20 e0 83 25 f0 00 35 c0 bf a3 f8 ba 33 c0 0f 20 e0 83 e0 bf
EIP: [<c03220c6>] stop_mce+0x0/0x19 SS:ESP 0068:c031dfe4
---[ end trace 4eaa2a86a8e2da22 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
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