Hi, I've been trying to run a custom board with mips32 custom cpu (Elvees multicore) with MIPS-I binaries, provided by Debian 'squeeze' release. So far, I've had "Kernel panic - not syncing: Caught Machine Check exception - caused by multiple matching entries in the TLB". With a buildroot fs built as mips32 the board runs just fine, with a buildroot fs built as mips-I I've had issues similar to debian MIPS-I fs. Have I been missing something very obvious? Is that a completely wrong settings for a MIPS32 cpu to run MIPS-I binaries? I've checked Malta's Cobalt's and Broadcom's kernel configs from Debian *.deb and looks my config settings are plausible, I mean I don't need to attempt to degrade cpu configuration to CPU_R3000 or do similar weird things? Nothing obviously wrong in my kernel config for a kernel intended to run MIPS-I binaries? My kernel config contains the next definitions: CONFIG_MULTICORE=y CONFIG_CPU_MIPS32_R1=y CONFIG_SYS_HAS_CPU_MIPS32_R1=y CONFIG_CPU_MIPS32=y CONFIG_CPU_MIPSR1=y CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y CONFIG_32BIT=y CONFIG_PAGE_SIZE_4KB=y #CONFIG_PAGE_SIZE_16KB is not set # CONFIG_PAGE_SIZE_64KB is not set CONFIG_MIPS_MT_DISABLED=y # CONFIG_MIPS_MT_SMP is not set CONFIG_SYS_SUPPORTS_MULTITHREADING=y # CONFIG_MIPS_VPE_LOADER is not set # CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set CONFIG_CPU_HAS_SYNC=y CONFIG_GENERIC_HARDIRQS=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_CPU_SUPPORTS_HIGHMEM=y CONFIG_ARCH_FLATMEM_ENABLE=y CONFIG_ARCH_POPULATES_NODE_MAP=y CONFIG_SELECT_MEMORY_MODEL=y CONFIG_FLATMEM_MANUAL=y CONFIG_FLATMEM=y CONFIG_FLAT_NODE_MEM_MAP=y CONFIG_PAGEFLAGS_EXTENDED=y CONFIG_SPLIT_PTLOCK_CPUS=4 # CONFIG_PHYS_ADDR_T_64BIT is not set CONFIG_ZONE_DMA_FLAG=0 CONFIG_VIRT_TO_BUS=y Console output: [ 0.000000] Linux version 2.6.36-multicore (koivu@koivu) (gcc version 4.3.5 (Buildroot 2 011.05) ) #5 Fri Jul 6 22:55:20 MSK 2012 [ 0.000000] CPU revision is: 000a2001 (Elvees Multicore) [ 0.000000] FPU revision is: 00030001 [ 0.000000] MIPS clk frequency: 290 MHz, frequency multiplier: 58 [ 0.000000] MPORT clk frequency: 100 MHz, frequency multiplier: 20 [ 0.000000] Multicore specific initialisation complete [ 0.000000] Determined physical RAM map: [ 0.000000] memory: 04000000 @ 00000000 (usable) [ 0.000000] Initrd not found or empty - disabling initrd [ 0.000000] Zone PFN ranges: [ 0.000000] Normal 0x00000000 -> 0x00004000 [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[1] active PFN ranges [ 0.000000] 0: 0x00000000 -> 0x00004000 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16240 [ 0.000000] Kernel command line: console=ttyS0,115200N8 root=/dev/ram0 [ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes) [ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) [ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) [ 0.000000] Memory: 60224k/65536k available (1349k kernel code, 5312k reserved, 214k dat a, 2928k init, 0k highmem) [ 0.000000] NR_IRQS:105 [ 0.000000] console [ttyS0] enabled [ 0.004000] Calibrating delay loop... 10.49 BogoMIPS (lpj=20992) [ 0.080000] pid_max: default: 32768 minimum: 301 [ 0.084000] Mount-cache hash table entries: 512 [ 0.160000] Multicore AMBA bus registered [ 0.176000] bio: create slab <bio-0> at 0 [ 0.184000] Switching to clocksource MIPS [ 4.436000] msgmni has been set to 117 [ 4.444000] io scheduler noop registered [ 4.448000] io scheduler deadline registered (default) [ 7.944000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 7.964000] serial8250: ttyS0 at MMIO 0xb82f3000 (irq = 13) is a 16550 [ 7.976000] serial8250: ttyS1 at MMIO 0xb82f3800 (irq = 14) is a 16550 [ 8.536000] brd: module loaded [ 8.804000] loop: module loaded [ 9.028000] Freeing unused kernel memory: 2928k freed Initializing random number generator... done. Please press Enter to activate this console. [ 12.560000] Got mcheck at 0044f6a8 [ 12.560000] Cpu 0 [ 12.560000] $ 0 : 00000000 3000fc00 00000000 004eb02c [ 12.560000] $ 4 : 00000001 00000004 004eb02c 00000000 [ 12.560000] $ 8 : 00000000 00000000 8002b6c8 fffffffc [ 12.560000] $12 : fffffffc 00000807 00000800 0044952c [ 12.560000] $16 : 004c1958 0000005c 7ffdf3e8 7ffdf440 [ 12.560000] $20 : 00000001 004f0000 ffffffff 004f0000 [ 12.560000] $24 : 00000163 004eb02c [ 12.560000] $28 : 004f0df0 7ffdf240 004c1934 0044f090 [ 12.560000] Hi : 0000025b [ 12.560000] Lo : 00035a4f [ 12.560000] epc : 0044f6a8 0x44f6a8 [ 12.560000] Not tainted [ 12.560000] ra : 0044f090 0x44f090 [ 12.560000] Status: 2020fc13 USER EXL IE [ 12.560000] Cause : 10000060 [ 12.560000] PrId : 000a2001 (Elvees Multicore) [ 12.560000] Index : 5 [ 12.560000] Pagemask: 0 [ 12.560000] EntryHi : 0044e046 [ 12.560000] EntryLo0: 00000000 [ 12.560000] EntryLo1: 000f7c42 [ 12.560000] [ 12.560000] Index: 0 pgmask=4kb va=2ac38000 asid=46 [ 12.560000] [pa=03eab000 c=3 d=0 v=1 g=0] [pa=03eac000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 1 pgmask=4kb va=00448000 asid=46 [ 12.560000] [pa=00000000 c=3 d=0 v=0 g=0] [pa=03deb000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 2 pgmask=4kb va=2ac3c000 asid=46 [ 12.560000] [pa=03eaf000 c=3 d=0 v=1 g=0] [pa=03eb0000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 3 pgmask=4kb va=2ac3a000 asid=46 [ 12.560000] [pa=03ead000 c=3 d=0 v=1 g=0] [pa=03eae000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 4 pgmask=4kb va=00444000 asid=46 [ 12.560000] [pa=03de6000 c=3 d=0 v=1 g=0] [pa=03de7000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 5 pgmask=4kb va=00446000 asid=46 [ 12.560000] [pa=03de8000 c=3 d=0 v=1 g=0] [pa=00000000 c=3 d=0 v=0 g=0] [ 12.560000] Index: 6 pgmask=4kb va=00440000 asid=46 [ 12.560000] [pa=00000000 c=3 d=0 v=0 g=0] [pa=03de3000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 7 pgmask=4kb va=004ec000 asid=46 [ 12.560000] [pa=00454000 c=3 d=1 v=1 g=0] [pa=00441000 c=3 d=1 v=1 g=0] [ 12.560000] Index: 8 pgmask=4kb va=004c0000 asid=46 [ 12.560000] [pa=03e62000 c=3 d=0 v=1 g=0] [pa=03e63000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 9 pgmask=4kb va=0044e000 asid=46 [ 12.560000] [pa=00000000 c=3 d=0 v=0 g=0] [pa=03df1000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 10 pgmask=4kb va=2ac74000 asid=46 [ 12.560000] [pa=03ee7000 c=3 d=0 v=1 g=0] [pa=03ee8000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 11 pgmask=4kb va=7ffde000 asid=46 [ 12.560000] [pa=00458000 c=3 d=1 v=1 g=0] [pa=0109d000 c=3 d=1 v=1 g=0] [ 12.560000] Index: 12 pgmask=4kb va=0040a000 asid=46 [ 12.560000] [pa=03dac000 c=3 d=0 v=1 g=0] [pa=00000000 c=3 d=0 v=0 g=0] [ 12.560000] Index: 13 pgmask=4kb va=2ac80000 asid=46 [ 12.560000] [pa=00000000 c=3 d=0 v=0 g=0] [pa=03ef4000 c=3 d=0 v=1 g=0] [ 12.560000] Index: 14 pgmask=4kb va=004ea000 asid=46 [ 12.560000] [pa=00000000 c=3 d=0 v=0 g=0] [pa=0049c000 c=3 d=1 v=1 g=0] [ 12.560000] Index: 15 pgmask=4kb va=004e8000 asid=46 [ 12.560000] [pa=00450000 c=3 d=1 v=1 g=0] [pa=0109f000 c=3 d=1 v=1 g=0] [ 12.560000] [ 12.560000] [ 12.560000] Code: afa00104 10000235 00000000 <8f85804c> 00000000 8ca50000 00000000 afa50128 8fb90128 [ 12.560000] Kernel panic - not syncing: Caught Machine Check exception - caused by multiple matching entries in the TLB. TIA, Yuri
