Hi Scott, By #defining DEBUG in setup-32.c and setting the following in my kernel config- CONFIG_PPC_EARLY_DEBUG=y CONFIG_PPC_EARLY_DEBUG_CPM=y CONFIG_PPC_EARLY_DEBUG_CPM_ADDR=0xf0001ff8
-I have been able to get the following boot messages: ## Booting kernel from Legacy Image at 00200000 ... Image Name: Linux-2.6.27-xxx Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1337583 Bytes = 1.3 MB Load Address: 00400000 Entry Point: 004006f0 Verifying Checksum ... OK Uncompressing Kernel Image ... OK Memory <- <0x0 0x2000000> (32MB) CPU clock-frequency <- 0x13ab6680 (330MHz) CPU timebase-frequency <- 0xfbc520 (17MHz) CPU bus-frequency <- 0x3ef1480 (66MHz) zImage starting: loaded at 0x00400000 (sp: 0x01f789c8) Allocating 0x2cb6d0 bytes for kernel ... gunzipping (0x00000000 <- 0x0040c000:0x006c8e60)...done 0x2aa19c bytes Linux/PowerPC load: root=/dev/mtdblock4 rw rootfstype=cramfs mtdparts=flash:256K(ub oot),128K(env1),128K(env2),1536K(linux1),6144K(root1),4096K(app1),1536K(linux2),614 4K(root2),4096K(app2),1536K(usr),-(usb) panic=1 console=ttyCPM0 mem=32M usbid=1 Finalizing device tree... flat tree at 0x40acb0 Probing machine type ... HPXRED ... match ! id mach(): done MMU:enter MMU:hw init MMU:mapin MMU:setio MMU:exit Using HPXRED machine description Linux version 2.6.27-xxx (d...@hellsforge) (gcc version 4.2.4) #19 PREEM PT Tue Jan 20 17:46:59 EST 2009 console [udbg0] enabled setup_arch: bootmem hpxred_setup_arch() No hpxred-bcsr in device tree arch: exit Top of RAM: 0x2000000, Total RAM: 0x2000000 Memory hole size: 0MB Zone PFN ranges: DMA 0x00000000 -> 0x00002000 Normal 0x00002000 -> 0x00002000 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0x00000000 -> 0x00002000 On node 0 totalpages: 8192 free_area_init_node: node 0, pgdat c02a1f7c, node_mem_map c02cc000 DMA zone: 8128 pages, LIFO batch:0 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128 Kernel command line: root=/dev/mtdblock4 rw rootfstype=cramfs mtdparts=flash:256K(u boot),128K(env1),128K(env2),1536K(linux1),6144K(root1),4096K(app1),1536K(linux2),61 44K(root2),4096K(app2),1536K(usr),-(usb) panic=1 console=ttyCPM0 mem=32M usbid=1 PID hash table entries: 128 (order: 7, 512 bytes) time_init: decrementer frequency = 16.500000 MHz time_init: processor frequency = 330.000000 MHz clocksource: timebase mult[f26c9b2] shift[22] registered clockevent: decrementer mult[439] shift[16] cpu[0] Console: colour dummy ΓΌ -at this point the board just reboots. Is there anything in the above logs that might signify why the reboot happened? I thought it might have been to do with: 'No hpxred-bcsr in device tree' If I add in a 'BCSR' node to my Device Tree I get the following: console [udbg0] enabled setup_arch: bootmem hpxred_setup_arch() Machine check in kernel mode. Caused by (from SRR1=41030): Transfer error ack signal Oops: Machine check, sig: 7 [#1] PREEMPT HPXRED NIP: c0273804 LR: c02737f4 CTR: 00000000 REGS: c02a5ee0 TRAP: 0200 Not tainted (2.6.27-800-OS-03050107) MSR: 00041030 <ME,IR,DR> CR: 22044028 XER: 20000000 TASK = c028c578[0] 'swapper' THREAD: c02a4000 GPR00: c02737f4 c02a5f90 c028c578 00000000 c000d260 00000000 c02ccffc 000002c0 GPR08: c02ccffc 7c3203a6 00000000 f45005a9 22044042 ffdfffff 01ff8000 00000000 GPR16: 01fed694 01ff56f0 00000000 00000000 00000000 00000000 00000000 01ff2cd0 GPR24: 00000000 00000000 40000000 00000000 006d4ff0 fdfff000 c02ac4cc c1fff970 NIP [c0273804] hpxred_setup_arch+0xf0/0x1dc LR [c02737f4] hpxred_setup_arch+0xe0/0x1dc Call Trace: [c02a5f90] [c02737f4] hpxred_setup_arch+0xe0/0x1dc (unreliable) [c02a5fb0] [c026f63c] setup_arch+0x130/0x168 [c02a5fc0] [c026c67c] start_kernel+0xa0/0x2c0 [c02a5ff0] [00003438] 0x3438 Instruction dump: 4bf03c3d 7c7f1b79 418200d4 38800000 4bd97425 7c7d1b78 7fe3fb78 4bd99491 2f9d0000 419e00d8 7c0004ac 813d0004 <0c090000> 4c00012c 3c00f4ff 6000ffff ---[ end trace 31fd0ba7d8756001 ]--- Kernel panic - not syncing: Attempted to kill the idle task! Rebooting in 180 seconds.. Which leads me to think BCSR is irrelevant for my board. What is BCSR? Here's the current Device Tree: /dts-v1/; / { model = "HPXRED"; compatible = "hpxred"; #address-cells = <1>; #size-cells = <1>; cpus { #address-cells = <1>; #size-cells = <0>; PowerPC,8...@0 { device_type = "cpu"; reg = <0x0>; d-cache-line-size = <32>; i-cache-line-size = <32>; d-cache-size = <16384>; i-cache-size = <16384>; timebase-frequency = <0>; bus-frequency = <0>; clock-frequency = <0>; }; }; memory { device_type = "memory"; reg = <0x0 0x0>; }; s...@f0000000 { #address-cells = <1>; #size-cells = <1>; device_type = "soc"; compatible = "fsl,mpc8272", "fsl,pq2-soc"; ranges = <0x0 0xf0000000 0x53000>; // Temporary -- will go away once kernel uses ranges for get_immrbase(). reg = <0xf0000000 0x53000>; c...@119c0 { #address-cells = <1>; #size-cells = <1>; #interrupt-cells = <2>; compatible = "fsl,mpc8272-cpm", "fsl,cpm2"; reg = <0x119c0 0x30>; ranges; mu...@0 { #address-cells = <1>; #size-cells = <1>; ranges = <0x0 0x0 0x10000>; d...@0 { compatible = "fsl,cpm-muram-data"; reg = <0x0 0x2000 0x9800 0x800>; }; }; b...@119f0 { compatible = "fsl,mpc8272-brg", "fsl,cpm2-brg", "fsl,cpm-brg"; reg = <0x119f0 0x10 0x115f0 0x10>; }; ser...@11a00 { device_type = "serial"; compatible = "fsl,mpc8272-scc-uart", "fsl,cpm2-scc-uart"; reg = <0x11a00 0x20 0x8000 0x100>; interrupts = <40 8>; interrupt-parent = <&PIC>; fsl,cpm-brg = <1>; fsl,cpm-command = <0x800000>; }; }; PIC: interrupt-control...@10c00 { #interrupt-cells = <2>; interrupt-controller; reg = <0x10c00 0x80>; compatible = "fsl,mpc8272-pic", "fsl,cpm2-pic"; }; }; chosen { linux,stdout-path = "/soc/cpm/ser...@11a00"; }; }; For BCSR, I tried adding the following immediately below the 'memory' node, just as in mpc8272ads.dts: local...@f0010100 { compatible = "fsl,mpc8272-localbus", "fsl,pq2-localbus"; #address-cells = <2>; #size-cells = <1>; reg = <0xf0010100 0x40>; ranges = <0x0 0x0 0xfe000000 0x2000000 0x1 0x0 0xf4500000 0x8000 0x3 0x0 0xf8200000 0x8000>; board-cont...@1,0 { reg = <0x1 0x0 0x20>; compatible = "fsl,mpc8272ads-bcsr"; }; }; Another possibility might be that I have set the following in the kernel- CONFIG_HZ=250 -this is in contrast to the above reported 330Mhz. When I had 2.6.14 working with an old version of u-boot, this was not a problem. Could it be causing me troubles now? In the "2.6.14+old u-boot" setup, I had also configured u-boot such that the memory was set to 64MB, but I told the kernel it was either 32MB or 64MB depending on what was physically available. This was so I could use the same u-boot for boards with either 32MB or 64MB. Is it still possible to do this for the new u-boot and kernel 2.6.27? _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev