Hello, I have ported the ppcboot 1.2.0 over to my hardware. I went into some problem when I wanted to run the TQM_860L linux (version 2.4.4). The kernel would not print anything after it was launched by the ppcboot. When I stopped it, it shows that it is engaged in some kind of timer loop. When I traced the function calls, I found that it never returns from the function <va_to_pte>, and I have no idea how does it end up in the timer loop from <va_to_pte>. The followings are what I have found thus far. Could anybody please shed some light into this. Thanks. Francis Yu
=> bootm 400000 ## Booting image at 00400000 ... Image Name: Linux-2.4.4 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 605331 Bytes = 591.1 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Current stack ends at 0x00F9BC18 => set upper limit to 0x00800000 ## cmdline at 0x007FFF00 ... 0x007FFF00 bd address = 0x00F9BFC4 memstart = 0x00000000 memsize = 0x01000000 flashstart = 0xFFE00000 flashsize = 0x00200000 flashoffset = 0x00000000 sramstart = 0x00000000 sramsize = 0x00000000 immr_base = 0xFA000000 bootflags = 0x00000001 intfreq = 50 MHz busfreq = 50 MHz ethaddr = 00:10:EC:00:1D:0B IP addr = 192.168.1.65 baudrate = 9600 bps No initrd ## Transferring control to Linux (at address 00000000) ... Nothing else was shown from this point on. I went in there to trace the Kernel and found the followings: Kernel started executing at 0x00000000, it went through some setups and then jumped to the following sequences: <start_kernel> ; <setup_arch>; <m8xx_setup_arch>; <m8xx_cpm_reset>; <va_to_pte>, passing 0x1b7000 as parameter; Inside <va_to_pte> $0000AB24 mr. R3,R3 (R3=0x1b7000) $0000AB28 blt 0xab34 $0000AB2C lwz R9,0x2c(R2) (R2=0x156020, R9=0) $0000AB30 b 0xab3c $0000AB34 lis R9,0x15 $0000AB38 addi R9,R9,0x5f9c $0000AB3C lwz R11,0xc(R9) (R11=0x7cdc3378 ???) $0000AB40 rlwinm R3,R3,0x0,0x0,0x13 (R3=0x1b7000) $0000AB44 rlwinm R9,R3,0xc,0x14,0x1d (R9=0) $0000AB48 add R0,R11,R9 (R0=0x7cdc3378) $0000AB4C cmpwi R0,0x0...... (Starting accessing non-existing memory here!!!) ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
