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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README-i386 | 74 | ||||
| -rw-r--r-- | doc/TODO-i386 | 39 |
2 files changed, 113 insertions, 0 deletions
diff --git a/doc/README-i386 b/doc/README-i386 new file mode 100644 index 0000000..99b3e19 --- /dev/null +++ b/doc/README-i386 @@ -0,0 +1,74 @@ +This is my attempt to port PPCBoot to the i386 platform. This +work was sponsored by my emplyer, Omicron Ceti AB. http://www.omicron.se + +It is currently capable of booting a linux bzImage from flash on +the AMD SC520 CDP platform. + +It was originally based on PPCBoot taken from the CVS October 28 2002. + +To compile: + +1) Unpack the source tree, either from the complete tarball or + from the virgin snapshot + the patch + +2) Configure the source + $ make sc520_cdp_comfig + $ make + +To use this code on the CDP: +1) Make a suitable kernel, I used 2.4.19 with the mtd-support updated + from the MTD CVS and a patch to allow root=/dev/mtdblock1 which I + included at the end of this file. + The following options in the MTD section might be useful: + + CONFIG_MTD_PHYSMAP=y + CONFIG_MTD_PHYSMAP_START=38100000 + CONFIG_MTD_PHYSMAP_LEN=7a0000 + CONFIG_MTD_PHYSMAP_BUSWIDTH=2 + + +2) Program it in to the CDP flashbank with remon + ppcboot.bin should be programmed att offset 0x7e000 and the kernel at + offset 0. If you want to use a jffs2 root file system (not included here), + it should be programmed to offset 0x100000. + + remon> z + remon> yi + remon> ns ppcboot.bin 7e0000 + remon> ns bzImage 0 + remon> ns image.jffs2 100000 + +3) Connect a terminal to the 25pin serial port at 9600bps, and start the CDP. + + remon> z + remon> g + +4) PPCboot should output some message and a prompt on the terminal, to + start the kernel issue the following command: + + BOOT> bootm + +5) The kernel should boot, and mount the root filesystem if present. + +We hope you find this stuff useful +Daniel Engström, Omicron Ceti AB, daniel@omicron.se + + + +--- linux-2.4.19-orig/init/do_mounts.c Sat Aug 3 02:39:46 2002 ++++ linux-2.4.19/init/do_mounts.c Mon Sep 23 16:21:33 2002 +@@ -224,6 +224,14 @@ + { "ftlc", 0x2c10 }, + { "ftld", 0x2c18 }, + { "mtdblock", 0x1f00 }, ++ { "mtdblock0", 0x1f00 }, ++ { "mtdblock1", 0x1f01 }, ++ { "mtdblock2", 0x1f02 }, ++ { "mtdblock3", 0x1f03 }, ++ { "mtdblock4", 0x1f04 }, ++ { "mtdblock5", 0x1f05 }, ++ { "mtdblock6", 0x1f06 }, ++ { "mtdblock7", 0x1f07 }, + { NULL, 0 } + }; + diff --git a/doc/TODO-i386 b/doc/TODO-i386 new file mode 100644 index 0000000..0969cbc --- /dev/null +++ b/doc/TODO-i386 @@ -0,0 +1,39 @@ +i386 port missing features: +* i386 cleaness (wbinvld is 486+ ... ) +* Pentium TSC timer/udelay +* setup the BIOS data area and BIOS equipment word to reflect machine config. +* Make reset work (from Linux and from the boot prompt) +* DMA, FDC, RTC, KBC initialization +* video card support (call BIOS to initialize, use helper routrine in BSP to shadow + video rom if on pci) and PC keyboard +* split of part of cpu/i386/interrupt.c to cpu/i385/entry.c? +* re-entry of protected mode from real mode, should be added to realmode_switch.S + (and used by INT 10h and INT 16h handlers for console I/O during early + linux boot...) +* missing functions in lib_i386 and cpu/i386 +* speaker beep interface + +i386 port bugs: +* IDE does not work + +SC520 missing features: +* Watchdog +* SC520 timer/udelay +* SC520 3rd PIC +* SC520 ICE serial +* SC520 MMCR reset + +SC520 CDP board support missing features: +* Synchronius serial port and seriel EEPROM +* environment in SEEP +* environment in flash +* environment in sram +* status LED ? +* flash driver + +SC520 CDP board support bugs: +* 0x680 LEDS dos not work for me +* is it possible to make both the internal serial ports and the + ports on the sio work at the same time? +* ali sio cio lines? +* On-borad ethernet does not work from Linux |