* Patch by Daniel Engström, 13 Nov 2002:

  Add support for i386 architecture and AMD SC520 board

* Patch by Pierre Aubert, 12 Nov 2002:
  Add support for DOS filesystem and booting from DOS floppy disk

2 files changed, 113 insertions, 0 deletions

diff --git a/doc/README-i386 b/doc/README-i386
new file mode 100644
index 0000000000..99b3e198c4
--- /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 0000000000..0969cbcd58
--- /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