soc:2008:dverkamp:journal:start - Etherboot/gPXE Wiki

====== Differences ====== This shows you the differences between two versions of the page.

--- soc:2008:dverkamp:journal:start [2008/06/16 13:56]
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+++ soc:2008:dverkamp:journal:start [2008/08/15 12:06] (current)
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 ===== Journal =====
-==== Week 0 ====
+  * [[ week12 | Week 12]]
-----
+  * [[ week10 | Week 10]]
+  * [[ week9 | Week 9 ]]
-=== 19 May 2008 ===
+  * [[ week8 | Week 8 ]]
+  * [[ week7 | Week 7 ]]
-Journal created.
+  * [[ week6 | Week 6 ]]
+  * [[ week5 | Week 5 ]]
-=== 21 May 2008 ===
+  * [[ week4 | Week 4 ]]
+  * [[ week3 | Week 3 ]]
-  * Image type detection by filename: check image->uri?
+  * [[ week2 | Week 2 ]]
-  * arch/i386/README.i386: use libpm for COM32 transitions, librm for 16-bit COMBOOT
+  * [[ week1 | Week 1 ]]
-  * hook_bios_interrupt -> hook the COMBOOT API ints (for 16-bit) with stubs that call back into gPXE?
+  * [[ week0 | Week 0 ]]
-  * REAL_CODE, PHYS_CODE in inline asm
-  * memcpy_user, real_to_user
-  * i386_all_regs, regs_t (ordered like PUSHA) types
-  * _virt_to_phys to switch from etherboot-style virtual address space to flat physical addresses (COM32)
-  * basemem_packet (BASEMEM_PACKET_LEN = 1514)
-  * arch/i386/include/virtaddr.h: VIRTUAL/PHYSICAL/REAL_CS/DS
-  * install_rm_callback_interface
-  * Split COMBOOT and C32 or use the same image type for both?
-== TODO ==
-  * Check current PXE API support
-  * Find out how to add config option for image type
-=== 23 May 2008 ===
-  * Had meeting with mdc and mcb30; discussed basic architecture for COMBOOT support
-  * Discovered how near RET from 16-bit COMBOOT works - INT 20h at byte 0 of segment (documented as part of PSP in COMBOOT spec)
-  * Sample hook_bios_interrupt/call_prot code from mcb30; see [[soc/2008/dverkamp/notes/hook_bios_interrupt]]
-  * Finished basic 16-bit COMBOOT loading and INT 20h and INT 21h AH=02h hooks {{:soc:2008:dverkamp:journal:dverkamp-may-23-2008.png|}}
-=== 24 May 2008 ===
-  * Figured out and fixed why RET wasn't working - top of stack wasn't being cleared
-  * Cleaned up and committed beginnings of COMBOOT API
-==== Week 1 ====
-----
-=== 25-26 May 2008 ===
-  * Allow COMBOOT images to return via INT 20h - save the (far) return address during exec, then save the old stack address in the PSP, so in INT 20h handler, just change back to old stack and do RETF
-  * Handle other termination API functions (INT 21h, AH=00h and AH=4Ch) - call INT 20h handler
-  * Handle INT 21h, AH=09h (Write DOS String to Console) and AH=30h (Check DOS Version)
-=== 29 May 2008 ===
-  * Add beginning of SYSLINUX AX=0001h (get version) and AX=0003h (run command)
-  * Run command function was looping on itself (comboot executable ran again when "boot" executed?), so did similar "unregister image while running" like image/script.c
-=== 30 May 2008 ===
-  * Meeting with mdc
-==== Week 2 ====
-----
-=== 02 June 2008 ===
-  * Message to soc-mentors discussing implementation details; learned how to get available memory, test if key is hit, call protected-mode code with flat-memory setup, etc.
-  * Finish COMBOOT API "Get Version" - return address of version and copyright strings [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=4f02100d29583bd9586e4a832eb910f9192d304b | 4f02100d29583bd9586e4a832eb910f9192d304b ]]
-  * Fill in correct value for available memory field in PSP header [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commit;h=c07e41f20e6ef9b89e290733d5c06a8fcadfb0e1 | c07e41f20e6ef9b89e290733d5c06a8fcadfb0e1 ]]
-=== 03 June 2008 ===
-  * Initial try at COM32 support; helper functions are not implemented yet, so nothing really works [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=6d18cc20c85e7a1a195705d1da6bd67c0917138f | 6d18cc20c85e7a1a195705d1da6bd67c0917138f ]]
-  * Wrappers for COM32 helper functions to switch between flat mapping used by COM32 and the virtual address space used by gPXE (COM32 still mainly untested) [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=d5e92f83c8fba51e0a2c803b9204bae7d86c9cd8 | d5e92f83c8fba51e0a2c803b9204bae7d86c9cd8 ]]
-  * Some small fixes to COMBOOT (always load the image in the same place, and use that fact to locate the PSP even if the image changes segment registers) [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=245547103ed490bfc380d94ea7f7634a6e46f11a | 245547103ed490bfc380d94ea7f7634a6e46f11a ]]
-TODO:
-  * Find correct end of available memory value for ESP before executing COM32 images
-  * Finish helper functions (copy between registers and com32sys_t structs)
-=== 04 June 2008 ===
-   * Find end of memory value from walking memmap and pass it to COM32 programs [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=164672592936bb3026b4ada3113b3e66f0e6f51c | 164672592936bb3026b4ada3113b3e66f0e6f51c ]]
-=== 05 June 2008 ===
-   * Fix a lot of small things related to COM32; now ''hello.c32'' and ''hello2.c32'' run correctly!
-[[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=3876fad11e9f4ba3d8319eaadffce7c30aaaeaa6 | 3876fad11e9f4ba3d8319eaadffce7c30aaaeaa6 ]], [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=bcb1ffca2899973f73381d36cdae88e7c13c0881 | bcb1ffca2899973f73381d36cdae88e7c13c0881 ]], [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=32030bd5f16208b01441eed8ef0d101362770ef0 | 32030bd5f16208b01441eed8ef0d101362770ef0 ]], [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=8f4adae9cb357b8f88beea16439fa2afdcc127d3 | 8f4adae9cb357b8f88beea16439fa2afdcc127d3 ]], [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=f7a3b956e3eaa5689da98721d1bbb55910b5d6c1 | f7a3b956e3eaa5689da98721d1bbb55910b5d6c1 ]]
-{{:soc:2008:dverkamp:journal:jun-05-2008.png|}}
-  * Only the intcall helper is implemented; the farcall and cfarcall helper functions are still unimplemented, but should be relatively easy now that intcall is working
-==== Week 3 ====
-----
-=== 10 June 2008 ===
-  * Implement file I/O functions (open, read, close) based on gPXE's posix_io support [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=dcf8448c1e922892ee8dc4cf7a238eaebca1a5df | dcf8448c1e922892ee8dc4cf7a238eaebca1a5df ]]
-=== 11 June 2008 ===
-  * Finally debugged why my VGA test case (a 256-byte demo, [[ http://pouet.net/prod.php?which=3397 | tube by 3SC ]]) wasn't working - it was assuming that registers were 0, and I hadn't been clearing them; after taking care of that, it works fine in bochs, qemu, and real hardware: [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=169e9975ba0aea887bf5515f9bbe32466bf3b5e0 | 169e9975ba0aea887bf5515f9bbe32466bf3b5e0 ]]
-{{:soc:2008:dverkamp:journal:jun-11-2008.png|}}
-  * Fixed a bunch of small things in com32_call.c, after which basic file I/O (filetest.c32) works [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=d645d491cf48d7ef48566057b9b8ad6c5418b5d9 | d645d491cf48d7ef48566057b9b8ad6c5418b5d9 ]]
-{{:soc:2008:dverkamp:journal:jun-11-2008.fileio.png| filetest.c32 reading a file over HTTP with a relative filename}}
-  * Implement more INT 22h functions (AX = 0005h, AX = 0007h, AX = 0013h, AX = 0015h) [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=068eb73795d962cc70336a8159e6e91ecbd5cb68 | 068eb73795d962cc70336a8159e6e91ecbd5cb68 ]]
-  * Implement "Resolve hostname" function; resolv.c32 now works [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=01fa277122c8ee33e26a35b7ef890e57b8b485e3 | 01fa277122c8ee33e26a35b7ef890e57b8b485e3 ]]
-=== 12 June 2008 ===
-  * Map Enter key to 0x0D instead of 0x0A; now fancyhello.c32 works [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=d5f9318b8570cf3c489e4d3f8dfe1955cb837024 | d5f9318b8570cf3c489e4d3f8dfe1955cb837024 ]]
-  * Rebased comboot work on top of current upstream gPXE tree and pushed to [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=shortlog;h=comboot-merge | comboot-merge branch ]]
-==== Week 4 ====
-----
-=== 16 June 2008 ===
-  * Implemented "Call PXE Stack" (INT 22h AX=0009h) [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=e55e13db55ad26d9f62e72ff3bc2a77006d74b40 | e55e13db55ad26d9f62e72ff3bc2a77006d74b40 ]] (untested!)
-  * Implemented "Write Character to Serial Port" (INT 21h AH=04h) using stefanha's serial changes [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=dac1de178042d2ffdacb772d265033cfc24c2441 | dac1de178042d2ffdacb772d265033cfc24c2441 ]] (untested!)
-  * Implemented "Cleanup, shuffle and boot" (INT 22h AX=0012h) and related function "Maximum number of shuffle descriptors" (AX=0011h) [[ http://git.etherboot.org/?p=people/dverkamp/gpxe.git;a=commitdiff;h=9a4e36722ceaf02d8360c37401af4c1716ab2334 | 9a4e36722ceaf02d8360c37401af4c1716ab2334 ]] (untested!)

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