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soc:2008:dverkamp:journal:start [2008/06/11 10:28] drv |
soc:2008:dverkamp:journal:start [2008/07/29 13:50] drv |
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| ===== Journal ===== | ===== Journal ===== | ||
| - | ==== Week 0 ==== | + | * [[ week10 | Week 10]] |
| - | ---- | + | * [[ week9 | Week 9 ]] |
| + | * [[ week8 | Week 8 ]] | ||
| + | * [[ week7 | Week 7 ]] | ||
| + | * [[ week6 | Week 6 ]] | ||
| + | * [[ week5 | Week 5 ]] | ||
| + | * [[ week4 | Week 4 ]] | ||
| + | * [[ week3 | Week 3 ]] | ||
| + | * [[ week2 | Week 2 ]] | ||
| + | * [[ week1 | Week 1 ]] | ||
| + | * [[ week0 | Week 0 ]] | ||
| - | === 19 May 2008 === | ||
| - | |||
| - | Journal created. | ||
| - | |||
| - | === 21 May 2008 === | ||
| - | |||
| - | * Image type detection by filename: check image->uri? | ||
| - | * arch/i386/README.i386: use libpm for COM32 transitions, librm for 16-bit COMBOOT | ||
| - | * hook_bios_interrupt -> hook the COMBOOT API ints (for 16-bit) with stubs that call back into gPXE? | ||
| - | * 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|}} | ||
