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Author SHA1 Message Date
ngiddings
979344e942 next_process() checks if a next process exists 
Panics if not
 2021-04-17 06:30:00 -05:00
ngiddings
b615a8d286 More process in initialize() 
Function now constructs kernel state and enters a process
 2021-04-17 06:27:55 -05:00
ngiddings
461194fdfd Fixed initialize_context() 
Function did not take 'popal' instruction into account when initializing stack
 2021-04-17 06:26:56 -05:00
ngiddings
a68a4dff11 Added new 'null pointer' status code 2021-04-17 06:26:03 -05:00
ngiddings
7dd19d0c2a Added constructors for heap and resource table 2021-04-17 06:25:46 -05:00
ngiddings
291ed65248 Fixed wrong pointer type in load_module() 
Kernel passed a pointer to its own state to get_free_resource_slot(),
causing its state to be corrupted.
next_process() also now loads the address space of the next process before entering it.
 2021-04-17 06:25:11 -05:00
ngiddings
2a5dcd4a0f Improved get_free_resource_slot() 
Table now tries to expand itself when no available slots are left
 2021-04-17 04:59:39 -05:00
ngiddings
a28e586139 Fixed missing return in free_page() 
Method would report "out of memory" when that was not the case
 2021-04-17 04:58:02 -05:00
ngiddings
7c0c5cd8ce Fixed calculation of kernel binary size in initialize() 2021-04-17 04:57:12 -05:00
ngiddings
55c5db056e Fixed crash in initialize_context() 
Function tried to dereference a physical address, causing page fault
 2021-04-17 04:56:22 -05:00
ngiddings
5c4a756176 Fixed fatal error while loading modules 
strcpy() was called with a char instead of a char*, obviously causing a crash
 2021-04-17 04:24:23 -05:00
Nathan Giddings
d0f9d026cc Merge pull request #5 from ngiddings/pre-alpha 
Pre alpha
 2021-04-17 03:46:34 -05:00
ngiddings
961139df9e Improved kernel memory usage 
Moved base linear address to 0xFF800000
Kernel only reserves the page frames it actually needs
Memory for multiboot2 headers is freed
Video memory and APIC registers are dynamically mapped into linear addresses
 2021-04-17 03:45:45 -05:00
ngiddings
b141582f40 Added very simple kernel memory allocator 2021-04-17 01:18:14 -05:00
ngiddings
b582c39ff8 Started work on process management 2021-04-17 01:00:28 -05:00
ngiddings
ce6371f0c3 Added ISR for preemption of processes 2021-04-17 00:59:15 -05:00
ngiddings
4bbe63819a Added page_table firld to process_t 2021-04-17 00:58:10 -05:00
ngiddings
db280f3fad Added new source files to Makefile.am 2021-04-17 00:57:50 -05:00
ngiddings
cb6d2681ef Started code to manage kernel resource table 2021-04-17 00:57:37 -05:00
ngiddings
9630d0a396 Added load_program() function 
Builds program image from ELF file in memory
Fixed multiple definition error caused by constant in elf.h:
moved contant to elf.c
 2021-04-17 00:56:44 -05:00
ngiddings
2d6fa0d163 Added functions to create and load process contexts 2021-04-17 00:55:05 -05:00
ngiddings
fdcdb9acab Updated virtual memory manager 
Added page flags
Added function current_address_space()
Fixed create_address_space()
Renamed some fields in page_table_entry_t to fit naming scheme
 2021-04-17 00:52:16 -05:00
ngiddings
6c047c6343 Remvoed unused dymamic memory allocator 2021-04-17 00:49:38 -05:00
ngiddings
8896c4313f Fixed glitch in trim_map() 
Entries were not modified properly; only removals worked correctly.
 2021-04-17 00:45:24 -05:00
ngiddings
6138766c49 Added sequence to remap PIC 
Wrote GDT code in C
Added routines to initialize GDT and IDT
 2021-04-16 01:45:40 -05:00
ngiddings
8e6589b472 Added some test code to setup a timer 2021-04-15 07:23:19 -05:00
ngiddings
3e73c7c0ac Fixed APIC register mapping 2021-04-15 07:22:58 -05:00
ngiddings
0c5d18ddc0 Added enum for timer interrupt vector 2021-04-15 07:22:26 -05:00
ngiddings
50fcaa2673 Added timer ISR 2021-04-15 07:22:01 -05:00
Nathan Giddings
d72c108f1b Merge pull request #4 from ngiddings/pre-alpha 
Pre alpha
 2021-04-15 05:56:49 -05:00
ngiddings
83abc11b09 Formatted header in README.md properly 2021-04-15 05:54:57 -05:00
Nathan Giddings
a42577d60e Merge pull request #3 from ngiddings/migrate-to-c 
Migrate to c
 2021-04-15 05:53:07 -05:00
ngiddings
3229f55164 Added some code in initialize() to test interrupts 2021-04-15 05:49:40 -05:00
ngiddings
c5e38801f3 Fixed the idt_info_t struct and lidt() 
Info was not loaded properly, causing crash
 2021-04-15 05:49:11 -05:00
ngiddings
923057ee1c Removed 'interrupt' attribute from isr_ap_start() 
Added message to division by 0 exception
 2021-04-15 04:55:28 -05:00
ngiddings
ac0e5261ba Implemented apic_send_ipi() 2021-04-15 04:51:57 -05:00
ngiddings
1e6b888515 Added msr.c to Makefile.am 2021-04-15 04:51:37 -05:00
ngiddings
d2617e4488 Wrote new ISR for AP entry 2021-04-15 04:51:23 -05:00
ngiddings
8eafcf899b Wrote some simple MSR code 2021-04-15 04:44:41 -05:00
ngiddings
c47a3dd73b Added apic.c to Makefile.am 2021-04-14 20:23:30 -05:00
ngiddings
8851243f19 Wrote empty definitions for some APIC functions 
Started x86 interrupt setup code
 2021-04-14 20:23:13 -05:00
ngiddings
3130b07fd1 Removed generic_isr() definition 2021-04-14 03:39:25 -05:00
ngiddings
48c042ca5f Added declaration for panic() function 2021-04-14 03:39:07 -05:00
ngiddings
507b0fa53e Renamed ISR functions to fit convention 2021-04-14 03:25:55 -05:00
ngiddings
eef1741e16 Added enum listing x86 exception codes 2021-04-14 03:25:21 -05:00
ngiddings
29544b0eb8 Moved interrupt code to separate file. 
Added new source file to Makefile.am
 2021-04-14 02:46:04 -05:00
ngiddings
4a8ca81a10 Started header for APIC structures 2021-04-14 02:25:57 -05:00
ngiddings
9f0867393f Some cleanup in quark_x86.c 2021-04-14 00:52:56 -05:00
ngiddings
6f625451ca Added new source files to Makefile.am 2021-04-14 00:52:29 -05:00
ngiddings
4c2ded8676 Fixed missing includes for multiboot2 files 2021-04-14 00:52:12 -05:00