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2022-01-21arch: i386: move non-critial files out of bootDanny Holman9-91/+52
Move all files not needed for the bootstrap process out of boot and into the main x86 source directory. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: fix coding style issueDanny Holman1-2/+2
Make the inline assembly calls consistent across different i386 files. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: add support for IRQs and system callsDanny Holman7-3/+61
Add support for rudementary system calls and IRQ interrupts. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: simplifiy GDT setupDanny Holman4-68/+176
Simplify the setup and definitions of GDT/TSS entries. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: simplify IDT setupDanny Holman5-31/+128
Simplify the interrupt descriptor table setup and frame assembly. Signed-off-by: Danny Holman <dholman@gymli.org>
2021-11-29arch: i386: add support for tab charactersDanny Holman1-0/+10
Add support for the tab character in the virtual terminal. Signed-off-by: Danny Holman <dholman@gymli.org>
2021-10-09arch: i386: rename the GDT array pointerDanny Holman1-7/+7
Rename the array/pointer to the GDT array in gdt.c pointer to be a bit clearer. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-10-09arch: i386: include more information in IDTDanny Holman4-73/+129
Include information about the current stack frame in the IDT handler(s). Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-09-28arch: i386: add PIC register supportDanny Holman2-0/+19
Add functions that let the OS read the internal state registers of the 8259 PIC. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-09-28arch: i386: fix IDT exception handlerDanny Holman4-45/+145
Fix the i386's general exception handler to actually work. Fix provided by Jon Sanderson (jjs295356@gmail.com). Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-09-28arch: i386: fix GDT segment mismatchDanny Holman1-1/+1
Fix a bug in which the size of the main GDT array and the actual number of descriptors are different values. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-09-28arch: i386: add support for 8259 PICDanny Holman6-18/+102
Add support for the 8259 programmable interrupt controller. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-08-30i386: create idt.c and isr.sDanny Holman4-1/+117
Create files that add IDT support for i386. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-08-27arch: i386: add ring-3 descriptors to the GDTDanny Holman1-1/+3
Add two ring-3 segment discriptors to the GDT during gdt_install. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-07-25arch: i386: surround GDT macros with parensDanny Holman1-15/+14
Add parenthesis around the GDT setup macros. This is done to prevent having to do it when using them. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-07-24arch: i386: add GDT setup routinesDanny Holman4-69/+98
Add a set of routines that setup the x86's global descriptor table. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-07-20arch: i386: move the kernel to high memoryDanny Holman3-13/+66
Move the start of the kernel image to the "higher half" of memory. This also enables paging.
2021-03-09Makefile: fix wrong -I directive to compilerDanny Holman1-2/+2
Fix a bug in which the architecture specific include directories are not properly included in the main Makefile. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-28i386: create terminal_scroll functionDanny Holman1-10/+25
Add support for scrolling the terminal at the end of the VGA buffer. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-25i386: add support for newlinesDanny Holman1-0/+7
Add support for the newline character in the TTY layer. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-24x86: reorganize the i386 directoryDanny Holman9-3/+73
Add structure to the internals of the x86 directory. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-20serial: add serial_writestring as a functionDanny Holman1-0/+7
Add a function in the serial interface that writes an entire string to the serial line. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-20serial: don't declare serial_init as staticDanny Holman1-1/+1
The function serial_init should not be declared as static. This function could change under a different architecture and should be defined with the target architecture. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-20i386: add serial port supportDanny Holman3-0/+57
Add support for serial communication in the i386 architecture. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-17arch: i386: add support for x86 processorsDanny Holman5-0/+142
Add support for 32-bit x86 processors, i.e. the 80386 and above. Signed-off-by: Danny Holman <dholman@gymli.xyz>
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