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2024-05-27arch: i386: pass entry page directory to entry funcDanny Holman1-3/+2
Add a third argument to i386_entry. This argument is the bootstrap page directory. Pages can be temporarily mapped in during the initialization of the paging system. Signed-off-by: Danny Holman <dholman@gymli.org>
2024-03-28arch: i386: kernel: add mostly finished PFA and paging systemDanny Holman1-7/+11
Add the mostly finished physical memory allocator and expose its functions to the paging system. Signed-off-by: Danny Holman <dholman@gymli.org>
2024-02-24kernel: string: add a strcpy functionDanny Holman1-10/+6
Add an implmentation of strcpy. This function is used in several places in the kernel to copy strings between memory addresses. Signed-off-by: Danny Holman <dholman@gymli.org>
2024-02-24arch: i386: move jump_userspace to its own fileDanny Holman1-18/+1
Move the function that jumps to ring 3 to its own assembly file. Signed-off-by: Danny Holman <dholman@gymli.org>
2024-02-16arch: i386: move raw assembly calls to their own headerDanny Holman1-13/+0
Move simple assembly calls to their own header. All one or two line assembly calls should be defined in a single place. Signed-off-by: Danny Holman <dholman@gymli.org>
2023-11-26arch: i386: boot.s: define functions for page managementDanny Holman1-0/+27
Define the load_page_dir and enable_paging functions in assembly. This allows normal C code to initialize the CR3 register and control paging without using inline assembler. Signed-off-by: Danny Holman <dholman@gymli.org>
2023-11-26arch: i386: boot.s: move C entry point to fileDanny Holman1-10/+3
Move the initial C entry-point to its own file. Call all the i386 specific initialization routines from the new i386_entry function. Signed-off-by: Danny Holman <dholman@gymli.org>
2023-11-26arch: i386: boot: boot.sDanny Holman1-8/+4
Fix several small bugs in assembler. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: add support for IRQs and system callsDanny Holman1-0/+4
Add support for rudementary system calls and IRQ interrupts. Signed-off-by: Danny Holman <dholman@gymli.org>
2022-01-15arch: i386: simplifiy GDT setupDanny Holman1-5/+33
Simplify the setup and definitions of GDT/TSS entries. Signed-off-by: Danny Holman <dholman@gymli.org>
2021-09-28arch: i386: add support for 8259 PICDanny Holman1-1/+2
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 Holman1-1/+2
Create files that add IDT support for i386. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-07-24arch: i386: add GDT setup routinesDanny Holman1-0/+18
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 Holman1-6/+49
Move the start of the kernel image to the "higher half" of memory. This also enables paging.
2021-01-24x86: reorganize the i386 directoryDanny Holman1-0/+0
Add structure to the internals of the x86 directory. Signed-off-by: Danny Holman <dholman@gymli.xyz>
2021-01-17arch: i386: add support for x86 processorsDanny Holman1-0/+32
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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