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I don't even know what to write at this point

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This commit is contained in:
Jozef Nagy 2025-03-10 17:10:35 +01:00
parent df0ebbbbcd
commit 72a46bc7ce
Signed by untrusted user who does not match committer: crz
GPG key ID: 459A4811CEAC7068
12 changed files with 235 additions and 96 deletions
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boot/common/proto/aurix.c Normal file
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/*********************************************************************************/
/* Module Name: aurix.c */
/* Project: AurixOS */
/* */
/* Copyright (c) 2024-2025 Jozef Nagy */
/* */
/* This source is subject to the MIT License. */
/* See License.txt in the root of this repository. */
/* All other rights reserved. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
/* SOFTWARE. */
/*********************************************************************************/
#include <proto/aurix.h>
#include <loader/elf.h>
#include <mm/mman.h>
#include <mm/vmm.h>
#include <vfs/vfs.h>
#include <print.h>
extern __attribute__((noreturn)) void aurix_handoff(void *pagemap, void *stack, uint64_t entry, void *params);
extern char _aurix_handoff_start[], _aurix_handoff_end[];
void aurix_load(char *kernel)
{
// read kernel -> test read
char *kbuf = NULL;
vfs_read(kernel, &kbuf);
// TODO: Do something with the kernel :p
pagetable *pm = create_pagemap();
if (!pm) {
debug("aurix_load(): Failed to create kernel pagemap! Halting...\n");
// TODO: Halt
while (1);
}
map_pages(pm, (uintptr_t)_aurix_handoff_start, (uintptr_t)_aurix_handoff_start, (uint64_t)_aurix_handoff_end - (uint64_t)_aurix_handoff_start, VMM_PRESENT | VMM_USER | VMM_WRITABLE);
void *stack = mem_alloc(16*1024); // 16 KiB stack should be well more than enough
if (!stack) {
debug("aurix_load(): Failed to allocate stack! Halting...\n");
while (1);
}
void *kernel_entry = (void *)elf_load(kbuf, pm);
if (!kernel_entry) {
debug("aurix_load(): Failed to load '%s'! Halting...\n", kernel);
mem_free(kbuf);
while (1);
}
void *parameters = NULL;
debug("aurix_load(): Handoff state: pm=0x%llx, stack=0x%llx, kernel_entry=0x%llx\n", pm, stack, kernel_entry);
aurix_handoff(pm, (void *)((uint8_t)stack - 16*1024), (uint64_t)kernel_entry, (void *)parameters);
// __asm__ volatile("movq %[pml4], %%cr3\n" :: [pml4]"r"(pm) : "memory");
// __asm__ volatile("callq *%[entry]\n"
// :: [entry]"r"(kernel_entry));
}