256 lines
8.5 KiB
C
256 lines
8.5 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
|
|
*
|
|
* The ToAruOS kernel is released under the terms of the
|
|
* University of Illinois / NCSA License.
|
|
*
|
|
* Copyright (C) 2011-2014 Kevin Lange. All rights reserved.
|
|
* Copyright (C) 2012 Markus Schober
|
|
* Copyright (C) 2014 Lioncash
|
|
*
|
|
* Dedicated to the memory of
|
|
* Dennis Ritchie
|
|
* 1941-2011
|
|
*
|
|
* Developed by: ToAruOS Kernel Development Team
|
|
* http://github.com/klange/osdev
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal with the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimers.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimers in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the names of the ToAruOS Kernel Development Team, Kevin Lange,
|
|
* nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this Software without specific prior
|
|
* written permission.
|
|
*
|
|
* 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
|
|
* CONTRIBUTORS 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
|
|
* WITH THE SOFTWARE.
|
|
*/
|
|
|
|
#include <kernel/system.h>
|
|
#include <kernel/boot.h>
|
|
#include <kernel/ext2.h>
|
|
#include <kernel/fs.h>
|
|
#include <kernel/logging.h>
|
|
#include <kernel/process.h>
|
|
#include <kernel/shm.h>
|
|
#include <kernel/args.h>
|
|
#include <kernel/module.h>
|
|
|
|
uintptr_t initial_esp = 0;
|
|
|
|
fs_node_t * ramdisk_mount(uintptr_t, size_t);
|
|
|
|
#ifdef EARLY_BOOT_LOG
|
|
#define EARLY_LOG_DEVICE 0x3F8
|
|
static uint32_t _early_log_write(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
|
|
for (unsigned int i = 0; i < size; ++i) {
|
|
outportb(EARLY_LOG_DEVICE, buffer[i]);
|
|
}
|
|
return size;
|
|
}
|
|
fs_node_t _early_log = { .write = &_early_log_write };
|
|
#define ENABLE_EARLY_BOOT_LOG(level) do { debug_file = &_early_log; debug_level = (level); } while (0)
|
|
#define DISABLE_EARLY_BOOT_LOG() do { debug_file = NULL; debug_level = NOTICE; } while (0)
|
|
#else
|
|
#define ENABLE_EARLY_BOOT_LOG(level)
|
|
#define DISABLE_EARLY_BOOT_LOG()
|
|
#endif
|
|
|
|
struct pack_header {
|
|
char head[4];
|
|
uint32_t region_size;
|
|
};
|
|
|
|
/*
|
|
* multiboot i386 (pc) kernel entry point
|
|
*/
|
|
int kmain(struct multiboot *mboot, uint32_t mboot_mag, uintptr_t esp) {
|
|
initial_esp = esp;
|
|
extern char * cmdline;
|
|
|
|
uint32_t mboot_mods_count = 0;
|
|
mboot_mod_t * mboot_mods = NULL;
|
|
mboot_ptr = mboot;
|
|
|
|
ENABLE_EARLY_BOOT_LOG(0);
|
|
|
|
assert(mboot_mag == MULTIBOOT_EAX_MAGIC && "Didn't boot with multiboot, not sure how we got here.");
|
|
debug_print(NOTICE, "Processing Multiboot information.");
|
|
|
|
/* Initialize core modules */
|
|
gdt_install(); /* Global descriptor table */
|
|
idt_install(); /* IDT */
|
|
isrs_install(); /* Interrupt service requests */
|
|
irq_install(); /* Hardware interrupt requests */
|
|
|
|
if (mboot_ptr->flags & (1 << 3)) {
|
|
debug_print(NOTICE, "There %s %d module%s starting at 0x%x.", mboot_ptr->mods_count == 1 ? "is" : "are", mboot_ptr->mods_count, mboot_ptr->mods_count == 1 ? "" : "s", mboot_ptr->mods_addr);
|
|
debug_print(NOTICE, "Current kernel heap start point would be 0x%x.", &end);
|
|
if (mboot_ptr->mods_count > 0) {
|
|
uintptr_t last_mod = (uintptr_t)&end;
|
|
uint32_t i;
|
|
mboot_mods = (mboot_mod_t *)mboot_ptr->mods_addr;
|
|
mboot_mods_count = mboot_ptr->mods_count;
|
|
for (i = 0; i < mboot_ptr->mods_count; ++i ) {
|
|
mboot_mod_t * mod = &mboot_mods[i];
|
|
uint32_t module_start = mod->mod_start;
|
|
uint32_t module_end = mod->mod_end;
|
|
if ((uintptr_t)mod + sizeof(mboot_mod_t) > last_mod) {
|
|
/* Just in case some silly person put this *behind* the modules... */
|
|
last_mod = (uintptr_t)mod + sizeof(mboot_mod_t);
|
|
}
|
|
debug_print(NOTICE, "Module %d is at 0x%x:0x%x", i, module_start, module_end);
|
|
if (last_mod < module_end) {
|
|
last_mod = module_end;
|
|
}
|
|
}
|
|
debug_print(NOTICE, "Moving kernel heap start to 0x%x", last_mod);
|
|
kmalloc_startat(last_mod);
|
|
}
|
|
}
|
|
|
|
paging_install(mboot_ptr->mem_upper + mboot_ptr->mem_lower);
|
|
if (mboot_ptr->flags & (1 << 6)) {
|
|
debug_print(NOTICE, "Parsing memory map.");
|
|
mboot_memmap_t * mmap = (void *)mboot_ptr->mmap_addr;
|
|
while ((uintptr_t)mmap < mboot_ptr->mmap_addr + mboot_ptr->mmap_length) {
|
|
if (mmap->type == 2) {
|
|
for (unsigned long long int i = 0; i < mmap->length; i += 0x1000) {
|
|
if (mmap->base_addr + i > 0xFFFFFFFF) break; /* xxx */
|
|
debug_print(INFO, "Marking 0x%x", (uint32_t)(mmap->base_addr + i));
|
|
paging_mark_system((mmap->base_addr + i) & 0xFFFFF000);
|
|
}
|
|
}
|
|
mmap = (mboot_memmap_t *) ((uintptr_t)mmap + mmap->size + sizeof(uintptr_t));
|
|
}
|
|
}
|
|
paging_finalize();
|
|
|
|
{
|
|
char cmdline_[1024];
|
|
|
|
size_t len = strlen((char *)mboot_ptr->cmdline);
|
|
memmove(cmdline_, (char *)mboot_ptr->cmdline, len + 1);
|
|
|
|
/* Relocate the command line */
|
|
cmdline = (char *)kmalloc(len + 1);
|
|
memcpy(cmdline, cmdline_, len + 1);
|
|
}
|
|
|
|
/* Memory management */
|
|
heap_install(); /* Kernel heap */
|
|
|
|
if (cmdline) {
|
|
args_parse(cmdline);
|
|
}
|
|
|
|
vfs_install();
|
|
tasking_install(); /* Multi-tasking */
|
|
timer_install(); /* PIC driver */
|
|
fpu_install(); /* FPU/SSE magic */
|
|
syscalls_install(); /* Install the system calls */
|
|
shm_install(); /* Install shared memory */
|
|
modules_install(); /* Modules! */
|
|
|
|
DISABLE_EARLY_BOOT_LOG();
|
|
|
|
/* Load modules from bootloader */
|
|
debug_print(NOTICE, "%d modules to load", mboot_mods_count);
|
|
for (unsigned int i = 0; i < mboot_ptr->mods_count; ++i ) {
|
|
mboot_mod_t * mod = &mboot_mods[i];
|
|
uint32_t module_start = mod->mod_start;
|
|
uint32_t module_end = mod->mod_end;
|
|
size_t module_size = module_end - module_start;
|
|
|
|
int check_result = module_quickcheck((void *)module_start);
|
|
if (check_result == 1) {
|
|
debug_print(NOTICE, "Loading a module: 0x%x:0x%x", module_start, module_end);
|
|
module_data_t * mod_info = (module_data_t *)module_load_direct((void *)(module_start), module_size);
|
|
if (mod_info) {
|
|
debug_print(NOTICE, "Loaded: %s", mod_info->mod_info->name);
|
|
}
|
|
} else if (check_result == 2) {
|
|
/* Mod pack */
|
|
debug_print(NOTICE, "Loading modpack. %x", module_start);
|
|
struct pack_header * pack_header = (struct pack_header *)module_start;
|
|
while (pack_header->region_size) {
|
|
void * start = (void *)((uintptr_t)pack_header + 4096);
|
|
int result = module_quickcheck(start);
|
|
if (result != 1) {
|
|
debug_print(WARNING, "Not actually a module?! %x", start);
|
|
}
|
|
module_data_t * mod_info = (module_data_t *)module_load_direct(start, pack_header->region_size);
|
|
if (mod_info) {
|
|
debug_print(NOTICE, "Loaded: %s", mod_info->mod_info->name);
|
|
}
|
|
pack_header = (struct pack_header *)((uintptr_t)start + pack_header->region_size);
|
|
}
|
|
debug_print(NOTICE, "Done with modpack.");
|
|
} else {
|
|
debug_print(NOTICE, "Loading ramdisk: 0x%x:0x%x", module_start, module_end);
|
|
ramdisk_mount(module_start, module_size);
|
|
}
|
|
}
|
|
|
|
/* Map /dev to a device mapper */
|
|
map_vfs_directory("/dev");
|
|
|
|
if (args_present("root")) {
|
|
char * root_type = "ext2";
|
|
if (args_present("root_type")) {
|
|
root_type = args_value("root_type");
|
|
}
|
|
vfs_mount_type(root_type, args_value("root"), "/");
|
|
}
|
|
|
|
if (args_present("start")) {
|
|
char * c = args_value("start");
|
|
if (!c) {
|
|
debug_print(WARNING, "Expected an argument to kernel option `start`. Ignoring.");
|
|
} else {
|
|
debug_print(NOTICE, "Got start argument: %s", c);
|
|
boot_arg = strdup(c);
|
|
}
|
|
}
|
|
|
|
if (!fs_root) {
|
|
map_vfs_directory("/");
|
|
}
|
|
|
|
char * boot_app = "/bin/init";
|
|
if (args_present("init")) {
|
|
boot_app = args_value("init");
|
|
}
|
|
|
|
/* Prepare to run /bin/init */
|
|
char * argv[] = {
|
|
boot_app,
|
|
boot_arg,
|
|
NULL
|
|
};
|
|
int argc = 0;
|
|
while (argv[argc]) {
|
|
argc++;
|
|
}
|
|
system(argv[0], argc, argv); /* Run init */
|
|
|
|
debug_print(CRITICAL, "init failed");
|
|
switch_task(0);
|
|
|
|
return 0;
|
|
}
|
|
|