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#if defined(ENABLE_INITRD)
#include <stddef.h>
#include "device/initrd.h"
#include "device/processor.h"
#include "object.h"
#include "jove.h"
#include "bootargs.h"
#include "print.h"
#include "string.h"
#include "panic.h"
struct jove_ObjectDirectory s_initrd_dir = {
.entries = {
[0] = (objdir_entry_t){
.type = KO_OBJECT_DIRECTORY,
.data = 1
}
}
};
static uintptr_t s_initrd_getaddr(char *path);
#if defined(__limine__)
#include "boot/limine/limine.h"
static struct limine_module_request s_module_request = {
.id = LIMINE_MODULE_REQUEST
};
static uintptr_t
s_initrd_getaddr(char *path)
{
struct limine_module_response *response = s_module_request.response;
for(size_t i = 0; i < response->module_count; i++) {
struct limine_file *module = response->modules[i];
if(strcmp(path, module->path) == 0)
return (uintptr_t)module->address;
}
kpanic("Failed to load module at path %s\n", path);
}
#endif
static size_t
s_tar_oct_dec(const char *oct)
{
size_t r = 0;
for(; *oct; oct++) r = (r * 8) + (*oct - '0');
return r;
}
void
tar_parse(tar_block_t *block)
{
while(true) {
tar_header_t *header = &block->header;
if(*header->name == 0) return;
if(s_initrd_dir.self.data == OBJECT_DIRECTORY_MAX_ENTRIES) {
klogf("More than %i files in initrd! Skipping the rest.\n", OBJECT_DIRECTORY_MAX_ENTRIES - 1);
}
size_t file_size = s_tar_oct_dec(header->size);
s_initrd_dir.entries[s_initrd_dir.self.data++] = (objdir_entry_t) {
.type = KO_INITRD_FILE,
.data = (uintptr_t)block
};
klogf("Load file '%s' at %p sie %x\n", block->header.name, block + 1, file_size);
block = &block[(file_size / 512) + 1];
if(file_size % 512) block++;
}
}
void
initrd_setup(void)
{
char *initrd_path = bootargs_getarg("initrd");
if(initrd_path == 0) {
kpanic("Missing kernel commandline argument for initrd.");
}
uintptr_t initrd_addr = s_initrd_getaddr(initrd_path);
klogf("Initrd found at %p\n", initrd_addr);
tar_parse((tar_block_t*)initrd_addr);
_initDirectory.entries[INIT_OBJECT_INITRD_DIR] = (objdir_entry_t) {
.type = KO_OBJECT_DIRECTORY,
.data = (uintptr_t)&s_initrd_dir
};
}
int
initrd_file_size(tar_header_t *file)
{
return s_tar_oct_dec(file->size);
}
tar_header_t*
initrd_find_file(const char *filename)
{
for(size_t i = 0; i < s_initrd_dir.self.data - 1; i++) {
objdir_entry_t *entry = &s_initrd_dir.entries[i+1];
tar_header_t *file = (tar_header_t*)entry->data;
if(strcmp(file->name + 1, filename) == 0) return file;
}
return NULL;
}
#endif
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