int __kinit__ devfs_init(void)
{
struct fs_superblock * sb;
SUBSYS_DEP(ramfs_init);
SUBSYS_INIT("devfs");
FS_GIANT_INIT(&devfs_fs.fs_giant);
/*
* Inherit ramfs and override what's needed.
*/
fs_inherit_vnops(&devfs_vnode_ops, &ramfs_vnode_ops);
vn_devfs = fs_create_pseudofs_root(&devfs_fs, VDEV_MJNR_DEVFS);
if (!vn_devfs)
return -ENOMEM;
/*
* It's perfectly ok to set a new delete_vnode() function
* as sb struct is always a fresh struct so altering it
* doesn't really break functionality for anyone else than us.
*/
sb = vn_devfs->sb;
sb->delete_vnode = devfs_delete_vnode;
sb->umount = devfs_umount;
/*
* Finally register our creation with fs subsystem.
*/
fs_register(&devfs_fs);
_devfs_create_specials();
return 0;
}
int __kinit__ bcm2835_info_init(void)
{
SUBSYS_DEP(bcm2835_prop_init);
SUBSYS_INIT("BCM2835_info");
kputs("\n");
print_prop("firmware", 0x00000001, 1);
print_prop("board model", 0x00010001, 1);
print_prop("board rev", 0x00010002, 1);
print_prop("board serial", 0x00010004, 2);
return 0;
}
int __kinit__ fatfs_init(void)
{
int err;
SUBSYS_DEP(fs_init);
SUBSYS_DEP(proc_init);
SUBSYS_INIT("fatfs");
fatfs_sb_arr = kcalloc(configFATFS_MAX_MOUNTS, sizeof(struct fatfs_sb *));
if (!fatfs_sb_arr)
return -ENOMEM;
fs_inherit_vnops(&fatfs_vnode_ops, &nofs_vnode_ops);
err = ff_init();
if (err)
return err;
FS_GIANT_INIT(&fatfs_fs.fs_giant);
fs_register(&fatfs_fs);
return 0;
}
int __kinit__ procfs_init(void)
{
SUBSYS_DEP(ramfs_init);
SUBSYS_INIT("procfs");
/*
* This must be static as it's referenced and used in the file system via
* the fs object system.
*/
static fs_t procfs_fs = {
.fsname = PROCFS_FSNAME,
.mount = procfs_mount,
.sblist_head = SLIST_HEAD_INITIALIZER(),
};
specinfo_pool = mempool_init(MEMPOOL_TYPE_NONBLOCKING,
sizeof(struct procfs_info),
configMAXPROC);
if (!specinfo_pool)
return -ENOMEM;
FS_GIANT_INIT(&procfs_fs.fs_giant);
/*
* Inherit unimplemented vnops from ramfs.
*/
fs_inherit_vnops(&procfs_vnode_ops, &ramfs_vnode_ops);
vn_procfs = fs_create_pseudofs_root(&procfs_fs, VDEV_MJNR_PROCFS);
if (!vn_procfs)
return -ENOMEM;
struct fs_superblock * sb = vn_procfs->sb;
sb->delete_vnode = procfs_delete_vnode;
vn_procfs->sb->umount = procfs_umount;
fs_register(&procfs_fs);
int err = init_permanent_files();
if (err)
return err;
procfs_updatedir(vn_procfs);
return 0;
}
int __kinit__ devfs_init(void)
{
SUBSYS_DEP(ramfs_init);
SUBSYS_INIT("devfs");
/*
* This must be static as it's referenced and used in the file system via
* the fs object system.
*/
static fs_t devfs_fs = {
.fsname = DEVFS_FSNAME,
.mount = devfs_mount,
.sblist_head = SLIST_HEAD_INITIALIZER(),
};
FS_GIANT_INIT(&devfs_fs.fs_giant);
/*
* Inherit ramfs and override what's needed.
*/
fs_inherit_vnops(&devfs_vnode_ops, &ramfs_vnode_ops);
vn_devfs = fs_create_pseudofs_root(&devfs_fs, VDEV_MJNR_DEVFS);
if (!vn_devfs)
return -ENOMEM;
/*
* It's perfectly ok to set a new delete_vnode() function
* as sb struct is always a fresh struct so altering it
* doesn't really break functionality for anyone else than us.
*/
struct fs_superblock * sb = vn_devfs->sb;
sb->delete_vnode = devfs_delete_vnode;
sb->umount = devfs_umount;
/*
* Finally register our creation with fs subsystem.
*/
fs_register(&devfs_fs);
_devfs_create_specials();
return 0;
}
static pthread_t create_uinit_main(void * stack_addr)
{
struct _sched_pthread_create_args init_ds = {
.param.sched_policy = SCHED_OTHER,
.param.sched_priority = NZERO,
.stack_addr = stack_addr,
.stack_size = configUSRINIT_SSIZE,
.flags = 0,
.start = uinit, /* We have to first get into user space to use exec
* and mount the rootfs.
*/
.arg1 = (uintptr_t)rootfs,
.del_thread = (void (*)(void *))uinit_exit,
};
return thread_create(&init_ds, THREAD_MODE_PRIV);
}
/**
* Map vmstack to proc.
*/
static void map_vmstack2proc(struct proc_info * proc, struct buf * vmstack)
{
struct vm_pt * vpt;
(*proc->mm.regions)[MM_STACK_REGION] = vmstack;
vm_updateusr_ap(vmstack);
vpt = ptlist_get_pt(&proc->mm, vmstack->b_mmu.vaddr,
MMU_PGSIZE_COARSE, VM_PT_CREAT);
if (vpt == 0)
panic("Couldn't get vpt for init stack");
vmstack->b_mmu.pt = &(vpt->pt);
vm_map_region(vmstack, vpt);
}
/**
* Create init process.
*/
int __kinit__ kinit(void)
{
SUBSYS_DEP(sched_init);
SUBSYS_DEP(proc_init);
SUBSYS_DEP(ramfs_init);
SUBSYS_DEP(sysctl_init);
SUBSYS_INIT("kinit");
char strbuf[80]; /* Buffer for panic messages. */
struct buf * init_vmstack;
pthread_t tid;
pid_t pid;
struct thread_info * init_thread;
struct proc_info * init_proc;
/*
* FIXME Memory allocation, protection or manipulation bug!
* There is a critical bug causing random crashes in userland. I suspect
* something is overwriting user space allocation from the kernel space.
* Allocating some memory before init is executed seems to fix this issue,
* however naturally this is not the proper way to fix the bug.
* Without the allocation here the issue is sometimes seen in init or
* usually after couple of fork + exec + exit cycles. The usual symptom is
* that the userland app first calls some 0:0 syscalls and then tries to
* execute undefined instruction, which probably means that either some
* jump table in the heap or some part of the executable code is modified
* by a bad access in kernel mode just before this happens.
*/
(void)geteblk(MMU_PGSIZE_COARSE * 10);
mount_tmp_rootfs();
/*
* User stack for init
*/
init_vmstack = create_vmstack();
if (!init_vmstack)
panic("Can't allocate a stack for init");
/*
* Create a thread for init
*/
tid = create_uinit_main((void *)(init_vmstack->b_mmu.paddr));
if (tid < 0) {
ksprintf(strbuf, sizeof(strbuf), "Can't create a thread for init. %i",
tid);
panic(strbuf);
}
/*
* pid of init
*/
pid = proc_fork();
if (pid <= 0) {
ksprintf(strbuf, sizeof(strbuf), "Can't fork a process for init. %i",
pid);
panic(strbuf);
}
init_thread = thread_lookup(tid);
if (!init_thread) {
panic("Can't get thread descriptor of init_thread!");
}
init_proc = proc_ref(pid);
if (!init_proc || (init_proc->state == PROC_STATE_INITIAL)) {
panic("Failed to get proc struct or invalid struct");
}
init_thread->pid_owner = pid;
init_thread->curr_mpt = &init_proc->mm.mpt;
/*
* Map the previously created user stack with init process page table.
*/
map_vmstack2proc(init_proc, init_vmstack);
/*
* Map tkstack of init with vm_pagetable_system.
*/
mmu_map_region(&init_thread->kstack_region->b_mmu);
init_proc->main_thread = init_thread;
KERROR_DBG("Init created with pid: %u, tid: %u, stack: %p\n",
pid, tid, (void *)init_vmstack->b_mmu.vaddr);
proc_unref(init_proc);
return 0;
}
