int
command_fdt_internal(int argc, char *argv[])
{
cmdf_t *cmdh;
int flags;
char *cmd;
int i, err;
if (argc < 2) {
command_errmsg = "usage is 'fdt <command> [<args>]";
return (CMD_ERROR);
}
/*
* Validate fdt <command>.
*/
cmd = strdup(argv[1]);
i = 0;
cmdh = NULL;
while (!(commands[i].name == NULL)) {
if (strcmp(cmd, commands[i].name) == 0) {
/* found it */
cmdh = commands[i].handler;
flags = commands[i].flags;
break;
}
i++;
}
if (cmdh == NULL) {
command_errmsg = "unknown command";
return (CMD_ERROR);
}
if (flags & CMD_REQUIRES_BLOB) {
/*
* Check if uboot env vars were parsed already. If not, do it now.
*/
if (fdt_fixup() == 0)
return (CMD_ERROR);
}
/*
* Call command handler.
*/
err = (*cmdh)(argc, argv);
return (err);
}
/*
* Copy DTB blob to specified location and return size
*/
int
fdt_copy(vm_offset_t va)
{
int err;
debugf("fdt_copy va 0x%08x\n", va);
if (fdtp == NULL) {
err = fdt_setup_fdtp();
if (err) {
printf("No valid device tree blob found!\n");
return (0);
}
}
if (fdt_fixup() == 0)
return (0);
if (fdtp_va != 0) {
/* Overwrite the FDT with the fixed version. */
/* XXX Is this really appropriate? */
COPYIN(fdtp, fdtp_va, fdtp_size);
}
COPYIN(fdtp, va, fdtp_size);
return (fdtp_size);
}
/*
* Load the information expected by a kernel.
*
* - The 'boothowto' argument is constructed
* - The 'bootdev' argument is constructed
* - The kernel environment is copied into kernel space.
* - Module metadata are formatted and placed in kernel space.
*/
int
md_load(char *args, vm_offset_t *modulep)
{
struct preloaded_file *kfp, *bfp;
struct preloaded_file *xp;
struct file_metadata *md;
struct bootinfo *bip;
vm_offset_t kernend;
vm_offset_t addr;
vm_offset_t envp;
vm_offset_t size;
vm_offset_t vaddr;
vm_offset_t dtbp;
char *rootdevname;
int howto;
int i;
/*
* These metadata addreses must be converted for kernel after
* relocation.
*/
uint32_t mdt[] = {
MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
MODINFOMD_ENVP,
#if defined(LOADER_FDT_SUPPORT)
MODINFOMD_DTBP
#endif
};
howto = md_getboothowto(args);
/*
* Allow the environment variable 'rootdev' to override the supplied
* device. This should perhaps go to MI code and/or have $rootdev
* tested/set by MI code before launching the kernel.
*/
rootdevname = getenv("rootdev");
if (rootdevname == NULL)
rootdevname = getenv("currdev");
/* Try reading the /etc/fstab file to select the root device */
getrootmount(rootdevname);
/* Find the last module in the chain */
addr = 0;
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
if (addr < (xp->f_addr + xp->f_size))
addr = xp->f_addr + xp->f_size;
}
/* Pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
/* Copy our environment */
envp = addr;
addr = md_copyenv(addr);
/* Pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
kernend = 0;
kfp = file_findfile(NULL, "elf32 kernel");
if (kfp == NULL)
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL)
panic("can't find kernel file");
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
#if defined(LOADER_FDT_SUPPORT)
/* Handle device tree blob */
dtbp = fdt_fixup();
if (dtbp != 0)
file_addmetadata(kfp, MODINFOMD_DTBP, sizeof dtbp, &dtbp);
else
pager_output("WARNING! Trying to fire up the kernel, but no "
"device tree blob found!\n");
#endif
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
/* Figure out the size and location of the metadata */
*modulep = addr;
size = md_copymodules(0);
kernend = roundup(addr + size, PAGE_SIZE);
/* Provide MODINFOMD_KERNEND */
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
bcopy(&kernend, md->md_data, sizeof kernend);
/* Convert addresses to the final VA */
*modulep -= __elfN(relocation_offset);
for (i = 0; i < sizeof mdt / sizeof mdt[0]; i++) {
md = file_findmetadata(kfp, mdt[i]);
if (md) {
bcopy(md->md_data, &vaddr, sizeof vaddr);
vaddr -= __elfN(relocation_offset);
bcopy(&vaddr, md->md_data, sizeof vaddr);
}
}
/* Only now copy actual modules and metadata */
(void)md_copymodules(addr);
return (0);
}