With EFI booting the device tree is required but is not actually specified in any way. The normal method is to use a fdtfile environment variable to get the filename, then look for that file on the media.
Implement this in the bootmeth.
Signed-off-by: Simon Glass sjg@chromium.org ---
boot/bootmeth_efi.c | 105 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 99 insertions(+), 6 deletions(-)
diff --git a/boot/bootmeth_efi.c b/boot/bootmeth_efi.c index 77b4ba22470..53a0489b93c 100644 --- a/boot/bootmeth_efi.c +++ b/boot/bootmeth_efi.c @@ -143,10 +143,32 @@ static int distro_efi_check(struct udevice *dev, struct bootflow_iter *iter) return 0; }
+static void distro_efi_get_fdt_name(char *fname, int size) +{ + const char *fdt_fname; + + fdt_fname = env_get("fdtfile"); + if (fdt_fname) { + snprintf(fname, size, "dtb/%s", fdt_fname); + log_debug("Using device tree: %s\n", fname); + } else { + const char *soc = env_get("soc"); + const char *board = env_get("board"); + const char *boardver = env_get("boardver"); + + /* cf the code in label_boot() which seems very complex */ + snprintf(fname, size, "dtb/%s%s%s%s.dtb", + soc ? soc : "", soc ? "-" : "", board ? board : "", + boardver ? boardver : ""); + log_debug("Using default device tree: %s\n", fname); + } +} + static int distro_efi_read_bootflow_file(struct udevice *dev, struct bootflow *bflow) { struct blk_desc *desc = NULL; + ulong fdt_addr, size; char fname[256]; int ret;
@@ -170,15 +192,43 @@ static int distro_efi_read_bootflow_file(struct udevice *dev, if (ret) return log_msg_ret("read", -EINVAL);
+ distro_efi_get_fdt_name(fname, sizeof(fname)); + bflow->fdt_fname = strdup(fname); + if (!bflow->fdt_fname) + return log_msg_ret("fil", -ENOMEM); + + fdt_addr = env_get_hex("fdt_addr_r", 0); + ret = bootmeth_common_read_file(dev, bflow, fname, fdt_addr, &size); + if (!ret) { + bflow->fdt_size = size; + bflow->fdt_addr = fdt_addr; + + /* + * TODO: Apply extension overlay + * + * Here we need to load and apply the extension overlay. This is + * not implemented. See do_extension_apply(). The extension + * stuff needs an implementation in boot/extension.c so it is + * separate from the command code. Really the extension stuff + * should use the device tree and a uclass / driver interface + * rather than implementing its own list + */ + } else { + log_debug("No device tree available\n"); + } + return 0; }
static int distro_efi_read_bootflow_net(struct bootflow *bflow) { - const char *addr_str; + char file_addr[17], fname[256]; + char *tftp_argv[] = {"tftp", file_addr, fname, NULL}; + struct cmd_tbl cmdtp = {}; /* dummy */ + const char *addr_str, *fdt_addr_str; int ret, arch, size; + ulong addr, fdt_addr; char str[36]; - ulong addr;
ret = get_efi_pxe_vci(str, sizeof(str)); if (ret) @@ -216,6 +266,25 @@ static int distro_efi_read_bootflow_net(struct bootflow *bflow) efi_set_bootdev("Net", "", bflow->fname, map_sysmem(addr, 0), bflow->size);
+ /* read the DT file also */ + fdt_addr_str = env_get("fdt_addr_r"); + if (!fdt_addr_str) + return log_msg_ret("fdt", -EINVAL); + fdt_addr = hextoul(fdt_addr_str, NULL); + sprintf(file_addr, "%lx", fdt_addr); + + distro_efi_get_fdt_name(fname, sizeof(fname)); + bflow->fdt_fname = strdup(fname); + if (!bflow->fdt_fname) + return log_msg_ret("fil", -ENOMEM); + + if (!do_tftpb(&cmdtp, 0, 3, tftp_argv)) { + bflow->fdt_size = env_get_hex("filesize", 0); + bflow->fdt_addr = fdt_addr; + } else { + log_debug("No device tree available\n"); + } + bflow->state = BOOTFLOWST_READY;
return 0; @@ -243,15 +312,39 @@ static int distro_efi_read_bootflow(struct udevice *dev, struct bootflow *bflow)
int distro_efi_boot(struct udevice *dev, struct bootflow *bflow) { + ulong kernel, fdt; char cmd[50];
+ /* A non-zero buffer indicates the kernel is there */ + if (bflow->buf) { + kernel = (ulong)map_to_sysmem(bflow->buf); + + /* + * use the provided device tree if available, else fall back to + * the control FDT + */ + if (bflow->fdt_fname) + fdt = bflow->fdt_addr; + else + fdt = (ulong)map_to_sysmem(gd->fdt_blob); + } else { + /* + * This doesn't actually work for network devices: + * + * do_bootefi_image() No UEFI binary known at 0x02080000 + * + * But this is the same behaviour for distro boot, so it can be + * fixed here. + */ + kernel = env_get_hex("kernel_addr_r", 0); + fdt = env_get_hex("fdt_addr_r", 0); + } + /* * At some point we can add a real interface to bootefi so we can call - * this directly. For now, go through the CLI like distro boot. + * this directly. For now, go through the CLI, like distro boot. */ - snprintf(cmd, sizeof(cmd), "bootefi %lx %lx", - (ulong)map_to_sysmem(bflow->buf), - (ulong)map_to_sysmem(gd->fdt_blob)); + snprintf(cmd, sizeof(cmd), "bootefi %lx %lx", kernel, fdt); if (run_command(cmd, 0)) return log_msg_ret("run", -EINVAL);