At present this bootmeth only supports reading from a filesystem. Add support for reading from a network also, using DHCP with autoload.
Signed-off-by: Simon Glass sjg@chromium.org ---
boot/bootmeth_efi.c | 117 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 109 insertions(+), 8 deletions(-)
diff --git a/boot/bootmeth_efi.c b/boot/bootmeth_efi.c index f7bb153d9de..77b4ba22470 100644 --- a/boot/bootmeth_efi.c +++ b/boot/bootmeth_efi.c @@ -19,6 +19,7 @@ #include <malloc.h> #include <mapmem.h> #include <mmc.h> +#include <net.h> #include <pxe_utils.h>
#define EFI_DIRNAME "efi/boot/" @@ -59,6 +60,40 @@ static int get_efi_leafname(char *str, int max_len) return 0; }
+static int get_efi_pxe_arch(void) +{ + /* http://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xml */ + if (IS_ENABLED(CONFIG_ARM64)) + return 0xb; + else if (IS_ENABLED(CONFIG_ARM)) + return 0xa; + else if (IS_ENABLED(CONFIG_X86_64)) + return 0x6; + else if (IS_ENABLED(CONFIG_X86)) + return 0x7; + else if (IS_ENABLED(CONFIG_ARCH_RV32I)) + return 0x19; + else if (IS_ENABLED(CONFIG_ARCH_RV64I)) + return 0x1b; + else if (IS_ENABLED(CONFIG_SANDBOX)) + return 0; /* not used */ + + return -EINVAL; +} + +static int get_efi_pxe_vci(char *str, int max_len) +{ + int ret; + + ret = get_efi_pxe_arch(); + if (ret < 0) + return ret; + + snprintf(str, max_len, "PXEClient:Arch:%05x:UNDI:003000", ret); + + return 0; +} + static int efiload_read_file(struct blk_desc *desc, struct bootflow *bflow) { const struct udevice *media_dev; @@ -101,20 +136,18 @@ static int efiload_read_file(struct blk_desc *desc, struct bootflow *bflow)
static int distro_efi_check(struct udevice *dev, struct bootflow_iter *iter) { - int ret; - - /* This only works on block devices */ - ret = bootflow_iter_check_blk(iter); - if (ret) - return log_msg_ret("blk", ret); + /* This only works on block and network devices */ + if (bootflow_iter_check_blk(iter) && bootflow_iter_check_net(iter)) + return log_msg_ret("blk", -ENOTSUPP);
return 0; }
-static int distro_efi_read_bootflow(struct udevice *dev, struct bootflow *bflow) +static int distro_efi_read_bootflow_file(struct udevice *dev, + struct bootflow *bflow) { struct blk_desc *desc = NULL; - char fname[sizeof(EFI_DIRNAME) + 16]; + char fname[256]; int ret;
/* We require a partition table */ @@ -140,6 +173,74 @@ static int distro_efi_read_bootflow(struct udevice *dev, struct bootflow *bflow) return 0; }
+static int distro_efi_read_bootflow_net(struct bootflow *bflow) +{ + const char *addr_str; + int ret, arch, size; + char str[36]; + ulong addr; + + ret = get_efi_pxe_vci(str, sizeof(str)); + if (ret) + return log_msg_ret("vci", ret); + ret = get_efi_pxe_arch(); + if (ret < 0) + return log_msg_ret("arc", ret); + arch = ret; + + ret = env_set("bootp_vci", str); + if (ret) + return log_msg_ret("vcs", ret); + ret = env_set_ulong("bootp_arch", arch); + if (ret) + return log_msg_ret("ars", ret); + + /* figure out the load address */ + addr_str = env_get("kernel_addr_r"); + addr = addr_str ? hextoul(addr_str, NULL) : image_load_addr; + + /* clear any previous bootfile */ + env_set("bootfile", NULL); + + /* read the kernel */ + ret = dhcp_run(addr, NULL, true); + if (ret) + return log_msg_ret("dhc", ret); + + size = env_get_hex("filesize", -1); + if (size <= 0) + return log_msg_ret("sz", -EINVAL); + bflow->size = size; + + /* do the hideous EFI hack */ + efi_set_bootdev("Net", "", bflow->fname, map_sysmem(addr, 0), + bflow->size); + + bflow->state = BOOTFLOWST_READY; + + return 0; +} + +static int distro_efi_read_bootflow(struct udevice *dev, struct bootflow *bflow) +{ + const struct udevice *media = dev_get_parent(bflow->dev); + int ret; + + if (IS_ENABLED(CONFIG_CMD_DHCP) && + device_get_uclass_id(media) == UCLASS_ETH) { + /* we only support reading from one device, so ignore 'dev' */ + ret = distro_efi_read_bootflow_net(bflow); + if (ret) + return log_msg_ret("net", ret); + } else { + ret = distro_efi_read_bootflow_file(dev, bflow); + if (ret) + return log_msg_ret("blk", ret); + } + + return 0; +} + int distro_efi_boot(struct udevice *dev, struct bootflow *bflow) { char cmd[50];