diff options
| -rw-r--r-- | cmd/Kconfig | 9 | ||||
| -rw-r--r-- | cmd/bootefi.c | 27 | ||||
| -rw-r--r-- | doc/README.efi | 14 | ||||
| -rw-r--r-- | include/asm-generic/sections.h | 2 | ||||
| -rw-r--r-- | lib/efi_loader/Makefile | 4 | ||||
| -rw-r--r-- | lib/efi_loader/helloworld.c | 24 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 33 |
7 files changed, 107 insertions, 6 deletions
diff --git a/cmd/Kconfig b/cmd/Kconfig index e339d86..ebcfd6d 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -181,6 +181,15 @@ config CMD_BOOTEFI help Boot an EFI image from memory. +config CMD_BOOTEFI_HELLO + bool "Allow booting a standard EFI hello world for testing" + depends on CMD_BOOTEFI && NEED_CRT0_ENABLEMENT + help + This adds a standard EFI hello world application to U-Boot so that + it can be used with the 'bootefi hello' command. This is useful + for testing that EFI is working at a basic level, and for bringing + up EFI support on a new architecture. + config CMD_ELF bool "bootelf, bootvx" default y diff --git a/cmd/bootefi.c b/cmd/bootefi.c index 3ab256e..ae1b713 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -239,13 +239,23 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (argc < 2) return CMD_RET_USAGE; - saddr = argv[1]; +#ifdef CONFIG_CMD_BOOTEFI_HELLO + if (!strcmp(argv[1], "hello")) { + ulong size = __efi_hello_world_end - __efi_hello_world_begin; - addr = simple_strtoul(saddr, NULL, 16); + addr = CONFIG_SYS_LOAD_ADDR; + memcpy((char *)addr, __efi_hello_world_begin, size); + } else +#endif + { + saddr = argv[1]; - if (argc > 2) { - sfdt = argv[2]; - fdt_addr = simple_strtoul(sfdt, NULL, 16); + addr = simple_strtoul(saddr, NULL, 16); + + if (argc > 2) { + sfdt = argv[2]; + fdt_addr = simple_strtoul(sfdt, NULL, 16); + } } printf("## Starting EFI application at %08lx ...\n", addr); @@ -263,7 +273,12 @@ static char bootefi_help_text[] = "<image address> [fdt address]\n" " - boot EFI payload stored at address <image address>.\n" " If specified, the device tree located at <fdt address> gets\n" - " exposed as EFI configuration table.\n"; + " exposed as EFI configuration table.\n" +#ifdef CONFIG_CMD_BOOTEFI_HELLO + "hello\n" + " - boot a sample Hello World application stored within U-Boot" +#endif + ; #endif U_BOOT_CMD( diff --git a/doc/README.efi b/doc/README.efi index 1fd3f00..66259f3 100644 --- a/doc/README.efi +++ b/doc/README.efi @@ -310,6 +310,20 @@ Removable media booting (search for /efi/boot/boota{a64,arm}.efi) is supported. Simple use cases like "Plug this SD card into my ARM device and it just boots into grub which boots into Linux", work very well. + +Running HelloWord.efi +--------------------- + +You can run a simple 'hello world' EFI program in U-Boot. +Enable the option CONFIG_CMD_BOOTEFI_HELLO. + +Then you can boot into U-Boot and type: + + > bootefi hello + +The 'hello world EFI' program will then run, print a message and exit. + + Future work ----------- diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index d69bc60..daf021b 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -22,6 +22,8 @@ extern char __kprobes_text_start[], __kprobes_text_end[]; extern char __entry_text_start[], __entry_text_end[]; extern char __initdata_begin[], __initdata_end[]; extern char __start_rodata[], __end_rodata[]; +extern char __efi_hello_world_begin[]; +extern char __efi_hello_world_end[]; /* Start and end of .ctors section - used for constructor calls. */ extern char __ctors_start[], __ctors_end[]; diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index 12159dd..f466408 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -7,6 +7,10 @@ # This file only gets included with CONFIG_EFI_LOADER set, so all # object inclusion implicitly depends on it +CFLAGS_helloworld.o := $(CFLAGS_EFI) +CFLAGS_REMOVE_helloworld.o := $(CFLAGS_NON_EFI) + +obj-$(CONFIG_CMD_BOOTEFI_HELLO) += helloworld_efi.o obj-y += efi_image_loader.o efi_boottime.o efi_runtime.o efi_console.o obj-y += efi_memory.o obj-$(CONFIG_LCD) += efi_gop.o diff --git a/lib/efi_loader/helloworld.c b/lib/efi_loader/helloworld.c new file mode 100644 index 0000000..03e65ab --- /dev/null +++ b/lib/efi_loader/helloworld.c @@ -0,0 +1,24 @@ +/* + * EFI hello world + * + * Copyright (c) 2016 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <part_efi.h> +#include <efi_api.h> + +efi_status_t EFIAPI efi_main(efi_handle_t handle, + struct efi_system_table *systable) +{ + struct efi_simple_text_output_protocol *con_out = systable->con_out; + struct efi_boot_services *boottime = systable->boottime; + + con_out->output_string(con_out, L"Hello, world!\n"); + boottime->exit(handle, 0, 0, NULL); + + return EFI_SUCCESS; +} diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 45a0e1d..956a8a9 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -321,6 +321,39 @@ cmd_S_ttf= \ $(obj)/%.S: $(src)/%.ttf $(call cmd,S_ttf) +# EFI Hello World application +# --------------------------------------------------------------------------- + +# Generate an assembly file to wrap the EFI app +cmd_S_efi= \ +( \ + echo '.section .rodata.efi.init,"a"'; \ + echo '.balign 16'; \ + echo '.global __efi_hello_world_begin'; \ + echo '__efi_hello_world_begin:'; \ + echo '.incbin "$<" '; \ + echo '__efi_hello_world_end:'; \ + echo '.global __efi_hello_world_end'; \ + echo '.balign 16'; \ +) > $@ + +$(obj)/%_efi.S: $(obj)/%.efi + $(call cmd,S_efi) + +$(obj)/%.efi: $(obj)/%.so + $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j .dynamic \ + -j .dynsym -j .rel* -j .rela* -j .reloc \ + $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@ + +EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS) + +$(obj)/helloworld.so: $(EFI_LDS_PATH) + +$(obj)/helloworld.so: $(obj)/helloworld.o arch/$(ARCH)/lib/$(EFI_CRT0) \ + arch/$(ARCH)/lib/$(EFI_RELOC) + $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared -Bsymbolic \ + $^ -o $@ + # ACPI # --------------------------------------------------------------------------- quiet_cmd_acpi_c_asl= ASL $< |