1 /*- 2 * Copyright (c) 2018 Netflix, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <stand.h> 31 #include <efi.h> 32 #include <efichar.h> 33 #include <efilib.h> 34 35 static EFI_GUID FreeBSDBootVarGUID = FREEBSD_BOOT_VAR_GUID; 36 static EFI_GUID GlobalBootVarGUID = EFI_GLOBAL_VARIABLE; 37 38 EFI_STATUS 39 efi_getenv(EFI_GUID *g, const char *v, void *data, size_t *len) 40 { 41 size_t ul; 42 CHAR16 *uv; 43 UINT32 attr; 44 UINTN dl; 45 EFI_STATUS rv; 46 47 uv = NULL; 48 if (utf8_to_ucs2(v, &uv, &ul) != 0) 49 return (EFI_OUT_OF_RESOURCES); 50 dl = *len; 51 rv = RS->GetVariable(uv, g, &attr, &dl, data); 52 if (rv == EFI_SUCCESS) 53 *len = dl; 54 free(uv); 55 return (rv); 56 } 57 58 EFI_STATUS 59 efi_global_getenv(const char *v, void *data, size_t *len) 60 { 61 62 return (efi_getenv(&GlobalBootVarGUID, v, data, len)); 63 } 64 65 EFI_STATUS 66 efi_freebsd_getenv(const char *v, void *data, size_t *len) 67 { 68 69 return (efi_getenv(&FreeBSDBootVarGUID, v, data, len)); 70 } 71 72 EFI_STATUS 73 efi_setenv_freebsd_wcs(const char *varname, CHAR16 *valstr) 74 { 75 CHAR16 *var = NULL; 76 size_t len; 77 EFI_STATUS rv; 78 79 if (utf8_to_ucs2(varname, &var, &len) != 0) 80 return (EFI_OUT_OF_RESOURCES); 81 rv = RS->SetVariable(var, &FreeBSDBootVarGUID, 82 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, 83 (ucs2len(valstr) + 1) * sizeof(efi_char), valstr); 84 free(var); 85 return (rv); 86 } 87 88