[efi] Generalise EFI entropy generation to non-x86 CPUs
[ipxe.git] / src / interface / efi / efiprefix.c
1 /*
2 * Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 */
19
20 FILE_LICENCE ( GPL2_OR_LATER );
21
22 #include <stdlib.h>
23 #include <errno.h>
24 #include <ipxe/device.h>
25 #include <ipxe/efi/efi.h>
26 #include <ipxe/efi/efi_driver.h>
27 #include <ipxe/efi/efi_snp.h>
28 #include <ipxe/efi/efi_autoboot.h>
29 #include <ipxe/efi/efi_watchdog.h>
30
31 /**
32 * EFI entry point
33 *
34 * @v image_handle Image handle
35 * @v systab System table
36 * @ret efirc EFI return status code
37 */
38 EFI_STATUS EFIAPI _efi_start ( EFI_HANDLE image_handle,
39 EFI_SYSTEM_TABLE *systab ) {
40 EFI_STATUS efirc;
41 int rc;
42
43 /* Initialise EFI environment */
44 if ( ( efirc = efi_init ( image_handle, systab ) ) != 0 )
45 goto err_init;
46
47 /* Record autoboot device (if any) */
48 efi_set_autoboot();
49
50 /* Claim SNP devices for use by iPXE */
51 efi_snp_claim();
52
53 /* Start watchdog holdoff timer */
54 efi_watchdog_start();
55
56 /* Call to main() */
57 if ( ( rc = main() ) != 0 ) {
58 efirc = EFIRC ( rc );
59 goto err_main;
60 }
61
62 err_main:
63 efi_watchdog_stop();
64 efi_snp_release();
65 efi_loaded_image->Unload ( image_handle );
66 efi_driver_reconnect_all();
67 err_init:
68 return efirc;
69 }
70
71 /**
72 * Probe EFI root bus
73 *
74 * @v rootdev EFI root device
75 */
76 static int efi_probe ( struct root_device *rootdev __unused ) {
77
78 return efi_driver_connect_all();
79 }
80
81 /**
82 * Remove EFI root bus
83 *
84 * @v rootdev EFI root device
85 */
86 static void efi_remove ( struct root_device *rootdev __unused ) {
87
88 efi_driver_disconnect_all();
89 }
90
91 /** EFI root device driver */
92 static struct root_driver efi_root_driver = {
93 .probe = efi_probe,
94 .remove = efi_remove,
95 };
96
97 /** EFI root device */
98 struct root_device efi_root_device __root_device = {
99 .dev = { .name = "EFI" },
100 .driver = &efi_root_driver,
101 };