91ac713b64
Sometimes filesystem modules need to pass details of the state of the filesystem to later stages of a boot. Provide a generic method to do so. We'll add them after any env variables set in our config files. Sponsored by: Netflix Reviewed by: tsoome, kevans Differential Revision: https://reviews.freebsd.org/D39407
345 lines
8.5 KiB
C
345 lines
8.5 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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* Copyright (c) 2001 Robert Drehmel
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* All rights reserved.
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* Copyright (c) 2014 Nathan Whitehorn
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* All rights reserved.
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* Copyright (c) 2015 Eric McCorkle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <machine/elf.h>
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#include <machine/stdarg.h>
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#include <stand.h>
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#include <efi.h>
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#include <eficonsctl.h>
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#include <efichar.h>
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#include "boot_module.h"
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#include "paths.h"
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#include "proto.h"
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static void efi_panic(EFI_STATUS s, const char *fmt, ...) __dead2 __printflike(2, 3);
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const boot_module_t *boot_modules[] =
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{
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#ifdef EFI_ZFS_BOOT
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&zfs_module,
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#endif
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#ifdef EFI_UFS_BOOT
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&ufs_module
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#endif
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};
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const UINTN num_boot_modules = nitems(boot_modules);
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static EFI_GUID BlockIoProtocolGUID = BLOCK_IO_PROTOCOL;
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static EFI_GUID DevicePathGUID = DEVICE_PATH_PROTOCOL;
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static EFI_GUID LoadedImageGUID = LOADED_IMAGE_PROTOCOL;
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static EFI_GUID ConsoleControlGUID = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
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static EFI_PHYSICAL_ADDRESS heap;
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static UINTN heapsize;
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/*
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* try_boot only returns if it fails to load the loader. If it succeeds
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* it simply boots, otherwise it returns the status of last EFI call.
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*/
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EFI_STATUS
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try_boot(const boot_module_t *mod, dev_info_t *dev, void *loaderbuf, size_t loadersize)
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{
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size_t bufsize, cmdsize;
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void *buf;
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char *cmd;
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EFI_HANDLE loaderhandle;
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EFI_LOADED_IMAGE *loaded_image;
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EFI_STATUS status;
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/*
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* Read in and parse the command line from /boot.config or /boot/config,
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* if present. We'll pass it the next stage via a simple ASCII
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* string. loader.efi has a hack for ASCII strings, so we'll use that to
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* keep the size down here. We only try to read the alternate file if
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* we get EFI_NOT_FOUND because all other errors mean that the boot_module
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* had troubles with the filesystem. We could return early, but we'll let
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* loading the actual kernel sort all that out. Since these files are
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* optional, we don't report errors in trying to read them.
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*/
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cmd = NULL;
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cmdsize = 0;
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status = mod->load(PATH_DOTCONFIG, dev, &buf, &bufsize);
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if (status == EFI_NOT_FOUND)
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status = mod->load(PATH_CONFIG, dev, &buf, &bufsize);
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if (status == EFI_SUCCESS) {
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cmdsize = bufsize + 1;
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cmd = malloc(cmdsize);
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if (cmd == NULL)
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goto errout;
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memcpy(cmd, buf, bufsize);
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cmd[bufsize] = '\0';
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free(buf);
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buf = NULL;
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}
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/*
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* See if there's any env variables the module wants to set. If so,
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* append it to any config present.
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*/
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if (mod->extra_env != NULL) {
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const char *env = mod->extra_env();
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if (env != NULL) {
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size_t newlen = cmdsize + strlen(env) + 1;
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cmd = realloc(cmd, newlen);
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if (cmd == NULL)
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goto errout;
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if (cmdsize > 0)
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strlcat(cmd, " ", newlen);
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strlcat(cmd, env, newlen);
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cmdsize = strlen(cmd);
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free(__DECONST(char *, env));
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}
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}
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if ((status = BS->LoadImage(TRUE, IH, efi_devpath_last_node(dev->devpath),
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loaderbuf, loadersize, &loaderhandle)) != EFI_SUCCESS) {
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printf("Failed to load image provided by %s, size: %zu, (%lu)\n",
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mod->name, loadersize, EFI_ERROR_CODE(status));
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goto errout;
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}
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status = OpenProtocolByHandle(loaderhandle, &LoadedImageGUID,
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(void **)&loaded_image);
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if (status != EFI_SUCCESS) {
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printf("Failed to query LoadedImage provided by %s (%lu)\n",
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mod->name, EFI_ERROR_CODE(status));
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goto errout;
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}
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if (cmd != NULL)
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printf(" command args: %s\n", cmd);
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loaded_image->DeviceHandle = dev->devhandle;
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loaded_image->LoadOptionsSize = cmdsize;
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loaded_image->LoadOptions = cmd;
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DPRINTF("Starting '%s' in 5 seconds...", PATH_LOADER_EFI);
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DSTALL(1000000);
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DPRINTF(".");
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DSTALL(1000000);
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DPRINTF(".");
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DSTALL(1000000);
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DPRINTF(".");
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DSTALL(1000000);
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DPRINTF(".");
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DSTALL(1000000);
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DPRINTF(".\n");
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if ((status = BS->StartImage(loaderhandle, NULL, NULL)) !=
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EFI_SUCCESS) {
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printf("Failed to start image provided by %s (%lu)\n",
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mod->name, EFI_ERROR_CODE(status));
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loaded_image->LoadOptionsSize = 0;
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loaded_image->LoadOptions = NULL;
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}
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errout:
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if (cmd != NULL)
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free(cmd);
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if (buf != NULL)
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free(buf);
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if (loaderbuf != NULL)
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free(loaderbuf);
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return (status);
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}
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EFI_STATUS
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efi_main(EFI_HANDLE Ximage, EFI_SYSTEM_TABLE *Xsystab)
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{
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EFI_HANDLE *handles;
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EFI_LOADED_IMAGE *img;
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EFI_DEVICE_PATH *imgpath;
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EFI_STATUS status;
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EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
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SIMPLE_TEXT_OUTPUT_INTERFACE *conout = NULL;
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UINTN i, hsize, nhandles;
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CHAR16 *text;
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/* Basic initialization*/
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ST = Xsystab;
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IH = Ximage;
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BS = ST->BootServices;
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RS = ST->RuntimeServices;
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heapsize = 64 * 1024 * 1024;
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status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
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EFI_SIZE_TO_PAGES(heapsize), &heap);
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if (status != EFI_SUCCESS) {
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ST->ConOut->OutputString(ST->ConOut,
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__DECONST(CHAR16 *,
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L"Failed to allocate memory for heap.\r\n"));
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BS->Exit(IH, status, 0, NULL);
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}
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setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize));
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/* Set up the console, so printf works. */
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status = BS->LocateProtocol(&ConsoleControlGUID, NULL,
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(VOID **)&ConsoleControl);
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if (status == EFI_SUCCESS)
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(void)ConsoleControl->SetMode(ConsoleControl,
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EfiConsoleControlScreenText);
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/*
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* Reset the console enable the cursor. Later we'll choose a better
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* console size through GOP/UGA.
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*/
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conout = ST->ConOut;
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conout->Reset(conout, TRUE);
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/* Explicitly set conout to mode 0, 80x25 */
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conout->SetMode(conout, 0);
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conout->EnableCursor(conout, TRUE);
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conout->ClearScreen(conout);
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printf("\n>> FreeBSD EFI boot block\n");
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printf(" Loader path: %s\n\n", PATH_LOADER_EFI);
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printf(" Initializing modules:");
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for (i = 0; i < num_boot_modules; i++) {
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printf(" %s", boot_modules[i]->name);
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if (boot_modules[i]->init != NULL)
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boot_modules[i]->init();
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}
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putchar('\n');
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/* Fetch all the block I/O handles, we have to search through them later */
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hsize = 0;
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BS->LocateHandle(ByProtocol, &BlockIoProtocolGUID, NULL,
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&hsize, NULL);
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handles = malloc(hsize);
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if (handles == NULL)
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efi_panic(EFI_OUT_OF_RESOURCES, "Failed to allocate %d handles\n",
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hsize);
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status = BS->LocateHandle(ByProtocol, &BlockIoProtocolGUID,
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NULL, &hsize, handles);
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if (status != EFI_SUCCESS)
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efi_panic(status, "Failed to get device handles\n");
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nhandles = hsize / sizeof(*handles);
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/* Determine the devpath of our image so we can prefer it. */
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status = OpenProtocolByHandle(IH, &LoadedImageGUID, (void **)&img);
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imgpath = NULL;
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if (status == EFI_SUCCESS) {
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text = efi_devpath_name(img->FilePath);
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if (text != NULL) {
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printf(" Load Path: %S\n", text);
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efi_setenv_freebsd_wcs("Boot1Path", text);
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efi_free_devpath_name(text);
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}
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status = OpenProtocolByHandle(img->DeviceHandle,
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&DevicePathGUID, (void **)&imgpath);
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if (status != EFI_SUCCESS) {
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DPRINTF("Failed to get image DevicePath (%lu)\n",
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EFI_ERROR_CODE(status));
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} else {
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text = efi_devpath_name(imgpath);
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if (text != NULL) {
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printf(" Load Device: %S\n", text);
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efi_setenv_freebsd_wcs("Boot1Dev", text);
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efi_free_devpath_name(text);
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}
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}
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}
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choice_protocol(handles, nhandles, imgpath);
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/* If we get here, we're out of luck... */
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efi_panic(EFI_LOAD_ERROR, "No bootable partitions found!");
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}
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/*
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* add_device adds a device to the passed devinfo list.
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*/
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void
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add_device(dev_info_t **devinfop, dev_info_t *devinfo)
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{
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dev_info_t *dev;
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if (*devinfop == NULL) {
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*devinfop = devinfo;
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return;
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}
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for (dev = *devinfop; dev->next != NULL; dev = dev->next)
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;
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dev->next = devinfo;
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}
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void
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efi_exit(EFI_STATUS s)
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{
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BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize));
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BS->Exit(IH, s, 0, NULL);
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}
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void
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exit(int error __unused)
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{
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efi_exit(EFI_LOAD_ERROR);
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}
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/*
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* OK. We totally give up. Exit back to EFI with a sensible status so
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* it can try the next option on the list.
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*/
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static void
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efi_panic(EFI_STATUS s, const char *fmt, ...)
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{
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va_list ap;
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printf("panic: ");
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va_start(ap, fmt);
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vprintf(fmt, ap);
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va_end(ap);
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printf("\n");
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efi_exit(s);
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}
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int getchar(void)
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{
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return (-1);
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}
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void
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putchar(int c)
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{
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CHAR16 buf[2];
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if (c == '\n') {
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buf[0] = '\r';
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buf[1] = 0;
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ST->ConOut->OutputString(ST->ConOut, buf);
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}
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buf[0] = c;
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buf[1] = 0;
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ST->ConOut->OutputString(ST->ConOut, buf);
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}
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