112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co.
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* Contributed by Stephane Eranian <eranian@hpl.hp.com>
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*
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* This file is part of the ELILO, the EFI Linux boot loader.
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*
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* ELILO is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* ELILO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with ELILO; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Please check out the elilo.txt for complete documentation on how
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* to use this program.
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "elilo.h"
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/*
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* This function allocates memory for the initial ramdisk (initrd) and loads it to memory
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* OUTPUTS:
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* - ELILO_LOAD_SUCCESS: if everything works
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* - ELILO_LOAD_ABORTED: in case the user decided to abort loading
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* - ELILO_LOAD_ERROR: there was an error during alloc/read
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*
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* Adapted from Bill Nottingham <notting@redhat.com> patch for ELI.
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*/
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INTN
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load_initrd(CHAR16 *filename, memdesc_t *initrd)
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{
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EFI_STATUS status;
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VOID *start_addr = initrd->start_addr;
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UINT64 size = 0;
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UINTN pgcnt;
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fops_fd_t fd;
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INTN ret = ELILO_LOAD_ERROR;
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if (filename == NULL || filename[0] == 0) return -1;
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/* Open the file */
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status = fops_open(filename, &fd);
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if (EFI_ERROR(status)) {
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ERR_PRT((L"Open initrd file %s failed: %r", filename, status));
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return -1;
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}
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DBG_PRT((L"initrd_open %s worked", filename));
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/* warning: this function allocates memory */
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status = fops_infosize(fd, &size);
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if (EFI_ERROR(status)) {
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ERR_PRT((L"Couldn't read initrd file %s info %r",filename, status));
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goto error;
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}
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/* round up to get required number of pages (4KB) */
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initrd->pgcnt = pgcnt = EFI_SIZE_TO_PAGES(size);
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start_addr = alloc_pages(pgcnt, EfiLoaderData, start_addr ? AllocateAddress : AllocateAnyPages, start_addr);
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if (start_addr == NULL) {
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ERR_PRT((L"Failed to allocate %d pages for initrd", pgcnt));
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goto error;
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}
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VERB_PRT(2, Print(L"initrd: total_size: %ld bytes base: 0x%lx pages %d\n",
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size, (UINT64)start_addr, pgcnt));
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Print(L"Loading initrd %s...", filename);
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ret = read_file(fd, size, start_addr);
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fops_close(fd);
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if (ret != ELILO_LOAD_SUCCESS) {
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ERR_PRT((L"read initrd(%s) failed: %d", filename, ret));
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goto error;
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}
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Print(L"done\n");
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initrd->start_addr = start_addr;
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return ELILO_LOAD_SUCCESS;
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error:
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if (start_addr) free(start_addr);
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/*
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* make sure nothing is passed to kernel
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* in case of error.
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*/
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initrd->start_addr = 0;
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initrd->pgcnt = 0;
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return ret;
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}
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