payloads/libpayload/arch/mips/coreboot.c

   1 /*
   2  * This file is part of the libpayload project.
   3  *
   4  * Copyright (C) 2014 Imagination Technologies
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <libpayload-config.h>
  17 #include <libpayload.h>
  18 #include <coreboot_tables.h>
  19
  20 /* This pointer gets set in head.S and is passed in from coreboot. */
  21 void *cb_header_ptr;
  22
  23 static void cb_parse_dma(void *ptr)
  24 {
  25         struct lb_range *dma = (struct lb_range *)ptr;
  26         init_dma_memory(bus_to_virt(dma->range_start), dma->range_size);
  27 }
  28
  29 /* Architecture specific */
  30 int cb_parse_arch_specific(struct cb_record *rec, struct sysinfo_t *info)
  31 {
  32         switch (rec->tag) {
  33         case CB_TAG_DMA:
  34                 cb_parse_dma(rec);
  35                 break;
  36         default:
  37                 return 0;
  38         }
  39         return 1;
  40
  41 }
  42
  43 int get_coreboot_info(struct sysinfo_t *info)
  44 {
  45         return cb_parse_header(cb_header_ptr, 1, info);
  46 }
  47
  48 void *get_cb_header_ptr(void)
  49 {
  50         return cb_header_ptr;
  51 }