hw/smbios/smbios_build.h

   1 /*
   2  * SMBIOS Support
   3  *
   4  * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
   5  * Copyright (C) 2013 Red Hat, Inc.
   6  *
   7  * Authors:
   8  *  Alex Williamson <alex.williamson@hp.com>
   9  *  Markus Armbruster <armbru@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #ifndef QEMU_SMBIOS_BUILD_H
  19 #define QEMU_SMBIOS_BUILD_H
  20
  21 bool smbios_skip_table(uint8_t type, bool required_table);
  22
  23 extern uint8_t *smbios_tables;
  24 extern size_t smbios_tables_len;
  25 extern unsigned smbios_table_max;
  26 extern unsigned smbios_table_cnt;
  27
  28 #define SMBIOS_BUILD_TABLE_PRE(tbl_type, tbl_handle, tbl_required)        \
  29     struct smbios_type_##tbl_type *t;                                     \
  30     size_t t_off; /* table offset into smbios_tables */                   \
  31     int str_index = 0;                                                    \
  32     do {                                                                  \
  33         /* should we skip building this table ? */                        \
  34         if (smbios_skip_table(tbl_type, tbl_required)) {                  \
  35             return;                                                       \
  36         }                                                                 \
  37                                                                           \
  38         /* use offset of table t within smbios_tables */                  \
  39         /* (pointer must be updated after each realloc) */                \
  40         t_off = smbios_tables_len;                                        \
  41         smbios_tables_len += sizeof(*t);                                  \
  42         smbios_tables = g_realloc(smbios_tables, smbios_tables_len);      \
  43         t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off);     \
  44                                                                           \
  45         t->header.type = tbl_type;                                        \
  46         t->header.length = sizeof(*t);                                    \
  47         t->header.handle = cpu_to_le16(tbl_handle);                       \
  48     } while (0)
  49
  50 #define SMBIOS_TABLE_SET_STR(tbl_type, field, value)                      \
  51     do {                                                                  \
  52         int len = (value != NULL) ? strlen(value) + 1 : 0;                \
  53         if (len > 1) {                                                    \
  54             smbios_tables = g_realloc(smbios_tables,                      \
  55                                       smbios_tables_len + len);           \
  56             memcpy(smbios_tables + smbios_tables_len, value, len);        \
  57             smbios_tables_len += len;                                     \
  58             /* update pointer post-realloc */                             \
  59             t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off); \
  60             t->field = ++str_index;                                       \
  61         } else {                                                          \
  62             t->field = 0;                                                 \
  63         }                                                                 \
  64     } while (0)
  65
  66 #define SMBIOS_BUILD_TABLE_POST                                           \
  67     do {                                                                  \
  68         size_t term_cnt, t_size;                                          \
  69                                                                           \
  70         /* add '\0' terminator (add two if no strings defined) */         \
  71         term_cnt = (str_index == 0) ? 2 : 1;                              \
  72         smbios_tables = g_realloc(smbios_tables,                          \
  73                                   smbios_tables_len + term_cnt);          \
  74         memset(smbios_tables + smbios_tables_len, 0, term_cnt);           \
  75         smbios_tables_len += term_cnt;                                    \
  76                                                                           \
  77         /* update smbios max. element size */                             \
  78         t_size = smbios_tables_len - t_off;                               \
  79         if (t_size > smbios_table_max) {                                  \
  80             smbios_table_max = t_size;                                    \
  81         }                                                                 \
  82                                                                           \
  83         /* update smbios element count */                                 \
  84         smbios_table_cnt++;                                               \
  85     } while (0)
  86
  87 #endif /* QEMU_SMBIOS_BUILD_H */