tests/libqos/fw_cfg.c

   1 /*
   2  * libqos fw_cfg support
   3  *
   4  * Copyright IBM, Corp. 2012-2013
   5  * Copyright (C) 2013 Red Hat Inc.
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Markus Armbruster <armbru@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "libqos/fw_cfg.h"
  17 #include "libqtest.h"
  18 #include "qemu/bswap.h"
  19
  20 void qfw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
  21 {
  22     fw_cfg->select(fw_cfg, key);
  23 }
  24
  25 void qfw_cfg_read_data(QFWCFG *fw_cfg, void *data, size_t len)
  26 {
  27     fw_cfg->read(fw_cfg, data, len);
  28 }
  29
  30 void qfw_cfg_get(QFWCFG *fw_cfg, uint16_t key, void *data, size_t len)
  31 {
  32     qfw_cfg_select(fw_cfg, key);
  33     qfw_cfg_read_data(fw_cfg, data, len);
  34 }
  35
  36 uint16_t qfw_cfg_get_u16(QFWCFG *fw_cfg, uint16_t key)
  37 {
  38     uint16_t value;
  39     qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
  40     return le16_to_cpu(value);
  41 }
  42
  43 uint32_t qfw_cfg_get_u32(QFWCFG *fw_cfg, uint16_t key)
  44 {
  45     uint32_t value;
  46     qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
  47     return le32_to_cpu(value);
  48 }
  49
  50 uint64_t qfw_cfg_get_u64(QFWCFG *fw_cfg, uint16_t key)
  51 {
  52     uint64_t value;
  53     qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
  54     return le64_to_cpu(value);
  55 }
  56
  57 static void mm_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
  58 {
  59     writew(fw_cfg->base, key);
  60 }
  61
  62 static void mm_fw_cfg_read(QFWCFG *fw_cfg, void *data, size_t len)
  63 {
  64     uint8_t *ptr = data;
  65     int i;
  66
  67     for (i = 0; i < len; i++) {
  68         ptr[i] = readb(fw_cfg->base + 2);
  69     }
  70 }
  71
  72 QFWCFG *mm_fw_cfg_init(uint64_t base)
  73 {
  74     QFWCFG *fw_cfg = g_malloc0(sizeof(*fw_cfg));
  75
  76     fw_cfg->base = base;
  77     fw_cfg->select = mm_fw_cfg_select;
  78     fw_cfg->read = mm_fw_cfg_read;
  79
  80     return fw_cfg;
  81 }
  82
  83 static void io_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
  84 {
  85     outw(fw_cfg->base, key);
  86 }
  87
  88 static void io_fw_cfg_read(QFWCFG *fw_cfg, void *data, size_t len)
  89 {
  90     uint8_t *ptr = data;
  91     int i;
  92
  93     for (i = 0; i < len; i++) {
  94         ptr[i] = inb(fw_cfg->base + 1);
  95     }
  96 }
  97
  98 QFWCFG *io_fw_cfg_init(uint16_t base)
  99 {
 100     QFWCFG *fw_cfg = g_malloc0(sizeof(*fw_cfg));
 101
 102     fw_cfg->base = base;
 103     fw_cfg->select = io_fw_cfg_select;
 104     fw_cfg->read = io_fw_cfg_read;
 105
 106     return fw_cfg;
 107 }