2 * TI OMAP L4 interconnect emulation.
4 * Copyright (C) 2007-2009 Nokia Corporation
5 * Written by Andrzej Zaborowski <andrew@openedhand.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 or
10 * (at your option) any later version of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "hw/arm/omap.h"
24 MemoryRegion
*address_space
;
27 struct omap_target_agent_s ta
[0];
30 struct omap_l4_s
*omap_l4_init(MemoryRegion
*address_space
,
31 hwaddr base
, int ta_num
)
33 struct omap_l4_s
*bus
= g_malloc0(
34 sizeof(*bus
) + ta_num
* sizeof(*bus
->ta
));
36 bus
->address_space
= address_space
;
43 hwaddr
omap_l4_region_base(struct omap_target_agent_s
*ta
,
46 return ta
->bus
->base
+ ta
->start
[region
].offset
;
49 hwaddr
omap_l4_region_size(struct omap_target_agent_s
*ta
,
52 return ta
->start
[region
].size
;
55 static uint64_t omap_l4ta_read(void *opaque
, hwaddr addr
,
58 struct omap_target_agent_s
*s
= (struct omap_target_agent_s
*) opaque
;
61 return omap_badwidth_read16(opaque
, addr
);
65 case 0x00: /* COMPONENT */
68 case 0x20: /* AGENT_CONTROL */
71 case 0x28: /* AGENT_STATUS */
79 static void omap_l4ta_write(void *opaque
, hwaddr addr
,
80 uint64_t value
, unsigned size
)
82 struct omap_target_agent_s
*s
= (struct omap_target_agent_s
*) opaque
;
85 omap_badwidth_write32(opaque
, addr
, value
);
90 case 0x00: /* COMPONENT */
91 case 0x28: /* AGENT_STATUS */
95 case 0x20: /* AGENT_CONTROL */
96 s
->control
= value
& 0x01000700;
97 if (value
& 1) /* OCP_RESET */
98 s
->status
&= ~1; /* REQ_TIMEOUT */
106 static const MemoryRegionOps omap_l4ta_ops
= {
107 .read
= omap_l4ta_read
,
108 .write
= omap_l4ta_write
,
109 .endianness
= DEVICE_NATIVE_ENDIAN
,
112 struct omap_target_agent_s
*omap_l4ta_get(struct omap_l4_s
*bus
,
113 const struct omap_l4_region_s
*regions
,
114 const struct omap_l4_agent_info_s
*agents
,
118 struct omap_target_agent_s
*ta
= NULL
;
119 const struct omap_l4_agent_info_s
*info
= NULL
;
121 for (i
= 0; i
< bus
->ta_num
; i
++)
122 if (agents
[i
].ta
== cs
) {
128 fprintf(stderr
, "%s: bad target agent (%i)\n", __func__
, cs
);
133 ta
->start
= ®ions
[info
->region
];
134 ta
->regions
= info
->regions
;
136 ta
->component
= ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0);
137 ta
->status
= 0x00000000;
138 ta
->control
= 0x00000200; /* XXX 01000200 for L4TAO */
140 memory_region_init_io(&ta
->iomem
, NULL
, &omap_l4ta_ops
, ta
, "omap.l4ta",
141 omap_l4_region_size(ta
, info
->ta_region
));
142 omap_l4_attach(ta
, info
->ta_region
, &ta
->iomem
);
147 hwaddr
omap_l4_attach(struct omap_target_agent_s
*ta
,
148 int region
, MemoryRegion
*mr
)
152 if (region
< 0 || region
>= ta
->regions
) {
153 fprintf(stderr
, "%s: bad io region (%i)\n", __func__
, region
);
157 base
= ta
->bus
->base
+ ta
->start
[region
].offset
;
159 memory_region_add_subregion(ta
->bus
->address_space
, base
, mr
);