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/*
* TI OMAP L4 interconnect emulation.
*
* Copyright (C) 2007-2009 Nokia Corporation
* Written by Andrzej Zaborowski <andrew@openedhand.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 or
* (at your option) any later version of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/arm/omap.h"
struct omap_l4_s {
MemoryRegion *address_space;
hwaddr base;
int ta_num;
struct omap_target_agent_s ta[];
};
struct omap_l4_s *omap_l4_init(MemoryRegion *address_space,
hwaddr base, int ta_num)
{
struct omap_l4_s *bus = g_malloc0(
sizeof(*bus) + ta_num * sizeof(*bus->ta));
bus->address_space = address_space;
bus->ta_num = ta_num;
bus->base = base;
return bus;
}
hwaddr omap_l4_region_base(struct omap_target_agent_s *ta,
int region)
{
return ta->bus->base + ta->start[region].offset;
}
hwaddr omap_l4_region_size(struct omap_target_agent_s *ta,
int region)
{
return ta->start[region].size;
}
static uint64_t omap_l4ta_read(void *opaque, hwaddr addr, unsigned size)
{
struct omap_target_agent_s *s = opaque;
if (size != 2) {
return omap_badwidth_read16(opaque, addr);
}
switch (addr) {
case 0x00: /* COMPONENT */
return s->component;
case 0x20: /* AGENT_CONTROL */
return s->control;
case 0x28: /* AGENT_STATUS */
return s->status;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_l4ta_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
struct omap_target_agent_s *s = opaque;
if (size != 4) {
omap_badwidth_write32(opaque, addr, value);
return;
}
switch (addr) {
case 0x00: /* COMPONENT */
case 0x28: /* AGENT_STATUS */
OMAP_RO_REG(addr);
break;
case 0x20: /* AGENT_CONTROL */
s->control = value & 0x01000700;
if (value & 1) /* OCP_RESET */
s->status &= ~1; /* REQ_TIMEOUT */
break;
default:
OMAP_BAD_REG(addr);
}
}
static const MemoryRegionOps omap_l4ta_ops = {
.read = omap_l4ta_read,
.write = omap_l4ta_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
struct omap_target_agent_s *omap_l4ta_get(struct omap_l4_s *bus,
const struct omap_l4_region_s *regions,
const struct omap_l4_agent_info_s *agents,
int cs)
{
int i;
struct omap_target_agent_s *ta = NULL;
const struct omap_l4_agent_info_s *info = NULL;
for (i = 0; i < bus->ta_num; i ++)
if (agents[i].ta == cs) {
ta = &bus->ta[i];
info = &agents[i];
break;
}
if (!ta) {
fprintf(stderr, "%s: bad target agent (%i)\n", __func__, cs);
exit(-1);
}
ta->bus = bus;
ta->start = ®ions[info->region];
ta->regions = info->regions;
ta->component = ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0);
ta->status = 0x00000000;
ta->control = 0x00000200; /* XXX 01000200 for L4TAO */
memory_region_init_io(&ta->iomem, NULL, &omap_l4ta_ops, ta, "omap.l4ta",
omap_l4_region_size(ta, info->ta_region));
omap_l4_attach(ta, info->ta_region, &ta->iomem);
return ta;
}
hwaddr omap_l4_attach(struct omap_target_agent_s *ta,
int region, MemoryRegion *mr)
{
hwaddr base;
if (region < 0 || region >= ta->regions) {
fprintf(stderr, "%s: bad io region (%i)\n", __func__, region);
exit(-1);
}
base = ta->bus->base + ta->start[region].offset;
if (mr) {
memory_region_add_subregion(ta->bus->address_space, base, mr);
}
return base;
}
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