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-rw-r--r--qemu/hw/misc/omap_l4.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/qemu/hw/misc/omap_l4.c b/qemu/hw/misc/omap_l4.c
new file mode 100644
index 000000000..245ceac84
--- /dev/null
+++ b/qemu/hw/misc/omap_l4.c
@@ -0,0 +1,163 @@
+/*
+ * 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 "hw/hw.h"
+#include "hw/arm/omap.h"
+
+struct omap_l4_s {
+ MemoryRegion *address_space;
+ hwaddr base;
+ int ta_num;
+ struct omap_target_agent_s ta[0];
+};
+
+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 = (struct omap_target_agent_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 = (struct omap_target_agent_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", __FUNCTION__, cs);
+ exit(-1);
+ }
+
+ ta->bus = bus;
+ ta->start = &regions[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", __FUNCTION__, 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;
+}