aboutsummaryrefslogtreecommitdiff
path: root/hw/omap_l4.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/omap_l4.c')
-rw-r--r--hw/omap_l4.c271
1 files changed, 271 insertions, 0 deletions
diff --git a/hw/omap_l4.c b/hw/omap_l4.c
new file mode 100644
index 0000000000..bf8ba36e99
--- /dev/null
+++ b/hw/omap_l4.c
@@ -0,0 +1,271 @@
+/*
+ * 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.h"
+#include "omap.h"
+
+#ifdef L4_MUX_HACK
+static int omap_l4_io_entries;
+static int omap_cpu_io_entry;
+static struct omap_l4_entry {
+ CPUReadMemoryFunc * const *mem_read;
+ CPUWriteMemoryFunc * const *mem_write;
+ void *opaque;
+} *omap_l4_io_entry;
+static CPUReadMemoryFunc * const *omap_l4_io_readb_fn;
+static CPUReadMemoryFunc * const *omap_l4_io_readh_fn;
+static CPUReadMemoryFunc * const *omap_l4_io_readw_fn;
+static CPUWriteMemoryFunc * const *omap_l4_io_writeb_fn;
+static CPUWriteMemoryFunc * const *omap_l4_io_writeh_fn;
+static CPUWriteMemoryFunc * const *omap_l4_io_writew_fn;
+static void **omap_l4_io_opaque;
+
+int l4_register_io_memory(CPUReadMemoryFunc * const *mem_read,
+ CPUWriteMemoryFunc * const *mem_write, void *opaque)
+{
+ omap_l4_io_entry[omap_l4_io_entries].mem_read = mem_read;
+ omap_l4_io_entry[omap_l4_io_entries].mem_write = mem_write;
+ omap_l4_io_entry[omap_l4_io_entries].opaque = opaque;
+
+ return omap_l4_io_entries ++;
+}
+
+static uint32_t omap_l4_io_readb(void *opaque, target_phys_addr_t addr)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_readb_fn[i](omap_l4_io_opaque[i], addr);
+}
+
+static uint32_t omap_l4_io_readh(void *opaque, target_phys_addr_t addr)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_readh_fn[i](omap_l4_io_opaque[i], addr);
+}
+
+static uint32_t omap_l4_io_readw(void *opaque, target_phys_addr_t addr)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_readw_fn[i](omap_l4_io_opaque[i], addr);
+}
+
+static void omap_l4_io_writeb(void *opaque, target_phys_addr_t addr,
+ uint32_t value)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_writeb_fn[i](omap_l4_io_opaque[i], addr, value);
+}
+
+static void omap_l4_io_writeh(void *opaque, target_phys_addr_t addr,
+ uint32_t value)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_writeh_fn[i](omap_l4_io_opaque[i], addr, value);
+}
+
+static void omap_l4_io_writew(void *opaque, target_phys_addr_t addr,
+ uint32_t value)
+{
+ unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS;
+
+ return omap_l4_io_writew_fn[i](omap_l4_io_opaque[i], addr, value);
+}
+
+static CPUReadMemoryFunc * const omap_l4_io_readfn[] = {
+ omap_l4_io_readb,
+ omap_l4_io_readh,
+ omap_l4_io_readw,
+};
+
+static CPUWriteMemoryFunc * const omap_l4_io_writefn[] = {
+ omap_l4_io_writeb,
+ omap_l4_io_writeh,
+ omap_l4_io_writew,
+};
+#else
+int l4_register_io_memory(CPUReadMemoryFunc * const *mem_read,
+ CPUWriteMemoryFunc * const *mem_write,
+ void *opaque)
+{
+ return cpu_register_io_memory(mem_read, mem_write, opaque);
+}
+#endif
+
+struct omap_l4_s {
+ target_phys_addr_t base;
+ int ta_num;
+ struct omap_target_agent_s ta[0];
+};
+
+struct omap_l4_s *omap_l4_init(target_phys_addr_t base, int ta_num)
+{
+ struct omap_l4_s *bus = qemu_mallocz(
+ sizeof(*bus) + ta_num * sizeof(*bus->ta));
+
+ bus->ta_num = ta_num;
+ bus->base = base;
+
+#ifdef L4_MUX_HACK
+ omap_l4_io_entries = 1;
+ omap_l4_io_entry = qemu_mallocz(125 * sizeof(*omap_l4_io_entry));
+
+ omap_cpu_io_entry =
+ cpu_register_io_memory(omap_l4_io_readfn,
+ omap_l4_io_writefn, bus);
+# define L4_PAGES (0xb4000 / TARGET_PAGE_SIZE)
+ omap_l4_io_readb_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_readh_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_readw_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_writeb_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_writeh_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_writew_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
+ omap_l4_io_opaque = qemu_mallocz(sizeof(void *) * L4_PAGES);
+#endif
+
+ return bus;
+}
+
+static uint32_t omap_l4ta_read(void *opaque, target_phys_addr_t addr)
+{
+ struct omap_target_agent_s *s = (struct omap_target_agent_s *) opaque;
+
+ 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, target_phys_addr_t addr,
+ uint32_t value)
+{
+ struct omap_target_agent_s *s = (struct omap_target_agent_s *) opaque;
+
+ 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 CPUReadMemoryFunc * const omap_l4ta_readfn[] = {
+ omap_badwidth_read16,
+ omap_l4ta_read,
+ omap_badwidth_read16,
+};
+
+static CPUWriteMemoryFunc * const omap_l4ta_writefn[] = {
+ omap_badwidth_write32,
+ omap_badwidth_write32,
+ omap_l4ta_write,
+};
+
+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, iomemtype;
+ 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 */
+
+ iomemtype = l4_register_io_memory(omap_l4ta_readfn,
+ omap_l4ta_writefn, ta);
+ ta->base = omap_l4_attach(ta, info->ta_region, iomemtype);
+
+ return ta;
+}
+
+target_phys_addr_t omap_l4_attach(struct omap_target_agent_s *ta, int region,
+ int iotype)
+{
+ target_phys_addr_t base;
+ ssize_t size;
+#ifdef L4_MUX_HACK
+ int i;
+#endif
+
+ 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;
+ size = ta->start[region].size;
+ if (iotype) {
+#ifndef L4_MUX_HACK
+ cpu_register_physical_memory(base, size, iotype);
+#else
+ cpu_register_physical_memory(base, size, omap_cpu_io_entry);
+ i = (base - ta->bus->base) / TARGET_PAGE_SIZE;
+ for (; size > 0; size -= TARGET_PAGE_SIZE, i ++) {
+ omap_l4_io_readb_fn[i] = omap_l4_io_entry[iotype].mem_read[0];
+ omap_l4_io_readh_fn[i] = omap_l4_io_entry[iotype].mem_read[1];
+ omap_l4_io_readw_fn[i] = omap_l4_io_entry[iotype].mem_read[2];
+ omap_l4_io_writeb_fn[i] = omap_l4_io_entry[iotype].mem_write[0];
+ omap_l4_io_writeh_fn[i] = omap_l4_io_entry[iotype].mem_write[1];
+ omap_l4_io_writew_fn[i] = omap_l4_io_entry[iotype].mem_write[2];
+ omap_l4_io_opaque[i] = omap_l4_io_entry[iotype].opaque;
+ }
+#endif
+ }
+
+ return base;
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 13:45:15 +0000