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-rw-r--r--target/i386/tcg/system/tcg-cpu.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/target/i386/tcg/system/tcg-cpu.c b/target/i386/tcg/system/tcg-cpu.c
new file mode 100644
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+++ b/target/i386/tcg/system/tcg-cpu.c
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+/*
+ * i386 TCG cpu class initialization functions specific to system emulation
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "tcg/helper-tcg.h"
+
+#include "system/system.h"
+#include "qemu/units.h"
+#include "exec/address-spaces.h"
+
+#include "tcg/tcg-cpu.h"
+
+static void tcg_cpu_machine_done(Notifier *n, void *unused)
+{
+ X86CPU *cpu = container_of(n, X86CPU, machine_done);
+ MemoryRegion *smram =
+ (MemoryRegion *) object_resolve_path("/machine/smram", NULL);
+
+ if (smram) {
+ cpu->smram = g_new(MemoryRegion, 1);
+ memory_region_init_alias(cpu->smram, OBJECT(cpu), "smram",
+ smram, 0, 4 * GiB);
+ memory_region_set_enabled(cpu->smram, true);
+ memory_region_add_subregion_overlap(cpu->cpu_as_root, 0,
+ cpu->smram, 1);
+ }
+}
+
+bool tcg_cpu_realizefn(CPUState *cs, Error **errp)
+{
+ X86CPU *cpu = X86_CPU(cs);
+
+ /*
+ * The realize order is important, since x86_cpu_realize() checks if
+ * nothing else has been set by the user (or by accelerators) in
+ * cpu->ucode_rev and cpu->phys_bits, and the memory regions
+ * initialized here are needed for the vcpu initialization.
+ *
+ * realize order:
+ * tcg_cpu -> host_cpu -> x86_cpu
+ */
+ cpu->cpu_as_mem = g_new(MemoryRegion, 1);
+ cpu->cpu_as_root = g_new(MemoryRegion, 1);
+
+ /* Outer container... */
+ memory_region_init(cpu->cpu_as_root, OBJECT(cpu), "memory", ~0ull);
+ memory_region_set_enabled(cpu->cpu_as_root, true);
+
+ /*
+ * ... with two regions inside: normal system memory with low
+ * priority, and...
+ */
+ memory_region_init_alias(cpu->cpu_as_mem, OBJECT(cpu), "memory",
+ get_system_memory(), 0, ~0ull);
+ memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->cpu_as_mem, 0);
+ memory_region_set_enabled(cpu->cpu_as_mem, true);
+
+ cs->num_ases = 2;
+ cpu_address_space_init(cs, 0, "cpu-memory", cs->memory);
+ cpu_address_space_init(cs, 1, "cpu-smm", cpu->cpu_as_root);
+
+ /* ... SMRAM with higher priority, linked from /machine/smram. */
+ cpu->machine_done.notify = tcg_cpu_machine_done;
+ qemu_add_machine_init_done_notifier(&cpu->machine_done);
+ return true;
+}