| 1 | /* |
| 2 | * i386 TCG cpu class initialization functions specific to system emulation |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include "qemu/osdep.h" |
| 21 | #include "cpu.h" |
| 22 | #include "tcg/helper-tcg.h" |
| 23 | |
| 24 | #include "system/system.h" |
| 25 | #include "qemu/units.h" |
| 26 | #include "system/address-spaces.h" |
| 27 | #include "system/memory.h" |
| 28 | |
| 29 | #include "tcg/tcg-cpu.h" |
| 30 | |
| 31 | static void tcg_cpu_machine_done(Notifier *n, void *unused) |
| 32 | { |
| 33 | X86CPU *cpu = container_of(n, X86CPU, machine_done); |
| 34 | MemoryRegion *smram = |
| 35 | (MemoryRegion *) object_resolve_path("/machine/smram", NULL); |
| 36 | |
| 37 | if (smram) { |
| 38 | cpu->smram = g_new(MemoryRegion, 1); |
| 39 | memory_region_init_alias(cpu->smram, OBJECT(cpu), "smram", |
| 40 | smram, 0, 4 * GiB); |
| 41 | memory_region_set_enabled(cpu->smram, true); |
| 42 | memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, |
| 43 | cpu->smram, 1); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | bool tcg_cpu_realizefn(CPUState *cs, Error **errp) |
| 48 | { |
| 49 | X86CPU *cpu = X86_CPU(cs); |
| 50 | |
| 51 | /* |
| 52 | * The realize order is important, since x86_cpu_realize() checks if |
| 53 | * nothing else has been set by the user (or by accelerators) in |
| 54 | * cpu->ucode_rev and cpu->phys_bits, and the memory regions |
| 55 | * initialized here are needed for the vcpu initialization. |
| 56 | * |
| 57 | * realize order: |
| 58 | * tcg_cpu -> host_cpu -> x86_cpu |
| 59 | */ |
| 60 | cpu->cpu_as_mem = g_new(MemoryRegion, 1); |
| 61 | cpu->cpu_as_root = g_new(MemoryRegion, 1); |
| 62 | |
| 63 | /* Outer container... */ |
| 64 | memory_region_init(cpu->cpu_as_root, OBJECT(cpu), "memory", ~0ull); |
| 65 | memory_region_set_enabled(cpu->cpu_as_root, true); |
| 66 | |
| 67 | /* |
| 68 | * ... with two regions inside: normal system memory with low |
| 69 | * priority, and... |
| 70 | */ |
| 71 | memory_region_init_alias(cpu->cpu_as_mem, OBJECT(cpu), "memory", |
| 72 | get_system_memory(), 0, ~0ull); |
| 73 | memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->cpu_as_mem, 0); |
| 74 | memory_region_set_enabled(cpu->cpu_as_mem, true); |
| 75 | |
| 76 | cpu_address_space_init(cs, X86ASIdx_MEM, "cpu-memory", cs->memory); |
| 77 | cpu_address_space_init(cs, X86ASIdx_SMM, "cpu-smm", cpu->cpu_as_root); |
| 78 | |
| 79 | /* ... SMRAM with higher priority, linked from /machine/smram. */ |
| 80 | cpu->machine_done.notify = tcg_cpu_machine_done; |
| 81 | qemu_add_machine_init_done_notifier(&cpu->machine_done); |
| 82 | return true; |
| 83 | } |