x86_64/amd64: ACPI support for the AMD64 BSP

- Implements necessary ACPICA OS Services Layer interfaces;
- Retrieve the RSDP from the FreeBSD Bootloader for amd64 or from multiboot2 for amd64efi;
- Add ACPI initialization routine;
- Use ACPI in bsp_reset.

spec/build/bsps/x86_64/amd64/bspamd64.yml

@@ -18,4 +18,5 @@ links:
 source:
 - bsps/x86_64/amd64/clock/clock.c
 - bsps/x86_64/amd64/console/console.c
+- bsps/x86_64/amd64/start/freebsd_loader.c
 type: build

spec/build/bsps/x86_64/amd64/grp.yml

@@ -24,6 +24,8 @@ links:
   uid: ../../objirq
 - role: build-dependency
   uid: ../../objmem
+- role: build-dependency
+  uid: ../../objacpi
 - role: build-dependency
   uid: ../../bspopts
 type: build

spec/build/bsps/x86_64/amd64/obj.yml

@@ -10,11 +10,17 @@ includes: []
 install:
 - destination: ${BSP_INCLUDEDIR}
   source:
-  - bsps/x86_64/amd64/include/apic.h
   - bsps/x86_64/amd64/include/bsp.h
   - bsps/x86_64/amd64/include/clock.h
+  - bsps/x86_64/amd64/include/freebsd_loader.h
   - bsps/x86_64/amd64/include/pic.h
   - bsps/x86_64/amd64/include/start.h
+- destination: ${BSP_INCLUDEDIR}/acpi
+  source:
+  - bsps/x86_64/amd64/include/acpi/acpi.h
+- destination: ${BSP_INCLUDEDIR}/acpi/acpica/platform
+  source:
+  - bsps/x86_64/amd64/include/acpi/acpica/platform/acrtems.h
 - destination: ${BSP_LIBDIR}
   source:
   - bsps/x86_64/amd64/start/linkcmds
@@ -29,6 +35,12 @@ source:
 - bsps/shared/start/bspfatal-default.c
 - bsps/shared/start/gettargethash-default.c
 - bsps/shared/start/sbrk.c
+- bsps/x86_64/amd64/acpi/acpi.c
+- bsps/x86_64/amd64/acpi/osl/osl_environment.c
+- bsps/x86_64/amd64/acpi/osl/osl_hardware.c
+- bsps/x86_64/amd64/acpi/osl/osl_interrupts.c
+- bsps/x86_64/amd64/acpi/osl/osl_memory.c
+- bsps/x86_64/amd64/acpi/osl/osl_tables.c
 - bsps/x86_64/amd64/interrupts/idt.c
 - bsps/x86_64/amd64/interrupts/isr_handler.S
 - bsps/x86_64/amd64/interrupts/pic.c