[GSoC WIP] liblua: ACPICA Lua bindings

GSoC WIP under @bsdimp

Description:
Lua bindings for ACPICA in loader.
Currently working on AcpiEvaluateObject.

Future interface work involves:
AcpiWalkNamespace and callback functions
AcpiAttachData/DetachData

Sponsored by: Google Summer of Code 2025
Signed-off-by: Kayla Powell (AKA Kat) <kpowkitty@FreeBSD.org>

Author: kpowkitty

stand/efi/loader/Makefile

@@ -30,6 +30,65 @@ SRCS=	autoload.c \
 	gfx_fb.c \
 	8x16.c
 
+# ACPICA Loader Initialization
+SRCS+= acpi_detect.c
+
+.if ${MACHINE_ARCH} == "amd64"
+SRCS+= OsdMemory.c osunixxf.c
+
+.PATH: ${.CURDIR}/../acpica/amd64/Osd/
+.PATH: ${.CURDIR}/../contrib/dev/acpica/os_specific/service_layers
+
+CFLAGS+=	-DACPI_SINGLE_THREADED \
+		-DACPI_USE_NATIVE_RSDP_POINTER \
+		-DACPI_USE_NATIVE_MEMORY_MAPPING \
+		-DACPI_REDUCED_HARDWARE \
+		-DACPI_EXCLUDE \
+		-DACPI_DEBUG_OUTPUT
+
+SRCS+=	libefi.c utinit.c utglobal.c utresrc.c utlock.c utownerid.c \
+	utcopy.c uthex.c utmath.c utstrsuppt.c utstrtoul64.c utpredef.c \
+	uterror.c uteval.c utids.c utbuffer.c utmisc.c utalloc.c utxferror.c \
+	utexcep.c utaddress.c utascii.c utcache.c utcksum.c utdebug.c \
+	utdecode.c utdelete.c utmutex.c utobject.c utosi.c utstring.c \
+	utxfinit.c utnonansi.c utstate.c tbxfload.c tbdata.c tbfadt.c \
+	tbinstal.c tbprint.c tbutils.c tbxface.c tbxfroot.c tbfind.c \
+	nsxfobj.c nsxfeval.c nsinit.c nsparse.c nsload.c nsrepair2.c \
+	nsconvert.c nsrepair.c nsprepkg.c nsarguments.c nseval.c nsxfname.c \
+	nsdump.c nswalk.c nssearch.c nsnames.c nsutils.c nsaccess.c nsalloc.c \
+	nsobject.c nspredef.c dsinit.c dsfield.c dspkginit.c dsopcode.c \
+	dsdebug.c dsmethod.c dscontrol.c dsobject.c dsutils.c dswexec.c \
+	dswload2.c dswload.c dsmthdat.c dswstate.c dsargs.c dswscope.c \
+	exregion.c exfldio.c exserial.c exstorob.c exstoren.c exdebug.c \
+	exmutex.c exconcat.c exmisc.c exconfig.c excreate.c exoparg6.c \
+	exoparg3.c exoparg2.c exoparg1.c exdump.c exprep.c exresop.c \
+	exsystem.c exnames.c exresolv.c exstore.c exfield.c exconvrt.c \
+	exresnte.c exutils.c extrace.c hwpci.c hwregs.c hwxface.c hwvalid.c \
+	hwacpi.c evmisc.c evregion.c evrgnini.c evxface.c evevent.c evxfevnt.c \
+	evhandler.c evxfregn.c psobject.c psloop.c pstree.c pswalk.c psopinfo.c \
+	psscope.c psutils.c psargs.c psparse.c psxface.c psopcode.c init_acpi.c
+
+# lua
+.PATH: ${.CURDIR}/../../liblua/acpi
+SRCS+= lacpi.c
+CFLAGS+= -I${.CURDIR}/../../liblua/acpi 
+.endif
+
+.PATH: ${.CURDIR}/../libefi
+.PATH: ${.CURDIR}/../acpica
+.PATH: ${.CURDIR}/../contrib/dev/acpica/components/utilities
+.PATH: ${.CURDIR}/../contrib/dev/acpica/components/hardware
+.PATH: ${.CURDIR}/../contrib/dev/acpica/components/events
+.PATH: ${SYSDIR}/contrib/dev/acpica/os_specific/service_layers
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/tables
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/namespace
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/utilities
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/dispatcher
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/executer
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/hardware
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/events
+.PATH: ${SYSDIR}/contrib/dev/acpica/components/parser
+
 CFLAGS+=	-I${.CURDIR}/../loader
 .if ${MK_LOADER_ZFS} != "no"
 CFLAGS+=	-I${ZFSSRC}

stand/liblua/Makefile

@@ -29,6 +29,11 @@ SRCS+=	lfs.c
 .PATH:	${FLUALIB}/libhash
 SRCS+=	lhash.c
 
+# ACPI
+.PATH: ${LIBLUASRC}/acpi ${EFISRC}/acpica
+SRCS+=  lacpi_object.c init_acpi.c
+CFLAGS+= -I${LIBLUASRC}/acpi -I${EFISRC}/acpica/include -I${SYSDIR}/contrib/dev/acpica/include
+
 WARNS?=	3
 
 CFLAGS+= -DLUA_PATH=\"${LUAPATH}\" -DLUA_PATH_DEFAULT=\"${LUAPATH}/\?.lua\"

stand/liblua/acpi/lacpi.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <lua.h>
+#include <sys/linker_set.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+
+typedef int (*lua_module_init_fn)(lua_State *L);
+
+struct lua_acpi_module {
+	const char *mod_name;
+	lua_module_init_fn init;
+};
+
+SET_DECLARE(lua_acpi_modules, struct lua_acpi_module);
+
+#define LUA_ACPI_COMPILE_SET(name, initfn)			\
+	static struct lua_acpi_module lua_##name =		\
+	{							\
+		.mod_name = #name,				\
+		.init = initfn					\
+	};							\
+	DATA_SET(lua_acpi_modules, lua_##name)
+
+extern struct lacpi_handle {
+	const char*	pathname;
+	ACPI_HANDLE 	handle;
+};

stand/liblua/acpi/lacpi_factory.c

@@ -0,0 +1,17 @@
+#include <lua.h>
+#include <lauxlib.h>
+#include <lualib.h>
+
+int
+lacpi_create_mt_gc(lua_State *L, const char *mt, lua_CFunction gc_func)
+{
+	if (luaL_newmetatable(L, mt)) {
+		lua_pushcfunction(L, gc_func);
+		lua_setfield(L, -2, "__gc");
+
+		lua_pushvalue(L, -1);
+		lua_setfield(L, -2, "__index");
+	}
+
+	return 1;
+}

stand/liblua/acpi/lacpi_factory.h

@@ -0,0 +1,3 @@
+#pragma once
+
+int lacpi_create_mt_gc(lua_State *L, const char *mt, lua_CFunction gc_func);