diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h
index 62044cd5b7bc..c5108213876c 100644
--- a/arch/loongarch/include/asm/acpi.h
+++ b/arch/loongarch/include/asm/acpi.h
@@ -31,6 +31,148 @@ static inline bool acpi_has_cpu_in_madt(void)
 
 extern struct list_head acpi_wakeup_device_list;
 
+/*
+ * Temporary definitions until the core ACPICA code gets updated (see
+ * 1656837932-18257-1-git-send-email-lvjianmin@loongson.cn and its
+ * follow-ups for the "rationale").
+ *
+ * Once the "legal reasons" are cleared and that the code is merged,
+ * this can be dropped entierely.
+ */
+#if (ACPI_CA_VERSION == 0x20220331 && !defined(LOONGARCH_ACPICA_EXT))
+
+#define LOONGARCH_ACPICA_EXT	1
+
+#define	ACPI_MADT_TYPE_CORE_PIC		17
+#define	ACPI_MADT_TYPE_LIO_PIC		18
+#define	ACPI_MADT_TYPE_HT_PIC		19
+#define	ACPI_MADT_TYPE_EIO_PIC		20
+#define	ACPI_MADT_TYPE_MSI_PIC		21
+#define	ACPI_MADT_TYPE_BIO_PIC		22
+#define	ACPI_MADT_TYPE_LPC_PIC		23
+
+/* Values for Version field above */
+
+enum acpi_madt_core_pic_version {
+	ACPI_MADT_CORE_PIC_VERSION_NONE = 0,
+	ACPI_MADT_CORE_PIC_VERSION_V1 = 1,
+	ACPI_MADT_CORE_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_lio_pic_version {
+	ACPI_MADT_LIO_PIC_VERSION_NONE = 0,
+	ACPI_MADT_LIO_PIC_VERSION_V1 = 1,
+	ACPI_MADT_LIO_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_eio_pic_version {
+	ACPI_MADT_EIO_PIC_VERSION_NONE = 0,
+	ACPI_MADT_EIO_PIC_VERSION_V1 = 1,
+	ACPI_MADT_EIO_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_ht_pic_version {
+	ACPI_MADT_HT_PIC_VERSION_NONE = 0,
+	ACPI_MADT_HT_PIC_VERSION_V1 = 1,
+	ACPI_MADT_HT_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_bio_pic_version {
+	ACPI_MADT_BIO_PIC_VERSION_NONE = 0,
+	ACPI_MADT_BIO_PIC_VERSION_V1 = 1,
+	ACPI_MADT_BIO_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_msi_pic_version {
+	ACPI_MADT_MSI_PIC_VERSION_NONE = 0,
+	ACPI_MADT_MSI_PIC_VERSION_V1 = 1,
+	ACPI_MADT_MSI_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+enum acpi_madt_lpc_pic_version {
+	ACPI_MADT_LPC_PIC_VERSION_NONE = 0,
+	ACPI_MADT_LPC_PIC_VERSION_V1 = 1,
+	ACPI_MADT_LPC_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
+};
+
+#pragma pack(1)
+
+/* Core Interrupt Controller */
+
+struct acpi_madt_core_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u32 processor_id;
+	u32 core_id;
+	u32 flags;
+};
+
+/* Legacy I/O Interrupt Controller */
+
+struct acpi_madt_lio_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u64 address;
+	u16 size;
+	u8 cascade[2];
+	u32 cascade_map[2];
+};
+
+/* Extend I/O Interrupt Controller */
+
+struct acpi_madt_eio_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u8 cascade;
+	u8 node;
+	u64 node_map;
+};
+
+/* HT Interrupt Controller */
+
+struct acpi_madt_ht_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u64 address;
+	u16 size;
+	u8 cascade[8];
+};
+
+/* Bridge I/O Interrupt Controller */
+
+struct acpi_madt_bio_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u64 address;
+	u16 size;
+	u16 id;
+	u16 gsi_base;
+};
+
+/* MSI Interrupt Controller */
+
+struct acpi_madt_msi_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u64 msg_address;
+	u32 start;
+	u32 count;
+};
+
+/* LPC Interrupt Controller */
+
+struct acpi_madt_lpc_pic {
+	struct acpi_subtable_header header;
+	u8 version;
+	u64 address;
+	u16 size;
+	u8 cascade;
+};
+
+#pragma pack()
+
+#endif
+
 #endif /* !CONFIG_ACPI */
 
 #define ACPI_TABLE_UPGRADE_MAX_PHYS ARCH_LOW_ADDRESS_LIMIT