acpi: x86: Move MADT to common code

Write MADT in common code and let the SoC fill out the body by
calling acpi_fill_madt() which must be implemented at SoC level.

Signed-off-by: Patrick Rudolph <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Bin Meng <[email protected]>

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 9eb0b507a09..639d78125f6 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -240,6 +240,37 @@ int acpi_write_fadt(struct acpi_ctx *ctx, const struct acpi_writer *entry)
 
 ACPI_WRITER(5fadt, "FADT", acpi_write_fadt, 0);
 
+int acpi_write_madt(struct acpi_ctx *ctx, const struct acpi_writer *entry)
+{
+	struct acpi_table_header *header;
+	struct acpi_madt *madt;
+	void *current;
+
+	madt = ctx->current;
+
+	memset(madt, '\0', sizeof(struct acpi_madt));
+	header = &madt->header;
+
+	/* Fill out header fields */
+	acpi_fill_header(header, "APIC");
+	header->length = sizeof(struct acpi_madt);
+	header->revision = ACPI_MADT_REV_ACPI_3_0;
+
+	acpi_inc(ctx, sizeof(struct acpi_madt));
+	current = acpi_fill_madt(madt, ctx);
+
+	/* (Re)calculate length and checksum */
+	header->length = (uintptr_t)current - (uintptr_t)madt;
+
+	header->checksum = table_compute_checksum((void *)madt, header->length);
+	acpi_add_table(ctx, madt);
+	ctx->current = (void *)madt + madt->header.length;
+
+	return 0;
+}
+
+ACPI_WRITER(5madt, "MADT", acpi_write_madt, 0);
+
 void acpi_create_dbg2(struct acpi_dbg2_header *dbg2,
 		      int port_type, int port_subtype,
 		      struct acpi_gen_regaddr *address, u32 address_size,