acpigen: Support writing a package
A package collects together several elements. Add an easy way of writing
a package header and updating its length later.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c
index 11fc384..9043c2b 100644
--- a/lib/acpi/acpigen.c
+++ b/lib/acpi/acpigen.c
@@ -71,6 +71,18 @@
p[2] = len >> 12 & 0xff;
}
+char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el)
+{
+ char *p;
+
+ acpigen_emit_byte(ctx, PACKAGE_OP);
+ acpigen_write_len_f(ctx);
+ p = ctx->current;
+ acpigen_emit_byte(ctx, nr_el);
+
+ return p;
+}
+
void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size)
{
int i;