x86: linked list of setup_data for i386

This patch adds linked list of struct setup_data supported for i386.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: andi@firstfloor.org
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6f80b852a196..0a281f2c7157 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -137,3 +137,25 @@ void __init setup_per_cpu_areas(void)
 }
 
 #endif
+
+void __init parse_setup_data(void)
+{
+        struct setup_data *data;
+        u64 pa_data;
+
+        if (boot_params.hdr.version < 0x0209)
+                return;
+        pa_data = boot_params.hdr.setup_data;
+        while (pa_data) {
+                data = early_ioremap(pa_data, PAGE_SIZE);
+                switch (data->type) {
+                default:
+                        break;
+                }
+#ifndef CONFIG_DEBUG_BOOT_PARAMS
+                free_early(pa_data, pa_data+sizeof(*data)+data->len);
+#endif
+                pa_data = data->next;
+                early_iounmap(data, PAGE_SIZE);
+        }
+}