1 files changed, 41 insertions, 8 deletions

diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 759070c82751..f0870bef24d1 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -571,17 +571,28 @@ static inline void copy_edd(void)
 #endif
 
 #define EBDA_ADDR_POINTER 0x40E
-static void __init reserve_ebda_region(void)
+
+unsigned __initdata ebda_addr;
+unsigned __initdata ebda_size;
+
+static void discover_ebda(void)
 {
-        unsigned int addr;
-        /** 
+        /*
          * there is a real-mode segmented pointer pointing to the 
          * 4K EBDA area at 0x40E
          */
-        addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
-        addr <<= 4;
-        if (addr)
-                reserve_bootmem_generic(addr, PAGE_SIZE);
+        ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
+        ebda_addr <<= 4;
+
+        ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
+
+        /* Round EBDA up to pages */
+        if (ebda_size == 0)
+                ebda_size = 1;
+        ebda_size <<= 10;
+        ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
+        if (ebda_size > 64*1024)
+                ebda_size = 64*1024;
 }
 
 void __init setup_arch(char **cmdline_p)
@@ -627,6 +638,8 @@ void __init setup_arch(char **cmdline_p)
 
         check_efer();
 
+        discover_ebda();
+
         init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 
         dmi_scan_machine();
@@ -669,7 +682,8 @@ void __init setup_arch(char **cmdline_p)
         reserve_bootmem_generic(0, PAGE_SIZE);
 
         /* reserve ebda region */
-        reserve_ebda_region();
+        if (ebda_addr)
+                reserve_bootmem_generic(ebda_addr, ebda_size);
 
 #ifdef CONFIG_SMP
         /*
@@ -1426,3 +1440,22 @@ struct seq_operations cpuinfo_op = {
         .show = show_cpuinfo,
 };
 
+#ifdef CONFIG_INPUT_PCSPKR
+#include <linux/platform_device.h>
+static __init int add_pcspkr(void)
+{
+        struct platform_device *pd;
+        int ret;
+
+        pd = platform_device_alloc("pcspkr", -1);
+        if (!pd)
+                return -ENOMEM;
+
+        ret = platform_device_add(pd);
+        if (ret)
+                platform_device_put(pd);
+
+        return ret;
+}
+device_initcall(add_pcspkr);
+#endif