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Diffstat (limited to 'arch/i386/kernel/bootflag.c')
-rw-r--r--arch/i386/kernel/bootflag.c98
1 files changed, 0 insertions, 98 deletions
diff --git a/arch/i386/kernel/bootflag.c b/arch/i386/kernel/bootflag.c
deleted file mode 100644
index 0b9860530a6..00000000000
--- a/arch/i386/kernel/bootflag.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * Implement 'Simple Boot Flag Specification 2.0'
- */
-
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/acpi.h>
-#include <asm/io.h>
-
-#include <linux/mc146818rtc.h>
-
-
-#define SBF_RESERVED (0x78)
-#define SBF_PNPOS (1<<0)
-#define SBF_BOOTING (1<<1)
-#define SBF_DIAG (1<<2)
-#define SBF_PARITY (1<<7)
-
-
-int sbf_port __initdata = -1; /* set via acpi_boot_init() */
-
-
-static int __init parity(u8 v)
-{
- int x = 0;
- int i;
-
- for(i=0;i<8;i++)
- {
- x^=(v&1);
- v>>=1;
- }
- return x;
-}
-
-static void __init sbf_write(u8 v)
-{
- unsigned long flags;
- if(sbf_port != -1)
- {
- v &= ~SBF_PARITY;
- if(!parity(v))
- v|=SBF_PARITY;
-
- printk(KERN_INFO "Simple Boot Flag at 0x%x set to 0x%x\n", sbf_port, v);
-
- spin_lock_irqsave(&rtc_lock, flags);
- CMOS_WRITE(v, sbf_port);
- spin_unlock_irqrestore(&rtc_lock, flags);
- }
-}
-
-static u8 __init sbf_read(void)
-{
- u8 v;
- unsigned long flags;
- if(sbf_port == -1)
- return 0;
- spin_lock_irqsave(&rtc_lock, flags);
- v = CMOS_READ(sbf_port);
- spin_unlock_irqrestore(&rtc_lock, flags);
- return v;
-}
-
-static int __init sbf_value_valid(u8 v)
-{
- if(v&SBF_RESERVED) /* Reserved bits */
- return 0;
- if(!parity(v))
- return 0;
- return 1;
-}
-
-static int __init sbf_init(void)
-{
- u8 v;
- if(sbf_port == -1)
- return 0;
- v = sbf_read();
- if(!sbf_value_valid(v))
- printk(KERN_WARNING "Simple Boot Flag value 0x%x read from CMOS RAM was invalid\n",v);
-
- v &= ~SBF_RESERVED;
- v &= ~SBF_BOOTING;
- v &= ~SBF_DIAG;
-#if defined(CONFIG_ISAPNP)
- v |= SBF_PNPOS;
-#endif
- sbf_write(v);
- return 0;
-}
-
-module_init(sbf_init);