Re: [PATCH] PnP Updates for 2.6.0-test2

[Adam Belay <ambx1@neo.rr.com>]

# --------------------------------------------
# 03/08/05	ambx1@neo.rr.com	1.1111
# [PNPBIOS] Move low level code into a separate file
# 
# This patch moves the low level bios calls to a separate file, 
# "bioscalls.c".  It is a cleanup that will improve organization of the
# pnpbios driver code.
# --------------------------------------------
#
diff -Nru a/drivers/pnp/pnpbios/Makefile b/drivers/pnp/pnpbios/Makefile
--- a/drivers/pnp/pnpbios/Makefile	Tue Aug  5 21:24:45 2003
+++ b/drivers/pnp/pnpbios/Makefile	Tue Aug  5 21:24:45 2003
@@ -4,4 +4,4 @@
 
 pnpbios-proc-$(CONFIG_PROC_FS) = proc.o
 
-obj-y := core.o rsparser.o $(pnpbios-proc-y)
+obj-y := core.o bioscalls.o rsparser.o $(pnpbios-proc-y)
diff -Nru a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/drivers/pnp/pnpbios/bioscalls.c	Tue Aug  5 21:24:45 2003
@@ -0,0 +1,627 @@
+/*
+ * bioscalls.c - the lowlevel layer of the PnPBIOS driver
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/pnpbios.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <asm/page.h>
+#include <asm/system.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <asm/desc.h>
+#include <linux/slab.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <asm/system.h>
+#include <asm/byteorder.h>
+
+
+/* PnP BIOS signature: "$PnP" */
+#define PNP_SIGNATURE   (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24))
+
+#pragma pack(1)
+union pnp_bios_expansion_header {
+	struct {
+		u32 signature;    /* "$PnP" */
+		u8 version;	  /* in BCD */
+		u8 length;	  /* length in bytes, currently 21h */
+		u16 control;	  /* system capabilities */
+		u8 checksum;	  /* all bytes must add up to 0 */
+
+		u32 eventflag;    /* phys. address of the event flag */
+		u16 rmoffset;     /* real mode entry point */
+		u16 rmcseg;
+		u16 pm16offset;   /* 16 bit protected mode entry */
+		u32 pm16cseg;
+		u32 deviceID;	  /* EISA encoded system ID or 0 */
+		u16 rmdseg;	  /* real mode data segment */
+		u32 pm16dseg;	  /* 16 bit pm data segment base */
+	} fields;
+	char chars[0x21];	  /* To calculate the checksum */
+};
+#pragma pack()
+
+static union pnp_bios_expansion_header * pnp_bios_hdr = NULL;
+
+/*
+ * Call this only after init time
+ */
+static int pnp_bios_present(void)
+{
+	return (pnp_bios_hdr != NULL);
+}
+
+static struct {
+	u16	offset;
+	u16	segment;
+} pnp_bios_callpoint;
+
+
+/* The PnP BIOS entries in the GDT */
+#define PNP_GDT    (GDT_ENTRY_PNPBIOS_BASE * 8)
+
+#define PNP_CS32   (PNP_GDT+0x00)	/* segment for calling fn */
+#define PNP_CS16   (PNP_GDT+0x08)	/* code segment for BIOS */
+#define PNP_DS     (PNP_GDT+0x10)	/* data segment for BIOS */
+#define PNP_TS1    (PNP_GDT+0x18)	/* transfer data segment */
+#define PNP_TS2    (PNP_GDT+0x20)	/* another data segment */
+
+/*
+ * These are some opcodes for a "static asmlinkage"
+ * As this code is *not* executed inside the linux kernel segment, but in a
+ * alias at offset 0, we need a far return that can not be compiled by
+ * default (please, prove me wrong! this is *really* ugly!)
+ * This is the only way to get the bios to return into the kernel code,
+ * because the bios code runs in 16 bit protected mode and therefore can only
+ * return to the caller if the call is within the first 64kB, and the linux
+ * kernel begins at offset 3GB...
+ */
+
+asmlinkage void pnp_bios_callfunc(void);
+
+__asm__(
+	".text			\n"
+	__ALIGN_STR "\n"
+	"pnp_bios_callfunc:\n"
+	"	pushl %edx	\n"
+	"	pushl %ecx	\n"
+	"	pushl %ebx	\n"
+	"	pushl %eax	\n"
+	"	lcallw *pnp_bios_callpoint\n"
+	"	addl $16, %esp	\n"
+	"	lret		\n"
+	".previous		\n"
+);
+
+#define Q_SET_SEL(cpu, selname, address, size) \
+do { \
+set_base(cpu_gdt_table[cpu][(selname) >> 3], __va((u32)(address))); \
+set_limit(cpu_gdt_table[cpu][(selname) >> 3], size); \
+} while(0)
+
+#define Q2_SET_SEL(cpu, selname, address, size) \
+do { \
+set_base(cpu_gdt_table[cpu][(selname) >> 3], (u32)(address)); \
+set_limit(cpu_gdt_table[cpu][(selname) >> 3], size); \
+} while(0)
+
+static struct desc_struct bad_bios_desc = { 0, 0x00409200 };
+
+/*
+ * At some point we want to use this stack frame pointer to unwind
+ * after PnP BIOS oopses.
+ */
+
+u32 pnp_bios_fault_esp;
+u32 pnp_bios_fault_eip;
+u32 pnp_bios_is_utter_crap = 0;
+
+static spinlock_t pnp_bios_lock;
+
+
+/*
+ * Support Functions
+ */
+
+static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
+				u16 arg4, u16 arg5, u16 arg6, u16 arg7,
+				void *ts1_base, u32 ts1_size,
+				void *ts2_base, u32 ts2_size)
+{
+	unsigned long flags;
+	u16 status;
+	struct desc_struct save_desc_40;
+	int cpu;
+
+	/*
+	 * PnP BIOSes are generally not terribly re-entrant.
+	 * Also, don't rely on them to save everything correctly.
+	 */
+	if(pnp_bios_is_utter_crap)
+		return PNP_FUNCTION_NOT_SUPPORTED;
+
+	cpu = get_cpu();
+	save_desc_40 = cpu_gdt_table[cpu][0x40 / 8];
+	cpu_gdt_table[cpu][0x40 / 8] = bad_bios_desc;
+
+	/* On some boxes IRQ's during PnP BIOS calls are deadly.  */
+	spin_lock_irqsave(&pnp_bios_lock, flags);
+
+	/* The lock prevents us bouncing CPU here */
+	if (ts1_size)
+		Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
+	if (ts2_size)
+		Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
+
+	__asm__ __volatile__(
+	        "pushl %%ebp\n\t"
+		"pushl %%edi\n\t"
+		"pushl %%esi\n\t"
+		"pushl %%ds\n\t"
+		"pushl %%es\n\t"
+		"pushl %%fs\n\t"
+		"pushl %%gs\n\t"
+		"pushfl\n\t"
+		"movl %%esp, pnp_bios_fault_esp\n\t"
+		"movl $1f, pnp_bios_fault_eip\n\t"
+		"lcall %5,%6\n\t"
+		"1:popfl\n\t"
+		"popl %%gs\n\t"
+		"popl %%fs\n\t"
+		"popl %%es\n\t"
+		"popl %%ds\n\t"
+	        "popl %%esi\n\t"
+		"popl %%edi\n\t"
+		"popl %%ebp\n\t"
+		: "=a" (status)
+		: "0" ((func) | (((u32)arg1) << 16)),
+		  "b" ((arg2) | (((u32)arg3) << 16)),
+		  "c" ((arg4) | (((u32)arg5) << 16)),
+		  "d" ((arg6) | (((u32)arg7) << 16)),
+		  "i" (PNP_CS32),
+		  "i" (0)
+		: "memory"
+	);
+	spin_unlock_irqrestore(&pnp_bios_lock, flags);
+
+	cpu_gdt_table[cpu][0x40 / 8] = save_desc_40;
+	put_cpu();
+
+	/* If we get here and this is set then the PnP BIOS faulted on us. */
+	if(pnp_bios_is_utter_crap)
+	{
+		printk(KERN_ERR "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
+		printk(KERN_ERR "PnPBIOS: You may need to reboot with the \"nobiospnp\" option to operate stably\n");
+		printk(KERN_ERR "PnPBIOS: Check with your vendor for an updated BIOS\n");
+	}
+
+	return status;
+}
+
+void pnpbios_print_status(const char * module, u16 status)
+{
+	switch(status) {
+	case PNP_SUCCESS:
+		printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
+		break;
+	case PNP_NOT_SET_STATICALLY:
+		printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", module);
+		break;
+	case PNP_UNKNOWN_FUNCTION:
+		printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", module);
+		break;
+	case PNP_FUNCTION_NOT_SUPPORTED:
+		printk(KERN_ERR "PnPBIOS: %s: function not supported on this system\n", module);
+		break;
+	case PNP_INVALID_HANDLE:
+		printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
+		break;
+	case PNP_BAD_PARAMETER:
+		printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", module);
+		break;
+	case PNP_SET_FAILED:
+		printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", module);
+		break;
+	case PNP_EVENTS_NOT_PENDING:
+		printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
+		break;
+	case PNP_SYSTEM_NOT_DOCKED:
+		printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", module);
+		break;
+	case PNP_NO_ISA_PNP_CARDS:
+		printk(KERN_ERR "PnPBIOS: %s: no isapnp cards are installed on this system\n", module);
+		break;
+	case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
+		printk(KERN_ERR "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", module);
+		break;
+	case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
+		printk(KERN_ERR "PnPBIOS: %s: unable to undock, the system does not have a battery\n", module);
+		break;
+	case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
+		printk(KERN_ERR "PnPBIOS: %s: could not dock due to resource conflicts\n", module);
+		break;
+	case PNP_BUFFER_TOO_SMALL:
+		printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", module);
+		break;
+	case PNP_USE_ESCD_SUPPORT:
+		printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
+		break;
+	case PNP_MESSAGE_NOT_SUPPORTED:
+		printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", module);
+		break;
+	case PNP_HARDWARE_ERROR:
+		printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", module);
+		break;
+	default:
+		printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, status);
+		break;
+	}
+}
+
+
+/*
+ * PnP BIOS Low Level Calls
+ */
+
+#define PNP_GET_NUM_SYS_DEV_NODES		0x00
+#define PNP_GET_SYS_DEV_NODE			0x01
+#define PNP_SET_SYS_DEV_NODE			0x02
+#define PNP_GET_EVENT				0x03
+#define PNP_SEND_MESSAGE			0x04
+#define PNP_GET_DOCKING_STATION_INFORMATION	0x05
+#define PNP_SET_STATIC_ALLOCED_RES_INFO		0x09
+#define PNP_GET_STATIC_ALLOCED_RES_INFO		0x0a
+#define PNP_GET_APM_ID_TABLE			0x0b
+#define PNP_GET_PNP_ISA_CONFIG_STRUC		0x40
+#define PNP_GET_ESCD_INFO			0x41
+#define PNP_READ_ESCD				0x42
+#define PNP_WRITE_ESCD				0x43
+
+/*
+ * Call PnP BIOS with function 0x00, "get number of system device nodes"
+ */
+static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, PNP_TS1, PNP_DS, 0, 0,
+			       data, sizeof(struct pnp_dev_node_info), 0, 0);
+	data->no_nodes &= 0xff;
+	return status;
+}
+
+int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+	int status = __pnp_bios_dev_node_info( data );
+	if ( status )
+		pnpbios_print_status( "dev_node_info", status );
+	return status;
+}
+
+/*
+ * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible
+ * death if they are asked to access the "current" configuration.
+ * Therefore, if it's a matter of indifference, it's better to call
+ * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0.
+ */
+
+/* 
+ * Call PnP BIOS with function 0x01, "get system device node"
+ * Input: *nodenum = desired node,
+ *        boot = whether to get nonvolatile boot (!=0)
+ *               or volatile current (0) config
+ * Output: *nodenum=next node or 0xff if no more nodes
+ */
+static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	if ( !boot && pnpbios_dont_use_current_config )
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0,
+			       nodenum, sizeof(char), data, 65536);
+	return status;
+}
+
+int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+{
+	int status;
+	status =  __pnp_bios_get_dev_node( nodenum, boot, data );
+	if ( status )
+		pnpbios_print_status( "get_dev_node", status );
+	return status;
+}
+
+
+/*
+ * Call PnP BIOS with function 0x02, "set system device node"
+ * Input: *nodenum = desired node, 
+ *        boot = whether to set nonvolatile boot (!=0)
+ *               or volatile current (0) config
+ */
+static int __pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	if ( !boot && pnpbios_dont_use_current_config )
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, boot ? 2 : 1, PNP_DS, 0, 0,
+			       data, 65536, 0, 0);
+	return status;
+}
+
+int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+{
+	int status;
+	status =  __pnp_bios_set_dev_node( nodenum, boot, data );
+	if ( status ) {
+		pnpbios_print_status( "set_dev_node", status );
+		return status;
+	}
+	if ( !boot ) { /* Update devlist */
+		status =  pnp_bios_get_dev_node( &nodenum, boot, data );
+		if ( status )
+			return status;
+	}
+	return status;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x03, "get event"
+ */
+static int pnp_bios_get_event(u16 *event)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0,
+			       event, sizeof(u16), 0, 0);
+	return status;
+}
+#endif
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x04, "send message"
+ */
+static int pnp_bios_send_message(u16 message)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+	return status;
+}
+#endif
+
+/*
+ * Call PnP BIOS with function 0x05, "get docking station information"
+ */
+int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
+			       data, sizeof(struct pnp_docking_station_info), 0, 0);
+	return status;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x09, "set statically allocated resource
+ * information"
+ */
+static int pnp_bios_set_stat_res(char *info)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
+			       info, *((u16 *) info), 0, 0);
+	return status;
+}
+#endif
+
+/*
+ * Call PnP BIOS with function 0x0a, "get statically allocated resource
+ * information"
+ */
+static int __pnp_bios_get_stat_res(char *info)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
+			       info, 65536, 0, 0);
+	return status;
+}
+
+int pnp_bios_get_stat_res(char *info)
+{
+	int status;
+	status = __pnp_bios_get_stat_res( info );
+	if ( status )
+		pnpbios_print_status( "get_stat_res", status );
+	return status;
+}
+
+#if needed
+/*
+ * Call PnP BIOS with function 0x0b, "get APM id table"
+ */
+static int pnp_bios_apm_id_table(char *table, u16 *size)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0,
+			       table, *size, size, sizeof(u16));
+	return status;
+}
+#endif
+
+/*
+ * Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
+ */
+static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return PNP_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
+			       data, sizeof(struct pnp_isa_config_struc), 0, 0);
+	return status;
+}
+
+int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+	int status;
+	status = __pnp_bios_isapnp_config( data );
+	if ( status )
+		pnpbios_print_status( "isapnp_config", status );
+	return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x41, "get ESCD info"
+ */
+static int __pnp_bios_escd_info(struct escd_info_struc *data)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, PNP_TS1, PNP_DS,
+			       data, sizeof(struct escd_info_struc), 0, 0);
+	return status;
+}
+
+int pnp_bios_escd_info(struct escd_info_struc *data)
+{
+	int status;
+	status = __pnp_bios_escd_info( data );
+	if ( status )
+		pnpbios_print_status( "escd_info", status );
+	return status;
+}
+
+/*
+ * Call PnP BIOS function 0x42, "read ESCD"
+ * nvram_base is determined by calling escd_info
+ */
+static int __pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
+			       data, 65536, (void *)nvram_base, 65536);
+	return status;
+}
+
+int pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+	int status;
+	status = __pnp_bios_read_escd( data, nvram_base );
+	if ( status )
+		pnpbios_print_status( "read_escd", status );
+	return status;
+}
+
+#if needed
+/*
+ * Call PnP BIOS function 0x43, "write ESCD"
+ */
+static int pnp_bios_write_escd(char *data, u32 nvram_base)
+{
+	u16 status;
+	if (!pnp_bios_present())
+		return ESCD_FUNCTION_NOT_SUPPORTED;
+	status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
+			       data, 65536, nvram_base, 65536);
+	return status;
+}
+#endif
+
+
+/*
+ * Probing and Initialization
+ */
+
+static void pnpbios_prepare_bios_calls(union pnp_bios_expansion_header *header)
+{
+	int i;
+	spin_lock_init(&pnp_bios_lock);
+	pnp_bios_callpoint.offset = header->fields.pm16offset;
+	pnp_bios_callpoint.segment = PNP_CS16;
+
+	set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
+	_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
+	for(i=0; i < NR_CPUS; i++)
+	{
+		Q2_SET_SEL(i, PNP_CS32, &pnp_bios_callfunc, 64 * 1024);
+		Q_SET_SEL(i, PNP_CS16, header->fields.pm16cseg, 64 * 1024);
+		Q_SET_SEL(i, PNP_DS, header->fields.pm16dseg, 64 * 1024);
+	}
+}
+
+int pnpbios_probe_installation(void)
+{
+	union pnp_bios_expansion_header *check;
+	u8 sum;
+	int length, i;
+
+	printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n");
+
+	/*
+ 	 * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
+	 * structure and, if one is found, sets up the selectors and
+	 * entry points
+	 */
+	for (check = (union pnp_bios_expansion_header *) __va(0xf0000);
+	     check < (union pnp_bios_expansion_header *) __va(0xffff0);
+	     ((void *) (check)) += 16) {
+		if (check->fields.signature != PNP_SIGNATURE)
+			continue;
+		printk(KERN_INFO "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", check);
+		length = check->fields.length;
+		if (!length) {
+			printk(KERN_ERR "PnPBIOS: installation structure is invalid, skipping\n");
+			continue;
+		}
+		for (sum = 0, i = 0; i < length; i++)
+			sum += check->chars[i];
+		if (sum) {
+			printk(KERN_ERR "PnPBIOS: installation structure is corrupted, skipping\n");
+			continue;
+		}
+		if (check->fields.version < 0x10) {
+			printk(KERN_WARNING "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
+			       check->fields.version >> 4,
+			       check->fields.version & 15);
+			continue;
+		}
+		printk(KERN_INFO "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
+                       check->fields.version >> 4, check->fields.version & 15,
+		       check->fields.pm16cseg, check->fields.pm16offset,
+		       check->fields.pm16dseg);
+		pnp_bios_hdr = check;
+		pnpbios_prepare_bios_calls(check);
+		return 1;
+	}
+
+	printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n");
+	return 0;
+}
diff -Nru a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
--- a/drivers/pnp/pnpbios/core.c	Tue Aug  5 21:24:45 2003
+++ b/drivers/pnp/pnpbios/core.c	Tue Aug  5 21:24:45 2003
@@ -74,242 +74,8 @@
  *
  */
 
-/* PnP BIOS signature: "$PnP" */
-#define PNP_SIGNATURE   (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24))
-
-#pragma pack(1)
-union pnp_bios_expansion_header {
-	struct {
-		u32 signature;    /* "$PnP" */
-		u8 version;	  /* in BCD */
-		u8 length;	  /* length in bytes, currently 21h */
-		u16 control;	  /* system capabilities */
-		u8 checksum;	  /* all bytes must add up to 0 */
-
-		u32 eventflag;    /* phys. address of the event flag */
-		u16 rmoffset;     /* real mode entry point */
-		u16 rmcseg;
-		u16 pm16offset;   /* 16 bit protected mode entry */
-		u32 pm16cseg;
-		u32 deviceID;	  /* EISA encoded system ID or 0 */
-		u16 rmdseg;	  /* real mode data segment */
-		u32 pm16dseg;	  /* 16 bit pm data segment base */
-	} fields;
-	char chars[0x21];	  /* To calculate the checksum */
-};
-#pragma pack()
-
-static struct {
-	u16	offset;
-	u16	segment;
-} pnp_bios_callpoint;
-
-static union pnp_bios_expansion_header * pnp_bios_hdr = NULL;
 struct pnp_dev_node_info node_info;
 
-/* The PnP BIOS entries in the GDT */
-#define PNP_GDT    (GDT_ENTRY_PNPBIOS_BASE * 8)
-
-#define PNP_CS32   (PNP_GDT+0x00)	/* segment for calling fn */
-#define PNP_CS16   (PNP_GDT+0x08)	/* code segment for BIOS */
-#define PNP_DS     (PNP_GDT+0x10)	/* data segment for BIOS */
-#define PNP_TS1    (PNP_GDT+0x18)	/* transfer data segment */
-#define PNP_TS2    (PNP_GDT+0x20)	/* another data segment */
-
-/* 
- * These are some opcodes for a "static asmlinkage"
- * As this code is *not* executed inside the linux kernel segment, but in a
- * alias at offset 0, we need a far return that can not be compiled by
- * default (please, prove me wrong! this is *really* ugly!) 
- * This is the only way to get the bios to return into the kernel code,
- * because the bios code runs in 16 bit protected mode and therefore can only
- * return to the caller if the call is within the first 64kB, and the linux
- * kernel begins at offset 3GB...
- */
-
-asmlinkage void pnp_bios_callfunc(void);
-
-__asm__(
-	".text			\n"
-	__ALIGN_STR "\n"
-	"pnp_bios_callfunc:\n"
-	"	pushl %edx	\n"
-	"	pushl %ecx	\n"
-	"	pushl %ebx	\n"
-	"	pushl %eax	\n"
-	"	lcallw *pnp_bios_callpoint\n"
-	"	addl $16, %esp	\n"
-	"	lret		\n"
-	".previous		\n"
-);
-
-#define Q_SET_SEL(cpu, selname, address, size) \
-do { \
-set_base(cpu_gdt_table[cpu][(selname) >> 3], __va((u32)(address))); \
-set_limit(cpu_gdt_table[cpu][(selname) >> 3], size); \
-} while(0)
-
-#define Q2_SET_SEL(cpu, selname, address, size) \
-do { \
-set_base(cpu_gdt_table[cpu][(selname) >> 3], (u32)(address)); \
-set_limit(cpu_gdt_table[cpu][(selname) >> 3], size); \
-} while(0)
-
-static struct desc_struct bad_bios_desc = { 0, 0x00409200 };
-
-/*
- * At some point we want to use this stack frame pointer to unwind
- * after PnP BIOS oopses.
- */
-
-u32 pnp_bios_fault_esp;
-u32 pnp_bios_fault_eip;
-u32 pnp_bios_is_utter_crap = 0;
-
-static spinlock_t pnp_bios_lock;
-
-static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
-				u16 arg4, u16 arg5, u16 arg6, u16 arg7,
-				void *ts1_base, u32 ts1_size,
-				void *ts2_base, u32 ts2_size)
-{
-	unsigned long flags;
-	u16 status;
-	struct desc_struct save_desc_40;
-	int cpu;
-
-	/*
-	 * PnP BIOSes are generally not terribly re-entrant.
-	 * Also, don't rely on them to save everything correctly.
-	 */
-	if(pnp_bios_is_utter_crap)
-		return PNP_FUNCTION_NOT_SUPPORTED;
-
-	cpu = get_cpu();
-	save_desc_40 = cpu_gdt_table[cpu][0x40 / 8];
-	cpu_gdt_table[cpu][0x40 / 8] = bad_bios_desc;
-
-	/* On some boxes IRQ's during PnP BIOS calls are deadly.  */
-	spin_lock_irqsave(&pnp_bios_lock, flags);
-
-	/* The lock prevents us bouncing CPU here */
-	if (ts1_size)
-		Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
-	if (ts2_size)
-		Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
-
-	__asm__ __volatile__(
-	        "pushl %%ebp\n\t"
-		"pushl %%edi\n\t"
-		"pushl %%esi\n\t"
-		"pushl %%ds\n\t"
-		"pushl %%es\n\t"
-		"pushl %%fs\n\t"
-		"pushl %%gs\n\t"
-		"pushfl\n\t"
-		"movl %%esp, pnp_bios_fault_esp\n\t"
-		"movl $1f, pnp_bios_fault_eip\n\t"
-		"lcall %5,%6\n\t"
-		"1:popfl\n\t"
-		"popl %%gs\n\t"
-		"popl %%fs\n\t"
-		"popl %%es\n\t"
-		"popl %%ds\n\t"
-	        "popl %%esi\n\t"
-		"popl %%edi\n\t"
-		"popl %%ebp\n\t"
-		: "=a" (status)
-		: "0" ((func) | (((u32)arg1) << 16)),
-		  "b" ((arg2) | (((u32)arg3) << 16)),
-		  "c" ((arg4) | (((u32)arg5) << 16)),
-		  "d" ((arg6) | (((u32)arg7) << 16)),
-		  "i" (PNP_CS32),
-		  "i" (0)
-		: "memory"
-	);
-	spin_unlock_irqrestore(&pnp_bios_lock, flags);
-
-	cpu_gdt_table[cpu][0x40 / 8] = save_desc_40;
-	put_cpu();
-	
-	/* If we get here and this is set then the PnP BIOS faulted on us. */
-	if(pnp_bios_is_utter_crap)
-	{
-		printk(KERN_ERR "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
-		printk(KERN_ERR "PnPBIOS: You may need to reboot with the \"nobiospnp\" option to operate stably\n");
-		printk(KERN_ERR "PnPBIOS: Check with your vendor for an updated BIOS\n");
-	}
-
-	return status;
-}
-
-
-/*
- *
- * UTILITY FUNCTIONS
- *
- */
-
-static void pnpbios_print_status(const char * module, u16 status)
-{
-	switch(status) {
-	case PNP_SUCCESS:
-		printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
-		break;
-	case PNP_NOT_SET_STATICALLY:
-		printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", module);
-		break;
-	case PNP_UNKNOWN_FUNCTION:
-		printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", module);
-		break;
-	case PNP_FUNCTION_NOT_SUPPORTED:
-		printk(KERN_ERR "PnPBIOS: %s: function not supported on this system\n", module);
-		break;
-	case PNP_INVALID_HANDLE:
-		printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
-		break;
-	case PNP_BAD_PARAMETER:
-		printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", module);
-		break;
-	case PNP_SET_FAILED:
-		printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", module);
-		break;
-	case PNP_EVENTS_NOT_PENDING:
-		printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
-		break;
-	case PNP_SYSTEM_NOT_DOCKED:
-		printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", module);
-		break;
-	case PNP_NO_ISA_PNP_CARDS:
-		printk(KERN_ERR "PnPBIOS: %s: no isapnp cards are installed on this system\n", module);
-		break;
-	case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
-		printk(KERN_ERR "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", module);
-		break;
-	case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
-		printk(KERN_ERR "PnPBIOS: %s: unable to undock, the system does not have a battery\n", module);
-		break;
-	case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
-		printk(KERN_ERR "PnPBIOS: %s: could not dock due to resource conflicts\n", module);
-		break;
-	case PNP_BUFFER_TOO_SMALL:
-		printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", module);
-		break;
-	case PNP_USE_ESCD_SUPPORT:
-		printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
-		break;
-	case PNP_MESSAGE_NOT_SUPPORTED:
-		printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", module);
-		break;
-	case PNP_HARDWARE_ERROR:
-		printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", module);
-		break;
-	default:
-		printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, status);
-		break;
-	}
-}
-
 void *pnpbios_kmalloc(size_t size, int f)
 {
 	void *p = kmalloc( size, f );
@@ -321,308 +87,6 @@
 }
 
 /*
- * Call this only after init time
- */
-static int pnp_bios_present(void)
-{
-	return (pnp_bios_hdr != NULL);
-}
-
-
-/*
- *
- * PnP BIOS ACCESS FUNCTIONS
- *
- */
-
-#define PNP_GET_NUM_SYS_DEV_NODES       0x00
-#define PNP_GET_SYS_DEV_NODE            0x01
-#define PNP_SET_SYS_DEV_NODE            0x02
-#define PNP_GET_EVENT                   0x03
-#define PNP_SEND_MESSAGE                0x04
-#define PNP_GET_DOCKING_STATION_INFORMATION 0x05
-#define PNP_SET_STATIC_ALLOCED_RES_INFO 0x09
-#define PNP_GET_STATIC_ALLOCED_RES_INFO 0x0a
-#define PNP_GET_APM_ID_TABLE            0x0b
-#define PNP_GET_PNP_ISA_CONFIG_STRUC    0x40
-#define PNP_GET_ESCD_INFO               0x41
-#define PNP_READ_ESCD                   0x42
-#define PNP_WRITE_ESCD                  0x43
-
-/*
- * Call PnP BIOS with function 0x00, "get number of system device nodes"
- */
-static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, PNP_TS1, PNP_DS, 0, 0,
-			       data, sizeof(struct pnp_dev_node_info), 0, 0);
-	data->no_nodes &= 0xff;
-	return status;
-}
-
-int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
-{
-	int status = __pnp_bios_dev_node_info( data );
-	if ( status )
-		pnpbios_print_status( "dev_node_info", status );
-	return status;
-}
-
-/*
- * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible
- * death if they are asked to access the "current" configuration.
- * Therefore, if it's a matter of indifference, it's better to call
- * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0.
- */
-
-/* 
- * Call PnP BIOS with function 0x01, "get system device node"
- * Input: *nodenum = desired node, 
- *        boot = whether to get nonvolatile boot (!=0)
- *               or volatile current (0) config
- * Output: *nodenum=next node or 0xff if no more nodes
- */
-static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	if ( !boot && pnpbios_dont_use_current_config )
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0,
-			       nodenum, sizeof(char), data, 65536);
-	return status;
-}
-
-int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
-{
-	int status;
-	status =  __pnp_bios_get_dev_node( nodenum, boot, data );
-	if ( status )
-		pnpbios_print_status( "get_dev_node", status );
-	return status;
-}
-
-
-/*
- * Call PnP BIOS with function 0x02, "set system device node"
- * Input: *nodenum = desired node, 
- *        boot = whether to set nonvolatile boot (!=0)
- *               or volatile current (0) config
- */
-static int __pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	if ( !boot && pnpbios_dont_use_current_config )
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, boot ? 2 : 1, PNP_DS, 0, 0,
-			       data, 65536, 0, 0);
-	return status;
-}
-
-int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
-{
-	int status;
-	status =  __pnp_bios_set_dev_node( nodenum, boot, data );
-	if ( status ) {
-		pnpbios_print_status( "set_dev_node", status );
-		return status;
-	}
-	if ( !boot ) { /* Update devlist */
-		status =  pnp_bios_get_dev_node( &nodenum, boot, data );
-		if ( status )
-			return status;
-	}
-	return status;
-}
-
-#if needed
-/*
- * Call PnP BIOS with function 0x03, "get event"
- */
-static int pnp_bios_get_event(u16 *event)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0,
-			       event, sizeof(u16), 0, 0);
-	return status;
-}
-#endif
-
-#if needed
-/* 
- * Call PnP BIOS with function 0x04, "send message"
- */
-static int pnp_bios_send_message(u16 message)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-	return status;
-}
-#endif
-
-#ifdef CONFIG_HOTPLUG
-/*
- * Call PnP BIOS with function 0x05, "get docking station information"
- */
-static int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
-			       data, sizeof(struct pnp_docking_station_info), 0, 0);
-	return status;
-}
-#endif
-
-#if needed
-/*
- * Call PnP BIOS with function 0x09, "set statically allocated resource
- * information"
- */
-static int pnp_bios_set_stat_res(char *info)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
-			       info, *((u16 *) info), 0, 0);
-	return status;
-}
-#endif
-
-/*
- * Call PnP BIOS with function 0x0a, "get statically allocated resource
- * information"
- */
-static int __pnp_bios_get_stat_res(char *info)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
-			       info, 65536, 0, 0);
-	return status;
-}
-
-int pnp_bios_get_stat_res(char *info)
-{
-	int status;
-	status = __pnp_bios_get_stat_res( info );
-	if ( status )
-		pnpbios_print_status( "get_stat_res", status );
-	return status;
-}
-
-#if needed
-/*
- * Call PnP BIOS with function 0x0b, "get APM id table"
- */
-static int pnp_bios_apm_id_table(char *table, u16 *size)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0,
-			       table, *size, size, sizeof(u16));
-	return status;
-}
-#endif
-
-/*
- * Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
- */
-static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return PNP_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
-			       data, sizeof(struct pnp_isa_config_struc), 0, 0);
-	return status;
-}
-
-int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
-{
-	int status;
-	status = __pnp_bios_isapnp_config( data );
-	if ( status )
-		pnpbios_print_status( "isapnp_config", status );
-	return status;
-}
-
-/*
- * Call PnP BIOS with function 0x41, "get ESCD info"
- */
-static int __pnp_bios_escd_info(struct escd_info_struc *data)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return ESCD_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, PNP_TS1, PNP_DS,
-			       data, sizeof(struct escd_info_struc), 0, 0);
-	return status;
-}
-
-int pnp_bios_escd_info(struct escd_info_struc *data)
-{
-	int status;
-	status = __pnp_bios_escd_info( data );
-	if ( status )
-		pnpbios_print_status( "escd_info", status );
-	return status;
-}
-
-/*
- * Call PnP BIOS function 0x42, "read ESCD"
- * nvram_base is determined by calling escd_info
- */
-static int __pnp_bios_read_escd(char *data, u32 nvram_base)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return ESCD_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
-			       data, 65536, (void *)nvram_base, 65536);
-	return status;
-}
-
-int pnp_bios_read_escd(char *data, u32 nvram_base)
-{
-	int status;
-	status = __pnp_bios_read_escd( data, nvram_base );
-	if ( status )
-		pnpbios_print_status( "read_escd", status );
-	return status;
-}
-
-#if needed
-/*
- * Call PnP BIOS function 0x43, "write ESCD"
- */
-static int pnp_bios_write_escd(char *data, u32 nvram_base)
-{
-	u16 status;
-	if (!pnp_bios_present())
-		return ESCD_FUNCTION_NOT_SUPPORTED;
-	status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
-			       data, 65536, nvram_base, 65536);
-	return status;
-}
-#endif
-
-
-/*
  *
  * DOCKING FUNCTIONS
  *
@@ -874,15 +338,8 @@
 	unsigned int nodes_got = 0;
 	unsigned int devs = 0;
 	struct pnp_bios_node *node;
-	struct pnp_dev_node_info node_info;
 	struct pnp_dev *dev;
 
-	if (!pnp_bios_present())
-		return;
-
-	if (pnp_bios_dev_node_info(&node_info) != 0)
-		return;
-
 	node = pnpbios_kmalloc(node_info.max_node_size, GFP_KERNEL);
 	if (!node)
 		return;
@@ -957,68 +414,15 @@
 
 int __init pnpbios_init(void)
 {
-	union pnp_bios_expansion_header *check;
-	u8 sum;
-	int i, length, r;
-
-	spin_lock_init(&pnp_bios_lock);
-
+	int ret;
 	if(pnpbios_disabled || (dmi_broken & BROKEN_PNP_BIOS)) {
 		printk(KERN_INFO "PnPBIOS: Disabled\n");
 		return -ENODEV;
-	} else
-		printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n");
-
-	/*
- 	 * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
-	 * structure and, if one is found, sets up the selectors and
-	 * entry points
-	 */
-	for (check = (union pnp_bios_expansion_header *) __va(0xf0000);
-	     check < (union pnp_bios_expansion_header *) __va(0xffff0);
-	     ((void *) (check)) += 16) {
-		if (check->fields.signature != PNP_SIGNATURE)
-			continue;
-		length = check->fields.length;
-		if (!length)
-			continue;
-		for (sum = 0, i = 0; i < length; i++)
-			sum += check->chars[i];
-		if (sum)
-			continue;
-		if (check->fields.version < 0x10) {
-			printk(KERN_WARNING "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
-			       check->fields.version >> 4,
-			       check->fields.version & 15);
-			continue;
-		}
-		printk(KERN_INFO "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", check);
-		printk(KERN_INFO "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
-                       check->fields.version >> 4, check->fields.version & 15,
-		       check->fields.pm16cseg, check->fields.pm16offset,
-		       check->fields.pm16dseg);
-		pnp_bios_callpoint.offset = check->fields.pm16offset;
-		pnp_bios_callpoint.segment = PNP_CS16;
-		pnp_bios_hdr = check;
-
-		set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
-		_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
-		for(i=0; i < NR_CPUS; i++)
-		{
-			Q2_SET_SEL(i, PNP_CS32, &pnp_bios_callfunc, 64 * 1024);
-			Q_SET_SEL(i, PNP_CS16, check->fields.pm16cseg, 64 * 1024);
-			Q_SET_SEL(i, PNP_DS, check->fields.pm16dseg, 64 * 1024);
-		}
-		break;
-	}
-	if (!pnp_bios_present()) {
-		printk(KERN_INFO "PnPBIOS: A PnP BIOS was not detected.\n");
-		return -ENODEV;
 	}
 
-	/*
-	 * we found a pnpbios, now let's load the rest of the driver
-	 */
+	/* scan the system for pnpbios support */
+	if (!pnpbios_probe_installation())
+		return -ENODEV;
 
 	/* read the node info */
 	if (pnp_bios_dev_node_info(&node_info)) {
@@ -1031,9 +435,9 @@
 
 #ifdef CONFIG_PROC_FS
 	/* start the proc interface */
-	r = pnpbios_proc_init();
-	if (r)
-		return r;
+	ret = pnpbios_proc_init();
+	if (ret)
+		return ret;
 #endif
 
 	/* scan for pnpbios devices */
diff -Nru a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h
--- a/drivers/pnp/pnpbios/pnpbios.h	Tue Aug  5 21:24:45 2003
+++ b/drivers/pnp/pnpbios/pnpbios.h	Tue Aug  5 21:24:45 2003
@@ -6,3 +6,6 @@
 extern int pnpbios_read_resources_from_node(struct pnp_resource_table *res, struct pnp_bios_node * node);
 extern int pnpbios_write_resources_to_node(struct pnp_resource_table *res, struct pnp_bios_node * node);
 extern void pnpid32_to_pnpid(u32 id, char *str);
+
+extern void pnpbios_print_status(const char * module, u16 status);
+extern int pnpbios_probe_installation(void);
diff -Nru a/include/linux/pnpbios.h b/include/linux/pnpbios.h
--- a/include/linux/pnpbios.h	Tue Aug  5 21:24:45 2003
+++ b/include/linux/pnpbios.h	Tue Aug  5 21:24:45 2003
@@ -146,6 +146,7 @@
 extern int pnp_bios_isapnp_config (struct pnp_isa_config_struc *data);
 extern int pnp_bios_escd_info (struct escd_info_struc *data);
 extern int pnp_bios_read_escd (char *data, u32 nvram_base);
+extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data);
 #if needed
 extern int pnp_bios_get_event (u16 *message);
 extern int pnp_bios_send_message (u16 message);