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SubjectRe: [PATCH] PnP Updates for 2.6.0-test2
# --------------------------------------------
# 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);
-
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