Initial import

1 files changed, 1496 insertions, 0 deletions

diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
new file mode 100644
index 000000000..22395901d
--- /dev/null
+++ b/arch/parisc/kernel/firmware.c
@@ -0,0 +1,1496 @@
+/*
+ * arch/parisc/kernel/firmware.c  - safe PDC access routines
+ *
+ *	PDC == Processor Dependent Code
+ *
+ * See http://www.parisc-linux.org/documentation/index.html
+ * for documentation describing the entry points and calling
+ * conventions defined below.
+ *
+ * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
+ * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
+ * Copyright 2003 Grant Grundler <grundler parisc-linux org>
+ * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
+ * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ */
+
+/*	I think it would be in everyone's best interest to follow this
+ *	guidelines when writing PDC wrappers:
+ *
+ *	 - the name of the pdc wrapper should match one of the macros
+ *	   used for the first two arguments
+ *	 - don't use caps for random parts of the name
+ *	 - use the static PDC result buffers and "copyout" to structs
+ *	   supplied by the caller to encapsulate alignment restrictions
+ *	 - hold pdc_lock while in PDC or using static result buffers
+ *	 - use __pa() to convert virtual (kernel) pointers to physical
+ *	   ones.
+ *	 - the name of the struct used for pdc return values should equal
+ *	   one of the macros used for the first two arguments to the
+ *	   corresponding PDC call
+ *	 - keep the order of arguments
+ *	 - don't be smart (setting trailing NUL bytes for strings, return
+ *	   something useful even if the call failed) unless you are sure
+ *	   it's not going to affect functionality or performance
+ *
+ *	Example:
+ *	int pdc_cache_info(struct pdc_cache_info *cache_info )
+ *	{
+ *		int retval;
+ *
+ *		spin_lock_irq(&pdc_lock);
+ *		retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
+ *		convert_to_wide(pdc_result);
+ *		memcpy(cache_info, pdc_result, sizeof(*cache_info));
+ *		spin_unlock_irq(&pdc_lock);
+ *
+ *		return retval;
+ *	}
+ *					prumpf	991016	
+ */
+
+#include <stdarg.h>
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+
+#include <asm/page.h>
+#include <asm/pdc.h>
+#include <asm/pdcpat.h>
+#include <asm/processor.h>	/* for boot_cpu_data */
+
+static DEFINE_SPINLOCK(pdc_lock);
+extern unsigned long pdc_result[NUM_PDC_RESULT];
+extern unsigned long pdc_result2[NUM_PDC_RESULT];
+
+#ifdef CONFIG_64BIT
+#define WIDE_FIRMWARE 0x1
+#define NARROW_FIRMWARE 0x2
+
+/* Firmware needs to be initially set to narrow to determine the 
+ * actual firmware width. */
+int parisc_narrow_firmware __read_mostly = 1;
+#endif
+
+/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
+ * and MEM_PDC calls are always the same width as the OS.
+ * Some PAT boxes may have 64-bit IODC I/O.
+ *
+ * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
+ * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
+ * This allowed wide kernels to run on Cxxx boxes.
+ * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
+ * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
+ */
+
+#ifdef CONFIG_64BIT
+long real64_call(unsigned long function, ...);
+#endif
+long real32_call(unsigned long function, ...);
+
+#ifdef CONFIG_64BIT
+#   define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
+#   define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
+#else
+#   define MEM_PDC (unsigned long)PAGE0->mem_pdc
+#   define mem_pdc_call(args...) real32_call(MEM_PDC, args)
+#endif
+
+
+/**
+ * f_extend - Convert PDC addresses to kernel addresses.
+ * @address: Address returned from PDC.
+ *
+ * This function is used to convert PDC addresses into kernel addresses
+ * when the PDC address size and kernel address size are different.
+ */
+static unsigned long f_extend(unsigned long address)
+{
+#ifdef CONFIG_64BIT
+	if(unlikely(parisc_narrow_firmware)) {
+		if((address & 0xff000000) == 0xf0000000)
+			return 0xf0f0f0f000000000UL | (u32)address;
+
+		if((address & 0xf0000000) == 0xf0000000)
+			return 0xffffffff00000000UL | (u32)address;
+	}
+#endif
+	return address;
+}
+
+/**
+ * convert_to_wide - Convert the return buffer addresses into kernel addresses.
+ * @address: The return buffer from PDC.
+ *
+ * This function is used to convert the return buffer addresses retrieved from PDC
+ * into kernel addresses when the PDC address size and kernel address size are
+ * different.
+ */
+static void convert_to_wide(unsigned long *addr)
+{
+#ifdef CONFIG_64BIT
+	int i;
+	unsigned int *p = (unsigned int *)addr;
+
+	if(unlikely(parisc_narrow_firmware)) {
+		for(i = 31; i >= 0; --i)
+			addr[i] = p[i];
+	}
+#endif
+}
+
+#ifdef CONFIG_64BIT
+void set_firmware_width_unlocked(void)
+{
+	int ret;
+
+	ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
+		__pa(pdc_result), 0);
+	convert_to_wide(pdc_result);
+	if (pdc_result[0] != NARROW_FIRMWARE)
+		parisc_narrow_firmware = 0;
+}
+	
+/**
+ * set_firmware_width - Determine if the firmware is wide or narrow.
+ * 
+ * This function must be called before any pdc_* function that uses the
+ * convert_to_wide function.
+ */
+void set_firmware_width(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&pdc_lock, flags);
+	set_firmware_width_unlocked();
+	spin_unlock_irqrestore(&pdc_lock, flags);
+}
+#else
+void set_firmware_width_unlocked(void)
+{
+	return;
+}
+
+void set_firmware_width(void)
+{
+	return;
+}
+#endif /*CONFIG_64BIT*/
+
+/**
+ * pdc_emergency_unlock - Unlock the linux pdc lock
+ *
+ * This call unlocks the linux pdc lock in case we need some PDC functions
+ * (like pdc_add_valid) during kernel stack dump.
+ */
+void pdc_emergency_unlock(void)
+{
+ 	/* Spinlock DEBUG code freaks out if we unconditionally unlock */
+        if (spin_is_locked(&pdc_lock))
+		spin_unlock(&pdc_lock);
+}
+
+
+/**
+ * pdc_add_valid - Verify address can be accessed without causing a HPMC.
+ * @address: Address to be verified.
+ *
+ * This PDC call attempts to read from the specified address and verifies
+ * if the address is valid.
+ * 
+ * The return value is PDC_OK (0) in case accessing this address is valid.
+ */
+int pdc_add_valid(unsigned long address)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+EXPORT_SYMBOL(pdc_add_valid);
+
+/**
+ * pdc_chassis_info - Return chassis information.
+ * @result: The return buffer.
+ * @chassis_info: The memory buffer address.
+ * @len: The size of the memory buffer address.
+ *
+ * An HVERSION dependent call for returning the chassis information.
+ */
+int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
+        memcpy(&pdc_result2, led_info, len);
+        retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
+                              __pa(pdc_result), __pa(pdc_result2), len);
+        memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
+        memcpy(led_info, pdc_result2, len);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
+ * @retval: -1 on error, 0 on success. Other value are PDC errors
+ * 
+ * Must be correctly formatted or expect system crash
+ */
+#ifdef CONFIG_64BIT
+int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
+{
+	int retval = 0;
+	unsigned long flags;
+        
+	if (!is_pdc_pat())
+		return -1;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+#endif
+
+/**
+ * pdc_chassis_disp - Updates chassis code
+ * @retval: -1 on error, 0 on success
+ */
+int pdc_chassis_disp(unsigned long disp)
+{
+	int retval = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_chassis_warn - Fetches chassis warnings
+ * @retval: -1 on error, 0 on success
+ */
+int pdc_chassis_warn(unsigned long *warn)
+{
+	int retval = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
+	*warn = pdc_result[0];
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
+{
+	int ret;
+
+	ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
+	convert_to_wide(pdc_result);
+	pdc_coproc_info->ccr_functional = pdc_result[0];
+	pdc_coproc_info->ccr_present = pdc_result[1];
+	pdc_coproc_info->revision = pdc_result[17];
+	pdc_coproc_info->model = pdc_result[18];
+
+	return ret;
+}
+
+/**
+ * pdc_coproc_cfg - To identify coprocessors attached to the processor.
+ * @pdc_coproc_info: Return buffer address.
+ *
+ * This PDC call returns the presence and status of all the coprocessors
+ * attached to the processor.
+ */
+int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
+{
+	int ret;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return ret;
+}
+
+/**
+ * pdc_iodc_read - Read data from the modules IODC.
+ * @actcnt: The actual number of bytes.
+ * @hpa: The HPA of the module for the iodc read.
+ * @index: The iodc entry point.
+ * @iodc_data: A buffer memory for the iodc options.
+ * @iodc_data_size: Size of the memory buffer.
+ *
+ * This PDC call reads from the IODC of the module specified by the hpa
+ * argument.
+ */
+int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
+		  void *iodc_data, unsigned int iodc_data_size)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, 
+			      index, __pa(pdc_result2), iodc_data_size);
+	convert_to_wide(pdc_result);
+	*actcnt = pdc_result[0];
+	memcpy(iodc_data, pdc_result2, iodc_data_size);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+EXPORT_SYMBOL(pdc_iodc_read);
+
+/**
+ * pdc_system_map_find_mods - Locate unarchitected modules.
+ * @pdc_mod_info: Return buffer address.
+ * @mod_path: pointer to dev path structure.
+ * @mod_index: fixed address module index.
+ *
+ * To locate and identify modules which reside at fixed I/O addresses, which
+ * do not self-identify via architected bus walks.
+ */
+int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
+			     struct pdc_module_path *mod_path, long mod_index)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), 
+			      __pa(pdc_result2), mod_index);
+	convert_to_wide(pdc_result);
+	memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
+	memcpy(mod_path, pdc_result2, sizeof(*mod_path));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
+	return retval;
+}
+
+/**
+ * pdc_system_map_find_addrs - Retrieve additional address ranges.
+ * @pdc_addr_info: Return buffer address.
+ * @mod_index: Fixed address module index.
+ * @addr_index: Address range index.
+ * 
+ * Retrieve additional information about subsequent address ranges for modules
+ * with multiple address ranges.  
+ */
+int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, 
+			      long mod_index, long addr_index)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
+			      mod_index, addr_index);
+	convert_to_wide(pdc_result);
+	memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
+	return retval;
+}
+
+/**
+ * pdc_model_info - Return model information about the processor.
+ * @model: The return buffer.
+ *
+ * Returns the version numbers, identifiers, and capabilities from the processor module.
+ */
+int pdc_model_info(struct pdc_model *model) 
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
+	convert_to_wide(pdc_result);
+	memcpy(model, pdc_result, sizeof(*model));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_model_sysmodel - Get the system model name.
+ * @name: A char array of at least 81 characters.
+ *
+ * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
+ * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
+ * on HP/UX.
+ */
+int pdc_model_sysmodel(char *name)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
+                              OS_ID_HPUX, __pa(name));
+        convert_to_wide(pdc_result);
+
+        if (retval == PDC_OK) {
+                name[pdc_result[0]] = '\0'; /* add trailing '\0' */
+        } else {
+                name[0] = 0;
+        }
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_model_versions - Identify the version number of each processor.
+ * @cpu_id: The return buffer.
+ * @id: The id of the processor to check.
+ *
+ * Returns the version number for each processor component.
+ *
+ * This comment was here before, but I do not know what it means :( -RB
+ * id: 0 = cpu revision, 1 = boot-rom-version
+ */
+int pdc_model_versions(unsigned long *versions, int id)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
+        convert_to_wide(pdc_result);
+        *versions = pdc_result[0];
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_model_cpuid - Returns the CPU_ID.
+ * @cpu_id: The return buffer.
+ *
+ * Returns the CPU_ID value which uniquely identifies the cpu portion of
+ * the processor module.
+ */
+int pdc_model_cpuid(unsigned long *cpu_id)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
+        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
+        convert_to_wide(pdc_result);
+        *cpu_id = pdc_result[0];
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_model_capabilities - Returns the platform capabilities.
+ * @capabilities: The return buffer.
+ *
+ * Returns information about platform support for 32- and/or 64-bit
+ * OSes, IO-PDIR coherency, and virtual aliasing.
+ */
+int pdc_model_capabilities(unsigned long *capabilities)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
+        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
+        convert_to_wide(pdc_result);
+        if (retval == PDC_OK) {
+                *capabilities = pdc_result[0];
+        } else {
+                *capabilities = PDC_MODEL_OS32;
+        }
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_cache_info - Return cache and TLB information.
+ * @cache_info: The return buffer.
+ *
+ * Returns information about the processor's cache and TLB.
+ */
+int pdc_cache_info(struct pdc_cache_info *cache_info)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
+        convert_to_wide(pdc_result);
+        memcpy(cache_info, pdc_result, sizeof(*cache_info));
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/**
+ * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
+ * @space_bits: Should be 0, if not, bad mojo!
+ *
+ * Returns information about Space ID hashing.
+ */
+int pdc_spaceid_bits(unsigned long *space_bits)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	pdc_result[0] = 0;
+	retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
+	convert_to_wide(pdc_result);
+	*space_bits = pdc_result[0];
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+#ifndef CONFIG_PA20
+/**
+ * pdc_btlb_info - Return block TLB information.
+ * @btlb: The return buffer.
+ *
+ * Returns information about the hardware Block TLB.
+ */
+int pdc_btlb_info(struct pdc_btlb_info *btlb) 
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
+        memcpy(btlb, pdc_result, sizeof(*btlb));
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        if(retval < 0) {
+                btlb->max_size = 0;
+        }
+        return retval;
+}
+
+/**
+ * pdc_mem_map_hpa - Find fixed module information.  
+ * @address: The return buffer
+ * @mod_path: pointer to dev path structure.
+ *
+ * This call was developed for S700 workstations to allow the kernel to find
+ * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
+ * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
+ * call.
+ *
+ * This call is supported by all existing S700 workstations (up to  Gecko).
+ */
+int pdc_mem_map_hpa(struct pdc_memory_map *address,
+		struct pdc_module_path *mod_path)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        memcpy(pdc_result2, mod_path, sizeof(*mod_path));
+        retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
+				__pa(pdc_result2));
+        memcpy(address, pdc_result, sizeof(*address));
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+#endif	/* !CONFIG_PA20 */
+
+/**
+ * pdc_lan_station_id - Get the LAN address.
+ * @lan_addr: The return buffer.
+ * @hpa: The network device HPA.
+ *
+ * Get the LAN station address when it is not directly available from the LAN hardware.
+ */
+int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
+			__pa(pdc_result), hpa);
+	if (retval < 0) {
+		/* FIXME: else read MAC from NVRAM */
+		memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
+	} else {
+		memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
+	}
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+EXPORT_SYMBOL(pdc_lan_station_id);
+
+/**
+ * pdc_stable_read - Read data from Stable Storage.
+ * @staddr: Stable Storage address to access.
+ * @memaddr: The memory address where Stable Storage data shall be copied.
+ * @count: number of bytes to transfer. count is multiple of 4.
+ *
+ * This PDC call reads from the Stable Storage address supplied in staddr
+ * and copies count bytes to the memory address memaddr.
+ * The call will fail if staddr+count > PDC_STABLE size.
+ */
+int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
+{
+       int retval;
+	unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
+       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
+               __pa(pdc_result), count);
+       convert_to_wide(pdc_result);
+       memcpy(memaddr, pdc_result, count);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
+       return retval;
+}
+EXPORT_SYMBOL(pdc_stable_read);
+
+/**
+ * pdc_stable_write - Write data to Stable Storage.
+ * @staddr: Stable Storage address to access.
+ * @memaddr: The memory address where Stable Storage data shall be read from.
+ * @count: number of bytes to transfer. count is multiple of 4.
+ *
+ * This PDC call reads count bytes from the supplied memaddr address,
+ * and copies count bytes to the Stable Storage address staddr.
+ * The call will fail if staddr+count > PDC_STABLE size.
+ */
+int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
+{
+       int retval;
+	unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
+       memcpy(pdc_result, memaddr, count);
+       convert_to_wide(pdc_result);
+       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
+               __pa(pdc_result), count);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
+       return retval;
+}
+EXPORT_SYMBOL(pdc_stable_write);
+
+/**
+ * pdc_stable_get_size - Get Stable Storage size in bytes.
+ * @size: pointer where the size will be stored.
+ *
+ * This PDC call returns the number of bytes in the processor's Stable
+ * Storage, which is the number of contiguous bytes implemented in Stable
+ * Storage starting from staddr=0. size in an unsigned 64-bit integer
+ * which is a multiple of four.
+ */
+int pdc_stable_get_size(unsigned long *size)
+{
+       int retval;
+	unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
+       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
+       *size = pdc_result[0];
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
+       return retval;
+}
+EXPORT_SYMBOL(pdc_stable_get_size);
+
+/**
+ * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
+ *
+ * This PDC call is meant to be used to check the integrity of the current
+ * contents of Stable Storage.
+ */
+int pdc_stable_verify_contents(void)
+{
+       int retval;
+	unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
+       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
+       return retval;
+}
+EXPORT_SYMBOL(pdc_stable_verify_contents);
+
+/**
+ * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
+ * the validity indicator.
+ *
+ * This PDC call will erase all contents of Stable Storage. Use with care!
+ */
+int pdc_stable_initialize(void)
+{
+       int retval;
+	unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
+       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
+       return retval;
+}
+EXPORT_SYMBOL(pdc_stable_initialize);
+
+/**
+ * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
+ * @hwpath: fully bc.mod style path to the device.
+ * @initiator: the array to return the result into
+ *
+ * Get the SCSI operational parameters from PDC.
+ * Needed since HPUX never used BIOS or symbios card NVRAM.
+ * Most ncr/sym cards won't have an entry and just use whatever
+ * capabilities of the card are (eg Ultra, LVD). But there are
+ * several cases where it's useful:
+ *    o set SCSI id for Multi-initiator clusters,
+ *    o cable too long (ie SE scsi 10Mhz won't support 6m length),
+ *    o bus width exported is less than what the interface chip supports.
+ */
+int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+
+/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
+#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
+	strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
+
+	retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, 
+			      __pa(pdc_result), __pa(hwpath));
+	if (retval < PDC_OK)
+		goto out;
+
+	if (pdc_result[0] < 16) {
+		initiator->host_id = pdc_result[0];
+	} else {
+		initiator->host_id = -1;
+	}
+
+	/*
+	 * Sprockets and Piranha return 20 or 40 (MT/s).  Prelude returns
+	 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
+	 */
+	switch (pdc_result[1]) {
+		case  1: initiator->factor = 50; break;
+		case  2: initiator->factor = 25; break;
+		case  5: initiator->factor = 12; break;
+		case 25: initiator->factor = 10; break;
+		case 20: initiator->factor = 12; break;
+		case 40: initiator->factor = 10; break;
+		default: initiator->factor = -1; break;
+	}
+
+	if (IS_SPROCKETS()) {
+		initiator->width = pdc_result[4];
+		initiator->mode = pdc_result[5];
+	} else {
+		initiator->width = -1;
+		initiator->mode = -1;
+	}
+
+ out:
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return (retval >= PDC_OK);
+}
+EXPORT_SYMBOL(pdc_get_initiator);
+
+
+/**
+ * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
+ * @num_entries: The return value.
+ * @hpa: The HPA for the device.
+ *
+ * This PDC function returns the number of entries in the specified cell's
+ * interrupt table.
+ * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
+ */ 
+int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 
+			      __pa(pdc_result), hpa);
+	convert_to_wide(pdc_result);
+	*num_entries = pdc_result[0];
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/** 
+ * pdc_pci_irt - Get the PCI interrupt routing table.
+ * @num_entries: The number of entries in the table.
+ * @hpa: The Hard Physical Address of the device.
+ * @tbl: 
+ *
+ * Get the PCI interrupt routing table for the device at the given HPA.
+ * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
+ */
+int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
+{
+	int retval;
+	unsigned long flags;
+
+	BUG_ON((unsigned long)tbl & 0x7);
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	pdc_result[0] = num_entries;
+	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 
+			      __pa(pdc_result), hpa, __pa(tbl));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+
+#if 0	/* UNTEST CODE - left here in case someone needs it */
+
+/** 
+ * pdc_pci_config_read - read PCI config space.
+ * @hpa		token from PDC to indicate which PCI device
+ * @pci_addr	configuration space address to read from
+ *
+ * Read PCI Configuration space *before* linux PCI subsystem is running.
+ */
+unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	pdc_result[0] = 0;
+	pdc_result[1] = 0;
+	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, 
+			      __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval ? ~0 : (unsigned int) pdc_result[0];
+}
+
+
+/** 
+ * pdc_pci_config_write - read PCI config space.
+ * @hpa		token from PDC to indicate which PCI device
+ * @pci_addr	configuration space address to write
+ * @val		value we want in the 32-bit register
+ *
+ * Write PCI Configuration space *before* linux PCI subsystem is running.
+ */
+void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	pdc_result[0] = 0;
+	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, 
+			      __pa(pdc_result), hpa,
+			      cfg_addr&~3UL, 4UL, (unsigned long) val);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+#endif /* UNTESTED CODE */
+
+/**
+ * pdc_tod_read - Read the Time-Of-Day clock.
+ * @tod: The return buffer:
+ *
+ * Read the Time-Of-Day clock
+ */
+int pdc_tod_read(struct pdc_tod *tod)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
+        convert_to_wide(pdc_result);
+        memcpy(tod, pdc_result, sizeof(*tod));
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+EXPORT_SYMBOL(pdc_tod_read);
+
+/**
+ * pdc_tod_set - Set the Time-Of-Day clock.
+ * @sec: The number of seconds since epoch.
+ * @usec: The number of micro seconds.
+ *
+ * Set the Time-Of-Day clock.
+ */ 
+int pdc_tod_set(unsigned long sec, unsigned long usec)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+EXPORT_SYMBOL(pdc_tod_set);
+
+#ifdef CONFIG_64BIT
+int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
+		struct pdc_memory_table *tbl, unsigned long entries)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
+	convert_to_wide(pdc_result);
+	memcpy(r_addr, pdc_result, sizeof(*r_addr));
+	memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+#endif /* CONFIG_64BIT */
+
+/* FIXME: Is this pdc used?  I could not find type reference to ftc_bitmap
+ * so I guessed at unsigned long.  Someone who knows what this does, can fix
+ * it later. :)
+ */
+int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
+                              PDC_FIRM_TEST_MAGIC, ftc_bitmap);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/*
+ * pdc_do_reset - Reset the system.
+ *
+ * Reset the system.
+ */
+int pdc_do_reset(void)
+{
+        int retval;
+	unsigned long flags;
+
+        spin_lock_irqsave(&pdc_lock, flags);
+        retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+        return retval;
+}
+
+/*
+ * pdc_soft_power_info - Enable soft power switch.
+ * @power_reg: address of soft power register
+ *
+ * Return the absolute address of the soft power switch register
+ */
+int __init pdc_soft_power_info(unsigned long *power_reg)
+{
+	int retval;
+	unsigned long flags;
+
+	*power_reg = (unsigned long) (-1);
+	
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
+	if (retval == PDC_OK) {
+                convert_to_wide(pdc_result);
+                *power_reg = f_extend(pdc_result[0]);
+	}
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/*
+ * pdc_soft_power_button - Control the soft power button behaviour
+ * @sw_control: 0 for hardware control, 1 for software control 
+ *
+ *
+ * This PDC function places the soft power button under software or
+ * hardware control.
+ * Under software control the OS may control to when to allow to shut 
+ * down the system. Under hardware control pressing the power button 
+ * powers off the system immediately.
+ */
+int pdc_soft_power_button(int sw_control)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/*
+ * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
+ * Primarily a problem on T600 (which parisc-linux doesn't support) but
+ * who knows what other platform firmware might do with this OS "hook".
+ */
+void pdc_io_reset(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+}
+
+/*
+ * pdc_io_reset_devices - Hack to Stop USB controller
+ *
+ * If PDC used the usb controller, the usb controller
+ * is still running and will crash the machines during iommu 
+ * setup, because of still running DMA. This PDC call
+ * stops the USB controller.
+ * Normally called after calling pdc_io_reset().
+ */
+void pdc_io_reset_devices(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+}
+
+/* locked by pdc_console_lock */
+static int __attribute__((aligned(8)))   iodc_retbuf[32];
+static char __attribute__((aligned(64))) iodc_dbuf[4096];
+
+/**
+ * pdc_iodc_print - Console print using IODC.
+ * @str: the string to output.
+ * @count: length of str
+ *
+ * Note that only these special chars are architected for console IODC io:
+ * BEL, BS, CR, and LF. Others are passed through.
+ * Since the HP console requires CR+LF to perform a 'newline', we translate
+ * "\n" to "\r\n".
+ */
+int pdc_iodc_print(const unsigned char *str, unsigned count)
+{
+	unsigned int i;
+	unsigned long flags;
+
+	for (i = 0; i < count;) {
+		switch(str[i]) {
+		case '\n':
+			iodc_dbuf[i+0] = '\r';
+			iodc_dbuf[i+1] = '\n';
+			i += 2;
+			goto print;
+		default:
+			iodc_dbuf[i] = str[i];
+			i++;
+			break;
+		}
+	}
+
+print:
+        spin_lock_irqsave(&pdc_lock, flags);
+        real32_call(PAGE0->mem_cons.iodc_io,
+                    (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
+                    PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
+                    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
+        spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return i;
+}
+
+/**
+ * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
+ *
+ * Read a character (non-blocking) from the PDC console, returns -1 if
+ * key is not present.
+ */
+int pdc_iodc_getc(void)
+{
+	int ch;
+	int status;
+	unsigned long flags;
+
+	/* Bail if no console input device. */
+	if (!PAGE0->mem_kbd.iodc_io)
+		return 0;
+	
+	/* wait for a keyboard (rs232)-input */
+	spin_lock_irqsave(&pdc_lock, flags);
+	real32_call(PAGE0->mem_kbd.iodc_io,
+		    (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
+		    PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 
+		    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
+
+	ch = *iodc_dbuf;
+	status = *iodc_retbuf;
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	if (status == 0)
+	    return -1;
+	
+	return ch;
+}
+
+int pdc_sti_call(unsigned long func, unsigned long flags,
+                 unsigned long inptr, unsigned long outputr,
+                 unsigned long glob_cfg)
+{
+        int retval;
+	unsigned long irqflags;
+
+        spin_lock_irqsave(&pdc_lock, irqflags);  
+        retval = real32_call(func, flags, inptr, outputr, glob_cfg);
+        spin_unlock_irqrestore(&pdc_lock, irqflags);
+
+        return retval;
+}
+EXPORT_SYMBOL(pdc_sti_call);
+
+#ifdef CONFIG_64BIT
+/**
+ * pdc_pat_cell_get_number - Returns the cell number.
+ * @cell_info: The return buffer.
+ *
+ * This PDC call returns the cell number of the cell from which the call
+ * is made.
+ */
+int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
+	memcpy(cell_info, pdc_result, sizeof(*cell_info));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_cell_module - Retrieve the cell's module information.
+ * @actcnt: The number of bytes written to mem_addr.
+ * @ploc: The physical location.
+ * @mod: The module index.
+ * @view_type: The view of the address type.
+ * @mem_addr: The return buffer.
+ *
+ * This PDC call returns information about each module attached to the cell
+ * at the specified location.
+ */
+int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
+			unsigned long view_type, void *mem_addr)
+{
+	int retval;
+	unsigned long flags;
+	static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 
+			      ploc, mod, view_type, __pa(&result));
+	if(!retval) {
+		*actcnt = pdc_result[0];
+		memcpy(mem_addr, &result, *actcnt);
+	}
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_cpu_get_number - Retrieve the cpu number.
+ * @cpu_info: The return buffer.
+ * @hpa: The Hard Physical Address of the CPU.
+ *
+ * Retrieve the cpu number for the cpu at the specified HPA.
+ */
+int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
+			      __pa(&pdc_result), hpa);
+	memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
+ * @num_entries: The return value.
+ * @cell_num: The target cell.
+ *
+ * This PDC function returns the number of entries in the specified cell's
+ * interrupt table.
+ */
+int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
+			      __pa(pdc_result), cell_num);
+	*num_entries = pdc_result[0];
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_get_irt - Retrieve the cell's interrupt table.
+ * @r_addr: The return buffer.
+ * @cell_num: The target cell.
+ *
+ * This PDC function returns the actual interrupt table for the specified cell.
+ */
+int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
+			      __pa(r_addr), cell_num);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
+ * @actlen: The return buffer.
+ * @mem_addr: Pointer to the memory buffer.
+ * @count: The number of bytes to read from the buffer.
+ * @offset: The offset with respect to the beginning of the buffer.
+ *
+ */
+int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, 
+			    unsigned long count, unsigned long offset)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 
+			      __pa(pdc_result2), count, offset);
+	*actual_len = pdc_result[0];
+	memcpy(mem_addr, pdc_result2, *actual_len);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
+ * @pci_addr: PCI configuration space address for which the read request is being made.
+ * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. 
+ * @mem_addr: Pointer to return memory buffer.
+ *
+ */
+int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
+					__pa(pdc_result), pci_addr, pci_size);
+	switch(pci_size) {
+		case 1: *(u8 *) mem_addr =  (u8)  pdc_result[0];
+		case 2: *(u16 *)mem_addr =  (u16) pdc_result[0];
+		case 4: *(u32 *)mem_addr =  (u32) pdc_result[0];
+	}
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+
+/**
+ * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
+ * @pci_addr: PCI configuration space address for which the write  request is being made.
+ * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 
+ * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 
+ *         written to PCI Config space.
+ *
+ */
+int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
+				pci_addr, pci_size, val);
+	spin_unlock_irqrestore(&pdc_lock, flags);
+
+	return retval;
+}
+#endif /* CONFIG_64BIT */
+
+
+/***************** 32-bit real-mode calls ***********/
+/* The struct below is used
+ * to overlay real_stack (real2.S), preparing a 32-bit call frame.
+ * real32_call_asm() then uses this stack in narrow real mode
+ */
+
+struct narrow_stack {
+	/* use int, not long which is 64 bits */
+	unsigned int arg13;
+	unsigned int arg12;
+	unsigned int arg11;
+	unsigned int arg10;
+	unsigned int arg9;
+	unsigned int arg8;
+	unsigned int arg7;
+	unsigned int arg6;
+	unsigned int arg5;
+	unsigned int arg4;
+	unsigned int arg3;
+	unsigned int arg2;
+	unsigned int arg1;
+	unsigned int arg0;
+	unsigned int frame_marker[8];
+	unsigned int sp;
+	/* in reality, there's nearly 8k of stack after this */
+};
+
+long real32_call(unsigned long fn, ...)
+{
+	va_list args;
+	extern struct narrow_stack real_stack;
+	extern unsigned long real32_call_asm(unsigned int *,
+					     unsigned int *, 
+					     unsigned int);
+	
+	va_start(args, fn);
+	real_stack.arg0 = va_arg(args, unsigned int);
+	real_stack.arg1 = va_arg(args, unsigned int);
+	real_stack.arg2 = va_arg(args, unsigned int);
+	real_stack.arg3 = va_arg(args, unsigned int);
+	real_stack.arg4 = va_arg(args, unsigned int);
+	real_stack.arg5 = va_arg(args, unsigned int);
+	real_stack.arg6 = va_arg(args, unsigned int);
+	real_stack.arg7 = va_arg(args, unsigned int);
+	real_stack.arg8 = va_arg(args, unsigned int);
+	real_stack.arg9 = va_arg(args, unsigned int);
+	real_stack.arg10 = va_arg(args, unsigned int);
+	real_stack.arg11 = va_arg(args, unsigned int);
+	real_stack.arg12 = va_arg(args, unsigned int);
+	real_stack.arg13 = va_arg(args, unsigned int);
+	va_end(args);
+	
+	return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
+}
+
+#ifdef CONFIG_64BIT
+/***************** 64-bit real-mode calls ***********/
+
+struct wide_stack {
+	unsigned long arg0;
+	unsigned long arg1;
+	unsigned long arg2;
+	unsigned long arg3;
+	unsigned long arg4;
+	unsigned long arg5;
+	unsigned long arg6;
+	unsigned long arg7;
+	unsigned long arg8;
+	unsigned long arg9;
+	unsigned long arg10;
+	unsigned long arg11;
+	unsigned long arg12;
+	unsigned long arg13;
+	unsigned long frame_marker[2];	/* rp, previous sp */
+	unsigned long sp;
+	/* in reality, there's nearly 8k of stack after this */
+};
+
+long real64_call(unsigned long fn, ...)
+{
+	va_list args;
+	extern struct wide_stack real64_stack;
+	extern unsigned long real64_call_asm(unsigned long *,
+					     unsigned long *, 
+					     unsigned long);
+    
+	va_start(args, fn);
+	real64_stack.arg0 = va_arg(args, unsigned long);
+	real64_stack.arg1 = va_arg(args, unsigned long);
+	real64_stack.arg2 = va_arg(args, unsigned long);
+	real64_stack.arg3 = va_arg(args, unsigned long);
+	real64_stack.arg4 = va_arg(args, unsigned long);
+	real64_stack.arg5 = va_arg(args, unsigned long);
+	real64_stack.arg6 = va_arg(args, unsigned long);
+	real64_stack.arg7 = va_arg(args, unsigned long);
+	real64_stack.arg8 = va_arg(args, unsigned long);
+	real64_stack.arg9 = va_arg(args, unsigned long);
+	real64_stack.arg10 = va_arg(args, unsigned long);
+	real64_stack.arg11 = va_arg(args, unsigned long);
+	real64_stack.arg12 = va_arg(args, unsigned long);
+	real64_stack.arg13 = va_arg(args, unsigned long);
+	va_end(args);
+	
+	return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
+}
+
+#endif /* CONFIG_64BIT */
+