Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1023 insertions, 0 deletions

diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
new file mode 100644
index 000000000000..25e7c8344564
--- /dev/null
+++ b/arch/ia64/kernel/palinfo.c
@@ -0,0 +1,1023 @@
+/*
+ * palinfo.c
+ *
+ * Prints processor specific information reported by PAL.
+ * This code is based on specification of PAL as of the
+ * Intel IA-64 Architecture Software Developer's Manual v1.0.
+ *
+ *
+ * Copyright (C) 2000-2001, 2003 Hewlett-Packard Co
+ *	Stephane Eranian <eranian@hpl.hp.com>
+ * Copyright (C) 2004 Intel Corporation
+ *  Ashok Raj <ashok.raj@intel.com>
+ *
+ * 05/26/2000	S.Eranian	initial release
+ * 08/21/2000	S.Eranian	updated to July 2000 PAL specs
+ * 02/05/2001   S.Eranian	fixed module support
+ * 10/23/2001	S.Eranian	updated pal_perf_mon_info bug fixes
+ * 03/24/2004	Ashok Raj	updated to work with CPU Hotplug
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/efi.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+
+#include <asm/pal.h>
+#include <asm/sal.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <linux/smp.h>
+
+MODULE_AUTHOR("Stephane Eranian <eranian@hpl.hp.com>");
+MODULE_DESCRIPTION("/proc interface to IA-64 PAL");
+MODULE_LICENSE("GPL");
+
+#define PALINFO_VERSION "0.5"
+
+typedef int (*palinfo_func_t)(char*);
+
+typedef struct {
+	const char		*name;		/* name of the proc entry */
+	palinfo_func_t		proc_read;	/* function to call for reading */
+	struct proc_dir_entry	*entry;		/* registered entry (removal) */
+} palinfo_entry_t;
+
+
+/*
+ *  A bunch of string array to get pretty printing
+ */
+
+static char *cache_types[] = {
+	"",			/* not used */
+	"Instruction",
+	"Data",
+	"Data/Instruction"	/* unified */
+};
+
+static const char *cache_mattrib[]={
+	"WriteThrough",
+	"WriteBack",
+	"",		/* reserved */
+	""		/* reserved */
+};
+
+static const char *cache_st_hints[]={
+	"Temporal, level 1",
+	"Reserved",
+	"Reserved",
+	"Non-temporal, all levels",
+	"Reserved",
+	"Reserved",
+	"Reserved",
+	"Reserved"
+};
+
+static const char *cache_ld_hints[]={
+	"Temporal, level 1",
+	"Non-temporal, level 1",
+	"Reserved",
+	"Non-temporal, all levels",
+	"Reserved",
+	"Reserved",
+	"Reserved",
+	"Reserved"
+};
+
+static const char *rse_hints[]={
+	"enforced lazy",
+	"eager stores",
+	"eager loads",
+	"eager loads and stores"
+};
+
+#define RSE_HINTS_COUNT ARRAY_SIZE(rse_hints)
+
+static const char *mem_attrib[]={
+	"WB",		/* 000 */
+	"SW",		/* 001 */
+	"010",		/* 010 */
+	"011",		/* 011 */
+	"UC",		/* 100 */
+	"UCE",		/* 101 */
+	"WC",		/* 110 */
+	"NaTPage"	/* 111 */
+};
+
+/*
+ * Take a 64bit vector and produces a string such that
+ * if bit n is set then 2^n in clear text is generated. The adjustment
+ * to the right unit is also done.
+ *
+ * Input:
+ *	- a pointer to a buffer to hold the string
+ *	- a 64-bit vector
+ * Ouput:
+ *	- a pointer to the end of the buffer
+ *
+ */
+static char *
+bitvector_process(char *p, u64 vector)
+{
+	int i,j;
+	const char *units[]={ "", "K", "M", "G", "T" };
+
+	for (i=0, j=0; i < 64; i++ , j=i/10) {
+		if (vector & 0x1) {
+			p += sprintf(p, "%d%s ", 1 << (i-j*10), units[j]);
+		}
+		vector >>= 1;
+	}
+	return p;
+}
+
+/*
+ * Take a 64bit vector and produces a string such that
+ * if bit n is set then register n is present. The function
+ * takes into account consecutive registers and prints out ranges.
+ *
+ * Input:
+ *	- a pointer to a buffer to hold the string
+ *	- a 64-bit vector
+ * Ouput:
+ *	- a pointer to the end of the buffer
+ *
+ */
+static char *
+bitregister_process(char *p, u64 *reg_info, int max)
+{
+	int i, begin, skip = 0;
+	u64 value = reg_info[0];
+
+	value >>= i = begin = ffs(value) - 1;
+
+	for(; i < max; i++ ) {
+
+		if (i != 0 && (i%64) == 0) value = *++reg_info;
+
+		if ((value & 0x1) == 0 && skip == 0) {
+			if (begin  <= i - 2)
+				p += sprintf(p, "%d-%d ", begin, i-1);
+			else
+				p += sprintf(p, "%d ", i-1);
+			skip  = 1;
+			begin = -1;
+		} else if ((value & 0x1) && skip == 1) {
+			skip = 0;
+			begin = i;
+		}
+		value >>=1;
+	}
+	if (begin > -1) {
+		if (begin < 127)
+			p += sprintf(p, "%d-127", begin);
+		else
+			p += sprintf(p, "127");
+	}
+
+	return p;
+}
+
+static int
+power_info(char *page)
+{
+	s64 status;
+	char *p = page;
+	u64 halt_info_buffer[8];
+	pal_power_mgmt_info_u_t *halt_info =(pal_power_mgmt_info_u_t *)halt_info_buffer;
+	int i;
+
+	status = ia64_pal_halt_info(halt_info);
+	if (status != 0) return 0;
+
+	for (i=0; i < 8 ; i++ ) {
+		if (halt_info[i].pal_power_mgmt_info_s.im == 1) {
+			p += sprintf(p,	"Power level %d:\n"
+				     "\tentry_latency       : %d cycles\n"
+				     "\texit_latency        : %d cycles\n"
+				     "\tpower consumption   : %d mW\n"
+				     "\tCache+TLB coherency : %s\n", i,
+				     halt_info[i].pal_power_mgmt_info_s.entry_latency,
+				     halt_info[i].pal_power_mgmt_info_s.exit_latency,
+				     halt_info[i].pal_power_mgmt_info_s.power_consumption,
+				     halt_info[i].pal_power_mgmt_info_s.co ? "Yes" : "No");
+		} else {
+			p += sprintf(p,"Power level %d: not implemented\n",i);
+		}
+	}
+	return p - page;
+}
+
+static int
+cache_info(char *page)
+{
+	char *p = page;
+	u64 i, levels, unique_caches;
+	pal_cache_config_info_t cci;
+	int j, k;
+	s64 status;
+
+	if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
+		printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
+		return 0;
+	}
+
+	p += sprintf(p, "Cache levels  : %ld\nUnique caches : %ld\n\n", levels, unique_caches);
+
+	for (i=0; i < levels; i++) {
+
+		for (j=2; j >0 ; j--) {
+
+			/* even without unification some level may not be present */
+			if ((status=ia64_pal_cache_config_info(i,j, &cci)) != 0) {
+				continue;
+			}
+			p += sprintf(p,
+				     "%s Cache level %lu:\n"
+				     "\tSize           : %lu bytes\n"
+				     "\tAttributes     : ",
+				     cache_types[j+cci.pcci_unified], i+1,
+				     cci.pcci_cache_size);
+
+			if (cci.pcci_unified) p += sprintf(p, "Unified ");
+
+			p += sprintf(p, "%s\n", cache_mattrib[cci.pcci_cache_attr]);
+
+			p += sprintf(p,
+				     "\tAssociativity  : %d\n"
+				     "\tLine size      : %d bytes\n"
+				     "\tStride         : %d bytes\n",
+				     cci.pcci_assoc, 1<<cci.pcci_line_size, 1<<cci.pcci_stride);
+			if (j == 1)
+				p += sprintf(p, "\tStore latency  : N/A\n");
+			else
+				p += sprintf(p, "\tStore latency  : %d cycle(s)\n",
+						cci.pcci_st_latency);
+
+			p += sprintf(p,
+				     "\tLoad latency   : %d cycle(s)\n"
+				     "\tStore hints    : ", cci.pcci_ld_latency);
+
+			for(k=0; k < 8; k++ ) {
+				if ( cci.pcci_st_hints & 0x1)
+					p += sprintf(p, "[%s]", cache_st_hints[k]);
+				cci.pcci_st_hints >>=1;
+			}
+			p += sprintf(p, "\n\tLoad hints     : ");
+
+			for(k=0; k < 8; k++ ) {
+				if (cci.pcci_ld_hints & 0x1)
+					p += sprintf(p, "[%s]", cache_ld_hints[k]);
+				cci.pcci_ld_hints >>=1;
+			}
+			p += sprintf(p,
+				     "\n\tAlias boundary : %d byte(s)\n"
+				     "\tTag LSB        : %d\n"
+				     "\tTag MSB        : %d\n",
+				     1<<cci.pcci_alias_boundary, cci.pcci_tag_lsb,
+				     cci.pcci_tag_msb);
+
+			/* when unified, data(j=2) is enough */
+			if (cci.pcci_unified) break;
+		}
+	}
+	return p - page;
+}
+
+
+static int
+vm_info(char *page)
+{
+	char *p = page;
+	u64 tr_pages =0, vw_pages=0, tc_pages;
+	u64 attrib;
+	pal_vm_info_1_u_t vm_info_1;
+	pal_vm_info_2_u_t vm_info_2;
+	pal_tc_info_u_t	tc_info;
+	ia64_ptce_info_t ptce;
+	const char *sep;
+	int i, j;
+	s64 status;
+
+	if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
+		printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
+		return 0;
+	}
+
+
+	p += sprintf(p,
+		     "Physical Address Space         : %d bits\n"
+		     "Virtual Address Space          : %d bits\n"
+		     "Protection Key Registers(PKR)  : %d\n"
+		     "Implemented bits in PKR.key    : %d\n"
+		     "Hash Tag ID                    : 0x%x\n"
+		     "Size of RR.rid                 : %d\n",
+		     vm_info_1.pal_vm_info_1_s.phys_add_size,
+		     vm_info_2.pal_vm_info_2_s.impl_va_msb+1, vm_info_1.pal_vm_info_1_s.max_pkr+1,
+		     vm_info_1.pal_vm_info_1_s.key_size, vm_info_1.pal_vm_info_1_s.hash_tag_id,
+		     vm_info_2.pal_vm_info_2_s.rid_size);
+
+	if (ia64_pal_mem_attrib(&attrib) != 0)
+		return 0;
+
+	p += sprintf(p, "Supported memory attributes    : ");
+	sep = "";
+	for (i = 0; i < 8; i++) {
+		if (attrib & (1 << i)) {
+			p += sprintf(p, "%s%s", sep, mem_attrib[i]);
+			sep = ", ";
+		}
+	}
+	p += sprintf(p, "\n");
+
+	if ((status = ia64_pal_vm_page_size(&tr_pages, &vw_pages)) !=0) {
+		printk(KERN_ERR "ia64_pal_vm_page_size=%ld\n", status);
+		return 0;
+	}
+
+	p += sprintf(p,
+		     "\nTLB walker                     : %simplemented\n"
+		     "Number of DTR                  : %d\n"
+		     "Number of ITR                  : %d\n"
+		     "TLB insertable page sizes      : ",
+		     vm_info_1.pal_vm_info_1_s.vw ? "" : "not ",
+		     vm_info_1.pal_vm_info_1_s.max_dtr_entry+1,
+		     vm_info_1.pal_vm_info_1_s.max_itr_entry+1);
+
+
+	p = bitvector_process(p, tr_pages);
+
+	p += sprintf(p, "\nTLB purgeable page sizes       : ");
+
+	p = bitvector_process(p, vw_pages);
+
+	if ((status=ia64_get_ptce(&ptce)) != 0) {
+		printk(KERN_ERR "ia64_get_ptce=%ld\n", status);
+		return 0;
+	}
+
+	p += sprintf(p,
+		     "\nPurge base address             : 0x%016lx\n"
+		     "Purge outer loop count         : %d\n"
+		     "Purge inner loop count         : %d\n"
+		     "Purge outer loop stride        : %d\n"
+		     "Purge inner loop stride        : %d\n",
+		     ptce.base, ptce.count[0], ptce.count[1], ptce.stride[0], ptce.stride[1]);
+
+	p += sprintf(p,
+		     "TC Levels                      : %d\n"
+		     "Unique TC(s)                   : %d\n",
+		     vm_info_1.pal_vm_info_1_s.num_tc_levels,
+		     vm_info_1.pal_vm_info_1_s.max_unique_tcs);
+
+	for(i=0; i < vm_info_1.pal_vm_info_1_s.num_tc_levels; i++) {
+		for (j=2; j>0 ; j--) {
+			tc_pages = 0; /* just in case */
+
+
+			/* even without unification, some levels may not be present */
+			if ((status=ia64_pal_vm_info(i,j, &tc_info, &tc_pages)) != 0) {
+				continue;
+			}
+
+			p += sprintf(p,
+				     "\n%s Translation Cache Level %d:\n"
+				     "\tHash sets           : %d\n"
+				     "\tAssociativity       : %d\n"
+				     "\tNumber of entries   : %d\n"
+				     "\tFlags               : ",
+				     cache_types[j+tc_info.tc_unified], i+1, tc_info.tc_num_sets,
+				     tc_info.tc_associativity, tc_info.tc_num_entries);
+
+			if (tc_info.tc_pf) p += sprintf(p, "PreferredPageSizeOptimized ");
+			if (tc_info.tc_unified) p += sprintf(p, "Unified ");
+			if (tc_info.tc_reduce_tr) p += sprintf(p, "TCReduction");
+
+			p += sprintf(p, "\n\tSupported page sizes: ");
+
+			p = bitvector_process(p, tc_pages);
+
+			/* when unified date (j=2) is enough */
+			if (tc_info.tc_unified) break;
+		}
+	}
+	p += sprintf(p, "\n");
+
+	return p - page;
+}
+
+
+static int
+register_info(char *page)
+{
+	char *p = page;
+	u64 reg_info[2];
+	u64 info;
+	u64 phys_stacked;
+	pal_hints_u_t hints;
+	u64 iregs, dregs;
+	char *info_type[]={
+		"Implemented AR(s)",
+		"AR(s) with read side-effects",
+		"Implemented CR(s)",
+		"CR(s) with read side-effects",
+	};
+
+	for(info=0; info < 4; info++) {
+
+		if (ia64_pal_register_info(info, &reg_info[0], &reg_info[1]) != 0) return 0;
+
+		p += sprintf(p, "%-32s : ", info_type[info]);
+
+		p = bitregister_process(p, reg_info, 128);
+
+		p += sprintf(p, "\n");
+	}
+
+	if (ia64_pal_rse_info(&phys_stacked, &hints) != 0) return 0;
+
+	p += sprintf(p,
+		     "RSE stacked physical registers   : %ld\n"
+		     "RSE load/store hints             : %ld (%s)\n",
+		     phys_stacked, hints.ph_data,
+		     hints.ph_data < RSE_HINTS_COUNT ? rse_hints[hints.ph_data]: "(??)");
+
+	if (ia64_pal_debug_info(&iregs, &dregs))
+		return 0;
+
+	p += sprintf(p,
+		     "Instruction debug register pairs : %ld\n"
+		     "Data debug register pairs        : %ld\n", iregs, dregs);
+
+	return p - page;
+}
+
+static const char *proc_features[]={
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL, NULL,NULL,NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL,
+	"XIP,XPSR,XFS implemented",
+	"XR1-XR3 implemented",
+	"Disable dynamic predicate prediction",
+	"Disable processor physical number",
+	"Disable dynamic data cache prefetch",
+	"Disable dynamic inst cache prefetch",
+	"Disable dynamic branch prediction",
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	"Disable BINIT on processor time-out",
+	"Disable dynamic power management (DPM)",
+	"Disable coherency",
+	"Disable cache",
+	"Enable CMCI promotion",
+	"Enable MCA to BINIT promotion",
+	"Enable MCA promotion",
+	"Enable BERR promotion"
+};
+
+
+static int
+processor_info(char *page)
+{
+	char *p = page;
+	const char **v = proc_features;
+	u64 avail=1, status=1, control=1;
+	int i;
+	s64 ret;
+
+	if ((ret=ia64_pal_proc_get_features(&avail, &status, &control)) != 0) return 0;
+
+	for(i=0; i < 64; i++, v++,avail >>=1, status >>=1, control >>=1) {
+		if ( ! *v ) continue;
+		p += sprintf(p, "%-40s : %s%s %s\n", *v,
+				avail & 0x1 ? "" : "NotImpl",
+				avail & 0x1 ? (status & 0x1 ? "On" : "Off"): "",
+				avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
+	}
+	return p - page;
+}
+
+static const char *bus_features[]={
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
+	NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+	NULL,NULL,
+	"Request  Bus Parking",
+	"Bus Lock Mask",
+	"Enable Half Transfer",
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL,
+	"Enable Cache Line Repl. Shared",
+	"Enable Cache Line Repl. Exclusive",
+	"Disable Transaction Queuing",
+	"Disable Response Error Checking",
+	"Disable Bus Error Checking",
+	"Disable Bus Requester Internal Error Signalling",
+	"Disable Bus Requester Error Signalling",
+	"Disable Bus Initialization Event Checking",
+	"Disable Bus Initialization Event Signalling",
+	"Disable Bus Address Error Checking",
+	"Disable Bus Address Error Signalling",
+	"Disable Bus Data Error Checking"
+};
+
+
+static int
+bus_info(char *page)
+{
+	char *p = page;
+	const char **v = bus_features;
+	pal_bus_features_u_t av, st, ct;
+	u64 avail, status, control;
+	int i;
+	s64 ret;
+
+	if ((ret=ia64_pal_bus_get_features(&av, &st, &ct)) != 0) return 0;
+
+	avail   = av.pal_bus_features_val;
+	status  = st.pal_bus_features_val;
+	control = ct.pal_bus_features_val;
+
+	for(i=0; i < 64; i++, v++, avail >>=1, status >>=1, control >>=1) {
+		if ( ! *v ) continue;
+		p += sprintf(p, "%-48s : %s%s %s\n", *v,
+				avail & 0x1 ? "" : "NotImpl",
+				avail & 0x1 ? (status  & 0x1 ? "On" : "Off"): "",
+				avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
+	}
+	return p - page;
+}
+
+static int
+version_info(char *page)
+{
+	pal_version_u_t min_ver, cur_ver;
+	char *p = page;
+
+	/* The PAL_VERSION call is advertised as being able to support
+	 * both physical and virtual mode calls. This seems to be a documentation
+	 * bug rather than firmware bug. In fact, it does only support physical mode.
+	 * So now the code reflects this fact and the pal_version() has been updated
+	 * accordingly.
+	 */
+	if (ia64_pal_version(&min_ver, &cur_ver) != 0) return 0;
+
+	p += sprintf(p,
+		     "PAL_vendor : 0x%02x (min=0x%02x)\n"
+		     "PAL_A      : %x.%x.%x (min=%x.%x.%x)\n"
+		     "PAL_B      : %x.%x.%x (min=%x.%x.%x)\n",
+		     cur_ver.pal_version_s.pv_pal_vendor, min_ver.pal_version_s.pv_pal_vendor,
+
+		     cur_ver.pal_version_s.pv_pal_a_model>>4,
+		     cur_ver.pal_version_s.pv_pal_a_model&0xf, cur_ver.pal_version_s.pv_pal_a_rev,
+		     min_ver.pal_version_s.pv_pal_a_model>>4,
+		     min_ver.pal_version_s.pv_pal_a_model&0xf, min_ver.pal_version_s.pv_pal_a_rev,
+
+		     cur_ver.pal_version_s.pv_pal_b_model>>4,
+		     cur_ver.pal_version_s.pv_pal_b_model&0xf, cur_ver.pal_version_s.pv_pal_b_rev,
+		     min_ver.pal_version_s.pv_pal_b_model>>4,
+		     min_ver.pal_version_s.pv_pal_b_model&0xf, min_ver.pal_version_s.pv_pal_b_rev);
+	return p - page;
+}
+
+static int
+perfmon_info(char *page)
+{
+	char *p = page;
+	u64 pm_buffer[16];
+	pal_perf_mon_info_u_t pm_info;
+
+	if (ia64_pal_perf_mon_info(pm_buffer, &pm_info) != 0) return 0;
+
+	p += sprintf(p,
+		     "PMC/PMD pairs                 : %d\n"
+		     "Counter width                 : %d bits\n"
+		     "Cycle event number            : %d\n"
+		     "Retired event number          : %d\n"
+		     "Implemented PMC               : ",
+		     pm_info.pal_perf_mon_info_s.generic, pm_info.pal_perf_mon_info_s.width,
+		     pm_info.pal_perf_mon_info_s.cycles, pm_info.pal_perf_mon_info_s.retired);
+
+	p = bitregister_process(p, pm_buffer, 256);
+	p += sprintf(p, "\nImplemented PMD               : ");
+	p = bitregister_process(p, pm_buffer+4, 256);
+	p += sprintf(p, "\nCycles count capable          : ");
+	p = bitregister_process(p, pm_buffer+8, 256);
+	p += sprintf(p, "\nRetired bundles count capable : ");
+
+#ifdef CONFIG_ITANIUM
+	/*
+	 * PAL_PERF_MON_INFO reports that only PMC4 can be used to count CPU_CYCLES
+	 * which is wrong, both PMC4 and PMD5 support it.
+	 */
+	if (pm_buffer[12] == 0x10) pm_buffer[12]=0x30;
+#endif
+
+	p = bitregister_process(p, pm_buffer+12, 256);
+
+	p += sprintf(p, "\n");
+
+	return p - page;
+}
+
+static int
+frequency_info(char *page)
+{
+	char *p = page;
+	struct pal_freq_ratio proc, itc, bus;
+	u64 base;
+
+	if (ia64_pal_freq_base(&base) == -1)
+		p += sprintf(p, "Output clock            : not implemented\n");
+	else
+		p += sprintf(p, "Output clock            : %ld ticks/s\n", base);
+
+	if (ia64_pal_freq_ratios(&proc, &bus, &itc) != 0) return 0;
+
+	p += sprintf(p,
+		     "Processor/Clock ratio   : %ld/%ld\n"
+		     "Bus/Clock ratio         : %ld/%ld\n"
+		     "ITC/Clock ratio         : %ld/%ld\n",
+		     proc.num, proc.den, bus.num, bus.den, itc.num, itc.den);
+
+	return p - page;
+}
+
+static int
+tr_info(char *page)
+{
+	char *p = page;
+	s64 status;
+	pal_tr_valid_u_t tr_valid;
+	u64 tr_buffer[4];
+	pal_vm_info_1_u_t vm_info_1;
+	pal_vm_info_2_u_t vm_info_2;
+	u64 i, j;
+	u64 max[3], pgm;
+	struct ifa_reg {
+		u64 valid:1;
+		u64 ig:11;
+		u64 vpn:52;
+	} *ifa_reg;
+	struct itir_reg {
+		u64 rv1:2;
+		u64 ps:6;
+		u64 key:24;
+		u64 rv2:32;
+	} *itir_reg;
+	struct gr_reg {
+		u64 p:1;
+		u64 rv1:1;
+		u64 ma:3;
+		u64 a:1;
+		u64 d:1;
+		u64 pl:2;
+		u64 ar:3;
+		u64 ppn:38;
+		u64 rv2:2;
+		u64 ed:1;
+		u64 ig:11;
+	} *gr_reg;
+	struct rid_reg {
+		u64 ig1:1;
+		u64 rv1:1;
+		u64 ig2:6;
+		u64 rid:24;
+		u64 rv2:32;
+	} *rid_reg;
+
+	if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
+		printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
+		return 0;
+	}
+	max[0] = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
+	max[1] = vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
+
+	for (i=0; i < 2; i++ ) {
+		for (j=0; j < max[i]; j++) {
+
+		status = ia64_pal_tr_read(j, i, tr_buffer, &tr_valid);
+		if (status != 0) {
+			printk(KERN_ERR "palinfo: pal call failed on tr[%lu:%lu]=%ld\n",
+			       i, j, status);
+			continue;
+		}
+
+		ifa_reg  = (struct ifa_reg *)&tr_buffer[2];
+
+		if (ifa_reg->valid == 0) continue;
+
+		gr_reg   = (struct gr_reg *)tr_buffer;
+		itir_reg = (struct itir_reg *)&tr_buffer[1];
+		rid_reg  = (struct rid_reg *)&tr_buffer[3];
+
+		pgm	 = -1 << (itir_reg->ps - 12);
+		p += sprintf(p,
+			     "%cTR%lu: av=%d pv=%d dv=%d mv=%d\n"
+			     "\tppn  : 0x%lx\n"
+			     "\tvpn  : 0x%lx\n"
+			     "\tps   : ",
+			     "ID"[i], j,
+			     tr_valid.pal_tr_valid_s.access_rights_valid,
+			     tr_valid.pal_tr_valid_s.priv_level_valid,
+			     tr_valid.pal_tr_valid_s.dirty_bit_valid,
+			     tr_valid.pal_tr_valid_s.mem_attr_valid,
+			     (gr_reg->ppn & pgm)<< 12, (ifa_reg->vpn & pgm)<< 12);
+
+		p = bitvector_process(p, 1<< itir_reg->ps);
+
+		p += sprintf(p,
+			     "\n\tpl   : %d\n"
+			     "\tar   : %d\n"
+			     "\trid  : %x\n"
+			     "\tp    : %d\n"
+			     "\tma   : %d\n"
+			     "\td    : %d\n",
+			     gr_reg->pl, gr_reg->ar, rid_reg->rid, gr_reg->p, gr_reg->ma,
+			     gr_reg->d);
+		}
+	}
+	return p - page;
+}
+
+
+
+/*
+ * List {name,function} pairs for every entry in /proc/palinfo/cpu*
+ */
+static palinfo_entry_t palinfo_entries[]={
+	{ "version_info",	version_info, },
+	{ "vm_info",		vm_info, },
+	{ "cache_info",		cache_info, },
+	{ "power_info",		power_info, },
+	{ "register_info",	register_info, },
+	{ "processor_info",	processor_info, },
+	{ "perfmon_info",	perfmon_info, },
+	{ "frequency_info",	frequency_info, },
+	{ "bus_info",		bus_info },
+	{ "tr_info",		tr_info, }
+};
+
+#define NR_PALINFO_ENTRIES	(int) ARRAY_SIZE(palinfo_entries)
+
+/*
+ * this array is used to keep track of the proc entries we create. This is
+ * required in the module mode when we need to remove all entries. The procfs code
+ * does not do recursion of deletion
+ *
+ * Notes:
+ *	- +1 accounts for the cpuN directory entry in /proc/pal
+ */
+#define NR_PALINFO_PROC_ENTRIES	(NR_CPUS*(NR_PALINFO_ENTRIES+1))
+
+static struct proc_dir_entry *palinfo_proc_entries[NR_PALINFO_PROC_ENTRIES];
+static struct proc_dir_entry *palinfo_dir;
+
+/*
+ * This data structure is used to pass which cpu,function is being requested
+ * It must fit in a 64bit quantity to be passed to the proc callback routine
+ *
+ * In SMP mode, when we get a request for another CPU, we must call that
+ * other CPU using IPI and wait for the result before returning.
+ */
+typedef union {
+	u64 value;
+	struct {
+		unsigned	req_cpu: 32;	/* for which CPU this info is */
+		unsigned	func_id: 32;	/* which function is requested */
+	} pal_func_cpu;
+} pal_func_cpu_u_t;
+
+#define req_cpu	pal_func_cpu.req_cpu
+#define func_id pal_func_cpu.func_id
+
+#ifdef CONFIG_SMP
+
+/*
+ * used to hold information about final function to call
+ */
+typedef struct {
+	palinfo_func_t	func;	/* pointer to function to call */
+	char		*page;	/* buffer to store results */
+	int		ret;	/* return value from call */
+} palinfo_smp_data_t;
+
+
+/*
+ * this function does the actual final call and he called
+ * from the smp code, i.e., this is the palinfo callback routine
+ */
+static void
+palinfo_smp_call(void *info)
+{
+	palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
+	if (data == NULL) {
+		printk(KERN_ERR "palinfo: data pointer is NULL\n");
+		data->ret = 0; /* no output */
+		return;
+	}
+	/* does this actual call */
+	data->ret = (*data->func)(data->page);
+}
+
+/*
+ * function called to trigger the IPI, we need to access a remote CPU
+ * Return:
+ *	0 : error or nothing to output
+ *	otherwise how many bytes in the "page" buffer were written
+ */
+static
+int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
+{
+	palinfo_smp_data_t ptr;
+	int ret;
+
+	ptr.func = palinfo_entries[f->func_id].proc_read;
+	ptr.page = page;
+	ptr.ret  = 0; /* just in case */
+
+
+	/* will send IPI to other CPU and wait for completion of remote call */
+	if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
+		printk(KERN_ERR "palinfo: remote CPU call from %d to %d on function %d: "
+		       "error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
+		return 0;
+	}
+	return ptr.ret;
+}
+#else /* ! CONFIG_SMP */
+static
+int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
+{
+	printk(KERN_ERR "palinfo: should not be called with non SMP kernel\n");
+	return 0;
+}
+#endif /* CONFIG_SMP */
+
+/*
+ * Entry point routine: all calls go through this function
+ */
+static int
+palinfo_read_entry(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	int len=0;
+	pal_func_cpu_u_t *f = (pal_func_cpu_u_t *)&data;
+
+	/*
+	 * in SMP mode, we may need to call another CPU to get correct
+	 * information. PAL, by definition, is processor specific
+	 */
+	if (f->req_cpu == get_cpu())
+		len = (*palinfo_entries[f->func_id].proc_read)(page);
+	else
+		len = palinfo_handle_smp(f, page);
+
+	put_cpu();
+
+	if (len <= off+count) *eof = 1;
+
+	*start = page + off;
+	len   -= off;
+
+	if (len>count) len = count;
+	if (len<0) len = 0;
+
+	return len;
+}
+
+static void
+create_palinfo_proc_entries(unsigned int cpu)
+{
+#	define CPUSTR	"cpu%d"
+
+	pal_func_cpu_u_t f;
+	struct proc_dir_entry **pdir;
+	struct proc_dir_entry *cpu_dir;
+	int j;
+	char cpustr[sizeof(CPUSTR)];
+
+
+	/*
+	 * we keep track of created entries in a depth-first order for
+	 * cleanup purposes. Each entry is stored into palinfo_proc_entries
+	 */
+	sprintf(cpustr,CPUSTR, cpu);
+
+	cpu_dir = proc_mkdir(cpustr, palinfo_dir);
+
+	f.req_cpu = cpu;
+
+	/*
+	 * Compute the location to store per cpu entries
+	 * We dont store the top level entry in this list, but
+	 * remove it finally after removing all cpu entries.
+	 */
+	pdir = &palinfo_proc_entries[cpu*(NR_PALINFO_ENTRIES+1)];
+	*pdir++ = cpu_dir;
+	for (j=0; j < NR_PALINFO_ENTRIES; j++) {
+		f.func_id = j;
+		*pdir = create_proc_read_entry(
+				palinfo_entries[j].name, 0, cpu_dir,
+				palinfo_read_entry, (void *)f.value);
+		if (*pdir)
+			(*pdir)->owner = THIS_MODULE;
+		pdir++;
+	}
+}
+
+static void
+remove_palinfo_proc_entries(unsigned int hcpu)
+{
+	int j;
+	struct proc_dir_entry *cpu_dir, **pdir;
+
+	pdir = &palinfo_proc_entries[hcpu*(NR_PALINFO_ENTRIES+1)];
+	cpu_dir = *pdir;
+	*pdir++=NULL;
+	for (j=0; j < (NR_PALINFO_ENTRIES); j++) {
+		if ((*pdir)) {
+			remove_proc_entry ((*pdir)->name, cpu_dir);
+			*pdir ++= NULL;
+		}
+	}
+
+	if (cpu_dir) {
+		remove_proc_entry(cpu_dir->name, palinfo_dir);
+	}
+}
+
+static int __devinit palinfo_cpu_callback(struct notifier_block *nfb,
+								unsigned long action,
+								void *hcpu)
+{
+	unsigned int hotcpu = (unsigned long)hcpu;
+
+	switch (action) {
+	case CPU_ONLINE:
+		create_palinfo_proc_entries(hotcpu);
+		break;
+#ifdef CONFIG_HOTPLUG_CPU
+	case CPU_DEAD:
+		remove_palinfo_proc_entries(hotcpu);
+		break;
+#endif
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block palinfo_cpu_notifier =
+{
+	.notifier_call = palinfo_cpu_callback,
+	.priority = 0,
+};
+
+static int __init
+palinfo_init(void)
+{
+	int i = 0;
+
+	printk(KERN_INFO "PAL Information Facility v%s\n", PALINFO_VERSION);
+	palinfo_dir = proc_mkdir("pal", NULL);
+
+	/* Create palinfo dirs in /proc for all online cpus */
+	for_each_online_cpu(i) {
+		create_palinfo_proc_entries(i);
+	}
+
+	/* Register for future delivery via notify registration */
+	register_cpu_notifier(&palinfo_cpu_notifier);
+
+	return 0;
+}
+
+static void __exit
+palinfo_exit(void)
+{
+	int i = 0;
+
+	/* remove all nodes: depth first pass. Could optimize this  */
+	for_each_online_cpu(i) {
+		remove_palinfo_proc_entries(i);
+	}
+
+	/*
+	 * Remove the top level entry finally
+	 */
+	remove_proc_entry(palinfo_dir->name, NULL);
+
+	/*
+	 * Unregister from cpu notifier callbacks
+	 */
+	unregister_cpu_notifier(&palinfo_cpu_notifier);
+}
+
+module_init(palinfo_init);
+module_exit(palinfo_exit);