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-rw-r--r--arch/ia64/kernel/palinfo.c942
1 files changed, 942 insertions, 0 deletions
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
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+++ b/arch/ia64/kernel/palinfo.c
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+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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
+ * 10/26/2006 Russ Anderson updated processor features to rev 2.2 spec
+ */
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.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)(struct seq_file *);
+
+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 const 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
+ * Output:
+ * - a pointer to the end of the buffer
+ *
+ */
+static void bitvector_process(struct seq_file *m, u64 vector)
+{
+ int i,j;
+ static const char *units[]={ "", "K", "M", "G", "T" };
+
+ for (i=0, j=0; i < 64; i++ , j=i/10) {
+ if (vector & 0x1)
+ seq_printf(m, "%d%s ", 1 << (i-j*10), units[j]);
+ vector >>= 1;
+ }
+}
+
+/*
+ * 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 void bitregister_process(struct seq_file *m, 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)
+ seq_printf(m, "%d-%d ", begin, i-1);
+ else
+ seq_printf(m, "%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)
+ seq_printf(m, "%d-127", begin);
+ else
+ seq_puts(m, "127");
+ }
+}
+
+static int power_info(struct seq_file *m)
+{
+ s64 status;
+ 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) {
+ seq_printf(m,
+ "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 {
+ seq_printf(m,"Power level %d: not implemented\n", i);
+ }
+ }
+ return 0;
+}
+
+static int cache_info(struct seq_file *m)
+{
+ unsigned long i, levels, unique_caches;
+ pal_cache_config_info_t cci;
+ int j, k;
+ long status;
+
+ if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
+ printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
+ return 0;
+ }
+
+ seq_printf(m, "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;
+
+ seq_printf(m,
+ "%s Cache level %lu:\n"
+ "\tSize : %u bytes\n"
+ "\tAttributes : ",
+ cache_types[j+cci.pcci_unified], i+1,
+ cci.pcci_cache_size);
+
+ if (cci.pcci_unified)
+ seq_puts(m, "Unified ");
+
+ seq_printf(m, "%s\n", cache_mattrib[cci.pcci_cache_attr]);
+
+ seq_printf(m,
+ "\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)
+ seq_puts(m, "\tStore latency : N/A\n");
+ else
+ seq_printf(m, "\tStore latency : %d cycle(s)\n",
+ cci.pcci_st_latency);
+
+ seq_printf(m,
+ "\tLoad latency : %d cycle(s)\n"
+ "\tStore hints : ", cci.pcci_ld_latency);
+
+ for(k=0; k < 8; k++ ) {
+ if ( cci.pcci_st_hints & 0x1)
+ seq_printf(m, "[%s]", cache_st_hints[k]);
+ cci.pcci_st_hints >>=1;
+ }
+ seq_puts(m, "\n\tLoad hints : ");
+
+ for(k=0; k < 8; k++ ) {
+ if (cci.pcci_ld_hints & 0x1)
+ seq_printf(m, "[%s]", cache_ld_hints[k]);
+ cci.pcci_ld_hints >>=1;
+ }
+ seq_printf(m,
+ "\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 0;
+}
+
+
+static int vm_info(struct seq_file *m)
+{
+ 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;
+ long status;
+
+ if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
+ printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
+ } else {
+
+ seq_printf(m,
+ "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"
+ "Max Purges : ",
+ 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 (vm_info_2.pal_vm_info_2_s.max_purges == PAL_MAX_PURGES)
+ seq_puts(m, "unlimited\n");
+ else
+ seq_printf(m, "%d\n",
+ vm_info_2.pal_vm_info_2_s.max_purges ?
+ vm_info_2.pal_vm_info_2_s.max_purges : 1);
+ }
+
+ if (ia64_pal_mem_attrib(&attrib) == 0) {
+ seq_puts(m, "Supported memory attributes : ");
+ sep = "";
+ for (i = 0; i < 8; i++) {
+ if (attrib & (1 << i)) {
+ seq_printf(m, "%s%s", sep, mem_attrib[i]);
+ sep = ", ";
+ }
+ }
+ seq_putc(m, '\n');
+ }
+
+ if ((status = ia64_pal_vm_page_size(&tr_pages, &vw_pages)) !=0) {
+ printk(KERN_ERR "ia64_pal_vm_page_size=%ld\n", status);
+ } else {
+
+ seq_printf(m,
+ "\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);
+
+ bitvector_process(m, tr_pages);
+
+ seq_puts(m, "\nTLB purgeable page sizes : ");
+
+ bitvector_process(m, vw_pages);
+ }
+
+ if ((status = ia64_get_ptce(&ptce)) != 0) {
+ printk(KERN_ERR "ia64_get_ptce=%ld\n", status);
+ } else {
+ seq_printf(m,
+ "\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]);
+
+ seq_printf(m,
+ "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;
+
+ seq_printf(m,
+ "\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)
+ seq_puts(m, "PreferredPageSizeOptimized ");
+ if (tc_info.tc_unified)
+ seq_puts(m, "Unified ");
+ if (tc_info.tc_reduce_tr)
+ seq_puts(m, "TCReduction");
+
+ seq_puts(m, "\n\tSupported page sizes: ");
+
+ bitvector_process(m, tc_pages);
+
+ /* when unified date (j=2) is enough */
+ if (tc_info.tc_unified)
+ break;
+ }
+ }
+ }
+
+ seq_putc(m, '\n');
+ return 0;
+}
+
+
+static int register_info(struct seq_file *m)
+{
+ u64 reg_info[2];
+ u64 info;
+ unsigned long phys_stacked;
+ pal_hints_u_t hints;
+ unsigned long iregs, dregs;
+ static const char * const 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;
+ seq_printf(m, "%-32s : ", info_type[info]);
+ bitregister_process(m, reg_info, 128);
+ seq_putc(m, '\n');
+ }
+
+ if (ia64_pal_rse_info(&phys_stacked, &hints) == 0)
+ seq_printf(m,
+ "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;
+
+ seq_printf(m,
+ "Instruction debug register pairs : %ld\n"
+ "Data debug register pairs : %ld\n", iregs, dregs);
+
+ return 0;
+}
+
+static const char *const proc_features_0[]={ /* Feature set 0 */
+ 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,
+ "Unimplemented instruction address fault",
+ "INIT, PMI, and LINT pins",
+ "Simple unimplemented instr addresses",
+ "Variable P-state performance",
+ "Virtual machine features implemented",
+ "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,
+ "Disable P-states",
+ "Enable MCA on Data Poisoning",
+ "Enable vmsw instruction",
+ "Enable extern environmental notification",
+ "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 const char *const proc_features_16[]={ /* Feature set 16 */
+ "Disable ETM",
+ "Enable ETM",
+ "Enable MCA on half-way timer",
+ "Enable snoop WC",
+ NULL,
+ "Enable Fast Deferral",
+ "Disable MCA on memory aliasing",
+ "Enable RSB",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "DP system processor",
+ "Low Voltage",
+ "HT supported",
+ 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, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL
+};
+
+static const char *const *const proc_features[]={
+ proc_features_0,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ proc_features_16,
+ NULL, NULL, NULL, NULL,
+};
+
+static void feature_set_info(struct seq_file *m, u64 avail, u64 status, u64 control,
+ unsigned long set)
+{
+ const char *const *vf, *const *v;
+ int i;
+
+ vf = v = proc_features[set];
+ for(i=0; i < 64; i++, avail >>=1, status >>=1, control >>=1) {
+
+ if (!(control)) /* No remaining bits set */
+ break;
+ if (!(avail & 0x1)) /* Print only bits that are available */
+ continue;
+ if (vf)
+ v = vf + i;
+ if ( v && *v ) {
+ seq_printf(m, "%-40s : %s %s\n", *v,
+ avail & 0x1 ? (status & 0x1 ?
+ "On " : "Off"): "",
+ avail & 0x1 ? (control & 0x1 ?
+ "Ctrl" : "NoCtrl"): "");
+ } else {
+ seq_printf(m, "Feature set %2ld bit %2d\t\t\t"
+ " : %s %s\n",
+ set, i,
+ avail & 0x1 ? (status & 0x1 ?
+ "On " : "Off"): "",
+ avail & 0x1 ? (control & 0x1 ?
+ "Ctrl" : "NoCtrl"): "");
+ }
+ }
+}
+
+static int processor_info(struct seq_file *m)
+{
+ u64 avail=1, status=1, control=1, feature_set=0;
+ s64 ret;
+
+ do {
+ ret = ia64_pal_proc_get_features(&avail, &status, &control,
+ feature_set);
+ if (ret < 0)
+ return 0;
+
+ if (ret == 1) {
+ feature_set++;
+ continue;
+ }
+
+ feature_set_info(m, avail, status, control, feature_set);
+ feature_set++;
+ } while(1);
+
+ return 0;
+}
+
+static const char *const 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(struct seq_file *m)
+{
+ const char *const *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;
+ seq_printf(m, "%-48s : %s%s %s\n", *v,
+ avail & 0x1 ? "" : "NotImpl",
+ avail & 0x1 ? (status & 0x1 ? "On" : "Off"): "",
+ avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
+ }
+ return 0;
+}
+
+static int version_info(struct seq_file *m)
+{
+ pal_version_u_t min_ver, cur_ver;
+
+ if (ia64_pal_version(&min_ver, &cur_ver) != 0)
+ return 0;
+
+ seq_printf(m,
+ "PAL_vendor : 0x%02x (min=0x%02x)\n"
+ "PAL_A : %02x.%02x (min=%02x.%02x)\n"
+ "PAL_B : %02x.%02x (min=%02x.%02x)\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,
+ cur_ver.pal_version_s.pv_pal_a_rev,
+ min_ver.pal_version_s.pv_pal_a_model,
+ min_ver.pal_version_s.pv_pal_a_rev,
+ cur_ver.pal_version_s.pv_pal_b_model,
+ cur_ver.pal_version_s.pv_pal_b_rev,
+ min_ver.pal_version_s.pv_pal_b_model,
+ min_ver.pal_version_s.pv_pal_b_rev);
+ return 0;
+}
+
+static int frequency_info(struct seq_file *m)
+{
+ struct pal_freq_ratio proc, itc, bus;
+ unsigned long base;
+
+ if (ia64_pal_freq_base(&base) == -1)
+ seq_puts(m, "Output clock : not implemented\n");
+ else
+ seq_printf(m, "Output clock : %ld ticks/s\n", base);
+
+ if (ia64_pal_freq_ratios(&proc, &bus, &itc) != 0) return 0;
+
+ seq_printf(m,
+ "Processor/Clock ratio : %d/%d\n"
+ "Bus/Clock ratio : %d/%d\n"
+ "ITC/Clock ratio : %d/%d\n",
+ proc.num, proc.den, bus.num, bus.den, itc.num, itc.den);
+ return 0;
+}
+
+static int tr_info(struct seq_file *m)
+{
+ long 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;
+ unsigned long i, j;
+ unsigned long max[3], pgm;
+ struct ifa_reg {
+ unsigned long valid:1;
+ unsigned long ig:11;
+ unsigned long vpn:52;
+ } *ifa_reg;
+ struct itir_reg {
+ unsigned long rv1:2;
+ unsigned long ps:6;
+ unsigned long key:24;
+ unsigned long rv2:32;
+ } *itir_reg;
+ struct gr_reg {
+ unsigned long p:1;
+ unsigned long rv1:1;
+ unsigned long ma:3;
+ unsigned long a:1;
+ unsigned long d:1;
+ unsigned long pl:2;
+ unsigned long ar:3;
+ unsigned long ppn:38;
+ unsigned long rv2:2;
+ unsigned long ed:1;
+ unsigned long ig:11;
+ } *gr_reg;
+ struct rid_reg {
+ unsigned long ig1:1;
+ unsigned long rv1:1;
+ unsigned long ig2:6;
+ unsigned long rid:24;
+ unsigned long 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);
+ seq_printf(m,
+ "%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);
+
+ bitvector_process(m, 1<< itir_reg->ps);
+
+ seq_printf(m,
+ "\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 0;
+}
+
+
+
+/*
+ * List {name,function} pairs for every entry in /proc/palinfo/cpu*
+ */
+static const 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, },
+ { "frequency_info", frequency_info, },
+ { "bus_info", bus_info },
+ { "tr_info", tr_info, }
+};
+
+#define NR_PALINFO_ENTRIES (int) ARRAY_SIZE(palinfo_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 */
+ struct seq_file *m; /* 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;
+ data->ret = (*data->func)(data->m);
+}
+
+/*
+ * 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(struct seq_file *m, pal_func_cpu_u_t *f)
+{
+ palinfo_smp_data_t ptr;
+ int ret;
+
+ ptr.func = palinfo_entries[f->func_id].proc_read;
+ ptr.m = m;
+ 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, 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(struct seq_file *m, pal_func_cpu_u_t *f)
+{
+ 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 proc_palinfo_show(struct seq_file *m, void *v)
+{
+ pal_func_cpu_u_t *f = (pal_func_cpu_u_t *)&m->private;
+
+ /*
+ * 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())
+ (*palinfo_entries[f->func_id].proc_read)(m);
+ else
+ palinfo_handle_smp(m, f);
+
+ put_cpu();
+ return 0;
+}
+
+static int palinfo_add_proc(unsigned int cpu)
+{
+ pal_func_cpu_u_t f;
+ struct proc_dir_entry *cpu_dir;
+ int j;
+ char cpustr[3+4+1]; /* cpu numbers are up to 4095 on itanic */
+ sprintf(cpustr, "cpu%d", cpu);
+
+ cpu_dir = proc_mkdir(cpustr, palinfo_dir);
+ if (!cpu_dir)
+ return -EINVAL;
+
+ f.req_cpu = cpu;
+
+ for (j=0; j < NR_PALINFO_ENTRIES; j++) {
+ f.func_id = j;
+ proc_create_single_data(palinfo_entries[j].name, 0, cpu_dir,
+ proc_palinfo_show, (void *)f.value);
+ }
+ return 0;
+}
+
+static int palinfo_del_proc(unsigned int hcpu)
+{
+ char cpustr[3+4+1]; /* cpu numbers are up to 4095 on itanic */
+
+ sprintf(cpustr, "cpu%d", hcpu);
+ remove_proc_subtree(cpustr, palinfo_dir);
+ return 0;
+}
+
+static enum cpuhp_state hp_online;
+
+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);
+ if (!palinfo_dir)
+ return -ENOMEM;
+
+ i = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/palinfo:online",
+ palinfo_add_proc, palinfo_del_proc);
+ if (i < 0) {
+ remove_proc_subtree("pal", NULL);
+ return i;
+ }
+ hp_online = i;
+ return 0;
+}
+
+static void __exit palinfo_exit(void)
+{
+ cpuhp_remove_state(hp_online);
+ remove_proc_subtree("pal", NULL);
+}
+
+module_init(palinfo_init);
+module_exit(palinfo_exit);