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Diffstat (limited to 'arch/ppc/kernel/ppc_htab.c')
-rw-r--r--arch/ppc/kernel/ppc_htab.c464
1 files changed, 0 insertions, 464 deletions
diff --git a/arch/ppc/kernel/ppc_htab.c b/arch/ppc/kernel/ppc_htab.c
deleted file mode 100644
index 9ed36dd9cbf..00000000000
--- a/arch/ppc/kernel/ppc_htab.c
+++ /dev/null
@@ -1,464 +0,0 @@
-/*
- * PowerPC hash table management proc entry. Will show information
- * about the current hash table and will allow changes to it.
- *
- * Written by Cort Dougan (cort@cs.nmt.edu)
- *
- * 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.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/sysctl.h>
-#include <linux/capability.h>
-#include <linux/ctype.h>
-#include <linux/threads.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <asm/uaccess.h>
-#include <asm/mmu.h>
-#include <asm/residual.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/cputable.h>
-#include <asm/system.h>
-#include <asm/reg.h>
-
-static int ppc_htab_show(struct seq_file *m, void *v);
-static ssize_t ppc_htab_write(struct file * file, const char __user * buffer,
- size_t count, loff_t *ppos);
-extern PTE *Hash, *Hash_end;
-extern unsigned long Hash_size, Hash_mask;
-extern unsigned long _SDR1;
-extern unsigned long htab_reloads;
-extern unsigned long htab_preloads;
-extern unsigned long htab_evicts;
-extern unsigned long pte_misses;
-extern unsigned long pte_errors;
-extern unsigned int primary_pteg_full;
-extern unsigned int htab_hash_searches;
-
-static int ppc_htab_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ppc_htab_show, NULL);
-}
-
-const struct file_operations ppc_htab_operations = {
- .open = ppc_htab_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .write = ppc_htab_write,
- .release = single_release,
-};
-
-static char *pmc1_lookup(unsigned long mmcr0)
-{
- switch ( mmcr0 & (0x7f<<7) )
- {
- case 0x0:
- return "none";
- case MMCR0_PMC1_CYCLES:
- return "cycles";
- case MMCR0_PMC1_ICACHEMISS:
- return "ic miss";
- case MMCR0_PMC1_DTLB:
- return "dtlb miss";
- default:
- return "unknown";
- }
-}
-
-static char *pmc2_lookup(unsigned long mmcr0)
-{
- switch ( mmcr0 & 0x3f )
- {
- case 0x0:
- return "none";
- case MMCR0_PMC2_CYCLES:
- return "cycles";
- case MMCR0_PMC2_DCACHEMISS:
- return "dc miss";
- case MMCR0_PMC2_ITLB:
- return "itlb miss";
- case MMCR0_PMC2_LOADMISSTIME:
- return "load miss time";
- default:
- return "unknown";
- }
-}
-
-/*
- * print some useful info about the hash table. This function
- * is _REALLY_ slow (see the nested for loops below) but nothing
- * in here should be really timing critical. -- Cort
- */
-static int ppc_htab_show(struct seq_file *m, void *v)
-{
- unsigned long mmcr0 = 0, pmc1 = 0, pmc2 = 0;
-#if defined(CONFIG_PPC_STD_MMU)
- unsigned int kptes = 0, uptes = 0;
- PTE *ptr;
-#endif /* CONFIG_PPC_STD_MMU */
-
- if (cpu_has_feature(CPU_FTR_604_PERF_MON)) {
- mmcr0 = mfspr(SPRN_MMCR0);
- pmc1 = mfspr(SPRN_PMC1);
- pmc2 = mfspr(SPRN_PMC2);
- seq_printf(m,
- "604 Performance Monitoring\n"
- "MMCR0\t\t: %08lx %s%s ",
- mmcr0,
- ( mmcr0>>28 & 0x2 ) ? "(user mode counted)" : "",
- ( mmcr0>>28 & 0x4 ) ? "(kernel mode counted)" : "");
- seq_printf(m,
- "\nPMC1\t\t: %08lx (%s)\n"
- "PMC2\t\t: %08lx (%s)\n",
- pmc1, pmc1_lookup(mmcr0),
- pmc2, pmc2_lookup(mmcr0));
- }
-
-#ifdef CONFIG_PPC_STD_MMU
- /* if we don't have a htab */
- if ( Hash_size == 0 ) {
- seq_printf(m, "No Hash Table used\n");
- return 0;
- }
-
- for (ptr = Hash; ptr < Hash_end; ptr++) {
- unsigned int mctx, vsid;
-
- if (!ptr->v)
- continue;
- /* undo the esid skew */
- vsid = ptr->vsid;
- mctx = ((vsid - (vsid & 0xf) * 0x111) >> 4) & 0xfffff;
- if (mctx == 0)
- kptes++;
- else
- uptes++;
- }
-
- seq_printf(m,
- "PTE Hash Table Information\n"
- "Size\t\t: %luKb\n"
- "Buckets\t\t: %lu\n"
- "Address\t\t: %08lx\n"
- "Entries\t\t: %lu\n"
- "User ptes\t: %u\n"
- "Kernel ptes\t: %u\n"
- "Percent full\t: %lu%%\n"
- , (unsigned long)(Hash_size>>10),
- (Hash_size/(sizeof(PTE)*8)),
- (unsigned long)Hash,
- Hash_size/sizeof(PTE)
- , uptes,
- kptes,
- ((kptes+uptes)*100) / (Hash_size/sizeof(PTE))
- );
-
- seq_printf(m,
- "Reloads\t\t: %lu\n"
- "Preloads\t: %lu\n"
- "Searches\t: %u\n"
- "Overflows\t: %u\n"
- "Evicts\t\t: %lu\n",
- htab_reloads, htab_preloads, htab_hash_searches,
- primary_pteg_full, htab_evicts);
-#endif /* CONFIG_PPC_STD_MMU */
-
- seq_printf(m,
- "Non-error misses: %lu\n"
- "Error misses\t: %lu\n",
- pte_misses, pte_errors);
- return 0;
-}
-
-/*
- * Allow user to define performance counters and resize the hash table
- */
-static ssize_t ppc_htab_write(struct file * file, const char __user * ubuffer,
- size_t count, loff_t *ppos)
-{
-#ifdef CONFIG_PPC_STD_MMU
- unsigned long tmp;
- char buffer[16];
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (strncpy_from_user(buffer, ubuffer, 15))
- return -EFAULT;
- buffer[15] = 0;
-
- /* don't set the htab size for now */
- if ( !strncmp( buffer, "size ", 5) )
- return -EBUSY;
-
- if ( !strncmp( buffer, "reset", 5) )
- {
- if (cpu_has_feature(CPU_FTR_604_PERF_MON)) {
- /* reset PMC1 and PMC2 */
- mtspr(SPRN_PMC1, 0);
- mtspr(SPRN_PMC2, 0);
- }
- htab_reloads = 0;
- htab_evicts = 0;
- pte_misses = 0;
- pte_errors = 0;
- }
-
- /* Everything below here requires the performance monitor feature. */
- if (!cpu_has_feature(CPU_FTR_604_PERF_MON))
- return count;
-
- /* turn off performance monitoring */
- if ( !strncmp( buffer, "off", 3) )
- {
- mtspr(SPRN_MMCR0, 0);
- mtspr(SPRN_PMC1, 0);
- mtspr(SPRN_PMC2, 0);
- }
-
- if ( !strncmp( buffer, "user", 4) )
- {
- /* setup mmcr0 and clear the correct pmc */
- tmp = (mfspr(SPRN_MMCR0) & ~(0x60000000)) | 0x20000000;
- mtspr(SPRN_MMCR0, tmp);
- mtspr(SPRN_PMC1, 0);
- mtspr(SPRN_PMC2, 0);
- }
-
- if ( !strncmp( buffer, "kernel", 6) )
- {
- /* setup mmcr0 and clear the correct pmc */
- tmp = (mfspr(SPRN_MMCR0) & ~(0x60000000)) | 0x40000000;
- mtspr(SPRN_MMCR0, tmp);
- mtspr(SPRN_PMC1, 0);
- mtspr(SPRN_PMC2, 0);
- }
-
- /* PMC1 values */
- if ( !strncmp( buffer, "dtlb", 4) )
- {
- /* setup mmcr0 and clear the correct pmc */
- tmp = (mfspr(SPRN_MMCR0) & ~(0x7F << 7)) | MMCR0_PMC1_DTLB;
- mtspr(SPRN_MMCR0, tmp);
- mtspr(SPRN_PMC1, 0);
- }
-
- if ( !strncmp( buffer, "ic miss", 7) )
- {
- /* setup mmcr0 and clear the correct pmc */
- tmp = (mfspr(SPRN_MMCR0) & ~(0x7F<<7)) | MMCR0_PMC1_ICACHEMISS;
- mtspr(SPRN_MMCR0, tmp);
- mtspr(SPRN_PMC1, 0);
- }
-
- /* PMC2 values */
- if ( !strncmp( buffer, "load miss time", 14) )
- {
- /* setup mmcr0 and clear the correct pmc */
- asm volatile(
- "mfspr %0,%1\n\t" /* get current mccr0 */
- "rlwinm %0,%0,0,0,31-6\n\t" /* clear bits [26-31] */
- "ori %0,%0,%2 \n\t" /* or in mmcr0 settings */
- "mtspr %1,%0 \n\t" /* set new mccr0 */
- "mtspr %3,%4 \n\t" /* reset the pmc */
- : "=r" (tmp)
- : "i" (SPRN_MMCR0),
- "i" (MMCR0_PMC2_LOADMISSTIME),
- "i" (SPRN_PMC2), "r" (0) );
- }
-
- if ( !strncmp( buffer, "itlb", 4) )
- {
- /* setup mmcr0 and clear the correct pmc */
- asm volatile(
- "mfspr %0,%1\n\t" /* get current mccr0 */
- "rlwinm %0,%0,0,0,31-6\n\t" /* clear bits [26-31] */
- "ori %0,%0,%2 \n\t" /* or in mmcr0 settings */
- "mtspr %1,%0 \n\t" /* set new mccr0 */
- "mtspr %3,%4 \n\t" /* reset the pmc */
- : "=r" (tmp)
- : "i" (SPRN_MMCR0), "i" (MMCR0_PMC2_ITLB),
- "i" (SPRN_PMC2), "r" (0) );
- }
-
- if ( !strncmp( buffer, "dc miss", 7) )
- {
- /* setup mmcr0 and clear the correct pmc */
- asm volatile(
- "mfspr %0,%1\n\t" /* get current mccr0 */
- "rlwinm %0,%0,0,0,31-6\n\t" /* clear bits [26-31] */
- "ori %0,%0,%2 \n\t" /* or in mmcr0 settings */
- "mtspr %1,%0 \n\t" /* set new mccr0 */
- "mtspr %3,%4 \n\t" /* reset the pmc */
- : "=r" (tmp)
- : "i" (SPRN_MMCR0), "i" (MMCR0_PMC2_DCACHEMISS),
- "i" (SPRN_PMC2), "r" (0) );
- }
-
- return count;
-#else /* CONFIG_PPC_STD_MMU */
- return 0;
-#endif /* CONFIG_PPC_STD_MMU */
-}
-
-int proc_dol2crvec(ctl_table *table, int write, struct file *filp,
- void __user *buffer_arg, size_t *lenp, loff_t *ppos)
-{
- int vleft, first=1, len, left, val;
- char __user *buffer = (char __user *) buffer_arg;
- #define TMPBUFLEN 256
- char buf[TMPBUFLEN], *p;
- static const char *sizestrings[4] = {
- "2MB", "256KB", "512KB", "1MB"
- };
- static const char *clockstrings[8] = {
- "clock disabled", "+1 clock", "+1.5 clock", "reserved(3)",
- "+2 clock", "+2.5 clock", "+3 clock", "reserved(7)"
- };
- static const char *typestrings[4] = {
- "flow-through burst SRAM", "reserved SRAM",
- "pipelined burst SRAM", "pipelined late-write SRAM"
- };
- static const char *holdstrings[4] = {
- "0.5", "1.0", "(reserved2)", "(reserved3)"
- };
-
- if (!cpu_has_feature(CPU_FTR_L2CR))
- return -EFAULT;
-
- if ( /*!table->maxlen ||*/ (*ppos && !write)) {
- *lenp = 0;
- return 0;
- }
-
- vleft = table->maxlen / sizeof(int);
- left = *lenp;
-
- for (; left /*&& vleft--*/; first=0) {
- if (write) {
- while (left) {
- char c;
- if(get_user(c, buffer))
- return -EFAULT;
- if (!isspace(c))
- break;
- left--;
- buffer++;
- }
- if (!left)
- break;
- len = left;
- if (len > TMPBUFLEN-1)
- len = TMPBUFLEN-1;
- if(copy_from_user(buf, buffer, len))
- return -EFAULT;
- buf[len] = 0;
- p = buf;
- if (*p < '0' || *p > '9')
- break;
- val = simple_strtoul(p, &p, 0);
- len = p-buf;
- if ((len < left) && *p && !isspace(*p))
- break;
- buffer += len;
- left -= len;
- _set_L2CR(val);
- } else {
- p = buf;
- if (!first)
- *p++ = '\t';
- val = _get_L2CR();
- p += sprintf(p, "0x%08x: ", val);
- p += sprintf(p, " %s", (val >> 31) & 1 ? "enabled" :
- "disabled");
- p += sprintf(p, ", %sparity", (val>>30)&1 ? "" : "no ");
- p += sprintf(p, ", %s", sizestrings[(val >> 28) & 3]);
- p += sprintf(p, ", %s", clockstrings[(val >> 25) & 7]);
- p += sprintf(p, ", %s", typestrings[(val >> 23) & 2]);
- p += sprintf(p, "%s", (val>>22)&1 ? ", data only" : "");
- p += sprintf(p, "%s", (val>>20)&1 ? ", ZZ enabled": "");
- p += sprintf(p, ", %s", (val>>19)&1 ? "write-through" :
- "copy-back");
- p += sprintf(p, "%s", (val>>18)&1 ? ", testing" : "");
- p += sprintf(p, ", %sns hold",holdstrings[(val>>16)&3]);
- p += sprintf(p, "%s", (val>>15)&1 ? ", DLL slow" : "");
- p += sprintf(p, "%s", (val>>14)&1 ? ", diff clock" :"");
- p += sprintf(p, "%s", (val>>13)&1 ? ", DLL bypass" :"");
-
- p += sprintf(p,"\n");
-
- len = strlen(buf);
- if (len > left)
- len = left;
- if (copy_to_user(buffer, buf, len))
- return -EFAULT;
- left -= len;
- buffer += len;
- break;
- }
- }
-
- if (!write && !first && left) {
- if(put_user('\n', (char __user *) buffer))
- return -EFAULT;
- left--, buffer++;
- }
- if (write) {
- char __user *s = (char __user *) buffer;
- while (left) {
- char c;
- if(get_user(c, s++))
- return -EFAULT;
- if (!isspace(c))
- break;
- left--;
- }
- }
- if (write && first)
- return -EINVAL;
- *lenp -= left;
- *ppos += *lenp;
- return 0;
-}
-
-#ifdef CONFIG_SYSCTL
-/*
- * Register our sysctl.
- */
-static ctl_table htab_ctl_table[]={
- {
- .procname = "l2cr",
- .mode = 0644,
- .proc_handler = &proc_dol2crvec,
- },
- {}
-};
-static ctl_table htab_sysctl_root[] = {
- {
- .ctl_name = CTL_KERN,
- .procname = "kernel",
- .mode = 0555,
- .child = htab_ctl_table,
- },
- {}
-};
-
-static int __init
-register_ppc_htab_sysctl(void)
-{
- register_sysctl_table(htab_sysctl_root);
-
- return 0;
-}
-
-__initcall(register_ppc_htab_sysctl);
-#endif
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