mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
1da177e4c3
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!
468 lines
12 KiB
C
468 lines
12 KiB
C
/*
|
|
* 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/config.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/smp_lock.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);
|
|
}
|
|
|
|
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) && !defined(CONFIG_PPC64BRIDGE)
|
|
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;
|
|
}
|
|
|
|
#ifndef CONFIG_PPC64BRIDGE
|
|
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++;
|
|
}
|
|
#endif
|
|
|
|
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"
|
|
#ifndef CONFIG_PPC64BRIDGE
|
|
"User ptes\t: %u\n"
|
|
"Kernel ptes\t: %u\n"
|
|
"Percent full\t: %lu%%\n"
|
|
#endif
|
|
, (unsigned long)(Hash_size>>10),
|
|
(Hash_size/(sizeof(PTE)*8)),
|
|
(unsigned long)Hash,
|
|
Hash_size/sizeof(PTE)
|
|
#ifndef CONFIG_PPC64BRIDGE
|
|
, uptes,
|
|
kptes,
|
|
((kptes+uptes)*100) / (Hash_size/sizeof(PTE))
|
|
#endif
|
|
);
|
|
|
|
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[]={
|
|
{
|
|
.ctl_name = KERN_PPC_L2CR,
|
|
.procname = "l2cr",
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dol2crvec,
|
|
},
|
|
{ 0, },
|
|
};
|
|
static ctl_table htab_sysctl_root[] = {
|
|
{ 1, "kernel", NULL, 0, 0755, htab_ctl_table, },
|
|
{ 0,},
|
|
};
|
|
|
|
static int __init
|
|
register_ppc_htab_sysctl(void)
|
|
{
|
|
register_sysctl_table(htab_sysctl_root, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
__initcall(register_ppc_htab_sysctl);
|
|
#endif
|