static void
get_max_cacheline_size (void)
{
unsigned long line_size, max = 1;
u64 l, levels, unique_caches;
pal_cache_config_info_t cci;
s64 status;
status = ia64_pal_cache_summary(&levels, &unique_caches);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
__FUNCTION__, status);
max = SMP_CACHE_BYTES;
goto out;
}
for (l = 0; l < levels; ++l) {
status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
&cci);
if (status != 0) {
printk(KERN_ERR
"%s: ia64_pal_cache_config_info(l=%lu) failed (status=%ld)\n",
__FUNCTION__, l, status);
max = SMP_CACHE_BYTES;
}
line_size = 1 << cci.pcci_line_size;
if (line_size > max)
max = line_size;
}
out:
if (max > ia64_max_cacheline_size)
ia64_max_cacheline_size = max;
}
/**
* pci_cacheline_size - determine cacheline size for PCI devices
* @dev: void
*
* We want to use the line-size of the outer-most cache. We assume
* that this line-size is the same for all CPUs.
*
* Code mostly taken from arch/ia64/kernel/palinfo.c:cache_info().
*
* RETURNS: An appropriate -ERRNO error value on eror, or zero for success.
*/
static unsigned long
pci_cacheline_size (void)
{
u64 levels, unique_caches;
s64 status;
pal_cache_config_info_t cci;
static u8 cacheline_size;
if (cacheline_size)
return cacheline_size;
status = ia64_pal_cache_summary(&levels, &unique_caches);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
__FUNCTION__, status);
return SMP_CACHE_BYTES;
}
status = ia64_pal_cache_config_info(levels - 1, /* cache_type (data_or_unified)= */ 2,
&cci);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed (status=%ld)\n",
__FUNCTION__, status);
return SMP_CACHE_BYTES;
}
cacheline_size = 1 << cci.pcci_line_size;
return cacheline_size;
}
/*
* Calculate the max. cache line size.
*
* In addition, the minimum of the i-cache stride sizes is calculated for
* "flush_icache_range()".
*/
static void __cpuinit
get_max_cacheline_size (void)
{
unsigned long line_size, max = 1;
unsigned int cache_size = 0;
u64 l, levels, unique_caches;
pal_cache_config_info_t cci;
s64 status;
status = ia64_pal_cache_summary(&levels, &unique_caches);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
__FUNCTION__, status);
max = SMP_CACHE_BYTES;
/* Safest setup for "flush_icache_range()" */
ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
goto out;
}
for (l = 0; l < levels; ++l) {
status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
&cci);
if (status != 0) {
printk(KERN_ERR
"%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n",
__FUNCTION__, l, status);
max = SMP_CACHE_BYTES;
/* The safest setup for "flush_icache_range()" */
cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
cci.pcci_unified = 1;
}
line_size = 1 << cci.pcci_line_size;
if (line_size > max)
max = line_size;
if (cache_size < cci.pcci_cache_size)
cache_size = cci.pcci_cache_size;
if (!cci.pcci_unified) {
status = ia64_pal_cache_config_info(l,
/* cache_type (instruction)= */ 1,
&cci);
if (status != 0) {
printk(KERN_ERR
"%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n",
__FUNCTION__, l, status);
/* The safest setup for "flush_icache_range()" */
cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
}
}
if (cci.pcci_stride < ia64_i_cache_stride_shift)
ia64_i_cache_stride_shift = cci.pcci_stride;
}
out:
#ifdef CONFIG_SMP
max_cache_size = max(max_cache_size, cache_size);
#endif
if (max > ia64_max_cacheline_size)
ia64_max_cacheline_size = max;
}
/**
* set_pci_cacheline_size - determine cacheline size for PCI devices
*
* We want to use the line-size of the outer-most cache. We assume
* that this line-size is the same for all CPUs.
*
* Code mostly taken from arch/ia64/kernel/palinfo.c:cache_info().
*/
static void __init set_pci_cacheline_size(void)
{
u64 levels, unique_caches;
s64 status;
pal_cache_config_info_t cci;
status = ia64_pal_cache_summary(&levels, &unique_caches);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_summary() failed "
"(status=%ld)\n", __func__, status);
return;
}
status = ia64_pal_cache_config_info(levels - 1,
/* cache_type (data_or_unified)= */ 2, &cci);
if (status != 0) {
printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed "
"(status=%ld)\n", __func__, status);
return;
}
pci_cache_line_size = (1 << cci.pcci_line_size) / 4;
}
static int
cache_info(char *page)
{
char *p = page;
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;
}
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 : %u 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;
}