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parisc: Rewrite tlb flush threshold calculation 

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2020-10-02 21:28:31 +02:00 committed by Helge Deller
parent 53a42b6324
commit a50d3d3ce0
1 changed files with 8 additions and 10 deletions
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18
arch/parisc/kernel/cache.c
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@ -383,12 +383,12 @@ EXPORT_SYMBOL(flush_kernel_icache_range_asm);
static unsigned long parisc_cache_flush_threshold __ro_after_init = FLUSH_THRESHOLD;
#define FLUSH_TLB_THRESHOLD (16*1024) /* 16 KiB minimum TLB threshold */
static unsigned long parisc_tlb_flush_threshold __ro_after_init = FLUSH_TLB_THRESHOLD;
static unsigned long parisc_tlb_flush_threshold __ro_after_init = ~0UL;
void __init parisc_setup_cache_timing(void)
{
unsigned long rangetime, alltime;
unsigned long size, start;
unsigned long size;
unsigned long threshold;
alltime = mfctl(16);
@ -422,14 +422,9 @@ void __init parisc_setup_cache_timing(void)
goto set_tlb_threshold;
}
size = 0;
start = (unsigned long) _text;
size = (unsigned long)_end - (unsigned long)_text;
rangetime = mfctl(16);
while (start < (unsigned long) _end) {
flush_tlb_kernel_range(start, start + PAGE_SIZE);
start += PAGE_SIZE;
size += PAGE_SIZE;
}
flush_tlb_kernel_range((unsigned long)_text, (unsigned long)_end);
rangetime = mfctl(16) - rangetime;
alltime = mfctl(16);
@ -444,8 +439,11 @@ void __init parisc_setup_cache_timing(void)
threshold/1024);
set_tlb_threshold:
if (threshold > parisc_tlb_flush_threshold)
if (threshold > FLUSH_TLB_THRESHOLD)
parisc_tlb_flush_threshold = threshold;
else
parisc_tlb_flush_threshold = FLUSH_TLB_THRESHOLD;
printk(KERN_INFO "TLB flush threshold set to %lu KiB\n",
parisc_tlb_flush_threshold/1024);
}