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ARC: mm: compute TLB size as needed from ways * sets 

This frees up some bits to hold more high level info such as PAE being
present, w/o increasing the size of already bloated cpuinfo struct

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
hifive-unleashed-5.1
Vineet Gupta 2015-10-02 12:25:35 +05:30
parent c583ee4fb0
commit b598e17f6a
2 changed files with 6 additions and 7 deletions
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4
arch/arc/include/asm/arcregs.h
View File

@ -327,8 +327,8 @@ struct bcr_generic {
*/
struct cpuinfo_arc_mmu {
unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, u_dtlb:6, u_itlb:6;
unsigned int num_tlb:16, sets:12, ways:4;
unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, pad:12;
unsigned int sets:12, ways:4, u_dtlb:8, u_itlb:8;
};
struct cpuinfo_arc_cache {

9
arch/arc/mm/tlb.c
View File

@ -240,9 +240,10 @@ static void tlb_entry_insert(unsigned int pd0, unsigned int pd1)
noinline void local_flush_tlb_all(void)
{
struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
unsigned long flags;
unsigned int entry;
struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
int num_tlb = mmu->sets * mmu->ways;
local_irq_save(flags);
@ -250,7 +251,7 @@ noinline void local_flush_tlb_all(void)
write_aux_reg(ARC_REG_TLBPD1, 0);
write_aux_reg(ARC_REG_TLBPD0, 0);
for (entry = 0; entry < mmu->num_tlb; entry++) {
for (entry = 0; entry < num_tlb; entry++) {
/* write this entry to the TLB */
write_aux_reg(ARC_REG_TLBINDEX, entry);
write_aux_reg(ARC_REG_TLBCOMMAND, TLBWrite);
@ -767,8 +768,6 @@ void read_decode_mmu_bcr(void)
mmu->u_dtlb = mmu4->u_dtlb * 4;
mmu->u_itlb = mmu4->u_itlb * 4;
}
mmu->num_tlb = mmu->sets * mmu->ways;
}
char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len)
@ -785,7 +784,7 @@ char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len)
n += scnprintf(buf + n, len - n,
"MMU [v%x]\t: %dk PAGE, %sJTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
p_mmu->ver, p_mmu->pg_sz_k, super_pg,
p_mmu->num_tlb, p_mmu->sets, p_mmu->ways,
p_mmu->sets * p_mmu->ways, p_mmu->sets, p_mmu->ways,
p_mmu->u_dtlb, p_mmu->u_itlb,
IS_ENABLED(CONFIG_ARC_MMU_SASID) ? ",SASID" : "");