ARC: compress cpuinfo_arc_mmu (mainly save page size in KB)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index e2b1b12..56e2f1f 100644 (file)
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -299,7 +299,8 @@ struct bcr_generic {
  */
 
 struct cpuinfo_arc_mmu {
-       unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb;
+       unsigned int ver:4, pg_sz_k:8, pad:8, u_dtlb:6, u_itlb:6;
+       unsigned int num_tlb:16, sets:12, ways:4;
 };
 
 struct cpuinfo_arc_cache {

diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c
index 7f47d2a..914d8e0 100644 (file)
--- a/arch/arc/mm/tlb.c
+++ b/arch/arc/mm/tlb.c
@@ -587,14 +587,14 @@ void read_decode_mmu_bcr(void)
 
        if (mmu->ver <= 2) {
                mmu2 = (struct bcr_mmu_1_2 *)&tmp;
-               mmu->pg_sz = PAGE_SIZE;
+               mmu->pg_sz_k = TO_KB(PAGE_SIZE);
                mmu->sets = 1 << mmu2->sets;
                mmu->ways = 1 << mmu2->ways;
                mmu->u_dtlb = mmu2->u_dtlb;
                mmu->u_itlb = mmu2->u_itlb;
        } else {
                mmu3 = (struct bcr_mmu_3 *)&tmp;
-               mmu->pg_sz = 512 << mmu3->pg_sz;
+               mmu->pg_sz_k = 1 << (mmu3->pg_sz - 1);
                mmu->sets = 1 << mmu3->sets;
                mmu->ways = 1 << mmu3->ways;
                mmu->u_dtlb = mmu3->u_dtlb;
@@ -611,7 +611,7 @@ char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len)
 
        n += scnprintf(buf + n, len - n,
                      "MMU [v%x]\t: %dk PAGE, JTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
-                      p_mmu->ver, TO_KB(p_mmu->pg_sz),
+                      p_mmu->ver, p_mmu->pg_sz_k,
                       p_mmu->num_tlb, p_mmu->sets, p_mmu->ways,
                       p_mmu->u_dtlb, p_mmu->u_itlb,
                       IS_ENABLED(CONFIG_ARC_MMU_SASID) ? ",SASID" : "");
@@ -639,7 +639,7 @@ void arc_mmu_init(void)
                      mmu->ver, CONFIG_ARC_MMU_VER);
        }
 
-       if (mmu->pg_sz != PAGE_SIZE)
+       if (mmu->pg_sz_k != TO_KB(PAGE_SIZE))
                panic("MMU pg size != PAGE_SIZE (%luk)\n", TO_KB(PAGE_SIZE));
 
        /* Enable the MMU */