ppc/85xx: Repack tlb_table to save space

We can pack the initial tlb_table in MAS register format and use
write_tlb to set things up.  This savings can be helpful for NAND
style first stage boot loaders.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/cpu/mpc85xx/tlb.c b/cpu/mpc85xx/tlb.c
index d39712a5135f470b275d1b3ad8b47774d67fc68b..f87a10d4f40cf02da76068bcfd3ffe3726a9f9dd 100644 (file)
--- a/cpu/mpc85xx/tlb.c
+++ b/cpu/mpc85xx/tlb.c
@@ -90,10 +90,11 @@ void init_tlbs(void)
        int i;
 
        for (i = 0; i < num_tlb_entries; i++) {
-               set_tlb(tlb_table[i].tlb, tlb_table[i].epn, tlb_table[i].rpn,
-                       tlb_table[i].perms, tlb_table[i].wimge,
-                       tlb_table[i].ts, tlb_table[i].esel, tlb_table[i].tsize,
-                       tlb_table[i].iprot);
+               write_tlb(tlb_table[i].mas0,
+                         tlb_table[i].mas1,
+                         tlb_table[i].mas2,
+                         tlb_table[i].mas3,
+                         tlb_table[i].mas7);
        }
 
        return ;

diff --git a/include/asm-ppc/mmu.h b/include/asm-ppc/mmu.h
index 8f382fd6ff8a8936879f3031a7b5282926892a9b..a019d0b390bd8e1512968793517c55544df15402 100644 (file)
--- a/include/asm-ppc/mmu.h
+++ b/include/asm-ppc/mmu.h
@@ -485,19 +485,18 @@ extern unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg);
 extern void write_tlb(u32 _mas0, u32 _mas1, u32 _mas2, u32 _mas3, u32 _mas7);
 
 #define SET_TLB_ENTRY(_tlb, _epn, _rpn, _perms, _wimge, _ts, _esel, _sz, _iprot) \
-       { .tlb = _tlb, .epn = _epn, .rpn = _rpn, .perms = _perms, \
-         .wimge = _wimge, .ts = _ts, .esel = _esel, .tsize = _sz, .iprot = _iprot }
+       { .mas0 = FSL_BOOKE_MAS0(_tlb, _esel, 0), \
+         .mas1 = FSL_BOOKE_MAS1(1, _iprot, 0, _ts, _sz), \
+         .mas2 = FSL_BOOKE_MAS2(_epn, _wimge), \
+         .mas3 = FSL_BOOKE_MAS3(_rpn, 0, _perms), \
+         .mas7 = FSL_BOOKE_MAS7(_rpn), }
 
 struct fsl_e_tlb_entry {
-       u8      tlb;
-       u32     epn;
-       u64     rpn;
-       u8      perms;
-       u8      wimge;
-       u8      ts;
-       u8      esel;
-       u8      tsize;
-       u8      iprot;
+       u32     mas0;
+       u32     mas1;
+       u32     mas2;
+       u32     mas3;
+       u32     mas7;
 };
 
 extern struct fsl_e_tlb_entry tlb_table[];