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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>
This commit is contained in:
Kumar Gala 2009-09-11 11:30:30 -05:00
parent d30f904353
commit 206af3527c
2 changed files with 15 additions and 15 deletions
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9
cpu/mpc85xx/tlb.c
View File

@ -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 ;

21
include/asm-ppc/mmu.h
View File

@ -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[];