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mpc85xx/tlb.c: Allow platforms to specify wimge bits

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Some platforms might want to override the default wimge=0 for
DDR.  Add CONFIG_SYS_PPC_DDR_WIMGE for those platforms to use.
This will initially only be used by TQM85xx, but could be
useful for other boards or testing going forward.  Note that
the name of this define is not 85xx-specific.  WIMGE is a
fairly universal concept, so any ppc platforms that require
different WIMGE settings for DDR can use the same #define.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Becky Bruce 2010-12-17 17:17:55 -06:00 committed by Kumar Gala
parent 5b297d1a42
commit 6b1ef2a6a5
1 changed files with 5 additions and 1 deletions
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6
arch/powerpc/cpu/mpc85xx/tlb.c
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@ -250,10 +250,14 @@ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg)
{
int i;
unsigned int tlb_size;
unsigned int wimge = 0;
unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
u64 size, memsize = (u64)memsize_in_meg << 20;
#ifdef CONFIG_SYS_PPC_DDR_WIMGE
wimge = CONFIG_SYS_PPC_DDR_WIMGE;
#endif
size = min(memsize, CONFIG_MAX_MEM_MAPPED);
/* Convert (4^max) kB to (2^max) bytes */
@ -277,7 +281,7 @@ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg)
tlb_size = (camsize - 10) / 2;
set_tlb(1, ram_tlb_address, p_addr,
MAS3_SX|MAS3_SW|MAS3_SR, 0,
MAS3_SX|MAS3_SW|MAS3_SR, wimge,
0, ram_tlb_index, tlb_size, 1);
size -= 1ULL << camsize;