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85xx: bugfix for reading maximum TLB size on mpc85xx

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The MAXSIZE field in the TLB1CFG register is 4 bits, not 8 bits.
This made setup_ddr_tlbs() try to set up a TLB larger than the e500 maximum
(256 MB)
which made u-boot hang in board_init_f() when trying to create a new stack
in RAM.
I have an mpc8540 with one 1GB dimm.

Signed-off-by: Fredrik Arnerup <fredrik.arnerup@edgeware.tv>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Fredrik Arnerup 2009-06-02 16:27:10 -05:00 committed by Wolfgang Denk
parent 1b5291dddf
commit 90d13b8ac3
1 changed files with 1 additions and 1 deletions
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2
cpu/mpc85xx/tlb.c
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@ -134,7 +134,7 @@ unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
unsigned int tlb_size;
unsigned int ram_tlb_index = CONFIG_SYS_DDR_TLB_START;
unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xff;
unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
u64 size, memsize = (u64)memsize_in_meg << 20;
size = min(memsize, CONFIG_MAX_MEM_MAPPED);