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author | york <yorksun@freescale.com> | 2010-07-02 22:25:53 +0000 |
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committer | Kumar Gala <galak@kernel.crashing.org> | 2010-07-26 13:16:09 -0500 |
commit | 5800e7ab32c200836e81ab2384817d93105561c5 (patch) | |
tree | a8022cbb490f4abbe4aba4480928abde59c70404 /arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c | |
parent | 076bff8f4746baf7c83b96049d97e9dd4454dace (diff) | |
download | u-boot-imx-5800e7ab32c200836e81ab2384817d93105561c5.zip u-boot-imx-5800e7ab32c200836e81ab2384817d93105561c5.tar.gz u-boot-imx-5800e7ab32c200836e81ab2384817d93105561c5.tar.bz2 |
powerpc/8xxx: Enable quad-rank DIMMs.
Previous code presumes each DIMM has up to two rank (chip select). Newer
DDR controller supports up to four chip select on one DIMM.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c')
-rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c index e888e3e..ce6c148 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c @@ -118,6 +118,18 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params, temp1++; continue; } + if (dimm_params[i].n_ranks == 4 && i != 0) { + printf("Found Quad-rank DIMM in wrong bank, ignored." + " Software may not run as expected.\n"); + temp1++; + continue; + } + if (dimm_params[i].n_ranks == 4 && \ + CONFIG_CHIP_SELECTS_PER_CTRL/CONFIG_DIMM_SLOTS_PER_CTLR < 4) { + printf("Found Quad-rank DIMM, not able to support."); + temp1++; + continue; + } /* * Find minimum tCKmax_ps to find fastest slow speed, |