diff options
| -rw-r--r-- | arch/arm/mach-uniphier/dram_init.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/dram_init.c b/arch/arm/mach-uniphier/dram_init.c index e9672d2f1bc..cb35dabfece 100644 --- a/arch/arm/mach-uniphier/dram_init.c +++ b/arch/arm/mach-uniphier/dram_init.c @@ -205,6 +205,7 @@ int dram_init(void) return ret; for (i = 0; i < ARRAY_SIZE(dram_map); i++) { + unsigned long max_size; if (!dram_map[i].size) break; @@ -218,6 +219,22 @@ int dram_init(void) dram_map[i].base) break; + /* + * Do not use memory that exceeds 32bit address range. U-Boot + * relocates itself to the end of the effectively available RAM. + * This could be a problem for DMA engines that do not support + * 64bit address (SDMA of SDHCI, UniPhier AV-ether, etc.) + */ + if (dram_map[i].base >= 1ULL << 32) + break; + + max_size = (1ULL << 32) - dram_map[i].base; + + if (dram_map[i].size > max_size) { + gd->ram_size += max_size; + break; + } + gd->ram_size += dram_map[i].size; } |