Hi Simon, > Some systems have more than 4GB of RAM. U-Boot can only place things > below 4GB so any memory above that should not be used. Ignore any > such memory so that the memory size will not exceed the maximum. > > This prevents gd->ram_size exceeding 4GB which causes problems for PCI > devices which use DMA. > > Signed-off-by: Simon Glass <s...@chromium.org> > Reviewed-by: Bin Meng <bmeng...@gmail.com> > --- > > Changes in v2: None > > arch/x86/cpu/coreboot/sdram.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/cpu/coreboot/sdram.c > b/arch/x86/cpu/coreboot/sdram.c index e98a230..9c3ab81 100644 > --- a/arch/x86/cpu/coreboot/sdram.c > +++ b/arch/x86/cpu/coreboot/sdram.c > @@ -90,7 +90,8 @@ int dram_init(void) > struct memrange *memrange = &lib_sysinfo.memrange[i]; > unsigned long long end = memrange->base + > memrange->size; > - if (memrange->type == CB_MEM_RAM && end > ram_size) > + if (memrange->type == CB_MEM_RAM && end > ram_size && > + memrange->base < (1ULL << 32)) > ram_size = end; > } > gd->ram_size = ram_size; > @@ -108,7 +109,8 @@ void dram_init_banksize(void) > for (i = 0, j = 0; i < lib_sysinfo.n_memranges; i++) > { struct memrange *memrange = &lib_sysinfo.memrange[i]; > > - if (memrange->type == CB_MEM_RAM) { > + if (memrange->type == CB_MEM_RAM && > + memrange->base < (1ULL << 32)) { > gd->bd->bi_dram[j].start = > memrange->base; gd->bd->bi_dram[j].size = memrange->size; > j++;
Reviewed-by: Lukasz Majewski <l.majew...@samsung.com> -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot