From: Benjamin Herrenschmidt Date: Thu, 10 Nov 2005 03:54:58 +0000 (+1100) Subject: [PATCH] powerpc: 64k pages vs. U3 iommu X-Git-Tag: v2.6.15-rc1~51^2~8 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47c2ac8cc3cf7c484e131d10cb812b6ab198885a;p=linux-2.6 [PATCH] powerpc: 64k pages vs. U3 iommu That DART (U3 iommu) code didn't properly scale the number of entries when using !4k pages. That caused crashes when booting G5s with more than 2Gb of RAM. This fixes it. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/sysdev/u3_iommu.c b/arch/powerpc/sysdev/u3_iommu.c index 543d659098..f32baf7f46 100644 --- a/arch/powerpc/sysdev/u3_iommu.c +++ b/arch/powerpc/sysdev/u3_iommu.c @@ -226,7 +226,7 @@ static void iommu_table_u3_setup(void) iommu_table_u3.it_busno = 0; iommu_table_u3.it_offset = 0; /* it_size is in number of entries */ - iommu_table_u3.it_size = dart_tablesize / sizeof(u32); + iommu_table_u3.it_size = (dart_tablesize / sizeof(u32)) >> DART_PAGE_FACTOR; /* Initialize the common IOMMU code */ iommu_table_u3.it_base = (unsigned long)dart_vbase;