From e80cc28c1d61c79314e83fee08fc3e82d7452335 Mon Sep 17 00:00:00 2001 From: John Baldwin Date: Wed, 7 Mar 2012 18:57:09 +0000 Subject: [PATCH] Remove the PAE-specific 2GB DMA boundary since HEAD now supports a proper 4G boundary for PAE. --- sys/dev/pci/pci.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index 0874e4b0bf77..e1b7bc08d898 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -70,20 +70,9 @@ __FBSDID("$FreeBSD$"); #include "pcib_if.h" #include "pci_if.h" -/* - * XXX: Due to a limitation of the bus_dma_tag_create() API, we cannot - * specify a 4GB boundary on 32-bit targets. Usually this does not - * matter as it is ok to use a boundary of 0 on these systems. - * However, in the case of PAE, DMA addresses can cross a 4GB - * boundary, so as a workaround use a 2GB boundary. - */ #if (BUS_SPACE_MAXADDR > 0xFFFFFFFF) -#ifdef PAE -#define PCI_DMA_BOUNDARY 0x80000000 -#else #define PCI_DMA_BOUNDARY 0x100000000 #endif -#endif #define PCIR_IS_BIOS(cfg, reg) \ (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \