From 61a4e586d4ea3a05c656c094b62a1e550737086c Mon Sep 17 00:00:00 2001 From: Marius Strobl Date: Sun, 10 Apr 2016 22:43:36 +0000 Subject: Since r296250 it is no longer possible for devices to use bus space addresses exceeding 32 bit, so bump BUS_SPACE_MAXADDR to 64 bit. The whole situation is sub par, though; prior to r296250 and despite what their names imply, BUS_SPACE_MAX* were primarily, even almost exclusively used for bus_dma(9). Now these macros also have a vital role for bus_space(9). However, it does not necessarily hold that both bus DMA and space addresses universally have the same limits per platform. As for sparc64, 64 bit clearly is beyond what can be addressed via the various IOMMUs. With this change in place, we now rely on the parent bus DMA tags of the host-to-foo drivers causing the child tags to be capped as necessary. PR: 207998 --- sys/sparc64/include/bus.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/sparc64/include/bus.h b/sys/sparc64/include/bus.h index 9cdd20815972..6ff8c7ccd064 100644 --- a/sys/sparc64/include/bus.h +++ b/sys/sparc64/include/bus.h @@ -98,7 +98,7 @@ extern const int bus_stream_asi[]; #define BUS_SPACE_MAXSIZE 0xFFFFFFFFFFFFFFFF #define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF -#define BUS_SPACE_MAXADDR 0xFFFFFFFF +#define BUS_SPACE_MAXADDR 0xFFFFFFFFFFFFFFFF #define BUS_SPACE_UNRESTRICTED (~0) -- cgit v1.2.3