From: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org, ralf@linux-mips.org,
linux-kernel@vger.kernel.org
Cc: David Daney <ddaney@caviumnetworks.com>
Subject: [PATCH 3/9] MIPS: Octeon: Adjust top of DMA32 zone.
Date: Thu, 23 Sep 2010 15:38:10 -0700 [thread overview]
Message-ID: <1285281496-24696-4-git-send-email-ddaney@caviumnetworks.com> (raw)
In-Reply-To: <1285281496-24696-1-git-send-email-ddaney@caviumnetworks.com>
On OCTEON, we reserve the last 256MB of 32-bit PCI address space,
mapping the RAM in this region at a high DMA address. This makes
memory in this region unavailable for 32-bit DMA.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
---
.../asm/mach-cavium-octeon/cpu-feature-overrides.h | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
index b952fc7..c84ed74 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
@@ -81,4 +81,10 @@ static inline int octeon_has_saa(void)
return id >= 0x000d0300;
}
+/*
+ * The last 256MB are reserved for device to device mappings and the
+ * BAR1 hole.
+ */
+#define MAX_DMA32_PFN (((1ULL << 32) - (1ULL << 28)) >> PAGE_SHIFT)
+
#endif
--
1.7.2.2
next prev parent reply other threads:[~2010-09-23 22:39 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 22:38 [PATCH 0/9] MIPS: Use dma-mapping-common.h and use swiotlb for Octeon David Daney
2010-09-23 22:38 ` [PATCH 1/9] MIPS: Octeon: Set dma_masks for octeon_mgmt device David Daney
2010-09-23 22:38 ` [PATCH 2/9] MIPS: Allow MAX_DMA32_PFN to be overridden David Daney
2010-09-23 22:38 ` David Daney [this message]
2010-09-23 22:38 ` [PATCH 4/9] MIPS: Octeon: Select ZONE_DMA32 David Daney
2010-09-23 22:38 ` [PATCH 5/9] MIPS: Convert DMA to use dma-mapping-common.h David Daney
2010-09-24 1:03 ` [PATCH] MIPS: Remove plat_map_dma_mem_page() David Daney
2010-09-27 5:30 ` [PATCH 5/9] MIPS: Convert DMA to use dma-mapping-common.h FUJITA Tomonori
2010-09-27 17:35 ` David Daney
2010-09-28 0:12 ` FUJITA Tomonori
2010-09-23 22:38 ` [PATCH 8/9] MIPS: Add a platform hook for swiotlb setup David Daney
2010-09-24 16:08 ` Sergei Shtylyov
2010-09-24 16:13 ` David Daney
2010-09-24 16:32 ` Ralf Baechle
2010-09-23 22:38 ` [PATCH 9/9] MIPS: Octeon: Rewrite DMA mapping functions David Daney
2010-09-24 1:06 ` [PATCH] MIPS: Octeon: Remove plat_map_dma_mem_page() David Daney
2010-09-23 22:47 ` [PATCH 6/9] swiotlb: Declare swiotlb_init_with_default_size() David Daney
2010-09-27 16:53 ` Konrad Rzeszutek Wilk
2010-09-23 22:47 ` [PATCH 7/9] swiotlb: Make bounce buffer bounds non-static David Daney
2010-09-27 5:20 ` FUJITA Tomonori
2010-09-27 17:39 ` David Daney
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