From: Blue Swirl <blauwirbel@gmail.com>
Date: Sat, 3 Apr 2010 07:40:47 +0000 (+0000)
Subject: sparc32: add IOMMU chipset doc links
X-Git-Tag: v0.13.0-rc0~880
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=93c5a32f89c19a97badd0aa79d2ac2e44376b40e;p=thirdparty%2Fqemu.git

sparc32: add IOMMU chipset doc links

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
---

diff --git a/hw/sun4m_iommu.c b/hw/sun4m_iommu.c
index 0cd2ed00e37..1dbe0774661 100644
--- a/hw/sun4m_iommu.c
+++ b/hw/sun4m_iommu.c
@@ -1,5 +1,5 @@
 /*
- * QEMU SPARC iommu emulation
+ * QEMU Sun4m iommu emulation
  *
  * Copyright (c) 2003-2005 Fabrice Bellard
  *
@@ -35,6 +35,14 @@
 #define DPRINTF(fmt, ...)
 #endif
 
+/*
+ * I/O MMU used by Sun4m systems
+ *
+ * Chipset docs:
+ * "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01,
+ * http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf
+ */
+
 #define IOMMU_NREGS         (4*4096/4)
 #define IOMMU_CTRL          (0x0000 >> 2)
 #define IOMMU_CTRL_IMPL     0xf0000000 /* Implementation */