Merge bk://bk.arm.linux.org.uk/linux-2.6-rmk

into ppc970.osdl.org:/home/torvalds/v2.6/linux

2 files changed, 106 insertions, 0 deletions

diff --git a/Documentation/arm/Sharp-LH/SDRAM b/Documentation/arm/Sharp-LH/SDRAM
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+README on the SDRAM Controller for the LH7a40X
+==============================================
+
+The standard configuration for the SDRAM controller generates a sparse
+memory array.  The precise layout is determined by the SDRAM chips.  A
+default kernel configuration assembles the discontiguous memory
+regions into separate memory nodes via the NUMA (Non-Uniform Memory
+Architecture) facilities.  In this default configuration, the kernel
+is forgiving about the precise layout.  As long as it is given an
+accurate picture of available memory by the bootloader the kernel will
+execute correctly.
+
+The SDRC supports a mode where some of the chip select lines are
+swapped in order to make SDRAM look like a synchronous ROM.  Setting
+this bit means that the RAM will present as a contiguous array.  Some
+programmers prefer this to the discontiguous layout.  Be aware that
+may be a penalty for this feature where some some configurations of
+memory are significantly reduced; i.e. 64MiB of RAM appears as only 32
+MiB.
+
+There are a couple of configuration options to override the default
+behavior.  When the SROMLL bit is set and memory appears as a
+contiguous array, there is no reason to support NUMA.
+CONFIG_LH7A40X_CONTIGMEM disables NUMA support.  When physical memory
+is discontiguous, the memory tables are organized such that there are
+two banks per nodes with a small gap between them.  This layout wastes
+some kernel memory for page tables representing non-existent memory.
+CONFIG_LH7A40X_ONE_BANK_PER_NODE optimizes the node tables such that
+there are no gaps.  These options control the low level organization
+of the memory management tables in ways that may prevent the kernel
+from booting or may cause the kernel to allocated excessively large
+page tables.  Be warned.  Only change these options if you know what
+you are doing.  The default behavior is a reasonable compromise that
+will suit all users.
+
+--
+
+A typical 32MiB system with the default configuration options will
+find physical memory managed as follows.
+
+   node 0: 0xc0000000 4MiB
+           0xc1000000 4MiB
+   node 1: 0xc4000000 4MiB
+           0xc5000000 4MiB
+   node 2: 0xc8000000 4MiB
+           0xc9000000 4MiB
+   node 3: 0xcc000000 4MiB
+           0xcd000000 4MiB
+
+Setting CONFIG_LH7A40X_ONE_BANK_PER_NODE will put each bank into a
+separate node.
diff --git a/Documentation/arm/VFP/release-notes.txt b/Documentation/arm/VFP/release-notes.txt
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+Release notes for Linux Kernel VFP support code
+-----------------------------------------------
+
+Date: 	20 May 2004
+Author:	Russell King
+
+This is the first release of the Linux Kernel VFP support code.  It
+provides support for the exceptions bounced from VFP hardware found
+on ARM926EJ-S.
+
+This release has been validated against the SoftFloat-2b library by
+John R. Hauser using the TestFloat-2a test suite.  Details of this
+library and test suite can be found at:
+
+   http://www.cs.berkeley.edu/~jhauser/arithmetic/SoftFloat.html
+
+The operations which have been tested with this package are:
+
+ - fdiv
+ - fsub
+ - fadd
+ - fmul
+ - fcmp
+ - fcmpe
+ - fcvtd
+ - fcvts
+ - fsito
+ - ftosi
+ - fsqrt
+
+All the above pass softfloat tests with the following exceptions:
+
+- fadd/fsub shows some differences in the handling of +0 / -0 results
+  when input operands differ in signs.
+- the handling of underflow exceptions is slightly different.  If a
+  result underflows before rounding, but becomes a normalised number
+  after rounding, we do not signal an underflow exception.
+
+Other operations which have been tested by basic assembly-only tests
+are:
+
+ - fcpy
+ - fabs
+ - fneg
+ - ftoui
+ - ftosiz
+ - ftouiz
+
+The combination operations have not been tested:
+
+ - fmac
+ - fnmac
+ - fmsc
+ - fnmsc
+ - fnmul