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+* Freescale QorIQ based Cache SRAM
+
+Freescale's QorIQ platforms provide an option of configuring
+a part of (or full) cache memory as SRAM. Any low level
+driver can use its APIs via selecting FSL_85XX_CACHE_SRAM as
+under for the case of gianfar ethernet driver:-
+
+In drivers/net/Kconfig:-
+
+config GIANFAR
+ ....
+ select FSL_85XX_CACHE_SRAM if MPC85xx
+ ....
+
+FSL_85XX_CACHE_SRAM and its base address are defined in
+arch/powerpc/sysdev/Kconfig as under:-
+
+config FSL_85XX_CACHE_SRAM
+ bool
+ select PPC_LIB_RHEAP
+
+config FSL_85XX_CACHE_SRAM_BASE
+ hex
+ depends on FSL_85XX_CACHE_SRAM
+ default "0xfff00000"
+
+The size of the above cache SRAM memory window is passed via the
+kernel command line as <cache-sram-size=....>
+
+Absence of the above parameter in the kernel command line is
+treated as no cache SRAM.
Adds documentation for Freescale's QorIQ based cache-sram as under:- * How to enable it from a low level driver * How to set its size Signed-off-by: Vivek Mahajan <vivek.mahajan@freescale.com> --- Documentation/powerpc/fsl_85xx_cache_sram.txt | 31 +++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) create mode 100644 Documentation/powerpc/fsl_85xx_cache_sram.txt