davinci: soc-specific SRAM setup
Package on-chip SRAM. It's always accessible from the ARM, so
set up a standardized virtual address mapping into a 128 KiB
area that's reserved for platform use.
In some cases (dm6467) the physical addresses used for EDMA are
not the same as the ones used by the ARM ... so record that info
separately in the SOC data, for chips (unlike the OMAP-L137)
where SRAM may be used with EDMA.
Other blocks of SRAM, such as the ETB buffer or DSP L1/L2 RAM,
may be unused/available on some system. They are ignored here.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 715528f..a1f03b6 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -66,10 +66,16 @@
unsigned gpio_irq;
struct platform_device *serial_dev;
struct emac_platform_data *emac_pdata;
+ dma_addr_t sram_dma;
+ unsigned sram_len;
};
extern struct davinci_soc_info davinci_soc_info;
extern void davinci_common_init(struct davinci_soc_info *soc_info);
+/* standard place to map on-chip SRAMs; they *may* support DMA */
+#define SRAM_VIRT 0xfffe0000
+#define SRAM_SIZE SZ_128K
+
#endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */