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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-04-30 17:35:48 -0700
committerKevin Hilman <khilman@deeprootsystems.com>2009-05-28 15:18:12 -0700
commit0d04eb47054f685b23033ed6ceadfb20db77c5b3 (patch)
tree3a3de44b01ac71a80f970ddf80f8d1ca28c3e2f6 /arch/arm/mach-davinci/dm644x.c
parentb79dbdefd2be0980c58b5e36fdc23eb14a7caab4 (diff)
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>
Diffstat (limited to 'arch/arm/mach-davinci/dm644x.c')
-rw-r--r--arch/arm/mach-davinci/dm644x.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 4ab5f07ead0..fb5449b3c97 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -539,6 +539,13 @@ static struct map_desc dm644x_io_desc[] = {
.length = IO_SIZE,
.type = MT_DEVICE
},
+ {
+ .virtual = SRAM_VIRT,
+ .pfn = __phys_to_pfn(0x00008000),
+ .length = SZ_16K,
+ /* MT_MEMORY_NONCACHED requires supersection alignment */
+ .type = MT_DEVICE,
+ },
};
/* Contents of JTAG ID register used to identify exact cpu type */
@@ -629,6 +636,8 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
.gpio_irq = IRQ_GPIOBNK0,
.serial_dev = &dm644x_serial_device,
.emac_pdata = &dm644x_emac_pdata,
+ .sram_dma = 0x00008000,
+ .sram_len = SZ_16K,
};
void __init dm644x_init(void)