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zynq: Add OF ram initialization support 

Read ram size directly from DTB.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-02-24 11:16:32 +01:00 committed by Tom Rini
parent 345d3c0f01
commit 9e0e37accd
1 changed files with 21 additions and 1 deletions
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22
board/xilinx/zynq/board.c
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@ -5,6 +5,7 @@
*/ */
#include <common.h> #include <common.h>
#include <fdtdec.h>
#include <netdev.h> #include <netdev.h>
#include <zynqpl.h> #include <zynqpl.h>
#include <asm/arch/hardware.h> #include <asm/arch/hardware.h>
@ -134,8 +135,27 @@ int board_mmc_init(bd_t *bd)
int dram_init(void) int dram_init(void)
{ {
gd->ram_size = CONFIG_SYS_SDRAM_SIZE; #ifdef CONFIG_OF_CONTROL
int node;
fdt_addr_t addr;
fdt_size_t size;
const void *blob = gd->fdt_blob;
node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
"memory", 7);
if (node == -FDT_ERR_NOTFOUND) {
debug("ZYNQ DRAM: Can't get memory node\n");
return -1;
}
addr = fdtdec_get_addr_size(blob, node, "reg", &size);
if (addr == FDT_ADDR_T_NONE || size == 0) {
debug("ZYNQ DRAM: Can't get base address or size\n");
return -1;
}
gd->ram_size = size;
#else
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
#endif
zynq_ddrc_init(); zynq_ddrc_init();
return 0; return 0;