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arm: zynq: Do not remap OCM to high address 

In case where ps-ddr is not used, do not remap
OCM to high address and keep it from 0x0.
Linux SMP requires to have memory at 0x0.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2013-08-28 08:26:41 +02:00
parent c0e5dd88c4
commit c1824ea268
1 changed files with 5 additions and 2 deletions
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7
arch/arm/cpu/armv7/zynq/cpu.c
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@ -16,13 +16,15 @@ void lowlevel_init(void)
int arch_cpu_init(void)
{
zynq_slcr_unlock();
/* remap DDR to zero, FILTERSTART */
writel(0, &scu_base->filter_start);
/* Device config APB, unlock the PCAP */
writel(0x757BDF0D, &devcfg_base->unlock);
writel(0xFFFFFFFF, &devcfg_base->rom_shadow);
#if (CONFIG_SYS_SDRAM_BASE == 0)
/* remap DDR to zero, FILTERSTART */
writel(0, &scu_base->filter_start);
/* OCM_CFG, Mask out the ROM, map ram into upper addresses */
writel(0x1F, &slcr_base->ocm_cfg);
/* FPGA_RST_CTRL, clear resets on AXI fabric ports */
@ -33,6 +35,7 @@ int arch_cpu_init(void)
writel(0x0, &slcr_base->ddr_urgent_sel);
/* Urgent write, ports S2/S3 */
writel(0xC, &slcr_base->ddr_urgent);
#endif
zynq_slcr_lock();