u-boot/arch/arm/cpu/armv7/zynq/cpu.c
Michal Simek d7e269cfbd zynq: Add support for U-BOOT SPL
SPL is using ps7_init.c/h files which are generated
from design tools which have to be copied to
boards/xilinx/zynq folder before compilation.

BSS section is moved to SDRAM because fat support
requires more space than SRAM size.

Added:
- MMC and QSPI support
- Boot OS directly from SPL
- Enable SPL command

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-02-19 09:41:22 +01:00

58 lines
1.2 KiB
C

/*
* Copyright (C) 2012 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2012 Xilinx, Inc. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clk.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware.h>
void lowlevel_init(void)
{
}
int arch_cpu_init(void)
{
zynq_slcr_unlock();
#ifndef CONFIG_SPL_BUILD
/* 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 */
writel(0x0, &slcr_base->fpga_rst_ctrl);
/* Set urgent bits with register */
writel(0x0, &slcr_base->ddr_urgent_sel);
/* Urgent write, ports S2/S3 */
writel(0xC, &slcr_base->ddr_urgent);
#endif
#endif
zynq_clk_early_init();
zynq_slcr_lock();
return 0;
}
void reset_cpu(ulong addr)
{
zynq_slcr_cpu_reset();
while (1)
;
}
#ifndef CONFIG_SYS_DCACHE_OFF
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
#endif