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authorAlbert ARIBAUD <albert.u.boot@aribaud.net>2013-02-21 16:43:19 +0100
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2013-02-21 16:43:19 +0100
commit03268374db9133686b738acca212247023840ffc (patch)
treec511f6501522c2e8cf02edc85024aeb5042e792a /arch/arm/cpu/armv7
parent9f024f62e4604274a23213dcee30016092e32e7b (diff)
parent00ed34589880ca7092999ec5b92e061018d0fd0f (diff)
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Merge 'u-boot-microblaze/mainline/arm' into 'u-boot-arm/master'
This pulls the three following ZYNQ commits into ARM master: 7dca54f8: xilinx: zynq: Enable DCC and create new zynq_dcc board 59c651f4: arm: zynq: Add SLCR support with system reset 00ed3458: arm: zynq: Add lowlevel initialization to C
Diffstat (limited to 'arch/arm/cpu/armv7')
-rw-r--r--arch/arm/cpu/armv7/zynq/Makefile1
-rw-r--r--arch/arm/cpu/armv7/zynq/cpu.c28
-rw-r--r--arch/arm/cpu/armv7/zynq/slcr.c63
3 files changed, 91 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/zynq/Makefile b/arch/arm/cpu/armv7/zynq/Makefile
index 499ace4..388085d 100644
--- a/arch/arm/cpu/armv7/zynq/Makefile
+++ b/arch/arm/cpu/armv7/zynq/Makefile
@@ -30,6 +30,7 @@ LIB = $(obj)lib$(SOC).o
COBJS-y := timer.o
COBJS-y += cpu.o
+COBJS-y += slcr.o
COBJS := $(COBJS-y)
diff --git a/arch/arm/cpu/armv7/zynq/cpu.c b/arch/arm/cpu/armv7/zynq/cpu.c
index ab615cc..e8f4c19 100644
--- a/arch/arm/cpu/armv7/zynq/cpu.c
+++ b/arch/arm/cpu/armv7/zynq/cpu.c
@@ -21,11 +21,37 @@
* MA 02111-1307 USA
*/
#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/hardware.h>
-inline void lowlevel_init(void) {}
+void lowlevel_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);
+
+ /* 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);
+ /* TZ_DDR_RAM, Set DDR trust zone non-secure */
+ writel(0xFFFFFFFF, &slcr_base->trust_zone);
+ /* Set urgent bits with register */
+ writel(0x0, &slcr_base->ddr_urgent_sel);
+ /* Urgent write, ports S2/S3 */
+ writel(0xC, &slcr_base->ddr_urgent);
+
+ zynq_slcr_lock();
+}
void reset_cpu(ulong addr)
{
+ zynq_slcr_cpu_reset();
while (1)
;
}
diff --git a/arch/arm/cpu/armv7/zynq/slcr.c b/arch/arm/cpu/armv7/zynq/slcr.c
new file mode 100644
index 0000000..788a8fd
--- /dev/null
+++ b/arch/arm/cpu/armv7/zynq/slcr.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2013 Xilinx Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <asm/arch/hardware.h>
+
+#define SLCR_LOCK_MAGIC 0x767B
+#define SLCR_UNLOCK_MAGIC 0xDF0D
+
+static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
+
+void zynq_slcr_lock(void)
+{
+ if (!slcr_lock)
+ writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
+}
+
+void zynq_slcr_unlock(void)
+{
+ if (slcr_lock)
+ writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
+}
+
+/* Reset the entire system */
+void zynq_slcr_cpu_reset(void)
+{
+ /*
+ * Unlock the SLCR then reset the system.
+ * Note that this seems to require raw i/o
+ * functions or there's a lockup?
+ */
+ zynq_slcr_unlock();
+
+ /*
+ * Clear 0x0F000000 bits of reboot status register to workaround
+ * the FSBL not loading the bitstream after soft-reboot
+ * This is a temporary solution until we know more.
+ */
+ clrbits_le32(&slcr_base->reboot_status, 0xF000000);
+
+ writel(1, &slcr_base->pss_rst_ctrl);
+}