ARM: Add Support for Marvell Pantheon Familiy SoCs

Pantheon Family processors are highly integrated SoCs
based on Sheeva_88SV331x-v5 PJ1 cpu core.
Ref:
http://www.marvell.com/products/processors/communications/marvell_pantheon_910_920_pb.pdf

SoC versions Supported:
1) PANTHEON920          (TD)
2) PANTHEON910          (TTC)

Signed-off-by: Lei Wen <leiwen@marvell.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/arch/arm/cpu/arm926ejs/pantheon/cpu.c b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
new file mode 100644
index 0000000000..9ddc77c071
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2011
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Lei Wen <leiwen@marvell.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/arch/pantheon.h>
+#include <asm/io.h>
+
+#define UARTCLK14745KHZ	(APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(1))
+#define SET_MRVL_ID	(1<<8)
+#define L2C_RAM_SEL	(1<<4)
+
+int arch_cpu_init(void)
+{
+	u32 val;
+	struct panthcpu_registers *cpuregs =
+		(struct panthcpu_registers*) PANTHEON_CPU_BASE;
+
+	struct panthapb_registers *apbclkres =
+		(struct panthapb_registers*) PANTHEON_APBC_BASE;
+
+	struct panthmpmu_registers *mpmu =
+		(struct panthmpmu_registers*) PANTHEON_MPMU_BASE;
+
+	/* set SEL_MRVL_ID bit in PANTHEON_CPU_CONF register */
+	val = readl(&cpuregs->cpu_conf);
+	val = val | SET_MRVL_ID;
+	writel(val, &cpuregs->cpu_conf);
+
+	/* Turn on clock gating (PMUM_CCGR) */
+	writel(0xFFFFFFFF, &mpmu->ccgr);
+
+	/* Turn on clock gating (PMUM_ACGR) */
+	writel(0xFFFFFFFF, &mpmu->acgr);
+
+	/* Turn on uart2 clock */
+	writel(UARTCLK14745KHZ, &apbclkres->uart0);
+
+	/* Enable GPIO clock */
+	writel(APBC_APBCLK, &apbclkres->gpio);
+
+	icache_enable();
+
+	return 0;
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+	u32 id;
+	struct panthcpu_registers *cpuregs =
+		(struct panthcpu_registers*) PANTHEON_CPU_BASE;
+
+	id = readl(&cpuregs->chip_id);
+	printf("SoC:   PANTHEON 88AP%X-%X\n", (id & 0xFFF), (id >> 0x10));
+	return 0;
+}
+#endif