ARM:AM33XX: Added support for AM33xx

This patch adds basic support for AM33xx which is based on ARMV7
Cortex A8 CPU.

Signed-off-by: Chandan Nath <chandan.nath@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 130 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/am33xx/sys_info.c b/arch/arm/cpu/armv7/am33xx/sys_info.c
new file mode 100644
index 0000000..507b618
--- /dev/null
+++ b/arch/arm/cpu/armv7/am33xx/sys_info.c
@@ -0,0 +1,130 @@
+/*
+ * sys_info.c
+ *
+ * System information functions
+ *
+ * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
+ *
+ * Derived from Beagle Board and 3430 SDP code by
+ *      Richard Woodruff <r-woodruff2@ti.com>
+ *      Syed Mohammed Khasim <khasim@ti.com>
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+
+struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE;
+
+/**
+ * get_cpu_rev(void) - extract rev info
+ */
+u32 get_cpu_rev(void)
+{
+	u32 id;
+	u32 rev;
+
+	id = readl(DEVICE_ID);
+	rev = (id >> 28) & 0xff;
+
+	return rev;
+}
+
+/**
+ * get_cpu_type(void) - extract cpu info
+ */
+u32 get_cpu_type(void)
+{
+	u32 id = 0;
+	u32 partnum;
+
+	id = readl(DEVICE_ID);
+	partnum = (id >> 12) & 0xffff;
+
+	return partnum;
+}
+
+/**
+ * get_board_rev() - setup to pass kernel board revision information
+ * returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
+ */
+u32 get_board_rev(void)
+{
+	return BOARD_REV_ID;
+}
+
+/**
+ * get_device_type(): tell if GP/HS/EMU/TST
+ */
+u32 get_device_type(void)
+{
+	int mode;
+	mode = readl(&cstat->statusreg) & (DEVICE_MASK);
+	return mode >>= 8;
+}
+
+/**
+ * get_sysboot_value(void) - return SYS_BOOT[4:0]
+ */
+u32 get_sysboot_value(void)
+{
+	int mode;
+	mode = readl(&cstat->statusreg) & (SYSBOOT_MASK);
+	return mode;
+}
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+/**
+ * Print CPU information
+ */
+int print_cpuinfo(void)
+{
+	char *cpu_s, *sec_s;
+	int arm_freq, ddr_freq;
+
+	switch (get_cpu_type()) {
+	case AM335X:
+		cpu_s = "AM335X";
+		break;
+	default:
+		cpu_s = "Unknown cpu type";
+		break;
+	}
+
+	switch (get_device_type()) {
+	case TST_DEVICE:
+		sec_s = "TST";
+		break;
+	case EMU_DEVICE:
+		sec_s = "EMU";
+		break;
+	case HS_DEVICE:
+		sec_s = "HS";
+		break;
+	case GP_DEVICE:
+		sec_s = "GP";
+		break;
+	default:
+		sec_s = "?";
+	}
+
+	printf("AM%s-%s rev %d\n",
+			cpu_s, sec_s, get_cpu_rev());
+
+	/* TODO: Print ARM and DDR frequencies  */
+
+	return 0;
+}
+#endif	/* CONFIG_DISPLAY_CPUINFO */