microblaze_v8: Cpuinfo handling

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 86 insertions, 0 deletions

diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
new file mode 100644
index 00000000000..4a740dfcf6d
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <asm/cpuinfo.h>
+#include <asm/pvr.h>
+
+const struct cpu_ver_key cpu_ver_lookup[] = {
+	/* These key value are as per MBV field in PVR0 */
+	{"5.00.a", 0x01},
+	{"5.00.b", 0x02},
+	{"5.00.c", 0x03},
+	{"6.00.a", 0x04},
+	{"6.00.b", 0x06},
+	{"7.00.a", 0x05},
+	{"7.00.b", 0x07},
+	{"7.10.a", 0x08},
+	{"7.10.b", 0x09},
+	{"7.10.c", 0x0a},
+	{"7.10.d", 0x0b},
+	/* FIXME There is no keycode defined in MBV for these versions */
+	{"2.10.a", 0x10},
+	{"3.00.a", 0x20},
+	{"4.00.a", 0x30},
+	{"4.00.b", 0x40},
+	{NULL, 0},
+};
+
+/*
+ * FIXME Not sure if the actual key is defined by Xilinx in the PVR
+ */
+const struct family_string_key family_string_lookup[] = {
+	{"virtex2", 0x4},
+	{"virtex2pro", 0x5},
+	{"spartan3", 0x6},
+	{"virtex4", 0x7},
+	{"virtex5", 0x8},
+	{"spartan3e", 0x9},
+	{"spartan3a", 0xa},
+	{"spartan3an", 0xb},
+	{"spartan3adsp", 0xc},
+	/* FIXME There is no key code defined for spartan2 */
+	{"spartan2", 0xf0},
+	{NULL, 0},
+};
+
+struct cpuinfo cpuinfo;
+
+void __init setup_cpuinfo(void)
+{
+	struct device_node *cpu = NULL;
+
+	cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
+	if (!cpu)
+		printk(KERN_ERR "You don't have cpu!!!\n");
+
+	printk(KERN_INFO "%s: initialising\n", __func__);
+
+	switch (cpu_has_pvr()) {
+	case 0:
+		printk(KERN_WARNING
+			"%s: No PVR support. Using static CPU info from FDT\n",
+			__func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+		break;
+/* FIXME I found weird behavior with MB 7.00.a/b
+ * please do not use FULL PVR with MMU */
+	case 1:
+		printk(KERN_INFO "%s: Using full CPU PVR support\n",
+			__func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+		set_cpuinfo_pvr_full(&cpuinfo, cpu);
+		break;
+	default:
+		printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+	}
+}