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-rw-r--r--arch/microblaze/kernel/cpu/cpuinfo.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
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index 000000000..d1dd6e83d
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -0,0 +1,131 @@
+/*
+ * 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/clk.h>
+#include <linux/init.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},
+ {"7.20.a", 0x0c},
+ {"7.20.b", 0x0d},
+ {"7.20.c", 0x0e},
+ {"7.20.d", 0x0f},
+ {"7.30.a", 0x10},
+ {"7.30.b", 0x11},
+ {"8.00.a", 0x12},
+ {"8.00.b", 0x13},
+ {"8.10.a", 0x14},
+ {"8.20.a", 0x15},
+ {"8.20.b", 0x16},
+ {"8.30.a", 0x17},
+ {"8.40.a", 0x18},
+ {"8.40.b", 0x19},
+ {"8.50.a", 0x1a},
+ {"8.50.b", 0x1c},
+ {"8.50.c", 0x1e},
+ {"9.0", 0x1b},
+ {"9.1", 0x1d},
+ {"9.2", 0x1f},
+ {"9.3", 0x20},
+ {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},
+ {"spartan6", 0xd},
+ {"virtex6", 0xe},
+ {"virtex7", 0xf},
+ /* FIXME There is no key code defined for spartan2 */
+ {"spartan2", 0xf0},
+ {"kintex7", 0x10},
+ {"artix7", 0x11},
+ {"zynq7000", 0x12},
+ {"UltraScale Virtex", 0x13},
+ {"UltraScale Kintex", 0x14},
+ {NULL, 0},
+};
+
+struct cpuinfo cpuinfo;
+static struct device_node *cpu;
+
+void __init setup_cpuinfo(void)
+{
+ cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
+ if (!cpu)
+ pr_err("You don't have cpu!!!\n");
+
+ pr_info("%s: initialising\n", __func__);
+
+ switch (cpu_has_pvr()) {
+ case 0:
+ pr_warn("%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 7.10.a
+ * please do not use FULL PVR with MMU */
+ case 1:
+ pr_info("%s: Using full CPU PVR support\n",
+ __func__);
+ set_cpuinfo_static(&cpuinfo, cpu);
+ set_cpuinfo_pvr_full(&cpuinfo, cpu);
+ break;
+ default:
+ pr_warn("%s: Unsupported PVR setting\n", __func__);
+ set_cpuinfo_static(&cpuinfo, cpu);
+ }
+
+ if (cpuinfo.mmu_privins)
+ pr_warn("%s: Stream instructions enabled"
+ " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
+}
+
+void __init setup_cpuinfo_clk(void)
+{
+ struct clk *clk;
+
+ clk = of_clk_get(cpu, 0);
+ if (IS_ERR(clk)) {
+ pr_err("ERROR: CPU CCF input clock not found\n");
+ /* take timebase-frequency from DTS */
+ cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
+ } else {
+ cpuinfo.cpu_clock_freq = clk_get_rate(clk);
+ }
+
+ if (!cpuinfo.cpu_clock_freq) {
+ pr_err("ERROR: CPU clock frequency not setup\n");
+ BUG();
+ }
+}