1 files changed, 114 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h
new file mode 100644
index 00000000000..86d2c8a034d
--- /dev/null
+++ b/arch/microblaze/include/asm/cpuinfo.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022, Ovidiu Panait <ovpanait@gmail.com>
+ */
+
+#ifndef __ASM_MICROBLAZE_CPUINFO_H
+#define __ASM_MICROBLAZE_CPUINFO_H
+
+/**
+ * struct microblaze_cpuinfo - CPU info for microblaze processor core.
+ *
+ * @icache_size: Size of instruction cache memory in bytes.
+ * @icache_line_length: Instruction cache line length in bytes.
+ * @dcache_size: Size of data cache memory in bytes.
+ * @dcache_line_length: Data cache line length in bytes.
+ * @use_mmu: MMU support flag.
+ * @cpu_freq: Cpu clock frequency in Hz.
+ * @addr_size: Address bus width in bits.
+ * @ver_code: Cpu version code.
+ * @fpga_code: FPGA family version code.
+ */
+struct microblaze_cpuinfo {
+	u32 icache_size;
+	u32 icache_line_length;
+
+	u32 dcache_size;
+	u32 dcache_line_length;
+
+#if CONFIG_IS_ENABLED(CPU_MICROBLAZE)
+	u32 use_mmu;
+	u32 cpu_freq;
+	u32 addr_size;
+
+	u32 ver_code;
+	u32 fpga_code;
+#endif /* CONFIG_CPU_MICROBLAZE */
+};
+
+/**
+ * struct microblaze_version_data - Maps a hex version code to a cpu/fpga name.
+ */
+struct microblaze_version_map {
+	const char *string;
+	const u32 code;
+};
+
+/**
+ * microblaze_lookup_cpu_version_code() - Get hex version code for the
+ * specified cpu name string.
+ *
+ * This function searches the cpu_ver_lookup[] array for the hex version code
+ * associated with a specific CPU name. The version code is returned if a match
+ * is found, otherwise 0.
+ *
+ * @string: cpu name string
+ *
+ * Return: >0 if the entry is found, 0 otherwise.
+ */
+const u32 microblaze_lookup_cpu_version_code(const char *string);
+
+/**
+ * microblaze_lookup_fpga_family_code() - Get hex version code for the
+ * specified fpga family name.
+ *
+ * This function searches the family_string_lookup[] array for the hex version
+ * code associated with a specific fpga family name. The version code is
+ * returned if a match is found, otherwise 0.
+ *
+ * @string: fpga family name string
+ *
+ * Return: >0 if the entry is found, 0 otherwise.
+ */
+const u32 microblaze_lookup_fpga_family_code(const char *string);
+
+/**
+ * microblaze_lookup_cpu_version_string() - Get cpu name for the specified cpu
+ * version code.
+ *
+ * This function searches the cpu_ver_lookup[] array for the cpu name string
+ * associated with a specific version code. The cpu name is returned if a match
+ * is found, otherwise "(unknown)".
+ *
+ * @code: cpu version code
+ *
+ * Return: Pointer to the cpu name if the entry is found, otherwise "(unknown)".
+ */
+const char *microblaze_lookup_cpu_version_string(const u32 code);
+
+/**
+ * microblaze_lookup_fpga_family_string() - Get fpga family name for the
+ * specified version code.
+ *
+ * This function searches the family_string_lookup[] array for the fpga family
+ * name string associated with a specific version code. The fpga family name is
+ * returned if a match is found, otherwise "(unknown)".
+ *
+ * @code: fpga family version code
+ *
+ * Return: Pointer to the fpga family name if the entry is found, otherwise
+ * "(unknown)".
+ */
+const char *microblaze_lookup_fpga_family_string(const u32 code);
+
+/**
+ * microblaze_early_cpuinfo_init() - Initialize cpuinfo with default values.
+ *
+ * Initializes the global data cpuinfo structure with default values (cache
+ * size, cache line size, etc.). It is called very early in the boot process
+ * (start.S codepath right before the first cache flush call) to ensure that
+ * cache related operations are properly handled.
+ */
+void microblaze_early_cpuinfo_init(void);
+
+#endif	/* __ASM_MICROBLAZE_CPUINFO_H */