cpu: add CPU driver for microblaze
Add a basic CPU driver that retrieves information about the microblaze CPU
core. cpu_ops handlers are implemented so that the "cpu" command can work
properly:
U-Boot-mONStR> cpu list
0: cpu@0 MicroBlaze @ 50MHz, Rev: 11.0, FPGA family: zynq7000
U-Boot-mONStR> cpu detail
0: cpu@0 MicroBlaze @ 50MHz, Rev: 11.0, FPGA family: zynq7000
ID = 0, freq = 50 MHz: L1 cache, MMU
Note: cpu_ver_lookup[] and family_string_lookup[] arrays were imported from
linux.
Signed-off-by: Ovidiu Panait <ovpanait@gmail.com>
Link: https://lore.kernel.org/r/20220531181435.3473549-14-ovpanait@gmail.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h
index c27dd40..86d2c8a 100644
--- a/arch/microblaze/include/asm/cpuinfo.h
+++ b/arch/microblaze/include/asm/cpuinfo.h
@@ -13,6 +13,11 @@
* @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;
@@ -20,9 +25,83 @@
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