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https://github.com/AsahiLinux/u-boot
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816226d27e
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>
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2022, Ovidiu Panait <ovpanait@gmail.com>
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*/
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#ifndef __ASM_MICROBLAZE_CPUINFO_H
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#define __ASM_MICROBLAZE_CPUINFO_H
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/**
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* struct microblaze_cpuinfo - CPU info for microblaze processor core.
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*
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* @icache_size: Size of instruction cache memory in bytes.
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* @icache_line_length: Instruction cache line length in bytes.
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* @dcache_size: Size of data cache memory in bytes.
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* @dcache_line_length: Data cache line length in bytes.
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* @use_mmu: MMU support flag.
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* @cpu_freq: Cpu clock frequency in Hz.
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* @addr_size: Address bus width in bits.
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* @ver_code: Cpu version code.
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* @fpga_code: FPGA family version code.
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*/
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struct microblaze_cpuinfo {
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u32 icache_size;
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u32 icache_line_length;
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u32 dcache_size;
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u32 dcache_line_length;
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#if CONFIG_IS_ENABLED(CPU_MICROBLAZE)
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u32 use_mmu;
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u32 cpu_freq;
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u32 addr_size;
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u32 ver_code;
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u32 fpga_code;
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#endif /* CONFIG_CPU_MICROBLAZE */
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};
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/**
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* struct microblaze_version_data - Maps a hex version code to a cpu/fpga name.
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*/
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struct microblaze_version_map {
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const char *string;
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const u32 code;
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};
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/**
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* microblaze_lookup_cpu_version_code() - Get hex version code for the
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* specified cpu name string.
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*
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* This function searches the cpu_ver_lookup[] array for the hex version code
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* associated with a specific CPU name. The version code is returned if a match
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* is found, otherwise 0.
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*
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* @string: cpu name string
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*
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* Return: >0 if the entry is found, 0 otherwise.
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*/
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const u32 microblaze_lookup_cpu_version_code(const char *string);
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/**
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* microblaze_lookup_fpga_family_code() - Get hex version code for the
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* specified fpga family name.
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*
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* This function searches the family_string_lookup[] array for the hex version
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* code associated with a specific fpga family name. The version code is
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* returned if a match is found, otherwise 0.
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*
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* @string: fpga family name string
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*
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* Return: >0 if the entry is found, 0 otherwise.
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*/
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const u32 microblaze_lookup_fpga_family_code(const char *string);
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/**
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* microblaze_lookup_cpu_version_string() - Get cpu name for the specified cpu
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* version code.
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*
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* This function searches the cpu_ver_lookup[] array for the cpu name string
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* associated with a specific version code. The cpu name is returned if a match
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* is found, otherwise "(unknown)".
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*
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* @code: cpu version code
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*
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* Return: Pointer to the cpu name if the entry is found, otherwise "(unknown)".
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*/
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const char *microblaze_lookup_cpu_version_string(const u32 code);
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/**
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* microblaze_lookup_fpga_family_string() - Get fpga family name for the
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* specified version code.
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*
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* This function searches the family_string_lookup[] array for the fpga family
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* name string associated with a specific version code. The fpga family name is
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* returned if a match is found, otherwise "(unknown)".
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*
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* @code: fpga family version code
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*
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* Return: Pointer to the fpga family name if the entry is found, otherwise
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* "(unknown)".
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*/
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const char *microblaze_lookup_fpga_family_string(const u32 code);
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/**
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* microblaze_early_cpuinfo_init() - Initialize cpuinfo with default values.
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*
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* Initializes the global data cpuinfo structure with default values (cache
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* size, cache line size, etc.). It is called very early in the boot process
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* (start.S codepath right before the first cache flush call) to ensure that
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* cache related operations are properly handled.
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*/
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void microblaze_early_cpuinfo_init(void);
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#endif /* __ASM_MICROBLAZE_CPUINFO_H */
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