95b7a8fd12
Introduce a minimal cpuinfo structure to hold cache related info. The instruction/data cache size and cache line size are initialized early in the boot to default Kconfig values. They will be overwritten with data from PVR/dtb if the microblaze UCLASS_CPU driver is enabled. The cpuinfo struct was placed in global_data to allow the microblaze UCLASS_CPU driver to also run before relocation (initialized global data should be read-only before relocation). gd_cpuinfo() helper macro was added to avoid volatile "-Wdiscarded-qualifiers" warnings when using the pointer directly. Signed-off-by: Ovidiu Panait <ovpanait@gmail.com> Link: https://lore.kernel.org/r/20220531181435.3473549-10-ovpanait@gmail.com Signed-off-by: Michal Simek <michal.simek@amd.com> (s/bralid/brlid/)
36 lines
1.0 KiB
C
36 lines
1.0 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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*/
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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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};
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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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