diff options
author | Ovidiu Panait <ovpanait@gmail.com> | 2022-05-31 21:14:31 +0300 |
---|---|---|
committer | Michal Simek <michal.simek@amd.com> | 2022-06-24 15:16:00 +0300 |
commit | 95b7a8fd128aec8214d13b33131a4ea1fa4cc9a3 (patch) | |
tree | b3686f51bf152049642c884e67f912e8d6a47f21 /arch/microblaze/include | |
parent | b195134984ec714f92632704e4725ced170ab1da (diff) | |
download | u-boot-95b7a8fd128aec8214d13b33131a4ea1fa4cc9a3.tar.xz |
microblaze: cache: introduce cpuinfo structure
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/)
Diffstat (limited to 'arch/microblaze/include')
-rw-r--r-- | arch/microblaze/include/asm/cpuinfo.h | 35 | ||||
-rw-r--r-- | arch/microblaze/include/asm/global_data.h | 5 |
2 files changed, 40 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h new file mode 100644 index 0000000000..c27dd40af7 --- /dev/null +++ b/arch/microblaze/include/asm/cpuinfo.h @@ -0,0 +1,35 @@ +/* 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. + */ +struct microblaze_cpuinfo { + u32 icache_size; + u32 icache_line_length; + + u32 dcache_size; + u32 dcache_line_length; +}; + +/** + * 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 */ diff --git a/arch/microblaze/include/asm/global_data.h b/arch/microblaze/include/asm/global_data.h index 05868ac4f5..93506dec89 100644 --- a/arch/microblaze/include/asm/global_data.h +++ b/arch/microblaze/include/asm/global_data.h @@ -8,12 +8,17 @@ #ifndef __ASM_GBL_DATA_H #define __ASM_GBL_DATA_H +#include <asm/cpuinfo.h> + /* Architecture-specific global data */ struct arch_global_data { + struct microblaze_cpuinfo cpuinfo; }; #include <asm-generic/global_data.h> #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r31") +#define gd_cpuinfo() ((struct microblaze_cpuinfo *)&gd->arch.cpuinfo) + #endif /* __ASM_GBL_DATA_H */ |