From: Jiaxun Yang <[email protected]> Provide a generic platform with some common routines expected to be implemented at CPU level.
Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Yao Zi <[email protected]> --- Changed from v2 - Select CPU if DISPLAY_INFO is enabled - Reword the commit message, re-titled as "LoongArch: Generic platform type" - Fix the comment for cleanup_before_linux() to note that cache isn't disabled, captilize Linux - Drop unused DECLARE_GLOBAL_DATA_PTR from cpu/generic/dram.c No changes since v1 arch/loongarch/Kconfig | 1 + arch/loongarch/cpu/generic/Kconfig | 13 +++++++++++++ arch/loongarch/cpu/generic/Makefile | 7 +++++++ arch/loongarch/cpu/generic/cpu.c | 22 ++++++++++++++++++++++ arch/loongarch/cpu/generic/dram.c | 16 ++++++++++++++++ 5 files changed, 59 insertions(+) create mode 100644 arch/loongarch/cpu/generic/Kconfig create mode 100644 arch/loongarch/cpu/generic/Makefile create mode 100644 arch/loongarch/cpu/generic/cpu.c create mode 100644 arch/loongarch/cpu/generic/dram.c diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 5654de5a58c7..c5ef82b583b1 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -12,6 +12,7 @@ endchoice # board-specific options below # platform-specific options below +source "arch/loongarch/cpu/generic/Kconfig" # architecture-specific options below choice diff --git a/arch/loongarch/cpu/generic/Kconfig b/arch/loongarch/cpu/generic/Kconfig new file mode 100644 index 000000000000..5fcc2156906d --- /dev/null +++ b/arch/loongarch/cpu/generic/Kconfig @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2024 Jiaxun yang <[email protected]> +# + +config GENERIC_LOONGARCH + bool + select SYS_CACHE_SHIFT_6 + imply CPU + imply CPU_LOONGARCH + imply LOONGARCH_TIMER + imply CMD_CPU + select CPU if DISPLAY_CPUINFO diff --git a/arch/loongarch/cpu/generic/Makefile b/arch/loongarch/cpu/generic/Makefile new file mode 100644 index 000000000000..c98d63b4f831 --- /dev/null +++ b/arch/loongarch/cpu/generic/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2024 Jiaxun yang <[email protected]> +# + +obj-y += dram.o +obj-y += cpu.o diff --git a/arch/loongarch/cpu/generic/cpu.c b/arch/loongarch/cpu/generic/cpu.c new file mode 100644 index 000000000000..7eae927b0003 --- /dev/null +++ b/arch/loongarch/cpu/generic/cpu.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2024 Jiaxun Yang <[email protected]> + */ + +#include <irq_func.h> +#include <asm/cache.h> + +/* + * cleanup_before_linux() is called just before we call Linux, it prepares the + * processor for linux + * + * We disable interrupts and flush caches. + */ +int cleanup_before_linux(void) +{ + disable_interrupts(); + + cache_flush(); + + return 0; +} diff --git a/arch/loongarch/cpu/generic/dram.c b/arch/loongarch/cpu/generic/dram.c new file mode 100644 index 000000000000..26cabc4b3ccf --- /dev/null +++ b/arch/loongarch/cpu/generic/dram.c @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2024 Jiaxun Yang <[email protected]> + */ + +#include <fdtdec.h> + +int dram_init(void) +{ + return fdtdec_setup_mem_size_base_lowest(); +} + +int dram_init_banksize(void) +{ + return fdtdec_setup_memory_banksize(); +} -- 2.55.0
