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Message-ID: <20240906114151.519028-4-jvetter@kalrayinc.com> Date: Fri, 6 Sep 2024 13:41:50 +0200 From: Julian Vetter <jvetter@...rayinc.com> To: Arnd Bergmann <arnd@...db.de>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>, Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>, Andrew Morton <akpm@...ux-foundation.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-csky@...r.kernel.org, loongarch@...ts.linux.dev, Yann Sionneau <ysionneau@...rayinc.com>, Julian Vetter <jvetter@...rayinc.com> Subject: [PATCH 3/4] Activate GENERIC_IO for the csky architecture Use the generic __memcpy_{from,to}io and __memset_io for the csky processor architecture. Reviewed-by: Yann Sionneau <ysionneau@...rayinc.com> Signed-off-by: Julian Vetter <jvetter@...rayinc.com> --- arch/csky/Kconfig | 1 + arch/csky/kernel/Makefile | 2 +- arch/csky/kernel/io.c | 91 --------------------------------------- 3 files changed, 2 insertions(+), 92 deletions(-) delete mode 100644 arch/csky/kernel/io.c diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 5479707eb5d1..d64329b691f7 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -48,6 +48,7 @@ config CSKY select DMA_DIRECT_REMAP select IRQ_DOMAIN select DW_APB_TIMER_OF + select GENERIC_IO select GENERIC_IOREMAP select GENERIC_LIB_ASHLDI3 select GENERIC_LIB_ASHRDI3 diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile index 8a868316b912..de1c3472e8f0 100644 --- a/arch/csky/kernel/Makefile +++ b/arch/csky/kernel/Makefile @@ -2,7 +2,7 @@ extra-y := vmlinux.lds obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/ -obj-y += power.o syscall.o syscall_table.o setup.o io.o +obj-y += power.o syscall.o syscall_table.o setup.o obj-y += process.o cpu-probe.o ptrace.o stacktrace.o obj-y += probes/ diff --git a/arch/csky/kernel/io.c b/arch/csky/kernel/io.c deleted file mode 100644 index 5883f13fa2b1..000000000000 --- a/arch/csky/kernel/io.c +++ /dev/null @@ -1,91 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -#include <linux/export.h> -#include <linux/types.h> -#include <linux/io.h> - -/* - * Copy data from IO memory space to "real" memory space. - */ -void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) -{ - while (count && !IS_ALIGNED((unsigned long)from, 4)) { - *(u8 *)to = __raw_readb(from); - from++; - to++; - count--; - } - - while (count >= 4) { - *(u32 *)to = __raw_readl(from); - from += 4; - to += 4; - count -= 4; - } - - while (count) { - *(u8 *)to = __raw_readb(from); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_fromio); - -/* - * Copy data from "real" memory space to IO memory space. - */ -void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count) -{ - while (count && !IS_ALIGNED((unsigned long)to, 4)) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } - - while (count >= 4) { - __raw_writel(*(u32 *)from, to); - from += 4; - to += 4; - count -= 4; - } - - while (count) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_toio); - -/* - * "memset" on IO memory space. - */ -void __memset_io(volatile void __iomem *dst, int c, size_t count) -{ - u32 qc = (u8)c; - - qc |= qc << 8; - qc |= qc << 16; - - while (count && !IS_ALIGNED((unsigned long)dst, 4)) { - __raw_writeb(c, dst); - dst++; - count--; - } - - while (count >= 4) { - __raw_writel(qc, dst); - dst += 4; - count -= 4; - } - - while (count) { - __raw_writeb(c, dst); - dst++; - count--; - } -} -EXPORT_SYMBOL(__memset_io); -- 2.34.1
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