linux-kernel - [RFC PATCH 1/5] riscv: Define ioremap

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Message-Id: <20250910093347.75822-2-tianruidong@linux.alibaba.com>
Date: Wed, 10 Sep 2025 17:33:43 +0800
From: Ruidong Tian <tianruidong@...ux.alibaba.com>
To: xueshuai@...ux.alibaba.com,
	palmer@...belt.com,
	paul.walmsley@...ive.com,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Cc: james.morse@....com,
	tony.luck@...el.com,
	cleger@...osinc.com,
	hchauhan@...tanamicro.com,
	tianruidong@...ux.alibaba.com
Subject: [RFC PATCH 1/5] riscv: Define ioremap_cache for RISC-V

From: Himanshu Chauhan <hchauhan@...tanamicro.com>

bert and einj drivers use ioremap_cache for mapping entries
but ioremap_cache is not defined for RISC-V.

Signed-off-by: Himanshu Chauhan <hchauhan@...tanamicro.com>
---
 arch/riscv/include/asm/io.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
index a0e51840b9db..56eca6b3031f 100644
--- a/arch/riscv/include/asm/io.h
+++ b/arch/riscv/include/asm/io.h
@@ -30,6 +30,9 @@
 #define PCI_IOBASE		((void __iomem *)PCI_IO_START)
 #endif /* CONFIG_MMU */
 
+#define ioremap_cache(addr, size)					\
+	((__force void *)ioremap_prot((addr), (size), __pgprot(_PAGE_KERNEL)))
+
 /*
  * Emulation routines for the port-mapped IO space used by some PCI drivers.
  * These are defined as being "fully synchronous", but also "not guaranteed to
-- 
2.43.7