linux-kernel - [PATCH v2 3/4] RISC-V: Split out the XIP fixups into their own file

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Message-Id: <20220420184056.7886-4-palmer@rivosinc.com>
Date:   Wed, 20 Apr 2022 11:40:55 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:         linux-riscv@...ts.infradead.org, rdunlap@...radead.org
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, aou@...s.berkeley.edu,
        anup@...infault.org, vincent.chen@...ive.com, guoren@...nel.org,
        Atish Patra <atishp@...osinc.com>,
        alexandre.ghiti@...onical.com, jszhang@...nel.org,
        vitaly.wool@...sulko.com, gatecat@....me,
        wangkefeng.wang@...wei.com, mick@....forth.gr,
        panqinglin2020@...as.ac.cn, rppt@...nel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux@...osinc.com, Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH v2 3/4] RISC-V: Split out the XIP fixups into their own file

From: Palmer Dabbelt <palmer@...osinc.com>

This was broken by the original refactoring (as the XIP definitions
depend on <asm/pgtable.h>) and then more broken by the merge (as I
accidentally took the old version).  This fixes both breakages, while
also pulling this out of <asm/asm.h> to avoid polluting most assembly
files with the XIP fixups.

Fixes: bee7fbc38579 ("RISC-V CPU Idle Support")
Fixes: 63b13e64a829 ("RISC-V: Add arch functions for non-retentive suspend entry/exit")
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
---
 arch/riscv/include/asm/asm.h       | 26 ------------------------
 arch/riscv/include/asm/xip_fixup.h | 32 ++++++++++++++++++++++++++++++
 arch/riscv/kernel/head.S           |  1 +
 arch/riscv/kernel/suspend_entry.S  |  1 +
 4 files changed, 34 insertions(+), 26 deletions(-)
 create mode 100644 arch/riscv/include/asm/xip_fixup.h

diff --git a/arch/riscv/include/asm/asm.h b/arch/riscv/include/asm/asm.h
index 8c2549b16ac0..618d7c5af1a2 100644
--- a/arch/riscv/include/asm/asm.h
+++ b/arch/riscv/include/asm/asm.h
@@ -67,30 +67,4 @@
 #error "Unexpected __SIZEOF_SHORT__"
 #endif
 
-#ifdef __ASSEMBLY__
-
-/* Common assembly source macros */
-
-#ifdef CONFIG_XIP_KERNEL
-.macro XIP_FIXUP_OFFSET reg
-	REG_L t0, _xip_fixup
-	add \reg, \reg, t0
-.endm
-.macro XIP_FIXUP_FLASH_OFFSET reg
-	la t1, __data_loc
-	REG_L t1, _xip_phys_offset
-	sub \reg, \reg, t1
-	add \reg, \reg, t0
-.endm
-_xip_fixup: .dword CONFIG_PHYS_RAM_BASE - CONFIG_XIP_PHYS_ADDR - XIP_OFFSET
-_xip_phys_offset: .dword CONFIG_XIP_PHYS_ADDR + XIP_OFFSET
-#else
-.macro XIP_FIXUP_OFFSET reg
-.endm
-.macro XIP_FIXUP_FLASH_OFFSET reg
-.endm
-#endif /* CONFIG_XIP_KERNEL */
-
-#endif /* __ASSEMBLY__ */
-
 #endif /* _ASM_RISCV_ASM_H */
diff --git a/arch/riscv/include/asm/xip_fixup.h b/arch/riscv/include/asm/xip_fixup.h
new file mode 100644
index 000000000000..0d0754305324
--- /dev/null
+++ b/arch/riscv/include/asm/xip_fixup.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * XIP fixup macros, only useful in assembly.
+ */
+#ifndef _ASM_RISCV_XIP_FIXUP_H
+#define _ASM_RISCV_XIP_FIXUP_H
+
+#include <linux/pgtable.h>
+
+#ifdef CONFIG_XIP_KERNEL
+.macro XIP_FIXUP_OFFSET reg
+        REG_L t0, _xip_fixup
+        add \reg, \reg, t0
+.endm
+.macro XIP_FIXUP_FLASH_OFFSET reg
+        la t1, __data_loc
+        li t0, XIP_OFFSET_MASK
+        and t1, t1, t0
+        li t1, XIP_OFFSET
+        sub t0, t0, t1
+        sub \reg, \reg, t0
+.endm
+
+_xip_fixup: .dword CONFIG_PHYS_RAM_BASE - CONFIG_XIP_PHYS_ADDR - XIP_OFFSET
+#else
+.macro XIP_FIXUP_OFFSET reg
+.endm
+.macro XIP_FIXUP_FLASH_OFFSET reg
+.endm
+#endif /* CONFIG_XIP_KERNEL */
+
+#endif
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index 893b8bb69391..822c33aa7f45 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -14,6 +14,7 @@
 #include <asm/hwcap.h>
 #include <asm/image.h>
+#include <asm/xip_fixup.h>
 #include "efi-header.S"
 
 __HEAD
diff --git a/arch/riscv/kernel/suspend_entry.S b/arch/riscv/kernel/suspend_entry.S
index 4b07b809a2b8..aafcca58c19d 100644
--- a/arch/riscv/kernel/suspend_entry.S
+++ b/arch/riscv/kernel/suspend_entry.S
@@ -8,6 +8,7 @@
 #include <asm/asm.h>
 #include <asm/asm-offsets.h>
 #include <asm/csr.h>
+#include <asm/xip_fixup.h>
 
 	.text
 	.altmacro
-- 
2.34.1