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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sparc/include/asm/asmmacro.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/include/asm/asmmacro.h')
-rw-r--r--arch/sparc/include/asm/asmmacro.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/asmmacro.h b/arch/sparc/include/asm/asmmacro.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/* asmmacro.h: Assembler macros.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
+ */
+
+#ifndef _SPARC_ASMMACRO_H
+#define _SPARC_ASMMACRO_H
+
+/* All trap entry points _must_ begin with this macro or else you
+ * lose. It makes sure the kernel has a proper window so that
+ * c-code can be called.
+ */
+#define SAVE_ALL_HEAD \
+ sethi %hi(trap_setup), %l4; \
+ jmpl %l4 + %lo(trap_setup), %l6;
+#define SAVE_ALL \
+ SAVE_ALL_HEAD \
+ nop;
+
+/* All traps low-level code here must end with this macro. */
+#define RESTORE_ALL b ret_trap_entry; clr %l6;
+
+/* Support for run-time patching of single instructions.
+ * This is used to handle the differences in the ASI for
+ * MMUREGS for LEON and SUN.
+ *
+ * Sample:
+ * LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0
+ * SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0
+ * PI == Patch Instruction
+ *
+ * For LEON we will use the first variant,
+ * and for all other we will use the SUN variant.
+ * The order is important.
+ */
+#define LEON_PI(...) \
+662: __VA_ARGS__
+
+#define SUN_PI_(...) \
+ .section .leon_1insn_patch, "ax"; \
+ .word 662b; \
+ __VA_ARGS__; \
+ .previous
+
+#endif /* !(_SPARC_ASMMACRO_H) */