summaryrefslogtreecommitdiff
path: root/arch/ia64/include/asm/asmmacro.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ia64/include/asm/asmmacro.h')
-rw-r--r--arch/ia64/include/asm/asmmacro.h135
1 files changed, 135 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/asmmacro.h b/arch/ia64/include/asm/asmmacro.h
new file mode 100644
index 000000000000..c1642fd64029
--- /dev/null
+++ b/arch/ia64/include/asm/asmmacro.h
@@ -0,0 +1,135 @@
+#ifndef _ASM_IA64_ASMMACRO_H
+#define _ASM_IA64_ASMMACRO_H
+
+/*
+ * Copyright (C) 2000-2001, 2003-2004 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+
+#define ENTRY(name) \
+ .align 32; \
+ .proc name; \
+name:
+
+#define ENTRY_MIN_ALIGN(name) \
+ .align 16; \
+ .proc name; \
+name:
+
+#define GLOBAL_ENTRY(name) \
+ .global name; \
+ ENTRY(name)
+
+#define END(name) \
+ .endp name
+
+/*
+ * Helper macros to make unwind directives more readable:
+ */
+
+/* prologue_gr: */
+#define ASM_UNW_PRLG_RP 0x8
+#define ASM_UNW_PRLG_PFS 0x4
+#define ASM_UNW_PRLG_PSP 0x2
+#define ASM_UNW_PRLG_PR 0x1
+#define ASM_UNW_PRLG_GRSAVE(ninputs) (32+(ninputs))
+
+/*
+ * Helper macros for accessing user memory.
+ *
+ * When adding any new .section/.previous entries here, make sure to
+ * also add it to the DISCARD section in arch/ia64/kernel/gate.lds.S or
+ * unpleasant things will happen.
+ */
+
+ .section "__ex_table", "a" // declare section & section attributes
+ .previous
+
+# define EX(y,x...) \
+ .xdata4 "__ex_table", 99f-., y-.; \
+ [99:] x
+# define EXCLR(y,x...) \
+ .xdata4 "__ex_table", 99f-., y-.+4; \
+ [99:] x
+
+/*
+ * Tag MCA recoverable instruction ranges.
+ */
+
+ .section "__mca_table", "a" // declare section & section attributes
+ .previous
+
+# define MCA_RECOVER_RANGE(y) \
+ .xdata4 "__mca_table", y-., 99f-.; \
+ [99:]
+
+/*
+ * Mark instructions that need a load of a virtual address patched to be
+ * a load of a physical address. We use this either in critical performance
+ * path (ivt.S - TLB miss processing) or in places where it might not be
+ * safe to use a "tpa" instruction (mca_asm.S - error recovery).
+ */
+ .section ".data.patch.vtop", "a" // declare section & section attributes
+ .previous
+
+#define LOAD_PHYSICAL(pr, reg, obj) \
+[1:](pr)movl reg = obj; \
+ .xdata4 ".data.patch.vtop", 1b-.
+
+/*
+ * For now, we always put in the McKinley E9 workaround. On CPUs that don't need it,
+ * we'll patch out the work-around bundles with NOPs, so their impact is minimal.
+ */
+#define DO_MCKINLEY_E9_WORKAROUND
+
+#ifdef DO_MCKINLEY_E9_WORKAROUND
+ .section ".data.patch.mckinley_e9", "a"
+ .previous
+/* workaround for Itanium 2 Errata 9: */
+# define FSYS_RETURN \
+ .xdata4 ".data.patch.mckinley_e9", 1f-.; \
+1:{ .mib; \
+ nop.m 0; \
+ mov r16=ar.pfs; \
+ br.call.sptk.many b7=2f;; \
+ }; \
+2:{ .mib; \
+ nop.m 0; \
+ mov ar.pfs=r16; \
+ br.ret.sptk.many b6;; \
+ }
+#else
+# define FSYS_RETURN br.ret.sptk.many b6
+#endif
+
+/*
+ * If physical stack register size is different from DEF_NUM_STACK_REG,
+ * dynamically patch the kernel for correct size.
+ */
+ .section ".data.patch.phys_stack_reg", "a"
+ .previous
+#define LOAD_PHYS_STACK_REG_SIZE(reg) \
+[1:] adds reg=IA64_NUM_PHYS_STACK_REG*8+8,r0; \
+ .xdata4 ".data.patch.phys_stack_reg", 1b-.
+
+/*
+ * Up until early 2004, use of .align within a function caused bad unwind info.
+ * TEXT_ALIGN(n) expands into ".align n" if a fixed GAS is available or into nothing
+ * otherwise.
+ */
+#ifdef HAVE_WORKING_TEXT_ALIGN
+# define TEXT_ALIGN(n) .align n
+#else
+# define TEXT_ALIGN(n)
+#endif
+
+#ifdef HAVE_SERIALIZE_DIRECTIVE
+# define dv_serialize_data .serialize.data
+# define dv_serialize_instruction .serialize.instruction
+#else
+# define dv_serialize_data
+# define dv_serialize_instruction
+#endif
+
+#endif /* _ASM_IA64_ASMMACRO_H */