x86, trampoline: Use the unified trampoline setup for ACPI wakeup
Use the unified trampoline allocation setup to allocate and install
the ACPI wakeup code in low memory.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 211ca3f..4784df5 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -29,6 +29,7 @@
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/mpspec.h>
+#include <asm/trampoline.h>
#define COMPILER_DEPENDENT_INT64 long long
#define COMPILER_DEPENDENT_UINT64 unsigned long long
@@ -116,7 +117,8 @@
extern int acpi_save_state_mem(void);
extern void acpi_restore_state_mem(void);
-extern unsigned long acpi_wakeup_address;
+extern const unsigned char acpi_wakeup_code[];
+#define acpi_wakeup_address (__pa(TRAMPOLINE_SYM(acpi_wakeup_code)))
/* early initialization routine */
extern void acpi_reserve_wakeup_memory(void);
diff --git a/arch/x86/include/asm/trampoline.h b/arch/x86/include/asm/trampoline.h
index f4500fb..feca311 100644
--- a/arch/x86/include/asm/trampoline.h
+++ b/arch/x86/include/asm/trampoline.h
@@ -3,25 +3,36 @@
#ifndef __ASSEMBLY__
-#ifdef CONFIG_X86_TRAMPOLINE
+#include <linux/types.h>
+#include <asm/io.h>
+
/*
- * Trampoline 80x86 program as an array.
+ * Trampoline 80x86 program as an array. These are in the init rodata
+ * segment, but that's okay, because we only care about the relative
+ * addresses of the symbols.
*/
-extern const unsigned char trampoline_data [];
-extern const unsigned char trampoline_end [];
-extern unsigned char *trampoline_base;
+extern const unsigned char x86_trampoline_start [];
+extern const unsigned char x86_trampoline_end [];
+extern unsigned char *x86_trampoline_base;
extern unsigned long init_rsp;
extern unsigned long initial_code;
extern unsigned long initial_gs;
-#define TRAMPOLINE_SIZE roundup(trampoline_end - trampoline_data, PAGE_SIZE)
+extern void __init setup_trampolines(void);
-extern unsigned long setup_trampoline(void);
-extern void __init reserve_trampoline_memory(void);
-#else
-static inline void reserve_trampoline_memory(void) {}
-#endif /* CONFIG_X86_TRAMPOLINE */
+extern const unsigned char trampoline_data[];
+extern const unsigned char trampoline_status[];
+
+#define TRAMPOLINE_SYM(x) \
+ ((void *)(x86_trampoline_base + \
+ ((const unsigned char *)(x) - x86_trampoline_start)))
+
+/* Address of the SMP trampoline */
+static inline unsigned long trampoline_address(void)
+{
+ return virt_to_phys(TRAMPOLINE_SYM(trampoline_data));
+}
#endif /* __ASSEMBLY__ */