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authorIngo Molnar <mingo@elte.hu>2008-03-21 15:23:19 +0100
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:41:37 +0200
commit77ad386e596c6b0930cc2e09e3cce485e3ee7f72 (patch)
tree5c4a9b664c8ecf8147996a32eae35ff7e7350f89 /arch/x86
parente44b7b7525ad9d43163ab5e60c784325419e0ea6 (diff)
x86: standalone trampoline code
move the trampoline setup code out of smpboot.c - UP kernels can have suspend support too. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/Makefile1
-rw-r--r--arch/x86/kernel/smpboot.c15
-rw-r--r--arch/x86/kernel/trampoline.c18
3 files changed, 19 insertions, 15 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index fdd8395e0ed3..530ed6a4a031 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -28,6 +28,7 @@ obj-y += alternative.o i8253.o
obj-$(CONFIG_X86_64) += pci-nommu_64.o bugs_64.o
obj-y += tsc_$(BITS).o io_delay.o rtc.o
+obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
obj-y += i387.o
obj-y += ptrace.o
obj-y += ds.o
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 424600e671bd..e6abe8a49b1f 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -140,9 +140,6 @@ static atomic_t init_deasserted;
static int boot_cpu_logical_apicid;
-/* ready for x86_64, no harm for x86, since it will overwrite after alloc */
-unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
-
/* representing cpus for which sibling maps can be computed */
static cpumask_t cpu_sibling_setup_map;
@@ -550,18 +547,6 @@ cpumask_t cpu_coregroup_map(int cpu)
return c->llc_shared_map;
}
-/*
- * Currently trivial. Write the real->protected mode
- * bootstrap into the page concerned. The caller
- * has made sure it's suitably aligned.
- */
-unsigned long setup_trampoline(void)
-{
- memcpy(trampoline_base, trampoline_data,
- trampoline_end - trampoline_data);
- return virt_to_phys(trampoline_base);
-}
-
#ifdef CONFIG_X86_32
/*
* We are called very early to get the low memory for the
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
new file mode 100644
index 000000000000..abbf199adebb
--- /dev/null
+++ b/arch/x86/kernel/trampoline.c
@@ -0,0 +1,18 @@
+#include <linux/io.h>
+
+#include <asm/trampoline.h>
+
+/* ready for x86_64, no harm for x86, since it will overwrite after alloc */
+unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
+
+/*
+ * Currently trivial. Write the real->protected mode
+ * bootstrap into the page concerned. The caller
+ * has made sure it's suitably aligned.
+ */
+unsigned long setup_trampoline(void)
+{
+ memcpy(trampoline_base, trampoline_data,
+ trampoline_end - trampoline_data);
+ return virt_to_phys(trampoline_base);
+}