x86: do away with the boot time low-memory 1:1 mapping

By doing so, we're no longer restricted to be able to place all boot
loader modules into the low 1Gb/4Gb (32-/64-bit) of memory, nor is
there a dependency anymore on where the boot loader places the
modules.

We're also no longer restricted to copy the modules into a place below
4Gb, nor to put them all together into a single piece of memory.

Further it allows even the 32-bit Dom0 kernel to be loaded anywhere in
physical memory (except if it doesn't support PAE-above-4G).

Signed-off-by: Jan Beulich <jbeulich@novell.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/xen/include/asm-x86/setup.h b/xen/include/asm-x86/setup.h
index 743793ab34..d157196f47 100644
--- a/xen/include/asm-x86/setup.h
+++ b/xen/include/asm-x86/setup.h
@@ -1,6 +1,8 @@
 #ifndef __X86_SETUP_H_
 #define __X86_SETUP_H_
 
+#include <xen/multiboot.h>
+
 extern int early_boot;
 extern unsigned long xenheap_initial_phys_start;
 
@@ -25,4 +27,14 @@ void init_IRQ(void);
 void vesa_init(void);
 void vesa_mtrr_init(void);
 
+int construct_dom0(
+    struct domain *d,
+    const module_t *kernel, unsigned long kernel_headroom,
+    const module_t *initrd,
+    void *(*bootstrap_map)(const module_t *),
+    char *cmdline);
+
+unsigned long initial_images_nrpages(void);
+void discard_initial_images(void);
+
 #endif