arm: move get_paddr_function to arch setup.c from device_tree.c

It's not realy got any DT functionality in it and its only caller is
setup_pagetables.

Put it here because future patches want to incorporate of the module
layout in memory and I'd like to confine that to setup.c

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

xen/arch/arm/mm.c

@@ -205,15 +205,12 @@ void unmap_domain_page(const void *va)
 
 /* Boot-time pagetable setup.
  * Changes here may need matching changes in head.S */
-void __init setup_pagetables(unsigned long boot_phys_offset)
+void __init setup_pagetables(unsigned long boot_phys_offset, paddr_t xen_paddr)
 {
-    paddr_t xen_paddr;
     unsigned long dest_va;
     lpae_t pte, *p;
     int i;
 
-    xen_paddr = device_tree_get_xen_paddr();
-
     /* Map the destination in the boot misc area. */
     dest_va = BOOT_MISC_VIRT_START;
     pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT);

xen/arch/arm/setup.c

@@ -38,6 +38,7 @@
 #include <asm/current.h>
 #include <asm/setup.h>
 #include <asm/vfp.h>
+#include <asm/early_printk.h>
 #include "gic.h"
 
 static __attribute_used__ void init_done(void)
@@ -67,6 +68,38 @@ static void __init processor_id(void)
            READ_CP32(ID_ISAR3), READ_CP32(ID_ISAR4), READ_CP32(ID_ISAR5));
 }
 
+/**
+ * get_xen_paddr - get physical address to relocate Xen to
+ *
+ * Xen is relocated to the top of RAM and aligned to a XEN_PADDR_ALIGN
+ * boundary.
+ */
+static paddr_t __init get_xen_paddr(void)
+{
+    struct dt_mem_info *mi = &early_info.mem;
+    paddr_t min_size;
+    paddr_t paddr = 0, t;
+    int i;
+
+    min_size = (_end - _start + (XEN_PADDR_ALIGN-1)) & ~(XEN_PADDR_ALIGN-1);
+
+    /* Find the highest bank with enough space. */
+    for ( i = 0; i < mi->nr_banks; i++ )
+    {
+        if ( mi->bank[i].size >= min_size )
+        {
+            t = mi->bank[i].start + mi->bank[i].size - min_size;
+            if ( t > paddr )
+                paddr = t;
+        }
+    }
+
+    if ( !paddr )
+        early_panic("Not enough memory to relocate Xen\n");
+
+    return paddr;
+}
+
 static void __init setup_mm(unsigned long dtb_paddr, size_t dtb_size)
 {
     paddr_t ram_start;
@@ -156,7 +189,7 @@ void __init start_xen(unsigned long boot_phys_offset,
 
     cmdline_parse(device_tree_bootargs(fdt));
 
-    setup_pagetables(boot_phys_offset);
+    setup_pagetables(boot_phys_offset, get_xen_paddr());
 
 #ifdef EARLY_UART_ADDRESS
     /* Map the UART */

xen/common/device_tree.c

@@ -273,38 +273,6 @@ size_t __init device_tree_early_init(const void *fdt)
     return fdt_totalsize(fdt);
 }
 
-/**
- * device_tree_get_xen_paddr - get physical address to relocate Xen to
- *
- * Xen is relocated to the top of RAM and aligned to a XEN_PADDR_ALIGN
- * boundary.
- */
-paddr_t __init device_tree_get_xen_paddr(void)
-{
-    struct dt_mem_info *mi = &early_info.mem;
-    paddr_t min_size;
-    paddr_t paddr = 0, t;
-    int i;
-
-    min_size = (_end - _start + (XEN_PADDR_ALIGN-1)) & ~(XEN_PADDR_ALIGN-1);
-
-    /* Find the highest bank with enough space. */
-    for ( i = 0; i < mi->nr_banks; i++ )
-    {
-        if ( mi->bank[i].size >= min_size )
-        {
-            t = mi->bank[i].start + mi->bank[i].size - min_size;
-            if ( t > paddr )
-                paddr = t;
-        }
-    }
-
-    if ( !paddr )
-        early_panic("Not enough memory to relocate Xen\n");
-
-    return paddr;
-}
-
 /*
  * Local variables:
  * mode: C

xen/include/asm-arm/mm.h

@@ -138,7 +138,7 @@ extern unsigned long max_page;
 extern unsigned long total_pages;
 
 /* Boot-time pagetable setup */
-extern void setup_pagetables(unsigned long boot_phys_offset);
+extern void setup_pagetables(unsigned long boot_phys_offset, paddr_t xen_paddr);
 /* MMU setup for seccondary CPUS (which already have paging enabled) */
 extern void __cpuinit mmu_init_secondary_cpu(void);
 /* Set up the xenheap: up to 1GB of contiguous, always-mapped memory.

xen/include/xen/device_tree.h

@@ -39,7 +39,6 @@ extern struct dt_early_info early_info;
 extern void *device_tree_flattened;
 
 size_t device_tree_early_init(const void *fdt);
-paddr_t device_tree_get_xen_paddr(void);
 
 void device_tree_get_reg(const u32 **cell, u32 address_cells, u32 size_cells,
                          u64 *start, u64 *size);