xen: arm: rename atag_paddr argument fdt_paddr

We don't support ATAGs and this is always actually an FDT address.

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/arm32/head.S

@@ -73,7 +73,7 @@ past_zImage:
 
         /* Save the bootloader arguments in less-clobberable registers */
         /* No need to save r1 == Unused ARM-linux machine type */
-        mov   r8, r2                 /* r8 := ATAG base address */
+        mov   r8, r2                 /* r8 := DTB base address */
 
         /* Find out where we are */
         ldr   r0, =start
@@ -334,7 +334,7 @@ launch:
         add   sp, #STACK_SIZE        /* (which grows down from the top). */
         sub   sp, #CPUINFO_sizeof    /* Make room for CPU save record */
         mov   r0, r10                /* Marshal args: - phys_offset */
-        mov   r1, r8                 /*               - ATAG address */
+        mov   r1, r8                 /*               - DTB address */
         movs  r2, r12                /*               - CPU ID */
         beq   start_xen              /* and disappear into the land of C */
         b     start_secondary        /* (to the appropriate entry point) */

xen/arch/arm/setup.c

@@ -329,7 +329,7 @@ void __init setup_cache(void)
 
 /* C entry point for boot CPU */
 void __init start_xen(unsigned long boot_phys_offset,
-                      unsigned long atag_paddr,
+                      unsigned long fdt_paddr,
                       unsigned long cpuid)
 {
     void *fdt;
@@ -341,7 +341,7 @@ void __init start_xen(unsigned long boot_phys_offset,
     smp_clear_cpu_maps();
 
     fdt = (void *)BOOT_MISC_VIRT_START
-        + (atag_paddr & ((1 << SECOND_SHIFT) - 1));
+        + (fdt_paddr & ((1 << SECOND_SHIFT) - 1));
     fdt_size = device_tree_early_init(fdt);
 
     cpus = smp_get_max_cpus();
@@ -365,7 +365,7 @@ void __init start_xen(unsigned long boot_phys_offset,
     set_current((struct vcpu *)0xfffff000); /* debug sanity */
     idle_vcpu[0] = current;
 
-    setup_mm(atag_paddr, fdt_size);
+    setup_mm(fdt_paddr, fdt_size);
 
     /* Setup Hyp vector base */
     WRITE_CP32((uint32_t) hyp_traps_vector, HVBAR);

xen/arch/arm/smpboot.c

@@ -132,7 +132,7 @@ make_cpus_ready(unsigned int max_cpus, unsigned long boot_phys_offset)
 
 /* Boot the current CPU */
 void __cpuinit start_secondary(unsigned long boot_phys_offset,
-                               unsigned long atag_paddr,
+                               unsigned long fdt_paddr,
                                unsigned long cpuid)
 {
     memset(get_cpu_info(), 0, sizeof (struct cpu_info));