sparc,sparc64: prepare vmlinux.lds.S for unification

This patch makes the two vmlinux.lds.S files identical
and serve as documentation for the changes in each file.

This mainly add stuffs to sparc32 that is otherwise only
used by sparc64 and thus it should have no effect.

Build tested only.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 37 insertions, 8 deletions

diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S
index 01f809617e5e..4bfbeffb7320 100644
--- a/arch/sparc64/kernel/vmlinux.lds.S
+++ b/arch/sparc64/kernel/vmlinux.lds.S
@@ -1,19 +1,45 @@
-/* ld script to make UltraLinux kernel */
+/* ld script for sparc32/sparc64 kernel */
 
-#include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+
+#ifdef CONFIG_SPARC32
+#define INITIAL_ADDRESS  0x10000 + SIZEOF_HEADERS
+#define TEXTSTART       0xf0004000
+
+#define SMP_CACHE_BYTES_SHIFT 5
+
+#else
+#define SMP_CACHE_BYTES_SHIFT 6
+#define INITIAL_ADDRESS 0x4000
+#define TEXTSTART      0x0000000000404000
+
+#endif
+
+#define SMP_CACHE_BYTES (1 << SMP_CACHE_BYTES_SHIFT)
 
+#ifdef CONFIG_SPARC32
+OUTPUT_FORMAT("elf32-sparc", "elf32-sparc", "elf32-sparc")
+OUTPUT_ARCH(sparc)
+ENTRY(_start)
+jiffies = jiffies_64 + 4;
+#else
+/* sparc64 */
 OUTPUT_FORMAT("elf64-sparc", "elf64-sparc", "elf64-sparc")
 OUTPUT_ARCH(sparc:v9a)
 ENTRY(_start)
-
 jiffies = jiffies_64;
+#endif
+
 SECTIONS
 {
+        /* swapper_low_pmd_dir is sparc64 only */
         swapper_low_pmd_dir = 0x0000000000402000;
-        . = 0x4000;
-        .text 0x0000000000404000 : {
+        . = INITIAL_ADDRESS;
+        .text TEXTSTART :
+        {
                 _text = .;
+                *(.text.head)
                 TEXT_TEXT
                 SCHED_TEXT
                 LOCK_TEXT
@@ -24,25 +50,27 @@ SECTIONS
         PROVIDE (etext = .);
 
         RO_DATA(PAGE_SIZE)
-        .data : {
+        .data : {
                 DATA_DATA
                 CONSTRUCTORS
         }
         .data1 : {
                 *(.data1)
         }
-        . = ALIGN(64);
+        . = ALIGN(SMP_CACHE_BYTES);
         .data.cacheline_aligned : {
                 *(.data.cacheline_aligned)
         }
-        . = ALIGN(64);
+        . = ALIGN(SMP_CACHE_BYTES);
         .data.read_mostly : {
                 *(.data.read_mostly)
         }
         _edata = .;
         PROVIDE (edata = .);
         .fixup : {
+                __start___fixup = .;
                 *(.fixup)
+                __stop___fixup = .;
         }
         . = ALIGN(16);
         __ex_table : {
@@ -59,6 +87,7 @@ SECTIONS
                 INIT_TEXT
                 _einittext = .;
         }
+        __init_text_end = .;
         .init.data : {
                 INIT_DATA
         }