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Diffstat (limited to 'arch/powerpc/boot/main.c')
-rw-r--r--arch/powerpc/boot/main.c46
1 files changed, 22 insertions, 24 deletions
diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c
index 64ec93116fa..55ec5986725 100644
--- a/arch/powerpc/boot/main.c
+++ b/arch/powerpc/boot/main.c
@@ -21,8 +21,8 @@ extern void flush_cache(void *, unsigned long);
/* Value picked to match that used by yaboot */
-#define PROG_START 0x01400000
-#define RAM_END (512<<20) // Fixme: use OF */
+#define PROG_START 0x01400000 /* only used on 64-bit systems */
+#define RAM_END (512<<20) /* Fixme: use OF */
#define ONE_MB 0x100000
extern char _start[];
@@ -160,6 +160,17 @@ static int is_elf64(void *hdr)
elfoffset = (unsigned long)elf64ph->p_offset;
vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;
+
+#if defined(PROG_START)
+ /*
+ * Maintain a "magic" minimum address. This keeps some older
+ * firmware platforms running.
+ */
+
+ if (claim_base < PROG_START)
+ claim_base = PROG_START;
+#endif
+
return 1;
}
@@ -206,12 +217,18 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
exit();
if (getprop(chosen_handle, "stdout", &stdout, sizeof(stdout)) != 4)
exit();
- stderr = stdout;
- if (getprop(chosen_handle, "stdin", &stdin, sizeof(stdin)) != 4)
- exit();
printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp);
+ /*
+ * The first available claim_base must be above the end of the
+ * the loaded kernel wrapper file (_start to _end includes the
+ * initrd image if it is present) and rounded up to a nice
+ * 1 MB boundary for good measure.
+ */
+
+ claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
+
vmlinuz.addr = (unsigned long)_vmlinux_start;
vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
@@ -228,25 +245,6 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
exit();
}
- /*
- * The first available claim_base must be above the end of the
- * the loaded kernel wrapper file (_start to _end includes the
- * initrd image if it is present) and rounded up to a nice
- * 1 MB boundary for good measure.
- */
-
- claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
-
-#if defined(PROG_START)
- /*
- * Maintain a "magic" minimum address. This keeps some older
- * firmware platforms running.
- */
-
- if (claim_base < PROG_START)
- claim_base = PROG_START;
-#endif
-
/* We need to claim the memsize plus the file offset since gzip
* will expand the header (file offset), then the kernel, then
* possible rubbish we don't care about. But the kernel bss must