Added arch_lmb_reserve to allow arch specific memory regions protection

Each architecture has different ways of determine what regions of memory
might not be valid to get overwritten when we boot.  This provides a
hook to allow them to reserve any regions they care about.  Currently
only ppc, m68k and sparc need/use this.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 28 insertions, 22 deletions

diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index d49881837..1f3501ae3 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -55,30 +55,10 @@ static void set_clocks_in_mhz (bd_t *kbd);
 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE	(768*1024*1024)
 #endif
 
-__attribute__((noinline))
-int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+void arch_lmb_reserve(struct lmb *lmb)
 {
-	ulong	sp;
-
-	ulong	initrd_start, initrd_end;
-	ulong	rd_len;
-	ulong	size;
 	phys_size_t bootm_size;
-
-	ulong	cmd_start, cmd_end, bootmap_base;
-	bd_t	*kbd;
-	void	(*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
-			  ulong r7, ulong r8, ulong r9);
-	int	ret;
-	ulong	of_size = images->ft_len;
-	struct lmb *lmb = &images->lmb;
-
-#if defined(CONFIG_OF_LIBFDT)
-	char	*of_flat_tree = images->ft_addr;
-#endif
-
-	kernel = (void (*)(bd_t *, ulong, ulong, ulong,
-			   ulong, ulong, ulong))images->ep;
+	ulong size, sp, bootmap_base;
 
 	bootmap_base = getenv_bootm_low();
 	bootm_size = getenv_bootm_size();
@@ -116,6 +96,32 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 	sp -= 1024;
 	lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
 
+	return ;
+}
+
+__attribute__((noinline))
+int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+{
+	ulong	initrd_start, initrd_end;
+	ulong	rd_len;
+
+	ulong	cmd_start, cmd_end, bootmap_base;
+	bd_t	*kbd;
+	void	(*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
+			  ulong r7, ulong r8, ulong r9);
+	int	ret;
+	ulong	of_size = images->ft_len;
+	struct lmb *lmb = &images->lmb;
+
+#if defined(CONFIG_OF_LIBFDT)
+	char	*of_flat_tree = images->ft_addr;
+#endif
+
+	kernel = (void (*)(bd_t *, ulong, ulong, ulong,
+			   ulong, ulong, ulong))images->ep;
+
+	bootmap_base = getenv_bootm_low();
+
 	if (!of_size) {
 		/* allocate space and init command line */
 		ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);