diff mbox

[U-Boot,v3,09/11] armv8: ls2080a: Drop early MMU for SPL build

Message ID 1488396743-29340-10-git-send-email-york.sun@nxp.com
State Accepted
Commit f539c8a4a7a590e1933a7e21d5771528db1d88b7
Delegated to: York Sun
Headers show

Commit Message

York Sun March 1, 2017, 7:32 p.m. UTC 
Early MMU improves performance especially on emulators. However, the
early MMU is left enabled after the first stage of SPL boot. Instead
of flushing D-cache and dealing with re-enabling MMU for the second
stage U-Boot, disabling it for SPL build simplifies the process. The
performance penalty is unnoticeable on the real hardware. As of now,
SPL boot is not supported by existing emulators. So this should have
no impact on emulators.

Signed-off-by: York Sun <york.sun@nxp.com>

---

Changes in v3:
  Add a patch to drop early MMU setup for LS2080A SPL build.

Changes in v2: None

 arch/arm/cpu/armv8/fsl-layerscape/spl.c | 3 ---
 1 file changed, 3 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/spl.c b/arch/arm/cpu/armv8/fsl-layerscape/spl.c
index 1dabdbb..73a8680 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/spl.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/spl.c
@@ -45,9 +45,6 @@  void board_init_f(ulong dummy)
 {
 	/* Clear global data */
 	memset((void *)gd, 0, sizeof(gd_t));
-#ifdef CONFIG_LS2080A
-	arch_cpu_init();
-#endif
 	board_early_init_f();
 	timer_init();
 #ifdef CONFIG_LS2080A