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authorScott Wood <scottwood@freescale.com>2007-07-16 11:43:43 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-10-03 20:35:43 -0500
commitc374e00e17f1c10768d5af922a1ff33e43df2eb0 (patch)
treefc6149e7f3b86bb202c475d4414a926c481761b8 /arch/powerpc/kernel/head_32.S
parente631ae3b164158fbf486fbed5adb597696c4f0e5 (diff)
[POWERPC] Add early debug console for CPM serial ports.
This code assumes that the ports have been previously set up, with buffers in DPRAM. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/head_32.S')
-rw-r--r--arch/powerpc/kernel/head_32.S16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index c86c626cf15..d83f04e5a59 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -149,6 +149,9 @@ __after_mmu_off:
#if defined(CONFIG_BOOTX_TEXT)
bl setup_disp_bat
#endif
+#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
+ bl setup_cpm_bat
+#endif
/*
* Call setup_cpu for CPU 0 and initialize 6xx Idle
@@ -1245,6 +1248,19 @@ setup_disp_bat:
blr
#endif /* CONFIG_BOOTX_TEXT */
+#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
+setup_cpm_bat:
+ lis r8, 0xf000
+ ori r8, r8, 0x002a
+ mtspr SPRN_DBAT1L, r8
+
+ lis r11, 0xf000
+ ori r11, r11, (BL_1M << 2) | 2
+ mtspr SPRN_DBAT1U, r11
+
+ blr
+#endif
+
#ifdef CONFIG_8260
/* Jump into the system reset for the rom.
* We first disable the MMU, and then jump to the ROM reset address.