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[POWERPC] Add early debug console for CPM serial ports.

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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>
This commit is contained in:
Scott Wood
2007-07-16 11:43:43 -05:00
committed by Kumar Gala
parent e631ae3b16
commit c374e00e17
8 changed files with 92 additions and 0 deletions
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16
arch/powerpc/kernel/head_32.S
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@ -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.