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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-11-23 17:57:25 +1100
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:49:54 +1100
commit51d3082fe6e55aecfa17113dbe98077c749f724c (patch)
tree9a1e2355d5988d8cc1ca511d53c1bb24b0baa17f /arch/powerpc/kernel/head_32.S
parent463ce0e103f419f51b1769111e73fe8bb305d0ec (diff)
downloadblackbird-op-linux-51d3082fe6e55aecfa17113dbe98077c749f724c.tar.gz
blackbird-op-linux-51d3082fe6e55aecfa17113dbe98077c749f724c.zip
[PATCH] powerpc: Unify udbg (#2)
This patch unifies udbg for both ppc32 and ppc64 when building the merged achitecture. xmon now has a single "back end". The powermac udbg stuff gets enriched with some ADB capabilities and btext output. In addition, the early_init callback is now called on ppc32 as well, approx. in the same order as ppc64 regarding device-tree manipulations. The init sequences of ppc32 and ppc64 are getting closer, I'll unify them in a later patch. For now, you can force udbg to the scc using "sccdbg" or to btext using "btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg output to something else than the autodetected OF output device in a later patch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/head_32.S')
-rw-r--r--arch/powerpc/kernel/head_32.S29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index ccdf94731e30..fdd34dbd8797 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -153,6 +153,9 @@ __after_mmu_off:
bl flush_tlbs
bl initial_bats
+#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
+ bl setup_disp_bat
+#endif
/*
* Call setup_cpu for CPU 0 and initialize 6xx Idle
@@ -1306,6 +1309,32 @@ initial_bats:
blr
+#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
+setup_disp_bat:
+ /*
+ * setup the display bat prepared for us in prom.c
+ */
+ mflr r8
+ bl reloc_offset
+ mtlr r8
+ addis r8,r3,disp_BAT@ha
+ addi r8,r8,disp_BAT@l
+ cmpwi cr0,r8,0
+ beqlr
+ lwz r11,0(r8)
+ lwz r8,4(r8)
+ mfspr r9,SPRN_PVR
+ rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
+ cmpwi 0,r9,1
+ beq 1f
+ mtspr SPRN_DBAT3L,r8
+ mtspr SPRN_DBAT3U,r11
+ blr
+1: mtspr SPRN_IBAT3L,r8
+ mtspr SPRN_IBAT3U,r11
+ blr
+#endif /* !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) */
+
#ifdef CONFIG_8260
/* Jump into the system reset for the rom.
* We first disable the MMU, and then jump to the ROM reset address.
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