[OpenBIOS] [RFC PATCH 2/2] implement /uni-n node

[Amadeusz Sławiński]

it is required by xnu to boot on newworld machines

there are still two thing to investigate

1. reg property, seems to have different size on real machine than in qemu
http://web.archive.org/web/20090107151044/http://penguinppc.org/historical/dev-trees-html/g4_agp_500_2.html
0x01000000 vs 0x00001000

2. which value to put in device-rev property
According to
http://www.opensource.apple.com/source/AppleCore99PE/AppleCore99PE-121.0.2/Core99.h
there are 3 possible values 3, 7, 10 and depending on them kernel takes different codepaths just look for "kUniNVersion" in:
http://www.opensource.apple.com/source/AppleCore99PE/AppleCore99PE-121.0.2/Core99.cpp 

Signed-off-by: Amadeusz Sławiński <amade at asmblr.net>
---
 arch/ppc/qemu/init.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/arch/ppc/qemu/init.c b/arch/ppc/qemu/init.c
index 5a11610..7f93d82 100644
--- a/arch/ppc/qemu/init.c
+++ b/arch/ppc/qemu/init.c
@@ -639,6 +639,56 @@ static void ffilll(void)
     }   
 }
 
+static void uni_n_init(void)
+{
+    push_str("/");
+    fword("find-device");
+
+    fword("new-device");
+    push_str("uni-n");
+    fword("device-name");
+
+    push_str("APPL,uninorth");
+    fword("encode-string");
+    push_str("model");
+    fword("property");
+
+    push_str("memory-controller");
+    fword("encode-string");
+    push_str("device_type");
+    fword("property");
+
+    push_str("uni-north");
+    fword("encode-string");
+    push_str("compatible");
+    fword("property");
+
+    PUSH(1);
+    fword("encode-int");
+    push_str("#address-cells");
+    fword("property");
+
+    PUSH(1);
+    fword("encode-int");
+    push_str("#size-cells");
+    fword("property");
+
+    PUSH(0xf8000000);
+    fword("encode-int");
+    PUSH(0x00001000); // XXX: check this on qemu is 0x1000 on net is 0x1000000
+    fword("encode-int");
+    fword("encode+");
+    push_str("reg");
+    fword("property");
+
+    PUSH(0);
+    fword("encode-int");
+    push_str("device-rev");
+    fword("property");
+
+    fword("finish-device");
+}
+
 void
 arch_of_init(void)
 {
@@ -908,4 +958,8 @@ arch_of_init(void)
     
     bind_func("platform-boot", boot);
     bind_func("(go)", go);
+
+    if (is_newworld()) {
+        uni_n_init();
+    }
 }
-- 
1.8.1.4