From c9593d22533995d0f928b07afe2cecf3195e759f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Tue, 28 Oct 2003 21:24:28 +0000
Subject: [PATCH] Now uses the OF root node properties "model" and
 "device_type" to get and idea about the underlying hardware (needed at other
 places). Calls arch_set_callback() right after MMU takeover.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5204 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../boot/platform/openfirmware/machine.h      | 23 +++++++++++
 src/kernel/boot/platform/openfirmware/start.c | 38 +++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 src/kernel/boot/platform/openfirmware/machine.h

diff --git a/src/kernel/boot/platform/openfirmware/machine.h b/src/kernel/boot/platform/openfirmware/machine.h
new file mode 100644
index 0000000000..c0fbd6b023
--- /dev/null
+++ b/src/kernel/boot/platform/openfirmware/machine.h
@@ -0,0 +1,23 @@
+/*
+** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef MACHINE_H
+#define MACHINE_H
+
+
+#include <SupportDefs.h>
+
+
+#define MACHINE_UNKNOWN	0x0000
+
+#define MACHINE_CHRP	0x0001
+#define MACHINE_MAC		0x0002
+
+#define MACHINE_PEGASOS	0x0100
+
+
+extern uint32 gMachine;
+	// stores the machine type
+
+#endif	/* MACHINE_H */
diff --git a/src/kernel/boot/platform/openfirmware/start.c b/src/kernel/boot/platform/openfirmware/start.c
index 751df8db1e..ac7e312945 100644
--- a/src/kernel/boot/platform/openfirmware/start.c
+++ b/src/kernel/boot/platform/openfirmware/start.c
@@ -13,6 +13,7 @@
 
 #include "openfirmware.h"
 #include "console.h"
+#include "machine.h"
 
 
 #define HEAP_SIZE 32768
@@ -27,6 +28,8 @@ extern void (*__ctor_end)(void);
 extern uint8 __bss_start;
 extern uint8 _end;
 
+uint32 gMachine;
+
 
 static void
 call_ctors(void)
@@ -46,6 +49,34 @@ clear_bss(void)
 }
 
 
+static void 
+determine_machine(void)
+{
+	int root = of_finddevice("/");
+	char buffer[64];
+	int length;
+	if ((length = of_getprop(root, "device_type", buffer, sizeof(buffer) - 1)) == OF_FAILED)
+		return;
+	buffer[length] = '\0';
+
+	// ToDo: add more, and be as generic as possible
+
+	gMachine = MACHINE_UNKNOWN;
+
+	if (!strcasecmp("chrp", buffer))
+		gMachine = MACHINE_CHRP;
+	else if (!strcasecmp("bootrom", buffer))
+		gMachine = MACHINE_MAC;
+
+	if ((length = of_getprop(root, "model", buffer, sizeof(buffer) - 1)) == OF_FAILED)
+		return;
+	buffer[length] = '\0';
+
+	if (!strcasecmp("pegasos", buffer))
+		gMachine |= MACHINE_PEGASOS;
+}
+
+
 void
 _start(uint32 _unused1, uint32 _unused3, void *openFirmwareEntry)
 {
@@ -68,8 +99,15 @@ start(void *openFirmwareEntry)
 	args.heap_size = HEAP_SIZE;
 
 	of_init(openFirmwareEntry);
+
+	determine_machine();
 	console_init();
+
+	// Initialize and take over MMU and set the OpenFirmware callbacks - it 
+	// will ask us for memory after that instead of maintaining it itself
+	// (the kernel will need to adjust the callback later on as well)
 	arch_mmu_init();
+	arch_set_callback();
 
 	main(&args);
 		// if everything wents fine, main() never returns