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-rw-r--r--Documentation/powerpc/booting-without-of.txt57
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1 Booting the Linux/ppc kernel without Open Firmware 1 Booting the Linux/ppc kernel without Open Firmware
2 -------------------------------------------------- 2 --------------------------------------------------
3 3
4
5(c) 2005 Benjamin Herrenschmidt <benh at kernel.crashing.org>, 4(c) 2005 Benjamin Herrenschmidt <benh at kernel.crashing.org>,
6 IBM Corp. 5 IBM Corp.
7(c) 2005 Becky Bruce <becky.bruce at freescale.com>, 6(c) 2005 Becky Bruce <becky.bruce at freescale.com>,
@@ -9,6 +8,62 @@
9(c) 2006 MontaVista Software, Inc. 8(c) 2006 MontaVista Software, Inc.
10 Flash chip node definition 9 Flash chip node definition
11 10
11Table of Contents
12=================
13
14 I - Introduction
15 1) Entry point for arch/powerpc
16 2) Board support
17
18 II - The DT block format
19 1) Header
20 2) Device tree generalities
21 3) Device tree "structure" block
22 4) Device tree "strings" block
23
24 III - Required content of the device tree
25 1) Note about cells and address representation
26 2) Note about "compatible" properties
27 3) Note about "name" properties
28 4) Note about node and property names and character set
29 5) Required nodes and properties
30 a) The root node
31 b) The /cpus node
32 c) The /cpus/* nodes
33 d) the /memory node(s)
34 e) The /chosen node
35 f) the /soc<SOCname> node
36
37 IV - "dtc", the device tree compiler
38
39 V - Recommendations for a bootloader
40
41 VI - System-on-a-chip devices and nodes
42 1) Defining child nodes of an SOC
43 2) Representing devices without a current OF specification
44 a) MDIO IO device
45 c) PHY nodes
46 b) Gianfar-compatible ethernet nodes
47 d) Interrupt controllers
48 e) I2C
49 f) Freescale SOC USB controllers
50 g) Freescale SOC SEC Security Engines
51 h) Board Control and Status (BCSR)
52 i) Freescale QUICC Engine module (QE)
53 g) Flash chip nodes
54
55 VII - Specifying interrupt information for devices
56 1) interrupts property
57 2) interrupt-parent property
58 3) OpenPIC Interrupt Controllers
59 4) ISA Interrupt Controllers
60
61 Appendix A - Sample SOC node for MPC8540
62
63
64Revision Information
65====================
66
12 May 18, 2005: Rev 0.1 - Initial draft, no chapter III yet. 67 May 18, 2005: Rev 0.1 - Initial draft, no chapter III yet.
13 68
14 May 19, 2005: Rev 0.2 - Add chapter III and bits & pieces here or 69 May 19, 2005: Rev 0.2 - Add chapter III and bits & pieces here or