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Fix a typo in device.c -- calling phase1 in phase2

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start documenting the device model -- since it is clear to me from
reading v2 that not even the v2 guys totally got it
call write_tables in stage2
fix the makefile to put stage2.o first to make sure it gets
called. 

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@135 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Ronald G. Minnich 2007-02-26 19:24:33 +00:00
parent f8682ef7f3
commit 0e68335b17
4 changed files with 106 additions and 3 deletions
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4
arch/x86/Makefile
View file

@ -106,8 +106,8 @@ $(obj)/stage0.init: $(STAGE0_OBJ)
# TODO: This should be compressed with the default compressor.
#
STAGE2_LIB_OBJ = $(obj)/clog2.o $(obj)/mem.o $(obj)/malloc.o \
$(obj)/stage2.o #$(obj)/tables.o
STAGE2_LIB_OBJ = $(obj)/stage2.o $(obj)/clog2.o $(obj)/mem.o $(obj)/malloc.o \
$(obj)/tables.o
STAGE2_DEVICE_OBJ = $(obj)/device.o $(obj)/device_util.o \
$(obj)/root_device.o
STAGE2_ARCH_X86_OBJ = $(obj)/archtables.o $(obj)/linuxbios_table.o

2
device/device.c
View file

@ -616,7 +616,7 @@ void dev_phase2(void)
if (dev->ops && dev->ops->phase1)
{
printk(BIOS_DEBUG, "%s phase2\n", dev_path(dev));
dev->ops->phase1(dev);
dev->ops->phase2(dev);
}
}
post_code(0x4e);

101
doc/design/newboot.lyx
View file

@ -201,6 +201,107 @@ FLASH layout
\end_layout
\begin_layout Section
LinuxBIOS device structures
\end_layout
\begin_layout Subsection
Resources
\end_layout
\begin_layout Standard
Resources describe memory and I/O address ranges, IRQs, and DRQs.
They are define in include/device/resource.h.
There can be variations of a resource which include things like prefetchable,
cacheable, and so on.
\end_layout
\begin_layout Subsection
Path
\end_layout
\begin_layout Standard
A path nams a way of accessing a device.
These are defined in include/device/path.h.
The path structure is in essence a case-variant type (struct which includes
a type and a union of all possible path types).
\end_layout
\begin_layout Section
Bus
\end_layout
\begin_layout Standard
Busses, defined in include/device/device.h, connect parent devices to child
devices.
Busses are attached to a device, and have child devices attached to them.
\end_layout
\begin_layout Subsection
Devices
\end_layout
\begin_layout Standard
Devices are defined in include/device/device.h.
Devices:
\end_layout
\begin_layout Itemize
have a path
\end_layout
\begin_layout Itemize
are attached to a bus
\end_layout
\begin_layout Itemize
have sibling devices
\end_layout
\begin_layout Itemize
have a vendor and device ID
\end_layout
\begin_layout Itemize
have a class and hdr type
\end_layout
\begin_layout Itemize
have several booleans, describing state, including enabled, initialized,
resources have been read, and on the mainboard
\end_layout
\begin_layout Itemize
have a rom address, if a rom is attached to them (e.g.
VGA)
\end_layout
\begin_layout Itemize
have a set of up to MAX_RESOURCES (currently 12) resources.
The resources are built into the structure and are not dynamically allocated.
Functions to manage the resources attached to a device are found in device/devi
ce_util.c
\end_layout
\begin_layout Itemize
have links, which are usually empty in the case of everything but a bridge
\end_layout
\begin_layout Itemize
have a set of device operations -- these are per-device-type
\end_layout
\begin_layout Itemize
have a set of chip operations, per chip-type
\end_layout
\begin_layout Itemize
have a chip information structure, which is per-chip instance
\end_layout
\begin_layout Section
Boot Process
\end_layout

2
lib/stage2.c
View file

@ -50,6 +50,7 @@ it with the version available from LANL.
#include <console/console.h>
#include <console/loglevel.h>
#include <device/device.h>
#include <tables.h>
/**
* @brief Main function of the DRAM part of LinuxBIOS.
@ -102,6 +103,7 @@ int stage2(void)
dev_phase6();
post_code(0x70);
write_tables();
return 0;
}