Add support for Pre-Boot Virtual Memory (PBVM) to the loader.
PBVM allows us to link the kernel at a fixed virtual address without
having to make any assumptions about the physical memory layout. On
the SGI Altix 350 for example, there's no usuable physical memory
below 192GB. Also, the PBVM allows us to control better where we're
going to physically load the kernel and its modules so that we can
make sure we load the kernel in memory that's close to the BSP.
The PBVM is managed by a simple page table. The minimum size of the
page table is 4KB (EFI page size) and the maximum is currently set
to 1MB. A page in the PBVM is 64KB, as that's the maximum alignment
one can specify in a linker script. The bottom line is that PBVM is
between 64KB and 8GB in size.
The loader maps the PBVM page table at a fixed virtual address and
using a single translations. The PBVM itself is also mapped using a
single translation for a maximum of 32MB.
While here, increase the heap in the EFI loader from 512KB to 2MB
and set the stage for supporting relocatable modules.
o bunch of variables are turned into uint8_t
o initial setting of namep[] in lookup() is removed
as it's only overwritten a few lines down
o kname is explicitly initialized in main() as BSS
in boot2 is not zeroed
o the setting and reading of "fmt" in load() is removed
o buf in printf() is made static to save space
Reviewed by: jhb
Tested by: me and Fabian Keil <freebsd-listen fabiankeil de>
This patch shrinks boot2 a little.
o It switches kname to be just a pointer instead of an array.
o It changes ioctl to unsigned from uint8_t.
o It changes the second keyhit limit to 3 seconds from 5.
o It removes bi_basemem/bi_extmem/bi_memsizes_valid setting.
o It switches kname to be just a pointer instead of an array
thus avoiding a couple of memcpy()s.
o It changes ioctl to unsigned from uint8_t.
o It changes the second keyhit limit to 3 seconds from 5
so that constant propagation can take place.
o It changes the ticks overflow computation as suggested by bde@.
o It removes bi_basemem/bi_extmem/bi_memsizes_valid setting from
bootinfo as it is unused.
Reviewed by: jhb
Few new things available from now on:
- Data deduplication.
- Triple parity RAIDZ (RAIDZ3).
- zfs diff.
- zpool split.
- Snapshot holds.
- zpool import -F. Allows to rewind corrupted pool to earlier
transaction group.
- Possibility to import pool in read-only mode.
MFC after: 1 month
It used to choke on the notation "inb (%dx),%al" for "inb %dx,%al"; GNU
as accepts both forms. Which notation is more 'correct' is an open
question. :)
In sys/boot/i386/boot2/boot2.c, change the type of the 'opts' variable
from uint16_t back to uint32_t. The actual option bitmasks (RB_* and
RBX_*) assume at least a 32 bit variable.
Submitted by: rdivacky
x86 CPU support, better support for powerpc64, some new directives, and
many other things. Bump __FreeBSD_version, and add a note to UPDATING.
Thanks to the many people that have helped to test this.
Obtained from: projects/binutils-2.17
on space for clang and a.out support is only needed for /boot/loader,
they are excess bytes that serve no useful purpose other than to
support really old kernels (FreeBSD < 3.2 or so). Prefer clang
support over support for these old kernels and remove this code. We
gain about 100 bytes of space this way.
Reviewed by: rdivacky@
little further. This gets us further on the way to be able to build it
successfully with clang. Using in-tree gcc, this shrinks boot2.bin with
60 bytes, the in-tree clang shaves off 72 bytes, and ToT clang 84 bytes.
Submitted by: rdivacky
Reviewed by: imp
available on firmwares 3.15 and earlier.
Caveats: Support for the internal SATA controller is currently missing,
as is support for framebuffer resolutions other than 720x480. These
deficiencies will be remedied soon.
Special thanks to Peter Grehan for providing the hardware that made this
port possible, and thanks to Geoff Levand of Sony Computer Entertainment
for advice on the LV1 hypervisor.
The controller is commonly found on DM&P Vortex86 x86 SoC. The
driver supports all hardware features except flow control. The
flow control was intentionally disabled due to silicon bug.
DM&P Electronics, Inc. provided all necessary information including
sample board to write driver and answered many questions I had.
Many thanks for their support of FreeBSD.
H/W donated by: DM&P Electronics, Inc.
much space as needed for the mode buffer. Use strcmp, relying on OF giving
back NULL terminated strings.
Submitted by: marius
Approved by: nwhitehorn (mentor)
