freebsd with flexible iflib nic queues
45f8d9f9a8
Previously, ubldr would use the virtual addresses in the elf headers by masking off the high bits and assuming the result was a physical address where the kernel should be loaded. That would sometimes discard significant bits of the physical address, but the effects of that were undone by archsw copy code that would find a large block of memory and apply an offset to the source/dest copy addresses. The result was that things were loaded at a different physical address than requested by the higher code layers, but that worked because other adjustments were applied later (such as when jumping to the entry point). Very confusing, and somewhat fragile. Now the archsw copy routines are just simple copies, and instead archsw.arch_loadaddr is implemented to choose a load address. The new routine uses some of the code from the old offset-translation routine to find the largest block of ram, but it excludes ubldr itself from that range, and also excludes If ubldr splits the largest block of ram in two, the kernel is loaded into the bottom of whichever resulting block is larger. As part of eliminating ubldr itself from the ram ranges, export the heap start/end addresses in a pair of new global variables. This change means that the virtual addresses in the arm kernel elf headers now have no meaning at all, except for the entry point address. There is an implicit assumption that the entry point is in the first text page, and that the address in the the header can be turned into an offset by masking it with PAGE_MASK. In the future we can link all arm kernels at a virtual address of 0xC0000000 with no need to use any low-order part of the address to influence where in ram the kernel gets loaded. |
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| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7) and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The `buildkernel` and `installkernel` targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. Note: If you want to build and install the kernel with the `buildkernel` and `installkernel` targets, you might need to build world before. More information is available in the handbook. The kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tests Regression tests which can be run by Kyua. See tests/README for additional information. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html