| 42,7 → 42,9 |
|---|
| \end{enumerate} |
| |
| The following sections describe the particual features of the |
| boot loading process on the supported platforms. |
| boot loading process on the supported platforms. Sample |
| configuration files for all simulators are in the directory |
| {\em kernel/contrib/conf}. |
| |
| \section{IA-32 and AMD64} |
| |
| 50,4 → 52,80 |
|---|
| supports the Multiboot Specification (i.e. GRUB). The kernel |
| image (usually called \texttt{image.bin}) is loaded by the |
| boot loader just above the 1st megabyte of the physical |
| memory (the exact location is 1081344 bytes). |
| memory (the exact location is 1081344 bytes). Modules loaded by |
| GRUB are automatically detected by the kernel and after initialization |
| they are started as userspace tasks. The GRUB loading is the |
| easiest in terms of using userspace tasks. |
| |
| An example GRUB configuration file {\em menu.lst}: |
| \begin{verbatim} |
| title=HelenOS |
| root (cd) |
| kernel /boot/kernel.bin |
| module /boot/ns |
| module /boot/init |
| module /boot/pci |
| module /boot/fb |
| module /boot/kbd |
| module /boot/console |
| module /boot/tetris |
| module /boot/ipcc |
| module /boot/klog |
| \end{verbatim} |
| |
| \section{32-bit MIPS} |
| The MIPS port is fully supported in the {\em msim} and {\em gxemul} simulators. |
| These simulators allow specifying a memory contents of the simulated |
| computer. Unfortunately, the autodetection of loaded modules does |
| not work. In order to change number of loaded modules, the file |
| kernel/arch/mips32/src/mips32.c must be modified. |
| |
| Sample msim configuration file: |
| \begin{verbatim} |
| add dcpu mips1 |
| |
| add rwm mainmem 0x0 8M load "/dev/zero" |
| add rom startmem 0x1fc00000 1024k load "image.boot" |
| add rwm ns 0x01000000 1M load "../uspace/ns/ns" |
| add rwm kbd 0x01100000 1M load "../uspace/fb/fb" |
| add rwm fb 0x01200000 1M load "../uspace/kbd/kbd" |
| add rwm console 0x01300000 1M load "../uspace/console/console" |
| add rwm init 0x01400000 1M load "../uspace/init/init" |
| add rwm tetris 0x01500000 1M load "../uspace/tetris/tetris" |
| \end{verbatim} |
| |
| Sample gxemul command line arguments |
| \begin{verbatim} |
| gxemul -E testmips -X 0x81800000:../uspace/ns/ns 0x81900000:../uspace/kbd/kbd 0x81a00000:../uspace/fb/fb 0x81b00000:../uspace/init/init 0x81c00000:../uspace/console/console 0x81d00000:../uspace/tetris/tetris kernel.bin |
| \end{verbatim} |
| |
| The kernel can boot on the SGI Indy (and probably other SGI computers |
| with 32-bit ARC firmware). It uses ARC for output and input. When |
| the kernel is compiled to be loaded on the SGI Indy, an ECOFF image |
| is created which can be later loaded directly with ARC boot loader |
| e.g. using BOOTP protocol. |
| |
| \section{IA64} |
| The IA64 port is supported on the ski simulator. The situation is very similar |
| to the MIPS loader - the loaded modules must be loaded on correct addresses in |
| the ski configuration file and specified in the file |
| kernel/arch/ia64/src/ia64.c. |
| |
| Sample IA64 configuration file: |
| \begin{verbatim} |
| load kernel.bin |
| romload ../uspace/ns/ns 0x400000 |
| romload ../uspace/init/init 0x800000 |
| romload ../uspace/console/console 0xc00000 |
| romload ../uspace/fb/fb 0x1000000 |
| romload ../uspace/kbd/kbd 0x1400000 |
| romload ../uspace/tetris/tetris 0x1800000 |
| romload ../uspace/klog/klog 0x1c00000 |
| romload ../uspace/ipcc/ipcc 0x2000000 |
| \end{verbatim} |
| |
| \section{Power PC} |
| The PowerPC boot image contains complete kernel with user tasks. |
| The loader build system automatically creates such image using information |
| residing in boot/arch/ppc32/loader/Makefile.inc. The variable COMPONENTS |
| specifies, which tasks will be loaded into the image. |