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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2002-05-14 17:10:17 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2002-05-14 17:10:17 +0000 |
| commit | 69ed59f083a083fd96d08b5f6d54f2c80f267f03 (patch) | |
| tree | 3d8fcd08bcface88cea636117b47dd1520b2874c /c/src/lib/libbsp/powerpc/shared/startup/bspstart.c | |
| parent | 2001-05-14 Till Straumann <strauman@slac.stanford.edu> (diff) | |
| download | rtems-69ed59f083a083fd96d08b5f6d54f2c80f267f03.tar.bz2 | |
2001-05-14 Till Straumann <strauman@slac.stanford.edu>
* bootloader/misc.c, console/Makefile.am, console/console.c,
console/consoleIo.h, console/inch.c, console/polled_io.c,
console/uart.c, console/uart.h, include/bsp.h, irq/Makefile.am,
irq/irq.c, irq/irq.h, irq/irq_init.c, openpic/openpic.c,
openpic/openpic.h, pci/Makefile.am, pci/pci.c, pci/pci.h,
residual/Makefile.am, start/start.S, startup/bspstart.c,
vectors/vectors.S, vectors/vectors.h, vectors/vectors_init.c:
Per PR216, "libbsp/powerpc/shared" BSP has been modified considerably
with the goal to make it more flexible and reusable by other
BSPs. The main strategies were:
- eliminate hardcoded base addresses; devices use offsets
and a BSP defined base address.
- separate functionality into different files (e.g. reboot from
inch.c to reboot.c) which can be overridden by a 'derived' BSP.
- separate initialization code into separate files (e.g. PCI
bridge detection/initialization was separated from the more
generic PCI access routines), also to make it easier for
'derived' BSPs to substitute their own initialization code.
There are also a couple of enhancements and fixes:
- IRQ handling code now has a hook for attaching a VME bridge.
- OpenPIC is now explicitely initialized (polarities, senses).
Eliminated the implicit assumption on the presence of an ISA PIC.
- UART and console driver now supports more than 1 port. The current
maximum of 2 can easily be extended by enlarging a table (it
would even be easier if the ISR API was not broken by design).
- fixed polled_io.c so it correctly supports console on COM2
- fixed TLB invalidation code (start.S).
- exception handler prints a stack backtrace.
- added BSP_pciFindDevice() to scan the pci bus for a particular
vendor/device/instance.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/startup/bspstart.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c b/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c index 04c6f48b8d..0c0ac29382 100644 --- a/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c @@ -200,6 +200,10 @@ void bsp_start( void ) * so that It can be printed without accessing R1. */ stack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; + + /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */ + *((unsigned32 *)stack) = 0; + /* * Initialize the interrupt related settings * SPRG0 = interrupt nesting level count @@ -209,6 +213,10 @@ void bsp_start( void ) * some settings below... */ intrStack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; + + /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */ + *((unsigned32 *)intrStack) = 0; + asm volatile ("mtspr 273, %0" : "=r" (intrStack) : "0" (intrStack)); asm volatile ("mtspr 272, %0" : "=r" (intrNestingLevel) : "0" (intrNestingLevel)); /* @@ -228,7 +236,8 @@ void bsp_start( void ) * PCI devices memory area. Needed to access OPENPIC features * provided by the RAVEN */ - setdbat(2, 0xc0000000, 0xc0000000, 0x08000000, IO_PAGE); + /* T. Straumann: give more PCI address space */ + setdbat(2, 0xc0000000, 0xc0000000, 0x10000000, IO_PAGE); /* * Must have acces to open pic PCI ACK registers * provided by the RAVEN |