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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2002-05-14 17:10:17 +0000 |
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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/vectors/vectors_init.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 '')
-rw-r--r-- | c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c b/c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c index 9a339250e2..40b360e461 100644 --- a/c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c +++ b/c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c @@ -23,6 +23,38 @@ static rtems_raw_except_connect_data exception_table[LAST_VALID_EXC + 1]; exception_handler_t globalExceptHdl; +/* T. Straumann: provide a stack trace + * <strauman@slac.stanford.edu>, 6/26/2001 + */ +typedef struct LRFrameRec_ { + struct LRFrameRec_ *frameLink; + unsigned long *lr; +} LRFrameRec, *LRFrame; + +#define STACK_CLAMP 50 /* in case we have a corrupted bottom */ + +void +BSP_printStackTrace(BSP_Exception_frame* excPtr) +{ +LRFrame f; +int i; + + printk("Stack Trace: "); + printk(" IP: 0x%08x, LR: 0x%08x\n", + excPtr->EXC_SRR0, excPtr->EXC_LR); + for (f=(LRFrame)excPtr->GPR1, i=0; f->frameLink && i<STACK_CLAMP; f=f->frameLink) { + printk("--^ 0x%08x", (long)(f->frameLink->lr)); + if (!(++i%5)) + printk("\n"); + } + if (i>=STACK_CLAMP) { + printk("Too many stack frames (stack possibly corrupted), giving up...\n"); + } else { + if (i%5) + printk("\n"); + } +} + void C_exception_handler(BSP_Exception_frame* excPtr) { int recoverable = 0; @@ -66,7 +98,10 @@ void C_exception_handler(BSP_Exception_frame* excPtr) printk("\t CTR = %x\n", excPtr->EXC_CTR); printk("\t XER = %x\n", excPtr->EXC_XER); printk("\t LR = %x\n", excPtr->EXC_LR); - printk("\t MSR = %x\n", excPtr->EXC_MSR); + printk("\t DAR = %x\n", excPtr->EXC_DAR); + + BSP_printStackTrace(excPtr); + if (excPtr->_EXC_number == ASM_DEC_VECTOR) recoverable = 1; if (excPtr->_EXC_number == ASM_SYS_VECTOR) |