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2001-05-14 Till Straumann <strauman@slac.stanford.edu>

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* 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.
This commit is contained in:
Joel Sherrill
2002-05-14 17:10:17 +00:00
parent 3ce2907d59
commit 69ed59f083
25 changed files with 519 additions and 565 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
c/src/lib/libbsp/powerpc/shared/bootloader/misc.c
View File

@@ -233,6 +233,21 @@ void decompress_kernel(int kernel_size, void * zimage_start, int len,
codemove(bd->load_address, initrd_start, initrd_len, bd->cache_lsize);
}
static int ticks_per_ms=0;
/* this is from rtems_bsp_delay from libcpu */
void
boot_udelay(unsigned32 _microseconds)
{
unsigned32 start, ticks, now;
ticks = _microseconds * ticks_per_ms / 1000;
CPU_Get_timebase_low( start );
do {
CPU_Get_timebase_low( now );
} while (now - start < ticks);
}
void
setup_hw(void)
{
@@ -402,7 +417,7 @@ setup_hw(void)
}
break; /* Exit 'timer' loop */
}
udelay(1000); /* 1 msec */
boot_udelay(1000); /* 1 msec */
}
*cp = 0;
}