Update of /cvsroot/linux-vax/kernel-2.5/arch/vax/kernel/bootcons
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv18527/bootcons
Added Files:
cons_prevm_ka52.c Makefile
Log Message:
- A small start of putting boot console code into one common directory.
--- NEW FILE: cons_prevm_ka52.c ---
#include <asm/io.h>
static volatile unsigned long *ka52_console = NULL;
/*
* FIXME: This function gets "unsigned char" instead of "int". All other
* console I/O functions get int, but that looks a bit
* non-intuitive for byte I/O ...
* FIXME: 0x2004aaa8 isn't an official address. I wasn't ad hoc able to
* use the official string-printing function (see
* http://computer-refuge.org/classiccmp/dec94mds/473aamga.pdf,
* pp. B-4 ff.). This address (0x2004aaa8) is internally
* called for the purpose of printing out one byte to the
* console. Also, I was too lazy to properly check register
* usage of the subroutine, so I invalidate them all...
*/
void
ka52_prevm_putchar (unsigned char c)
{
asm (
" movzbl %0, %%r0 \n"
" jsb 0x2004aaa8 \n"
: /* nothing */
: "g"(c)
: "r0", "r1", "r2", "r3", "r4", "r5",
"r6", "r7", "r8", "r9", "r10", "r11"
/* As it seems in theory, R2, R3 and R11 are PUSHRed by this
* subroutine, so (in theory) this shouldn't needed... */
);
return;
}
void
ka52_console_init (unsigned long address)
{
ka52_console = ioremap (address, 8 * sizeof (unsigned long));
}
void
ka52_postvm_putchar (unsigned char c)
{
unsigned long temp = c;
#if 0
if (ka52_console)
ka52_console[3] = temp;
#endif
return;
}
unsigned char
ka52_prevm_getchar (void)
{
asm ("halt");
return 0;
}
--- NEW FILE: Makefile ---
#
# This Makefile handles boot console code, with either VM switched
# on or off.
#
obj-$(CONFIG_CONS_PREVM_KA52) += cons_prevm_ka52.o
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