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kfraser@localhost.localdomain
5eeca68ffd
it to interrogate Xen version information. Also add support for HVM hypercall execution on 64-bit host. Signed-off-by: Steven Smith <ssmith@xensource.com> Signed-off-by: Keir Fraser <keir@xensource.com>
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
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* util.c: Helper library functions for HVMLoader.
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*
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* Leendert van Doorn, leendert@watson.ibm.com
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* Copyright (c) 2005, International Business Machines Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include "../acpi/acpi2_0.h" /* for ACPI_PHYSICAL_ADDRESS */
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#include "util.h"
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void outw(uint16_t addr, uint16_t val)
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{
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__asm__ __volatile__ ("outw %%ax, %%dx" :: "d"(addr), "a"(val));
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}
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void outb(uint16_t addr, uint8_t val)
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{
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__asm__ __volatile__ ("outb %%al, %%dx" :: "d"(addr), "a"(val));
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}
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uint8_t inb(uint16_t addr)
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{
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uint8_t val;
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__asm__ __volatile__ ("inb %w1,%0" : "=a" (val) : "Nd" (addr));
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return val;
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}
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char *itoa(char *a, unsigned int i)
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{
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unsigned int _i = i, x = 0;
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do {
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x++;
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_i /= 10;
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} while (_i != 0);
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a += x;
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*a-- = '\0';
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do {
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*a-- = (i % 10) + '0';
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i /= 10;
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} while (i != 0);
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return a + 1;
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}
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int strcmp(const char *cs, const char *ct)
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{
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signed char res;
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while (((res = *cs - *ct++) == 0) && (*cs++ != '\0'))
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continue;
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return res;
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}
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void *memcpy(void *dest, const void *src, unsigned n)
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{
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int t0, t1, t2;
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__asm__ __volatile__(
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"cld\n"
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"rep; movsl\n"
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"testb $2,%b4\n"
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"je 1f\n"
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"movsw\n"
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"1: testb $1,%b4\n"
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"je 2f\n"
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"movsb\n"
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"2:"
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: "=&c" (t0), "=&D" (t1), "=&S" (t2)
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: "0" (n/4), "q" (n), "1" ((long) dest), "2" ((long) src)
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: "memory"
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);
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return dest;
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}
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void puts(const char *s)
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{
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while (*s)
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outb(0xE9, *s++);
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}
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