source: trunk/packages/xen-3.1/xen-3.1/xen/arch/powerpc/papr/debug.c @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 2.4 KB
Line 
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
15 *
16 * Copyright (C) IBM Corp. 2005
17 *
18 * Authors: Jimi Xenidis <jimix@watson.ibm.com>
19 */
20
21#include <xen/config.h>
22#include <xen/types.h>
23#include <xen/sched.h>
24#include <xen/init.h>
25#include <public/xen.h>
26#include <asm/current.h>
27#include <asm/papr.h>
28#include <asm/hcalls.h>
29
30#define DABR_BT (1UL << 2)
31#define DABR_DW (1UL << 1)
32#define DABR_DR (1UL << 0)
33
34#define DABRX_BT (1UL << 3)
35#define DABRX_HYP (1UL << 2)
36#define DABRX_PNH (1UL << 1)
37#define DABRX_PRO (1UL << 0)
38
39static inline int has_dabrx(void) { return 1; }
40
41static void h_set_dabr(struct cpu_user_regs *regs)
42{
43    ulong dabr = regs->gprs[4];
44
45    if (!has_dabrx()) {
46        if (!(dabr & DABR_BT)) {
47            regs->gprs[3] = H_Parameter;
48            return;
49        }
50    } else {
51        asm volatile("mtspr %0,%1" : : "I" (SPRN_DABRX), "r" (2) : "memory");
52    }
53    asm volatile("mtspr %0,%1" : : "I" (SPRN_DABR), "r" (dabr) : "memory");
54    regs->gprs[3] = H_Success;
55}
56
57static void h_set_xdabr(struct cpu_user_regs *regs)
58{
59    ulong dabr = regs->gprs[4];
60    ulong dabrx = regs->gprs[5];
61
62    if (!has_dabrx()) {
63        regs->gprs[3] = H_Function;
64        return;
65    }
66    /* make sure reserved bits are 0 */
67    if ((dabrx & ~((DABRX_BT << 1) - 1)) != 0) {
68        regs->gprs[3] = H_Parameter;
69        return;
70    }
71    if ((dabrx & DABRX_HYP) || dabrx == 0) {
72        regs->gprs[3] = H_Parameter;
73        return;
74    }
75    asm volatile("mtspr %0,%1; mtspr %2,%3"
76            : /* output */ :
77            "I" (SPRN_DABR), "r" (dabr),
78            "I" (SPRN_DABRX), "r" (dabrx) : "memory");
79
80    regs->gprs[3] = H_Success;
81}
82
83__init_papr_hcall(H_SET_DABR, h_set_dabr);
84__init_papr_hcall(H_SET_XDABR, h_set_xdabr);
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