2
* Register definitions for the Hexagon architecture
4
* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License version 2 and
8
* only version 2 as published by the Free Software Foundation.
10
* This program is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write to the Free Software
17
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21
#ifndef _ASM_REGISTERS_H
22
#define _ASM_REGISTERS_H
28
/* See kernel/entry.S for further documentation. */
31
* Entry code copies the event record out of guest registers into
32
* this structure (which is on the stack).
35
struct hvm_event_record {
36
unsigned long vmel; /* Event Linkage (return address) */
37
unsigned long vmest; /* Event context - pre-event SSR values */
38
unsigned long vmpsp; /* Previous stack pointer */
39
unsigned long vmbadva; /* Bad virtual address for addressing events */
43
long restart_r0; /* R0 checkpoint for syscall restart */
44
long syscall_nr; /* Only used in system calls */
50
long long int predsusr;
81
* Be extremely careful with rearranging these, if at all. Some code
82
* assumes the 32 registers exist exactly like this in memory;
83
* e.g. kernel/ptrace.c
84
* e.g. kernel/signal.c (restore_sigcontext)
198
/* VM dispatch pushes event record onto stack - we can build on it */
199
struct hvm_event_record hvmer;
202
/* Defines to conveniently access the values */
205
* As of the VM spec 0.5, these registers are now set/retrieved via a
206
* VM call. On the in-bound side, we just fetch the values
207
* at the entry points and stuff them into the old record in pt_regs.
208
* However, on the outbound side, probably at VM rte, we set the
212
#define pt_elr(regs) ((regs)->hvmer.vmel)
213
#define pt_set_elr(regs, val) ((regs)->hvmer.vmel = (val))
214
#define pt_cause(regs) ((regs)->hvmer.vmest & (HVM_VMEST_CAUSE_MSK))
215
#define user_mode(regs) \
216
(((regs)->hvmer.vmest & (HVM_VMEST_UM_MSK << HVM_VMEST_UM_SFT)) != 0)
217
#define ints_enabled(regs) \
218
(((regs)->hvmer.vmest & (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)) != 0)
219
#define pt_psp(regs) ((regs)->hvmer.vmpsp)
220
#define pt_badva(regs) ((regs)->hvmer.vmbadva)
222
#define pt_set_rte_sp(regs, sp) do {\
223
pt_psp(regs) = (sp);\
224
(regs)->SP = (unsigned long) &((regs)->hvmer);\
227
#define pt_set_kmode(regs) \
228
(regs)->hvmer.vmest = (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)
230
#define pt_set_usermode(regs) \
231
(regs)->hvmer.vmest = (HVM_VMEST_UM_MSK << HVM_VMEST_UM_SFT) \
232
| (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)
234
#endif /* ifndef __ASSEMBLY */