mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
132 lines
3.9 KiB
ArmAsm
132 lines
3.9 KiB
ArmAsm
|
/*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License, version 2, as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
|
|
*
|
||
|
|
* Copyright SUSE Linux Products GmbH 2009
|
||
|
|
*
|
||
|
|
* Authors: Alexander Graf <agraf@suse.de>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <asm/ppc_asm.h>
|
||
|
|
#include <asm/kvm_asm.h>
|
||
|
|
#include <asm/reg.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
#include <asm/asm-offsets.h>
|
||
|
|
#include <asm/exception-64s.h>
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
* *
|
||
|
|
* Real Mode handlers that need to be in low physical memory *
|
||
|
|
* *
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
.macro INTERRUPT_TRAMPOLINE intno
|
||
|
|
|
||
|
|
.global kvmppc_trampoline_\intno
|
||
|
|
kvmppc_trampoline_\intno:
|
||
|
|
|
||
|
|
mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* First thing to do is to find out if we're coming
|
||
|
|
* from a KVM guest or a Linux process.
|
||
|
|
*
|
||
|
|
* To distinguish, we check a magic byte in the PACA
|
||
|
|
*/
|
||
|
|
mfspr r13, SPRN_SPRG_PACA /* r13 = PACA */
|
||
|
|
std r12, (PACA_EXMC + EX_R12)(r13)
|
||
|
|
mfcr r12
|
||
|
|
stw r12, (PACA_EXMC + EX_CCR)(r13)
|
||
|
|
lbz r12, PACA_KVM_IN_GUEST(r13)
|
||
|
|
cmpwi r12, 0
|
||
|
|
bne ..kvmppc_handler_hasmagic_\intno
|
||
|
|
/* No KVM guest? Then jump back to the Linux handler! */
|
||
|
|
lwz r12, (PACA_EXMC + EX_CCR)(r13)
|
||
|
|
mtcr r12
|
||
|
|
ld r12, (PACA_EXMC + EX_R12)(r13)
|
||
|
|
mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */
|
||
|
|
b kvmppc_resume_\intno /* Get back original handler */
|
||
|
|
|
||
|
|
/* Now we know we're handling a KVM guest */
|
||
|
|
..kvmppc_handler_hasmagic_\intno:
|
||
|
|
/* Unset guest state */
|
||
|
|
li r12, 0
|
||
|
|
stb r12, PACA_KVM_IN_GUEST(r13)
|
||
|
|
|
||
|
|
std r1, (PACA_EXMC+EX_R9)(r13)
|
||
|
|
std r10, (PACA_EXMC+EX_R10)(r13)
|
||
|
|
std r11, (PACA_EXMC+EX_R11)(r13)
|
||
|
|
std r2, (PACA_EXMC+EX_R13)(r13)
|
||
|
|
|
||
|
|
mfsrr0 r10
|
||
|
|
mfsrr1 r11
|
||
|
|
|
||
|
|
/* Restore R1/R2 so we can handle faults */
|
||
|
|
ld r1, PACAR1(r13)
|
||
|
|
ld r2, (PACA_EXMC+EX_SRR0)(r13)
|
||
|
|
|
||
|
|
/* Let's store which interrupt we're handling */
|
||
|
|
li r12, \intno
|
||
|
|
|
||
|
|
/* Jump into the SLB exit code that goes to the highmem handler */
|
||
|
|
b kvmppc_handler_trampoline_exit
|
||
|
|
|
||
|
|
.endm
|
||
|
|
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSTEM_RESET
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DECREMENTER
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSCALL
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC
|
||
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This trampoline brings us back to a real mode handler
|
||
|
|
*
|
||
|
|
* Input Registers:
|
||
|
|
*
|
||
|
|
* R6 = SRR0
|
||
|
|
* R7 = SRR1
|
||
|
|
* LR = real-mode IP
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
.global kvmppc_handler_lowmem_trampoline
|
||
|
|
kvmppc_handler_lowmem_trampoline:
|
||
|
|
|
||
|
|
mtsrr0 r6
|
||
|
|
mtsrr1 r7
|
||
|
|
blr
|
||
|
|
kvmppc_handler_lowmem_trampoline_end:
|
||
|
|
|
||
|
|
.global kvmppc_trampoline_lowmem
|
||
|
|
kvmppc_trampoline_lowmem:
|
||
|
|
.long kvmppc_handler_lowmem_trampoline - _stext
|
||
|
|
|
||
|
|
.global kvmppc_trampoline_enter
|
||
|
|
kvmppc_trampoline_enter:
|
||
|
|
.long kvmppc_handler_trampoline_enter - _stext
|
||
|
|
|
||
|
|
#include "book3s_64_slb.S"
|
||
|
|
|