Add OpenRISC interrupt support.
Signed-off-by: Jia Liu <pro...@gmail.com>
---
cpu-exec.c | 17 +++++++++++++
target-openrisc/Makefile.objs | 2 +-
target-openrisc/cpu.h | 9 ++++++-
target-openrisc/helper.h | 25 +++++++++++++++++++
target-openrisc/intrpt.c | 44 +++++++++++++++++++++++++++++++++
target-openrisc/intrpt_helper.c | 52 +++++++++++++++++++++++++++++++++++++++
6 files changed, 147 insertions(+), 2 deletions(-)
create mode 100644 target-openrisc/helper.h
create mode 100644 target-openrisc/intrpt_helper.c
diff --git a/cpu-exec.c b/cpu-exec.c
index 17660bb..66af3c3 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -378,6 +378,23 @@ int cpu_exec(CPUArchState *env)
do_interrupt(env);
next_tb = 0;
}
+#elif defined(TARGET_OPENRISC)
+ {
+ int idx = -1;
+ if ((interrupt_request & CPU_INTERRUPT_HARD)
+ && (env->sr & SR_IEE)) {
+ idx = EXCP_INT;
+ }
+ if ((interrupt_request & CPU_INTERRUPT_TIMER)
+ && (env->sr & SR_TEE)) {
+ idx = EXCP_TICK;
+ }
+ if (idx >= 0) {
+ env->exception_index = idx;
+ do_interrupt(env);
+ next_tb = 0;
+ }
+ }
#elif defined(TARGET_SPARC)
if (interrupt_request & CPU_INTERRUPT_HARD) {
if (cpu_interrupts_enabled(env) &&
diff --git a/target-openrisc/Makefile.objs b/target-openrisc/Makefile.objs
index 21b76b2..65f9391 100644
--- a/target-openrisc/Makefile.objs
+++ b/target-openrisc/Makefile.objs
@@ -1,3 +1,3 @@
obj-$(CONFIG_SOFTMMU) += machine.o
obj-y += cpu.o intrpt.o mmu.o translate.o
-obj-y += mmu_helper.o
+obj-y += intrpt_helper.o mmu_helper.o
diff --git a/target-openrisc/cpu.h b/target-openrisc/cpu.h
index 4143dca..337ec1b 100644
--- a/target-openrisc/cpu.h
+++ b/target-openrisc/cpu.h
@@ -62,6 +62,10 @@ enum {
/* Internel flags, delay slot flag */
#define D_FLAG 1
+/* Interrupt */
+#define NR_IRQS 32
+#define PIC_MASK 0xFFFFFFFF
+
/* Verison Register */
#define SPR_VR 0xFFFF003F
@@ -300,6 +304,7 @@ struct CPUOpenRISCState {
uint32_t picsr; /* Interrupt contrl register*/
#endif
uint32_t feature; /* CPU Capabilities */
+ void *irq[32]; /* Interrupt irq input */
};
#define TYPE_OPENRISC_CPU "or32-cpu"
@@ -411,9 +416,11 @@ static inline int cpu_mmu_index(CPUOpenRISCState *env)
return (env->sr & SR_SM) == 0 ? MMU_USER_IDX : MMU_SUPERVISOR_IDX;
}
+#define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0
static inline bool cpu_has_work(CPUOpenRISCState *env)
{
- return true;
+ return env->interrupt_request & (CPU_INTERRUPT_HARD |
+ CPU_INTERRUPT_TIMER);
}
#include "exec-all.h"
diff --git a/target-openrisc/helper.h b/target-openrisc/helper.h
new file mode 100644
index 0000000..16d99b6
--- /dev/null
+++ b/target-openrisc/helper.h
@@ -0,0 +1,25 @@
+/*
+ * OpenRISC helper defines
+ *
+ * Copyright (c) 2011-2012 Jia Liu <pro...@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "def-helper.h"
+
+/* interrupt */
+DEF_HELPER_FLAGS_1(rfe, 0, void, env)
+
+#include "def-helper.h"
diff --git a/target-openrisc/intrpt.c b/target-openrisc/intrpt.c
index 72ee402..85f3d25 100644
--- a/target-openrisc/intrpt.c
+++ b/target-openrisc/intrpt.c
@@ -27,4 +27,48 @@
void do_interrupt(CPUOpenRISCState *env)
{
+#if !defined(CONFIG_USER_ONLY)
+ if (env->flags & D_FLAG) { /* Delay Slot insn */
+ env->flags &= ~D_FLAG;
+ env->sr |= SR_DSX;
+ if (env->exception_index == EXCP_TICK ||
+ env->exception_index == EXCP_INT ||
+ env->exception_index == EXCP_SYSCALL ||
+ env->exception_index == EXCP_FPE) {
+ env->epcr = env->jmp_pc;
+ } else {
+ env->epcr = env->pc - 4;
+ }
+ } else {
+ if (env->exception_index == EXCP_TICK ||
+ env->exception_index == EXCP_INT ||
+ env->exception_index == EXCP_SYSCALL ||
+ env->exception_index == EXCP_FPE) {
+ env->epcr = env->npc;
+ } else {
+ env->epcr = env->pc;
+ }
+ }
+
+ /* For machine-state changed between user-mode and supervisor mode,
+ we need flush TLB when we enter&exit EXCP. */
+ tlb_flush(env, 1);
+
+ env->esr = env->sr;
+ env->sr &= ~SR_DME;
+ env->sr &= ~SR_IME;
+ env->sr |= SR_SM;
+ env->sr &= ~SR_IEE;
+ env->sr &= ~SR_TEE;
+ env->tlb->map_address_data = &get_phys_nommu;
+ env->tlb->map_address_code = &get_phys_nommu;
+
+ if (env->exception_index > 0 && env->exception_index < EXCP_NR) {
+ env->pc = (env->exception_index << 8);
+ } else {
+ cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
+ }
+#endif
+
+ env->exception_index = -1;
}
diff --git a/target-openrisc/intrpt_helper.c b/target-openrisc/intrpt_helper.c
new file mode 100644
index 0000000..0e4432e
--- /dev/null
+++ b/target-openrisc/intrpt_helper.c
@@ -0,0 +1,52 @@
+/*
+ * OpenRISC interrupt helper routines
+ *
+ * Copyright (c) 2011-2012 Jia Liu <pro...@gmail.com>
+ * Feng Gao <gf91...@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "helper.h"
+
+void HELPER(rfe)(CPUOpenRISCState *env)
+{
+#if !defined(CONFIG_USER_ONLY)
+ int need_flush_tlb = (env->sr & (SR_SM | SR_IME | SR_DME)) ^
+ (env->esr & (SR_SM | SR_IME | SR_DME));
+#endif
+ env->pc = env->epcr;
+ env->npc = env->epcr;
+ env->sr = env->esr;
+
+#if !defined(CONFIG_USER_ONLY)
+ if (env->sr & SR_DME) {
+ env->tlb->map_address_data = &get_phys_data;
+ } else {
+ env->tlb->map_address_data = &get_phys_nommu;
+ }
+
+ if (env->sr & SR_IME) {
+ env->tlb->map_address_code = &get_phys_code;
+ } else {
+ env->tlb->map_address_code = &get_phys_nommu;
+ }
+
+ if (need_flush_tlb) {
+ tlb_flush(env, 1);
+ }
+#endif
+ env->interrupt_request |= CPU_INTERRUPT_EXITTB;
+}
--
1.7.9.5
