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authorPeter Maydell <peter.maydell@linaro.org>2017-02-16 09:37:36 +0000
committerPeter Maydell <peter.maydell@linaro.org>2017-02-20 14:22:39 +0000
commit715004992705a44e23986fbc991e5214ed394e84 (patch)
treed239b32f436db56a6a8f07ed73fac92f434879b8 /include/hw/arm/armv7m_nvic.h
parentf814a4909feea98cc830acbe05ad6a682e779d00 (diff)
downloadqemu-arm-715004992705a44e23986fbc991e5214ed394e84.tar.gz
armv7m: Move NVICState struct definition into header
Move the NVICState struct definition into a header, so we can embed it into other QOM objects like SoCs. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/hw/arm/armv7m_nvic.h')
-rw-r--r--include/hw/arm/armv7m_nvic.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/include/hw/arm/armv7m_nvic.h b/include/hw/arm/armv7m_nvic.h
new file mode 100644
index 0000000000..39b94ee08e
--- /dev/null
+++ b/include/hw/arm/armv7m_nvic.h
@@ -0,0 +1,66 @@
+/*
+ * ARMv7M NVIC object
+ *
+ * Copyright (c) 2017 Linaro Ltd
+ * Written by Peter Maydell <peter.maydell@linaro.org>
+ *
+ * This code is licensed under the GPL version 2 or later.
+ */
+
+#ifndef HW_ARM_ARMV7M_NVIC_H
+#define HW_ARM_ARMV7M_NVIC_H
+
+#include "target/arm/cpu.h"
+#include "hw/sysbus.h"
+
+#define TYPE_NVIC "armv7m_nvic"
+
+#define NVIC(obj) \
+ OBJECT_CHECK(NVICState, (obj), TYPE_NVIC)
+
+/* Highest permitted number of exceptions (architectural limit) */
+#define NVIC_MAX_VECTORS 512
+
+typedef struct VecInfo {
+ /* Exception priorities can range from -3 to 255; only the unmodifiable
+ * priority values for RESET, NMI and HardFault can be negative.
+ */
+ int16_t prio;
+ uint8_t enabled;
+ uint8_t pending;
+ uint8_t active;
+ uint8_t level; /* exceptions <=15 never set level */
+} VecInfo;
+
+typedef struct NVICState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+ /*< public >*/
+
+ ARMCPU *cpu;
+
+ VecInfo vectors[NVIC_MAX_VECTORS];
+ uint32_t prigroup;
+
+ /* vectpending and exception_prio are both cached state that can
+ * be recalculated from the vectors[] array and the prigroup field.
+ */
+ unsigned int vectpending; /* highest prio pending enabled exception */
+ int exception_prio; /* group prio of the highest prio active exception */
+
+ struct {
+ uint32_t control;
+ uint32_t reload;
+ int64_t tick;
+ QEMUTimer *timer;
+ } systick;
+
+ MemoryRegion sysregmem;
+ MemoryRegion container;
+
+ uint32_t num_irq;
+ qemu_irq excpout;
+ qemu_irq sysresetreq;
+} NVICState;
+
+#endif