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-rw-r--r--src/devices/cpu/nios2/nios2.h62
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diff --git a/src/devices/cpu/nios2/nios2.h b/src/devices/cpu/nios2/nios2.h
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+// license:BSD-3-Clause
+// copyright-holders:AJR
+
+#ifndef MAME_CPU_NIOS2_NIOS2_H
+#define MAME_CPU_NIOS2_NIOS2_H
+
+#pragma once
+
+class nios2_device : public cpu_device
+{
+public:
+ enum {
+ NIOS2_ZERO = 0, NIOS2_AT, NIOS2_R2, NIOS2_R3, NIOS2_R4, NIOS2_R5, NIOS2_R6, NIOS2_R7,
+ NIOS2_R8, NIOS2_R9, NIOS2_R10, NIOS2_R11, NIOS2_R12, NIOS2_R13, NIOS2_R14, NIOS2_R15,
+ NIOS2_R16, NIOS2_R17, NIOS2_R18, NIOS2_R19, NIOS2_R20, NIOS2_R21, NIOS2_R22, NIOS2_R23,
+ NIOS2_ET, NIOS2_BT, NIOS2_GP, NIOS2_SP, NIOS2_FP, NIOS2_EA, NIOS2_BA, NIOS2_RA,
+ NIOS2_PC,
+ NIOS2_STATUS, NIOS2_BSTATUS, NIOS2_ESTATUS, NIOS2_IENABLE,
+ NIOS2_IPENDING, NIOS2_CPUID, NIOS2_CTLID, NIOS2_EXCEPTION,
+ NIOS2_PTEADDR, NIOS2_TLBACC, NIOS2_TLBMISC, NIOS2_ECCINJ,
+ NIOS2_BADADDR, NIOS2_CONFIG, NIOS2_MPUBASE, NIOS2_MPUACC
+ };
+
+ // construction/destruction
+ nios2_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+ // device_execute_interface overrides
+ virtual void execute_run() override;
+
+ // device_disasm_interface overrides
+ virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
+
+ // device_memory_interface overrides
+ virtual space_config_vector memory_space_config() const override;
+
+private:
+ u32 get_reg(unsigned r) const noexcept { return r == 0 ? 0 : m_gpr[r]; }
+
+ u32 read_ctl(unsigned r) const;
+ void write_ctl(unsigned r, u32 val);
+
+ // address space
+ address_space_config m_program_config;
+ memory_access<32, 2, 0, ENDIANNESS_LITTLE>::specific m_space;
+ memory_access<32, 2, 0, ENDIANNESS_LITTLE>::cache m_cache;
+
+ // internal registers
+ u32 m_gpr[32];
+ u32 m_ctl[16];
+ u32 m_pc;
+ s32 m_icount;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(NIOS2, nios2_device)
+
+#endif // MAME_CPU_NIOS2_NIOS2_H