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Add Arduino host sample.

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Tested on Arduino Uno (ATMega328P)
    Sketch uses 9950 bytes (30%) of program storage space. Maximum is 32256 bytes.
    Global variables use 1254 bytes (61%) of dynamic memory, leaving 794 bytes for local variables. Maximum is 2048 bytes.
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Toby Jaffey 2025-12-06 22:29:29 +00:00
parent 047c9e3853
commit 6d12ce5a80
8 changed files with 968 additions and 0 deletions
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emulator-arduino/uvm32.h Normal file
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#ifndef UVM32_H
#define UVM32_H 1
#include <stdint.h>
#include <stdbool.h>
// "well-known" system IOREQ functions
#define IOREQ_HALT 0x138
#define IOREQ_YIELD 0x139
#define LIST_OF_UVM32_ERRS \
X(UVM32_ERR_NONE) \
X(UVM32_ERR_NOTREADY) \
X(UVM32_ERR_MEM_RD) \
X(UVM32_ERR_MEM_WR) \
X(UVM32_ERR_BAD_CSR) \
X(UVM32_ERR_HUNG) \
X(UVM32_ERR_INTERNAL_CORE) \
X(UVM32_ERR_INTERNAL_STATE) \
#define X(name) name,
typedef enum {
LIST_OF_UVM32_ERRS
} uvm32_err_t;
#undef X
typedef enum {
UVM32_EVT_ERR,
UVM32_EVT_IOREQ,
UVM32_EVT_YIELD,
UVM32_EVT_END,
} uvm32_evt_typ_t;
typedef enum {
IOREQ_TYP_BUF_TERMINATED_WR, // data write from vm, NULL terminated string of bytes, in uvm32_evt_ioreq_t.val.buf
IOREQ_TYP_VOID, // no data
IOREQ_TYP_U32_WR, // data write from vm, in uvm32_evt_ioreq_t.val.u32
IOREQ_TYP_U32_RD, // data read from vm, expects response in uvm32_evt_ioreq_t.val.u32p
} uvm32_ioreq_typ_t;
typedef uint32_t uvm32_user_ioreq_code_t;
// user supplied mapping from csr to typed ioreq
typedef struct {
uint32_t csr;
uvm32_user_ioreq_code_t code;
uvm32_ioreq_typ_t typ;
} uvm32_mapping_t;
typedef struct {
uint8_t *ptr;
uint32_t len;
} uvm32_evt_ioreq_buf_t;
typedef struct {
uvm32_ioreq_typ_t typ;
uvm32_user_ioreq_code_t code;
union {
uvm32_evt_ioreq_buf_t buf;
uint32_t u32;
uint32_t *u32p;
} val;
} uvm32_evt_ioreq_t;
typedef struct {
uvm32_err_t errcode;
const char *errstr;
} uvm32_evt_err_t;
typedef struct {
uvm32_evt_typ_t typ;
union {
uvm32_evt_ioreq_t ioreq;
uvm32_evt_err_t err;
} data;
} uvm32_evt_t;
void uvm32_HandleOtherCSRWrite(void *userdata, uint16_t csrno, uint32_t value);
#define MINIRV32_DECORATE static
#define MINI_RV32_RAM_SIZE UVM32_MEMORY_SIZE
#define MINIRV32_POSTEXEC(pc, ir, retval) {if (retval > 0) return 3;}
#define MINIRV32_OTHERCSR_WRITE(csrno, value) uvm32_HandleOtherCSRWrite(userdata, csrno, value);
#ifndef MINIRV32_IMPLEMENTATION
#define MINIRV32_STEPPROTO
#endif
#include "mini-rv32ima.h"
typedef enum {
UVM32_STATUS_PAUSED,
UVM32_STATUS_RUNNING,
UVM32_STATUS_ERROR,
UVM32_STATUS_ENDED,
} uvm32_status_t;
typedef struct {
uvm32_status_t status;
uvm32_err_t err;
struct MiniRV32IMAState* core; // points at end of memory
uint8_t memory[UVM32_MEMORY_SIZE];
uvm32_evt_t ioevt; // for building up in callbacks
const uvm32_mapping_t *mappings;
uint32_t numMappings;
} uvm32_state_t;
void uvm32_init(uvm32_state_t *vmst, const uvm32_mapping_t *mappings, uint32_t numMappings);
bool uvm32_load(uvm32_state_t *vmst, uint8_t *rom, int len);
bool uvm32_hasEnded(const uvm32_state_t *vmst);
uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter);
#endif