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Add system for memory mapping a block of memory from the host.

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Toby Jaffey 2025-12-11 02:36:46 +00:00
parent 8802b4c268
commit b55c2bc88a
9 changed files with 253 additions and 1 deletions
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13
uvm32/uvm32.h
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@ -55,6 +55,11 @@ typedef struct {
#define MINIRV32_DECORATE static
#define MINI_RV32_RAM_SIZE UVM32_MEMORY_SIZE
#define MINIRV32_POSTEXEC(pc, ir, retval) {if (retval > 0) return retval;}
uint32_t uvm32_extramLoad(void *userdata, uint32_t addr);
uint32_t uvm32_extramStore(void *userdata, uint32_t addr, uint32_t val);
#define MINIRV32_HANDLE_MEM_LOAD_CONTROL( addy, rval ) rval = uvm32_extramLoad(userdata, addy);
#define MINIRV32_HANDLE_MEM_STORE_CONTROL( addy, val ) if( uvm32_extramStore(userdata, addy, val) ) return val;
#ifndef MINIRV32_IMPLEMENTATION
#define MINIRV32_STEPPROTO
#endif
@ -74,6 +79,9 @@ typedef struct {
uint8_t memory[UVM32_MEMORY_SIZE];
uvm32_evt_t ioevt; // for building up in callbacks
uint8_t *stack_canary;
uint32_t extramLen;
uint32_t *extram; // all accesses are 32bit
bool extramDirty;
} uvm32_state_t;
void uvm32_init(uvm32_state_t *vmst);
@ -93,6 +101,7 @@ typedef enum {
RET
} uvm32_arg_t;
// syscall parameter handling
uint32_t uvm32_getval(uvm32_state_t *vmst, uvm32_evt_t *evt, uvm32_arg_t);
const char *uvm32_getcstr(uvm32_state_t *vmst, uvm32_evt_t *evt, uvm32_arg_t);
void uvm32_setval(uvm32_state_t *vmst, uvm32_evt_t *evt, uvm32_arg_t, uint32_t val);
@ -100,5 +109,9 @@ uvm32_evt_syscall_buf_t uvm32_getbuf(uvm32_state_t *vmst, uvm32_evt_t *evt, uvm3
uvm32_evt_syscall_buf_t uvm32_getbuf_fixed(uvm32_state_t *vmst, uvm32_evt_t *evt, uvm32_arg_t argPtr, uint32_t len);
void uvm32_clearError(uvm32_state_t *vmst);
// external RAM
void uvm32_extram(uvm32_state_t *vmst, uint32_t *ram, uint32_t len);
bool uvm32_extramDirty(uvm32_state_t *vmst); // cleared by uvm32_run()
#endif