mirror of
https://github.com/ringtailsoftware/uvm32.git
synced 2026-06-05 22:43:39 +00:00
Rework host/target interface to use ecall and proper syscalls instead of CSRs
This commit is contained in:
Toby Jaffey
parent
a305fce466
commit
751f068486
26 changed files with 360 additions and 364 deletions
174
uvm32/uvm32.c
174
uvm32/uvm32.c
|
|
@ -66,8 +66,45 @@ bool uvm32_load(uvm32_state_t *vmst, uint8_t *rom, int len) {
|
|||
return true;
|
||||
}
|
||||
|
||||
// Read C-string up to terminator and return len,ptr
|
||||
static void get_safeptr_terminated(uvm32_state_t *vmst, uint32_t addr, uint8_t terminator, uvm32_evt_ioreq_buf_t *buf) {
|
||||
uint32_t ptrstart = addr - MINIRV32_RAM_IMAGE_OFFSET;
|
||||
uint32_t p = ptrstart;
|
||||
if (p >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
buf->ptr = NULL;
|
||||
buf->len = 0;
|
||||
return;
|
||||
}
|
||||
while(vmst->memory[p] != terminator) {
|
||||
p++;
|
||||
if (p >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
buf->ptr = NULL;
|
||||
buf->len = 0;
|
||||
return;
|
||||
}
|
||||
}
|
||||
buf->ptr = &vmst->memory[ptrstart];
|
||||
buf->len = p - ptrstart;
|
||||
}
|
||||
|
||||
#if 0
|
||||
static void get_safeptr(uvm32_state_t *vmst, uint32_t addr, uint32_t len, uvm32_evt_ioreq_buf_t *buf) {
|
||||
uint32_t ptrstart = addr - MINIRV32_RAM_IMAGE_OFFSET;
|
||||
if (ptrstart + len >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
}
|
||||
buf->ptr = &vmst->memory[ptrstart];
|
||||
buf->len = len;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter) {
|
||||
uint32_t num_instr = 0;
|
||||
// uvm32_evt_ioreq_buf_t b;
|
||||
|
||||
if (vmst->status != UVM32_STATUS_PAUSED) {
|
||||
setStatusErr(vmst, UVM32_ERR_NOTREADY);
|
||||
setup_err_evt(vmst, evt);
|
||||
|
|
@ -79,7 +116,65 @@ uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter)
|
|||
// run CPU until no longer in running state
|
||||
while(vmst->status == UVM32_STATUS_RUNNING) {
|
||||
uint64_t elapsedUs = 1;
|
||||
if (0 != MiniRV32IMAStep(vmst, vmst->core, vmst->memory, 0, elapsedUs, 1)) {
|
||||
uint32_t ret;
|
||||
ret = MiniRV32IMAStep(vmst, vmst->core, vmst->memory, 0, elapsedUs, 1);
|
||||
if (3 == ret) {
|
||||
const uint32_t syscall = vmst->core->regs[17]; // a7
|
||||
uint32_t value = vmst->core->regs[10]; // a0
|
||||
bool syscall_valid = false;
|
||||
// on exception we should jump to mtvec, but we handle directly
|
||||
// and skip over the ecall instruction
|
||||
vmst->core->pc += 4;
|
||||
switch(syscall) {
|
||||
// inbuilt syscalls
|
||||
case IOREQ_HALT:
|
||||
setStatus(vmst, UVM32_STATUS_ENDED);
|
||||
syscall_valid = true;
|
||||
break;
|
||||
case IOREQ_YIELD:
|
||||
vmst->ioevt.typ = UVM32_EVT_YIELD;
|
||||
setStatus(vmst, UVM32_STATUS_PAUSED);
|
||||
syscall_valid = true;
|
||||
break;
|
||||
|
||||
// user defined syscalls
|
||||
default:
|
||||
// search in mappings
|
||||
for (int i=0;i<vmst->numMappings;i++) {
|
||||
if (syscall == vmst->mappings[i].syscall) {
|
||||
// setup ioevt.data according to mapping typ
|
||||
switch(vmst->mappings[i].typ) {
|
||||
case IOREQ_TYP_VOID:
|
||||
break;
|
||||
case IOREQ_TYP_U32_WR:
|
||||
vmst->ioevt.data.ioreq.val.u32 = value;
|
||||
break;
|
||||
case IOREQ_TYP_BUF_TERMINATED_WR:
|
||||
get_safeptr_terminated(vmst, value, 0x00, &vmst->ioevt.data.ioreq.val.buf);
|
||||
break;
|
||||
case IOREQ_TYP_U32_RD:
|
||||
// get_safeptr(vmst, value, 4, &b);
|
||||
vmst->ioevt.data.ioreq.val.u32p = &vmst->core->regs[11]; // r1, //(uint32_t *)b.ptr;
|
||||
break;
|
||||
}
|
||||
vmst->ioevt.typ = UVM32_EVT_IOREQ;
|
||||
vmst->ioevt.data.ioreq.code = vmst->mappings[i].code;
|
||||
vmst->ioevt.data.ioreq.typ = vmst->mappings[i].typ;
|
||||
//#warning FIXME, retval
|
||||
// vmst->core->regs[11] = 456; // r1
|
||||
setStatus(vmst, UVM32_STATUS_PAUSED);
|
||||
syscall_valid = true;
|
||||
break; // stop searching
|
||||
}
|
||||
}
|
||||
// no mapping found
|
||||
if (!syscall_valid) {
|
||||
setStatusErr(vmst, UVM32_ERR_BAD_SYSCALL);
|
||||
}
|
||||
break;
|
||||
}
|
||||
} else if (ret != 0) {
|
||||
// unhandled exception
|
||||
setStatusErr(vmst, UVM32_ERR_INTERNAL_CORE);
|
||||
setup_err_evt(vmst, evt);
|
||||
}
|
||||
|
|
@ -115,83 +210,6 @@ uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter)
|
|||
}
|
||||
}
|
||||
|
||||
// Read C-string up to terminator and return len,ptr
|
||||
static void get_safeptr_terminated(uvm32_state_t *vmst, uint32_t addr, uint8_t terminator, uvm32_evt_ioreq_buf_t *buf) {
|
||||
uint32_t ptrstart = addr - MINIRV32_RAM_IMAGE_OFFSET;
|
||||
uint32_t p = ptrstart;
|
||||
if (p >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
buf->ptr = NULL;
|
||||
buf->len = 0;
|
||||
return;
|
||||
}
|
||||
while(vmst->memory[p] != terminator) {
|
||||
p++;
|
||||
if (p >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
buf->ptr = NULL;
|
||||
buf->len = 0;
|
||||
return;
|
||||
}
|
||||
}
|
||||
buf->ptr = &vmst->memory[ptrstart];
|
||||
buf->len = p - ptrstart;
|
||||
}
|
||||
|
||||
static void get_safeptr(uvm32_state_t *vmst, uint32_t addr, uint32_t len, uvm32_evt_ioreq_buf_t *buf) {
|
||||
uint32_t ptrstart = addr - MINIRV32_RAM_IMAGE_OFFSET;
|
||||
if (ptrstart + len >= UVM32_MEMORY_SIZE) {
|
||||
setStatusErr(vmst, UVM32_ERR_MEM_RD);
|
||||
}
|
||||
buf->ptr = &vmst->memory[ptrstart];
|
||||
buf->len = len;
|
||||
}
|
||||
|
||||
void uvm32_HandleOtherCSRWrite(void *userdata, uint16_t csrno, uint32_t value) {
|
||||
uvm32_evt_ioreq_buf_t b;
|
||||
uvm32_state_t *vmst = (uvm32_state_t *)userdata;
|
||||
|
||||
switch(csrno) {
|
||||
case IOREQ_HALT:
|
||||
setStatus(vmst, UVM32_STATUS_ENDED);
|
||||
break;
|
||||
case IOREQ_YIELD:
|
||||
vmst->ioevt.typ = UVM32_EVT_YIELD;
|
||||
setStatus(vmst, UVM32_STATUS_PAUSED);
|
||||
break;
|
||||
|
||||
default:
|
||||
// search in mappings
|
||||
for (int i=0;i<vmst->numMappings;i++) {
|
||||
if (csrno == vmst->mappings[i].csr) {
|
||||
// setup ioevt.data according to mapping typ
|
||||
switch(vmst->mappings[i].typ) {
|
||||
case IOREQ_TYP_VOID:
|
||||
break;
|
||||
case IOREQ_TYP_U32_WR:
|
||||
vmst->ioevt.data.ioreq.val.u32 = value;
|
||||
break;
|
||||
case IOREQ_TYP_BUF_TERMINATED_WR:
|
||||
get_safeptr_terminated(vmst, value, 0x00, &vmst->ioevt.data.ioreq.val.buf);
|
||||
break;
|
||||
case IOREQ_TYP_U32_RD:
|
||||
get_safeptr(vmst, value, 4, &b);
|
||||
vmst->ioevt.data.ioreq.val.u32p = (uint32_t *)b.ptr;
|
||||
break;
|
||||
}
|
||||
vmst->ioevt.typ = UVM32_EVT_IOREQ;
|
||||
vmst->ioevt.data.ioreq.code = vmst->mappings[i].code;
|
||||
vmst->ioevt.data.ioreq.typ = vmst->mappings[i].typ;
|
||||
setStatus(vmst, UVM32_STATUS_PAUSED);
|
||||
return;
|
||||
}
|
||||
}
|
||||
// no mapping found
|
||||
setStatusErr(vmst, UVM32_ERR_BAD_CSR);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
bool uvm32_hasEnded(const uvm32_state_t *vmst) {
|
||||
return vmst->status == UVM32_STATUS_ENDED;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -13,7 +13,7 @@
|
|||
X(UVM32_ERR_NOTREADY) \
|
||||
X(UVM32_ERR_MEM_RD) \
|
||||
X(UVM32_ERR_MEM_WR) \
|
||||
X(UVM32_ERR_BAD_CSR) \
|
||||
X(UVM32_ERR_BAD_SYSCALL) \
|
||||
X(UVM32_ERR_HUNG) \
|
||||
X(UVM32_ERR_INTERNAL_CORE) \
|
||||
X(UVM32_ERR_INTERNAL_STATE) \
|
||||
|
|
@ -40,9 +40,9 @@ typedef enum {
|
|||
|
||||
typedef uint32_t uvm32_user_ioreq_code_t;
|
||||
|
||||
// user supplied mapping from csr to typed ioreq
|
||||
// user supplied mapping from syscall to typed ioreq
|
||||
typedef struct {
|
||||
uint32_t csr;
|
||||
uint32_t syscall;
|
||||
uvm32_user_ioreq_code_t code;
|
||||
uvm32_ioreq_typ_t typ;
|
||||
} uvm32_mapping_t;
|
||||
|
|
@ -75,11 +75,9 @@ typedef struct {
|
|||
} 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
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue