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Handle 8, 16 and 32 bit accesses to extram.

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This commit is contained in:
Toby Jaffey 2025-12-11 10:33:45 +00:00
parent 63386f9a92
commit 7a1656ab10
5 changed files with 163 additions and 12 deletions
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43
uvm32/uvm32.c
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@ -326,12 +326,34 @@ uvm32_evt_syscall_buf_t uvm32_getbuf_fixed(uvm32_state_t *vmst, uvm32_evt_t *evt
return scb;
}
uint32_t uvm32_extramLoad(void *userdata, uint32_t addr) {
uint32_t uvm32_extramLoad(void *userdata, uint32_t addr, uint32_t accessTyp) {
uvm32_state_t *vmst = (uvm32_state_t *)userdata;
addr -= UVM32_EXTRAM_BASE;
if (vmst->extram != UVM32_NULL) {
if (addr < vmst->extramLen) {
return ((uint32_t *)vmst->extram)[addr / 4];
switch(accessTyp) {
case 0:
return ((int8_t *)vmst->extram)[addr];
break;
case 1:
return ((int16_t *)vmst->extram)[addr/2];
break;
case 2:
return ((uint32_t *)vmst->extram)[addr / 4];
break;
case 4:
return ((uint8_t *)vmst->extram)[addr];
break;
case 5:
return ((uint16_t *)vmst->extram)[addr/2];
break;
default:
setStatusErr(vmst, UVM32_ERR_MEM_RD);
return 0;
break;
}
} else {
setStatusErr(vmst, UVM32_ERR_MEM_RD);
}
@ -339,12 +361,25 @@ uint32_t uvm32_extramLoad(void *userdata, uint32_t addr) {
return 0;
}
uint32_t uvm32_extramStore(void *userdata, uint32_t addr, uint32_t val ) {
uint32_t uvm32_extramStore(void *userdata, uint32_t addr, uint32_t val, uint32_t accessTyp) {
uvm32_state_t *vmst = (uvm32_state_t *)userdata;
addr -= UVM32_EXTRAM_BASE;
if (vmst->extram != UVM32_NULL) {
if (addr < vmst->extramLen) {
((uint32_t *)vmst->extram)[addr / 4] = val;
switch(accessTyp) {
case 0:
((uint8_t *)vmst->extram)[addr] = val;
break;
case 1:
((uint16_t *)vmst->extram)[addr/2] = val;
break;
case 2:
((uint32_t *)vmst->extram)[addr/4] = val;
break;
default:
setStatusErr(vmst, UVM32_ERR_MEM_WR);
break;
}
vmst->extramDirty = true;
} else {
setStatusErr(vmst, UVM32_ERR_MEM_WR);