Hi,
I needed to change some bits in a GPIO register without touching the
others, so I implemented 32 bit AND/OR. Code snippet is attached. Not
really a patch, just insert it somewhere in memcmds.cpp
--
Alistair Buxton
[email protected]
// Fill given number of words in virtual memory with given value
static void memOp(uint8 *vaddr, uint32 value, char op)
{
TRY_EXCEPTION_HANDLER {
switch (op) {
case 'A':
*(uint32*)vaddr &= value;
break;
case 'O':
*(uint32*)vaddr |= value;
break;
default:
break;
}
} CATCH_EXCEPTION_HANDLER {
Output(C_ERROR "EXCEPTION while writing %08x to address %p",
value, vaddr);
}
}
// Fill given number of words in physical memory with given value
static void memPhysOp(uint32 paddr, uint32 value, char op)
{
uint8 *vaddr = memPhysMap (paddr);
memOp (vaddr, value, op);
}
static void
cmd_memop(const char *tok, const char *x)
{
uint32 addr, value;
char op_type = toupper(tok[1]);
char addr_type = toupper(tok[0]);
if (!get_expression(&x, &addr)
|| !get_expression(&x, &value)) {
ScriptError("Expected <addr> <value>");
return;
}
switch (addr_type) {
case 'V':
memOp((uint8*)addr, value, op_type);
break;
case 'P':
memPhysOp(addr, value, op_type);
break;
}
}
REG_CMD_ALT(0, "VAND", cmd_memop, vand, 0)
REG_CMD_ALT(0, "VOR", cmd_memop, vor, 0)
REG_CMD_ALT(0, "PAND", cmd_memop, pand, 0)
REG_CMD(0, "POR", cmd_memop,
"[V|P][AND|OR] <addr> <value>\n"
" And/Or the 32 bits at given [V]irtual or [P]hysical address with a
value.")
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