MCP_REG_MCPR_ACCESS_LOCK
if (MCPR_ACCESS_LOCK_LOCK & REG_RD(bp, MCP_REG_MCPR_ACCESS_LOCK)) {
REG_WR(bp, MCP_REG_MCPR_ACCESS_LOCK, MCPR_ACCESS_LOCK_LOCK);
val = REG_RD(bp, MCP_REG_MCPR_ACCESS_LOCK);
REG_WR(bp, MCP_REG_MCPR_ACCESS_LOCK, 0);