L3CR_L3CLKEN
l3cr &= ~(L3CR_L3E|L3CR_L3I|L3CR_L3PE|L3CR_L3CLKEN|L3CR_RESERVED);
l3cr |= L3CR_L3CLKEN;
l3cr &= ~L3CR_L3CLKEN;
l3cr |= (L3CR_L3E|L3CR_L3CLKEN);