The Fed's long-time liquidity tool is the discount window, by which banks can post collateral, priced at market value, and obtain loans for up to 90 days.
On March 12, the Fed created an additional lending tool, with the approval of the Secretary of the Treasury, called the Bank Term Funding Program (BTFP), which accepts U.S. government securities collateral at par value with no haircuts for loans with maturities  1/4  BIS - Central bankers' speeches  up to a year.