| /* |
| * Copyright 2017, Data61 |
| * Commonwealth Scientific and Industrial Research Organisation (CSIRO) |
| * ABN 41 687 119 230. |
| * |
| * This software may be distributed and modified according to the terms of |
| * the BSD 2-Clause license. Note that NO WARRANTY is provided. |
| * See "LICENSE_BSD2.txt" for details. |
| * |
| * @TAG(DATA61_BSD) |
| */ |
| |
| #pragma once |
| |
| #define ps_ndelay(ns) ps_udelay((ns) / 1000 + 1) |
| #define ps_mdelay(ms) ps_udelay((ms) * 1000) |
| #define ps_sdelay(s) ps_mdelay((s) * 1000) |
| |
| /** |
| * Delay execution for at least the given number of microseconds. This is |
| * a trivial function which simply spins in a loop. The actual length of |
| * the delay depends on the current threads remaining time slice and the |
| * number and priority of other threads in the system. |
| * The use of this function should be avoided and replaced with calls to |
| * usleep(...) where possible. |
| * @param[in] us The minimum number of microseconds to delay for |
| */ |
| void ps_udelay(unsigned long us); |
| |
| /** |
| * Provide the current CPU frequency to the libplatsupport delay module. |
| * @parma[in] hz An upper bound estimate of the current cpu frequency |
| * to ensure that the delay requests to ps_udelay can be |
| * met. If this function has not yet been called, a |
| * default frequency will be used. |
| */ |
| void ps_cpufreq_hint(unsigned long hz); |
| |
