| /* |
| * (C) Copyright 2008 |
| * Texas Instruments, <www.ti.com> |
| * |
| * Richard Woodruff <r-woodruff2@ti.com> |
| * Syed Mohammed Khasim <khasim@ti.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/io.h> |
| |
| /************************************************************ |
| * sdelay() - simple spin loop. Will be constant time as |
| * its generally used in bypass conditions only. This |
| * is necessary until timers are accessible. |
| * |
| * not inline to increase chances its in cache when called |
| *************************************************************/ |
| void sdelay(unsigned long loops) |
| { |
| __asm__ volatile ("1:\n" "subs %0, %1, #1\n" |
| "bne 1b":"=r" (loops):"0"(loops)); |
| } |
| |
| /********************************************************************* |
| * wait_on_value() - common routine to allow waiting for changes in |
| * volatile regs. |
| *********************************************************************/ |
| u32 wait_on_value(u32 read_bit_mask, u32 match_value, void *read_addr, |
| u32 bound) |
| { |
| u32 i = 0, val; |
| do { |
| ++i; |
| val = readl((u32)read_addr) & read_bit_mask; |
| if (val == match_value) |
| return 1; |
| if (i == bound) |
| return 0; |
| } while (1); |
| } |
