1 /* 2 * arch/xtensa/kernel/platform.c 3 * 4 * Default platform functions. 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 * 10 * Copyright (C) 2005 Tensilica Inc. 11 * 12 * Chris Zankel <chris@zankel.net> 13 */ 14 15 #include <linux/printk.h> 16 #include <linux/types.h> 17 #include <linux/units.h> 18 #include <asm/platform.h> 19 #include <asm/timex.h> 20 21 /* 22 * Default functions that are used if no platform specific function is defined. 23 * (Please, refer to arch/xtensa/include/asm/platform.h for more information) 24 */ 25 26 void __weak __init platform_init(bp_tag_t *first) 27 { 28 } 29 30 void __weak __init platform_setup(char **cmd) 31 { 32 } 33 34 void __weak platform_idle(void) 35 { 36 __asm__ __volatile__ ("waiti 0" ::: "memory"); 37 } 38 39 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT 40 void __weak platform_calibrate_ccount(void) 41 { 42 pr_err("ERROR: Cannot calibrate cpu frequency! Assuming 10 MHz.\n"); 43 ccount_freq = 10 * HZ_PER_MHZ; 44 } 45 #endif 46