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/types.h> 16 #include <linux/pci.h> 17 #include <linux/time.h> 18 #include <asm/platform.h> 19 #include <asm/timex.h> 20 #include <asm/param.h> /* HZ */ 21 22 #define _F(r,f,a,b) \ 23 r __platform_##f a b; \ 24 r platform_##f a __attribute__((weak, alias("__platform_"#f))) 25 26 /* 27 * Default functions that are used if no platform specific function is defined. 28 * (Please, refer to include/asm-xtensa/platform.h for more information) 29 */ 30 31 _F(void, setup, (char** cmd), { }); 32 _F(void, restart, (void), { while(1); }); 33 _F(void, halt, (void), { while(1); }); 34 _F(void, power_off, (void), { while(1); }); 35 _F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); }); 36 _F(void, heartbeat, (void), { }); 37 _F(int, pcibios_fixup, (void), { return 0; }); 38 _F(void, pcibios_init, (void), { }); 39 40 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT 41 _F(void, calibrate_ccount, (void), 42 { 43 pr_err("ERROR: Cannot calibrate cpu frequency! Assuming 10MHz.\n"); 44 ccount_freq = 10 * 1000000UL; 45 }); 46 #endif 47