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/config.h> 16 #include <linux/types.h> 17 #include <linux/pci.h> 18 #include <linux/time.h> 19 #include <asm/platform.h> 20 #include <asm/timex.h> 21 #include <asm/param.h> /* HZ */ 22 23 #define _F(r,f,a,b) \ 24 r __platform_##f a b; \ 25 r platform_##f a __attribute__((weak, alias("__platform_"#f))) 26 27 /* 28 * Default functions that are used if no platform specific function is defined. 29 * (Please, refer to include/asm-xtensa/platform.h for more information) 30 */ 31 32 _F(void, setup, (char** cmd), { }); 33 _F(void, init_irq, (void), { }); 34 _F(void, restart, (void), { while(1); }); 35 _F(void, halt, (void), { while(1); }); 36 _F(void, power_off, (void), { while(1); }); 37 _F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); }); 38 _F(void, heartbeat, (void), { }); 39 _F(int, pcibios_fixup, (void), { return 0; }); 40 _F(int, get_rtc_time, (time_t* t), { return 0; }); 41 _F(int, set_rtc_time, (time_t t), { return 0; }); 42 43 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT 44 _F(void, calibrate_ccount, (void), 45 { 46 printk ("ERROR: Cannot calibrate cpu frequency! Assuming 100MHz.\n"); 47 ccount_per_jiffy = 100 * (1000000UL/HZ); 48 }); 49 #endif 50 51