1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * misc.c: Miscellaneous prom functions that don't belong 4*4882a593Smuzhiyun * anywhere else. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/types.h> 10*4882a593Smuzhiyun #include <linux/kernel.h> 11*4882a593Smuzhiyun #include <linux/sched.h> 12*4882a593Smuzhiyun #include <asm/sun3-head.h> 13*4882a593Smuzhiyun #include <asm/idprom.h> 14*4882a593Smuzhiyun #include <asm/openprom.h> 15*4882a593Smuzhiyun #include <asm/oplib.h> 16*4882a593Smuzhiyun #include <asm/movs.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /* Reset and reboot the machine with the command 'bcommand'. */ 19*4882a593Smuzhiyun void prom_reboot(char * bcommand)20*4882a593Smuzhiyunprom_reboot(char *bcommand) 21*4882a593Smuzhiyun { 22*4882a593Smuzhiyun unsigned long flags; 23*4882a593Smuzhiyun local_irq_save(flags); 24*4882a593Smuzhiyun (*(romvec->pv_reboot))(bcommand); 25*4882a593Smuzhiyun local_irq_restore(flags); 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* Drop into the prom, with the chance to continue with the 'go' 29*4882a593Smuzhiyun * prom command. 30*4882a593Smuzhiyun */ 31*4882a593Smuzhiyun void prom_cmdline(void)32*4882a593Smuzhiyunprom_cmdline(void) 33*4882a593Smuzhiyun { 34*4882a593Smuzhiyun } 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* Drop into the prom, but completely terminate the program. 37*4882a593Smuzhiyun * No chance of continuing. 38*4882a593Smuzhiyun */ 39*4882a593Smuzhiyun void prom_halt(void)40*4882a593Smuzhiyunprom_halt(void) 41*4882a593Smuzhiyun { 42*4882a593Smuzhiyun unsigned long flags; 43*4882a593Smuzhiyun again: 44*4882a593Smuzhiyun local_irq_save(flags); 45*4882a593Smuzhiyun (*(romvec->pv_halt))(); 46*4882a593Smuzhiyun local_irq_restore(flags); 47*4882a593Smuzhiyun goto again; /* PROM is out to get me -DaveM */ 48*4882a593Smuzhiyun } 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun typedef void (*sfunc_t)(void); 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun /* Get the idprom and stuff it into buffer 'idbuf'. Returns the 53*4882a593Smuzhiyun * format type. 'num_bytes' is the number of bytes that your idbuf 54*4882a593Smuzhiyun * has space for. Returns 0xff on error. 55*4882a593Smuzhiyun */ 56*4882a593Smuzhiyun unsigned char prom_get_idprom(char * idbuf,int num_bytes)57*4882a593Smuzhiyunprom_get_idprom(char *idbuf, int num_bytes) 58*4882a593Smuzhiyun { 59*4882a593Smuzhiyun int i, oldsfc; 60*4882a593Smuzhiyun GET_SFC(oldsfc); 61*4882a593Smuzhiyun SET_SFC(FC_CONTROL); 62*4882a593Smuzhiyun for(i=0;i<num_bytes; i++) 63*4882a593Smuzhiyun { 64*4882a593Smuzhiyun /* There is a problem with the GET_CONTROL_BYTE 65*4882a593Smuzhiyun macro; defining the extra variable 66*4882a593Smuzhiyun gets around it. 67*4882a593Smuzhiyun */ 68*4882a593Smuzhiyun int c; 69*4882a593Smuzhiyun GET_CONTROL_BYTE(SUN3_IDPROM_BASE + i, c); 70*4882a593Smuzhiyun idbuf[i] = c; 71*4882a593Smuzhiyun } 72*4882a593Smuzhiyun SET_SFC(oldsfc); 73*4882a593Smuzhiyun return idbuf[0]; 74*4882a593Smuzhiyun } 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun /* Get the major prom version number. */ 77*4882a593Smuzhiyun int prom_version(void)78*4882a593Smuzhiyunprom_version(void) 79*4882a593Smuzhiyun { 80*4882a593Smuzhiyun return romvec->pv_romvers; 81*4882a593Smuzhiyun } 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun /* Get the prom plugin-revision. */ 84*4882a593Smuzhiyun int prom_getrev(void)85*4882a593Smuzhiyunprom_getrev(void) 86*4882a593Smuzhiyun { 87*4882a593Smuzhiyun return prom_rev; 88*4882a593Smuzhiyun } 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun /* Get the prom firmware print revision. */ 91*4882a593Smuzhiyun int prom_getprev(void)92*4882a593Smuzhiyunprom_getprev(void) 93*4882a593Smuzhiyun { 94*4882a593Smuzhiyun return prom_prev; 95*4882a593Smuzhiyun } 96