1 /* 2 * linux/arch/sh/kernel/sh_bios.c 3 * C interface for trapping into the standard LinuxSH BIOS. 4 * 5 * Copyright (C) 2000 Greg Banks, Mitch Davis 6 * 7 */ 8 #include <linux/module.h> 9 #include <asm/sh_bios.h> 10 11 #define BIOS_CALL_CONSOLE_WRITE 0 12 #define BIOS_CALL_ETH_NODE_ADDR 10 13 #define BIOS_CALL_SHUTDOWN 11 14 #define BIOS_CALL_CHAR_OUT 0x1f /* TODO: hack */ 15 #define BIOS_CALL_GDB_DETACH 0xff 16 17 static inline long sh_bios_call(long func, long arg0, long arg1, long arg2, 18 long arg3) 19 { 20 register long r0 __asm__("r0") = func; 21 register long r4 __asm__("r4") = arg0; 22 register long r5 __asm__("r5") = arg1; 23 register long r6 __asm__("r6") = arg2; 24 register long r7 __asm__("r7") = arg3; 25 26 __asm__ __volatile__("trapa #0x3f":"=z"(r0) 27 :"0"(r0), "r"(r4), "r"(r5), "r"(r6), "r"(r7) 28 :"memory"); 29 return r0; 30 } 31 32 void sh_bios_console_write(const char *buf, unsigned int len) 33 { 34 sh_bios_call(BIOS_CALL_CONSOLE_WRITE, (long)buf, (long)len, 0, 0); 35 } 36 37 void sh_bios_char_out(char ch) 38 { 39 sh_bios_call(BIOS_CALL_CHAR_OUT, ch, 0, 0, 0); 40 } 41 42 void sh_bios_gdb_detach(void) 43 { 44 sh_bios_call(BIOS_CALL_GDB_DETACH, 0, 0, 0, 0); 45 } 46 EXPORT_SYMBOL_GPL(sh_bios_gdb_detach); 47 48 void sh_bios_get_node_addr(unsigned char *node_addr) 49 { 50 sh_bios_call(BIOS_CALL_ETH_NODE_ADDR, 0, (long)node_addr, 0, 0); 51 } 52 EXPORT_SYMBOL_GPL(sh_bios_get_node_addr); 53 54 void sh_bios_shutdown(unsigned int how) 55 { 56 sh_bios_call(BIOS_CALL_SHUTDOWN, how, 0, 0, 0); 57 } 58