b9303a7956
sh_bios_char_out() is not used by anything in-tree these days, so just get rid of it. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/*
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* linux/arch/sh/kernel/sh_bios.c
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* C interface for trapping into the standard LinuxSH BIOS.
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*
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* Copyright (C) 2000 Greg Banks, Mitch Davis
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*
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*/
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#include <linux/module.h>
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#include <asm/sh_bios.h>
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#define BIOS_CALL_CONSOLE_WRITE 0
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#define BIOS_CALL_ETH_NODE_ADDR 10
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#define BIOS_CALL_SHUTDOWN 11
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#define BIOS_CALL_CHAR_OUT 0x1f /* TODO: hack */
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#define BIOS_CALL_GDB_DETACH 0xff
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static inline long sh_bios_call(long func, long arg0, long arg1, long arg2,
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long arg3)
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{
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register long r0 __asm__("r0") = func;
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register long r4 __asm__("r4") = arg0;
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register long r5 __asm__("r5") = arg1;
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register long r6 __asm__("r6") = arg2;
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register long r7 __asm__("r7") = arg3;
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__asm__ __volatile__("trapa #0x3f":"=z"(r0)
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:"0"(r0), "r"(r4), "r"(r5), "r"(r6), "r"(r7)
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:"memory");
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return r0;
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}
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void sh_bios_console_write(const char *buf, unsigned int len)
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{
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sh_bios_call(BIOS_CALL_CONSOLE_WRITE, (long)buf, (long)len, 0, 0);
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}
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void sh_bios_gdb_detach(void)
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{
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sh_bios_call(BIOS_CALL_GDB_DETACH, 0, 0, 0, 0);
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}
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EXPORT_SYMBOL_GPL(sh_bios_gdb_detach);
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void sh_bios_get_node_addr(unsigned char *node_addr)
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{
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sh_bios_call(BIOS_CALL_ETH_NODE_ADDR, 0, (long)node_addr, 0, 0);
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}
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EXPORT_SYMBOL_GPL(sh_bios_get_node_addr);
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void sh_bios_shutdown(unsigned int how)
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{
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sh_bios_call(BIOS_CALL_SHUTDOWN, how, 0, 0, 0);
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}
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void *gdb_vbr_vector = NULL;
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/*
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* Read the old value of the VBR register to initialise the vector
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* through which debug and BIOS traps are delegated by the Linux trap
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* handler.
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*/
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void sh_bios_vbr_init(void)
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{
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unsigned long vbr;
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if (unlikely(gdb_vbr_vector))
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return;
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__asm__ __volatile__ ("stc vbr, %0" : "=r" (vbr));
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gdb_vbr_vector = (void *)(vbr + 0x100);
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printk(KERN_NOTICE "Setting GDB trap vector to %p\n", gdb_vbr_vector);
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}
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/**
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* sh_bios_vbr_reload - Re-load the system VBR from the BIOS vector.
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*
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* This can be used by save/restore code to reinitialize the system VBR
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* from the fixed BIOS VBR. A no-op if no BIOS VBR is known.
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*/
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void sh_bios_vbr_reload(void)
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{
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if (gdb_vbr_vector)
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__asm__ __volatile__ (
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"ldc %0, vbr"
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:
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: "r" (((unsigned long) gdb_vbr_vector) - 0x100)
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: "memory"
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);
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}
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