![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
|
|
* linux/arch/sh/kernel/sh_bios.c
|
|
* C interface for trapping into the standard LinuxSH BIOS.
|
|
*
|
|
* Copyright (C) 2000 Greg Banks, Mitch Davis
|
|
*
|
|
*/
|
|
|
|
#include <asm/sh_bios.h>
|
|
|
|
#define BIOS_CALL_CONSOLE_WRITE 0
|
|
#define BIOS_CALL_READ_BLOCK 1
|
|
#define BIOS_CALL_ETH_NODE_ADDR 10
|
|
#define BIOS_CALL_SHUTDOWN 11
|
|
#define BIOS_CALL_CHAR_OUT 0x1f /* TODO: hack */
|
|
#define BIOS_CALL_GDB_GET_MODE_PTR 0xfe
|
|
#define BIOS_CALL_GDB_DETACH 0xff
|
|
|
|
static __inline__ long sh_bios_call(long func, long arg0, long arg1, long arg2, long arg3)
|
|
{
|
|
register long r0 __asm__("r0") = func;
|
|
register long r4 __asm__("r4") = arg0;
|
|
register long r5 __asm__("r5") = arg1;
|
|
register long r6 __asm__("r6") = arg2;
|
|
register long r7 __asm__("r7") = arg3;
|
|
__asm__ __volatile__("trapa #0x3f"
|
|
: "=z" (r0)
|
|
: "0" (r0), "r" (r4), "r" (r5), "r" (r6), "r" (r7)
|
|
: "memory");
|
|
return r0;
|
|
}
|
|
|
|
|
|
void sh_bios_console_write(const char *buf, unsigned int len)
|
|
{
|
|
sh_bios_call(BIOS_CALL_CONSOLE_WRITE, (long)buf, (long)len, 0, 0);
|
|
}
|
|
|
|
|
|
void sh_bios_char_out(char ch)
|
|
{
|
|
sh_bios_call(BIOS_CALL_CHAR_OUT, ch, 0, 0, 0);
|
|
}
|
|
|
|
|
|
int sh_bios_in_gdb_mode(void)
|
|
{
|
|
static char queried = 0;
|
|
static char *gdb_mode_p = 0;
|
|
|
|
if (!queried)
|
|
{
|
|
/* Query the gdb stub for address of its gdb mode variable */
|
|
long r = sh_bios_call(BIOS_CALL_GDB_GET_MODE_PTR, 0, 0, 0, 0);
|
|
if (r != ~0) /* BIOS returns -1 for unknown function */
|
|
gdb_mode_p = (char *)r;
|
|
queried = 1;
|
|
}
|
|
return (gdb_mode_p != 0 ? *gdb_mode_p : 0);
|
|
}
|
|
|
|
void sh_bios_gdb_detach(void)
|
|
{
|
|
sh_bios_call(BIOS_CALL_GDB_DETACH, 0, 0, 0, 0);
|
|
}
|
|
|
|
void sh_bios_get_node_addr (unsigned char *node_addr)
|
|
{
|
|
sh_bios_call(BIOS_CALL_ETH_NODE_ADDR, 0, (long)node_addr, 0, 0);
|
|
}
|
|
|
|
void sh_bios_shutdown(unsigned int how)
|
|
{
|
|
sh_bios_call(BIOS_CALL_SHUTDOWN, how, 0, 0, 0);
|
|
}
|