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#define READ_UINT8( _register_, _value_ ) \
((_value_) = *((volatile unsigned char *)(_register_)))
#define WRITE_UINT8( _register_, _value_ ) \
(*((volatile unsigned char *)(_register_)) = (_value_))
/* - Board specific addresses for serial chip */
#define DIAG_BASE 0xfffff300
#define DIAG_SLCR (DIAG_BASE+0x00)
#define DIAG_SLSR (DIAG_BASE+0x04)
#define DIAG_SLDICR (DIAG_BASE+0x08)
#define DIAG_SLDISR (DIAG_BASE+0x0C)
#define DIAG_SFCR (DIAG_BASE+0x10)
#define DIAG_SBRG (DIAG_BASE+0x14)
#define DIAG_TFIFO (DIAG_BASE+0x20)
#define DIAG_RFIFO (DIAG_BASE+0x30)
#define BRG_T0 0x0000
#define BRG_T2 0x0100
#define BRG_T4 0x0200
#define BRG_T5 0x0300
#define READ_UINT16( _register_, _value_ ) \
((_value_) = *((volatile unsigned short *)(_register_)))
#define WRITE_UINT16( _register_, _value_ ) \
(*((volatile unsigned short *)(_register_)) = (_value_))
unsigned char
inbyte (void)
{
unsigned char c;
unsigned short disr;
for (;;)
{
READ_UINT16 (DIAG_SLDISR, disr);
if (disr & 0x0001)
break;
}
disr = disr & ~0x0001;
READ_UINT8 (DIAG_RFIFO, c);
WRITE_UINT16 (DIAG_SLDISR, disr);
return c;
}
void
outbyte (unsigned char c)
{
unsigned short disr;
for (;;)
{
READ_UINT16 (DIAG_SLDISR, disr);
if (disr & 0x0002)
break;
}
disr = disr & ~0x0002;
WRITE_UINT8 (DIAG_TFIFO, c);
WRITE_UINT16 (DIAG_SLDISR, disr);
}
/* Stuff required to setup IO on this board */
void board_serial_init (void)
{
WRITE_UINT16 (DIAG_SLCR, 0x0020);
WRITE_UINT16 (DIAG_SLDICR, 0x0000);
WRITE_UINT16 (DIAG_SFCR, 0x0000);
WRITE_UINT16 (DIAG_SBRG, BRG_T2 | 5);
}
/* If you want this to be initialized as part of the stuff which gets called
by crt0, it should be named 'hardware_init_hook'.
Local implementations may want to move or add to this function OR
do the initializations after main() is entered.
*/
void hardware_init_hook(void)
{
board_serial_init() ;
}
/* Structure filled in by get_mem_info. Only the size field is
actually used (by sbrk), so the others aren't even filled in. */
struct s_mem
{
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
/* mem_size is provided in the linker script so that we don't have to
define it here. */
extern char _mem_size[];
void
get_mem_info (mem)
struct s_mem *mem;
{
mem->size = (unsigned int)_mem_size;
}
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