/****************************************************************************
|
/****************************************************************************
|
|
|
THIS SOFTWARE IS NOT COPYRIGHTED
|
THIS SOFTWARE IS NOT COPYRIGHTED
|
|
|
HP offers the following for use in the public domain. HP makes no
|
HP offers the following for use in the public domain. HP makes no
|
warranty with regard to the software or it's performance and the
|
warranty with regard to the software or it's performance and the
|
user accepts the software "AS IS" with all faults.
|
user accepts the software "AS IS" with all faults.
|
|
|
HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
|
HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
|
TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
****************************************************************************/
|
****************************************************************************/
|
|
|
/****************************************************************************
|
/****************************************************************************
|
* Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
|
* Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
|
*
|
*
|
* Module name: remcom.c $
|
* Module name: remcom.c $
|
* Revision: 1.34 $
|
* Revision: 1.34 $
|
* Date: 91/03/09 12:29:49 $
|
* Date: 91/03/09 12:29:49 $
|
* Contributor: Lake Stevens Instrument Division$
|
* Contributor: Lake Stevens Instrument Division$
|
*
|
*
|
* Description: low level support for gdb debugger. $
|
* Description: low level support for gdb debugger. $
|
*
|
*
|
* Considerations: only works on target hardware $
|
* Considerations: only works on target hardware $
|
*
|
*
|
* Written by: Glenn Engel $
|
* Written by: Glenn Engel $
|
* ModuleState: Experimental $
|
* ModuleState: Experimental $
|
*
|
*
|
* NOTES: See Below $
|
* NOTES: See Below $
|
*
|
*
|
* Heavily modified for XStormy16 by Mark Salter, Red Hat.
|
* Heavily modified for XStormy16 by Mark Salter, Red Hat.
|
* Optimisations and 'X' support by Geoff Keating, Red Hat.
|
* Optimisations and 'X' support by Geoff Keating, Red Hat.
|
*
|
*
|
* To enable debugger support, two things need to happen. One, a
|
* To enable debugger support, two things need to happen. One, a
|
* call to set_debug_traps() is necessary in order to allow any breakpoints
|
* call to set_debug_traps() is necessary in order to allow any breakpoints
|
* or error conditions to be properly intercepted and reported to gdb.
|
* or error conditions to be properly intercepted and reported to gdb.
|
* Two, a breakpoint needs to be generated to begin communication. This
|
* Two, a breakpoint needs to be generated to begin communication. This
|
* is most easily accomplished by a call to breakpoint(). Breakpoint()
|
* is most easily accomplished by a call to breakpoint(). Breakpoint()
|
* simulates a breakpoint by executing a trap #1.
|
* simulates a breakpoint by executing a trap #1.
|
*
|
*
|
* Because gdb will sometimes write to the stack area to execute function
|
* Because gdb will sometimes write to the stack area to execute function
|
* calls, this program cannot rely on using the inferior stack so it uses
|
* calls, this program cannot rely on using the inferior stack so it uses
|
* it's own stack area.
|
* it's own stack area.
|
*
|
*
|
*************
|
*************
|
*
|
*
|
* The following gdb commands are supported:
|
* The following gdb commands are supported:
|
*
|
*
|
* command function Return value
|
* command function Return value
|
*
|
*
|
* g return the value of the CPU registers hex data or ENN
|
* g return the value of the CPU registers hex data or ENN
|
* G set the value of the CPU registers OK or ENN
|
* G set the value of the CPU registers OK or ENN
|
*
|
*
|
* mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
|
* mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
|
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
|
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
|
* XAA..AA,LLLL: Write LLLL binary bytes at address OK or ENN
|
* XAA..AA,LLLL: Write LLLL binary bytes at address OK or ENN
|
* AA..AA
|
* AA..AA
|
*
|
*
|
* c Resume at current address SNN ( signal NN)
|
* c Resume at current address SNN ( signal NN)
|
* cAA..AA Continue at address AA..AA SNN
|
* cAA..AA Continue at address AA..AA SNN
|
*
|
*
|
* s Step one instruction SNN
|
* s Step one instruction SNN
|
* sAA..AA Step one instruction from AA..AA SNN
|
* sAA..AA Step one instruction from AA..AA SNN
|
*
|
*
|
* k kill
|
* k kill
|
*
|
*
|
* ? What was the last sigval ? SNN (signal NN)
|
* ? What was the last sigval ? SNN (signal NN)
|
*
|
*
|
* All commands and responses are sent with a packet which includes a
|
* All commands and responses are sent with a packet which includes a
|
* checksum. A packet consists of
|
* checksum. A packet consists of
|
*
|
*
|
* $<packet info>#<checksum>.
|
* $<packet info>#<checksum>.
|
*
|
*
|
* where
|
* where
|
* <packet info> :: <characters representing the command or response>
|
* <packet info> :: <characters representing the command or response>
|
* <checksum> :: <two hex digits computed as modulo 256 sum of <packetinfo>>
|
* <checksum> :: <two hex digits computed as modulo 256 sum of <packetinfo>>
|
*
|
*
|
* When a packet is received, it is first acknowledged with either '+' or '-'.
|
* When a packet is received, it is first acknowledged with either '+' or '-'.
|
* '+' indicates a successful transfer. '-' indicates a failed transfer.
|
* '+' indicates a successful transfer. '-' indicates a failed transfer.
|
*
|
*
|
* Example:
|
* Example:
|
*
|
*
|
* Host: Reply:
|
* Host: Reply:
|
* $m0,10#2a +$00010203040506070809101112131415#42
|
* $m0,10#2a +$00010203040506070809101112131415#42
|
*
|
*
|
****************************************************************************/
|
****************************************************************************/
|
|
|
/* Local functions:
|
/* Local functions:
|
*/
|
*/
|
static void putDebugChar(unsigned ch);
|
static void putDebugChar(unsigned ch);
|
static unsigned char getDebugChar(void);
|
static unsigned char getDebugChar(void);
|
static void putPacket(unsigned char *);
|
static void putPacket(unsigned char *);
|
static void putHex (char c, unsigned long mem_arg, int count);
|
static void putHex (char c, unsigned long mem_arg, int count);
|
static unsigned char *getpacket(void);
|
static unsigned char *getpacket(void);
|
static void hex2mem(unsigned char *, unsigned long, int);
|
static void hex2mem(unsigned char *, unsigned long, int);
|
static int valid_addr_range (unsigned long mem, int count);
|
static int valid_addr_range (unsigned long mem, int count);
|
static int hexToInt(unsigned char **, long *);
|
static int hexToInt(unsigned char **, long *);
|
static void prepare_to_step(void);
|
static void prepare_to_step(void);
|
static void finish_from_step(void);
|
static void finish_from_step(void);
|
|
|
/* breakpoint opcode */
|
/* breakpoint opcode */
|
#define BREAKPOINT_OPCODE 0x0006
|
#define BREAKPOINT_OPCODE 0x0006
|
|
|
/* Error Detection Register */
|
/* Error Detection Register */
|
#define ERR_DETECT_REG (*(volatile unsigned *)0x7f08)
|
#define ERR_DETECT_REG (*(volatile unsigned *)0x7f08)
|
#define UNDEF_INSN_ENA 0x01
|
#define UNDEF_INSN_ENA 0x01
|
#define UNDEF_INSN_FLAG 0x02
|
#define UNDEF_INSN_FLAG 0x02
|
#define ODD_ADDR_ENA 0x04
|
#define ODD_ADDR_ENA 0x04
|
#define ODD_ADDR_FLAG 0x08
|
#define ODD_ADDR_FLAG 0x08
|
#define BAD_ADDR_ENA 0x10
|
#define BAD_ADDR_ENA 0x10
|
#define BAD_ADDR_FLAG 0x20
|
#define BAD_ADDR_FLAG 0x20
|
#define SER0_IRQ_ENA 0x1000
|
#define SER0_IRQ_ENA 0x1000
|
#define SER0_IRQ_FLAG 0x2000
|
#define SER0_IRQ_FLAG 0x2000
|
|
|
/*****************************************************************************
|
/*****************************************************************************
|
* BUFMAX defines the maximum number of characters in inbound/outbound buffers
|
* BUFMAX defines the maximum number of characters in inbound/outbound buffers
|
* at least NUMREGBYTES*2 are needed for register packets
|
* at least NUMREGBYTES*2 are needed for register packets
|
*/
|
*/
|
#define BUFMAX 80
|
#define BUFMAX 80
|
|
|
static const unsigned char hexchars[]="0123456789abcdef";
|
static const unsigned char hexchars[]="0123456789abcdef";
|
|
|
#define NUMREGS 17
|
#define NUMREGS 17
|
|
|
/* Number of bytes of registers (extra 2 bytes is for 4 byte PC). */
|
/* Number of bytes of registers (extra 2 bytes is for 4 byte PC). */
|
#define NUMREGBYTES ((NUMREGS * 2) + 2)
|
#define NUMREGBYTES ((NUMREGS * 2) + 2)
|
enum regnames { R0, R1, R2, R3, R4, R5, R6, R7,
|
enum regnames { R0, R1, R2, R3, R4, R5, R6, R7,
|
R8, R9, R10, R11, R12, R13, R14, R15,
|
R8, R9, R10, R11, R12, R13, R14, R15,
|
PC };
|
PC };
|
|
|
#define FP R13
|
#define FP R13
|
#define PSW R14
|
#define PSW R14
|
#define SP R15
|
#define SP R15
|
|
|
struct regs {
|
struct regs {
|
int r[16];
|
int r[16];
|
long pc;
|
long pc;
|
} registers;
|
} registers;
|
|
|
static struct regs orig_registers;
|
static struct regs orig_registers;
|
|
|
static unsigned char remcomBuffer[BUFMAX];
|
static unsigned char remcomBuffer[BUFMAX];
|
|
|
/* Indicate whether inferior is running. Used to decide whether or not to
|
/* Indicate whether inferior is running. Used to decide whether or not to
|
send T packet when stub is entered. */
|
send T packet when stub is entered. */
|
static char is_running;
|
static char is_running;
|
|
|
static inline unsigned char
|
static inline unsigned char
|
get_char(unsigned long addr)
|
get_char(unsigned long addr)
|
{
|
{
|
unsigned int msw, lsw;
|
unsigned int msw, lsw;
|
unsigned char ret;
|
unsigned char ret;
|
|
|
msw = addr >> 16;
|
msw = addr >> 16;
|
lsw = addr & 0xffff;
|
lsw = addr & 0xffff;
|
|
|
asm("movf.b %0,(%2)\n"
|
asm("movf.b %0,(%2)\n"
|
: "=e"(ret) : "d"(msw), "r"(lsw) : "memory");
|
: "=e"(ret) : "d"(msw), "r"(lsw) : "memory");
|
|
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static inline void
|
static inline void
|
set_char(unsigned long addr, unsigned int val)
|
set_char(unsigned long addr, unsigned int val)
|
{
|
{
|
unsigned int msw, lsw;
|
unsigned int msw, lsw;
|
|
|
msw = addr >> 16;
|
msw = addr >> 16;
|
lsw = addr & 0xffff;
|
lsw = addr & 0xffff;
|
|
|
asm("movf.b (%1),%2\n"
|
asm("movf.b (%1),%2\n"
|
: /* none */ : "d"(msw), "r"(lsw), "e"(val) : "memory" );
|
: /* none */ : "d"(msw), "r"(lsw), "e"(val) : "memory" );
|
}
|
}
|
|
|
static inline unsigned int
|
static inline unsigned int
|
get_word(unsigned long addr)
|
get_word(unsigned long addr)
|
{
|
{
|
unsigned int ret, msw, lsw;
|
unsigned int ret, msw, lsw;
|
|
|
msw = addr >> 16;
|
msw = addr >> 16;
|
lsw = addr & 0xffff;
|
lsw = addr & 0xffff;
|
|
|
asm("movf.w %0,(%2)\n"
|
asm("movf.w %0,(%2)\n"
|
: "=e"(ret) : "d"(msw), "r"(lsw) : "memory" );
|
: "=e"(ret) : "d"(msw), "r"(lsw) : "memory" );
|
|
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static inline void
|
static inline void
|
set_word(unsigned long addr, unsigned int val)
|
set_word(unsigned long addr, unsigned int val)
|
{
|
{
|
unsigned int msw, lsw;
|
unsigned int msw, lsw;
|
|
|
msw = addr >> 16;
|
msw = addr >> 16;
|
lsw = addr & 0xffff;
|
lsw = addr & 0xffff;
|
|
|
asm("movf.w (%1),%2\n"
|
asm("movf.w (%1),%2\n"
|
: /* none */ : "d"(msw), "r"(lsw), "e"(val) : "memory" );
|
: /* none */ : "d"(msw), "r"(lsw), "e"(val) : "memory" );
|
}
|
}
|
|
|
static void
|
static void
|
assign_regs (struct regs *dest, const struct regs *src)
|
assign_regs (struct regs *dest, const struct regs *src)
|
{
|
{
|
int i;
|
int i;
|
char *d = (char *)dest, *s = (char *)src;
|
char *d = (char *)dest, *s = (char *)src;
|
for (i = 0; i < sizeof (struct regs); i++)
|
for (i = 0; i < sizeof (struct regs); i++)
|
*d++ = *s++;
|
*d++ = *s++;
|
}
|
}
|
|
|
/* Write out a register for a 'T' packet. */
|
/* Write out a register for a 'T' packet. */
|
|
|
static unsigned char *
|
static unsigned char *
|
putreg (unsigned char *buf, int regnum, void *mem_p, int count)
|
putreg (unsigned char *buf, int regnum, void *mem_p, int count)
|
{
|
{
|
int i;
|
int i;
|
unsigned char ch;
|
unsigned char ch;
|
char *mem = (char *)mem_p;
|
char *mem = (char *)mem_p;
|
|
|
*buf++ = hexchars[regnum >> 4];
|
*buf++ = hexchars[regnum >> 4];
|
*buf++ = hexchars[regnum % 16];
|
*buf++ = hexchars[regnum % 16];
|
*buf++ = ':';
|
*buf++ = ':';
|
|
|
for (i=0;i<count;i++)
|
for (i=0;i<count;i++)
|
{
|
{
|
ch = *mem++;
|
ch = *mem++;
|
*buf++ = hexchars[ch >> 4];
|
*buf++ = hexchars[ch >> 4];
|
*buf++ = hexchars[ch % 16];
|
*buf++ = hexchars[ch % 16];
|
}
|
}
|
*buf++ = ';';
|
*buf++ = ';';
|
return(buf);
|
return(buf);
|
}
|
}
|
|
|
/*
|
/*
|
* This function does all command procesing for interfacing to gdb.
|
* This function does all command procesing for interfacing to gdb.
|
*/
|
*/
|
void
|
void
|
handle_exception(void)
|
handle_exception(void)
|
{
|
{
|
char sigval;
|
char sigval;
|
unsigned char *ptr;
|
unsigned char *ptr;
|
long addr, length;
|
long addr, length;
|
|
|
/* reply to host that an exception has occurred */
|
/* reply to host that an exception has occurred */
|
sigval = 5; /* SIGTRAP is default */
|
sigval = 5; /* SIGTRAP is default */
|
if (ERR_DETECT_REG & UNDEF_INSN_FLAG)
|
if (ERR_DETECT_REG & UNDEF_INSN_FLAG)
|
{
|
{
|
ERR_DETECT_REG &= ~UNDEF_INSN_FLAG;
|
ERR_DETECT_REG &= ~UNDEF_INSN_FLAG;
|
registers.pc -= 2;
|
registers.pc -= 2;
|
if (get_word(registers.pc) != BREAKPOINT_OPCODE)
|
if (get_word(registers.pc) != BREAKPOINT_OPCODE)
|
sigval = 4; /* SIGILL */
|
sigval = 4; /* SIGILL */
|
}
|
}
|
if (ERR_DETECT_REG & BAD_ADDR_FLAG)
|
if (ERR_DETECT_REG & BAD_ADDR_FLAG)
|
{
|
{
|
ERR_DETECT_REG &= ~BAD_ADDR_FLAG;
|
ERR_DETECT_REG &= ~BAD_ADDR_FLAG;
|
sigval = 11; /* SIGSEGV */
|
sigval = 11; /* SIGSEGV */
|
}
|
}
|
if (ERR_DETECT_REG & SER0_IRQ_FLAG)
|
if (ERR_DETECT_REG & SER0_IRQ_FLAG)
|
{
|
{
|
unsigned char ch;
|
unsigned char ch;
|
|
|
ch = getDebugChar();
|
ch = getDebugChar();
|
ERR_DETECT_REG &= ~SER0_IRQ_FLAG;
|
ERR_DETECT_REG &= ~SER0_IRQ_FLAG;
|
if (ch != 0x03)
|
if (ch != 0x03)
|
return;
|
return;
|
sigval = 2; /* SIGINT */
|
sigval = 2; /* SIGINT */
|
}
|
}
|
|
|
finish_from_step();
|
finish_from_step();
|
|
|
/* save original context so it can be restored as a result of
|
/* save original context so it can be restored as a result of
|
a kill packet. */
|
a kill packet. */
|
if (orig_registers.pc == 0L)
|
if (orig_registers.pc == 0L)
|
assign_regs (&orig_registers, ®isters);
|
assign_regs (&orig_registers, ®isters);
|
|
|
if (is_running)
|
if (is_running)
|
{
|
{
|
ptr = remcomBuffer;
|
ptr = remcomBuffer;
|
|
|
*ptr++ = 'T'; /* notify gdb with signo, PC, FP and SP */
|
*ptr++ = 'T'; /* notify gdb with signo, PC, FP and SP */
|
*ptr++ = hexchars[sigval >> 4];
|
*ptr++ = hexchars[sigval >> 4];
|
*ptr++ = hexchars[sigval & 0xf];
|
*ptr++ = hexchars[sigval & 0xf];
|
|
|
ptr = putreg (ptr, PC, ®isters.pc, 4);
|
ptr = putreg (ptr, PC, ®isters.pc, 4);
|
ptr = putreg (ptr, FP, ®isters.r[FP], 2);
|
ptr = putreg (ptr, FP, ®isters.r[FP], 2);
|
ptr = putreg (ptr, SP, ®isters.r[SP], 2);
|
ptr = putreg (ptr, SP, ®isters.r[SP], 2);
|
|
|
*ptr++ = 0;
|
*ptr++ = 0;
|
|
|
putPacket(remcomBuffer);
|
putPacket(remcomBuffer);
|
}
|
}
|
|
|
while (1) {
|
while (1) {
|
char kind;
|
char kind;
|
|
|
ptr = getpacket();
|
ptr = getpacket();
|
kind = *ptr++;
|
kind = *ptr++;
|
if (kind == 'M' || kind == 'X')
|
if (kind == 'M' || kind == 'X')
|
{
|
{
|
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
|
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
|
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
|
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
|
if (hexToInt(&ptr,&addr)
|
if (hexToInt(&ptr,&addr)
|
&& *(ptr++) == ','
|
&& *(ptr++) == ','
|
&& hexToInt(&ptr,&length)
|
&& hexToInt(&ptr,&length)
|
&& *(ptr++) == ':')
|
&& *(ptr++) == ':')
|
{
|
{
|
if (valid_addr_range (addr, length))
|
if (valid_addr_range (addr, length))
|
{
|
{
|
if (kind == 'M')
|
if (kind == 'M')
|
hex2mem(ptr, addr, length);
|
hex2mem(ptr, addr, length);
|
else
|
else
|
{
|
{
|
int i;
|
int i;
|
for (i = 0; i < length; i++)
|
for (i = 0; i < length; i++)
|
if (*ptr++ == 0x7d)
|
if (*ptr++ == 0x7d)
|
set_char (addr++, *ptr++ ^ 0x20);
|
set_char (addr++, *ptr++ ^ 0x20);
|
else
|
else
|
set_char (addr++, ptr[-1]);
|
set_char (addr++, ptr[-1]);
|
|
|
}
|
}
|
putPacket ("OK");
|
putPacket ("OK");
|
}
|
}
|
else
|
else
|
putPacket ("E03");
|
putPacket ("E03");
|
}
|
}
|
else
|
else
|
putPacket ("E02");
|
putPacket ("E02");
|
}
|
}
|
else if (kind == 'm')
|
else if (kind == 'm')
|
{
|
{
|
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
|
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
|
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
|
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
|
if (hexToInt(&ptr,&addr)
|
if (hexToInt(&ptr,&addr)
|
&& *(ptr++) == ','
|
&& *(ptr++) == ','
|
&& hexToInt (&ptr,&length))
|
&& hexToInt (&ptr,&length))
|
{
|
{
|
if (valid_addr_range (addr, length))
|
if (valid_addr_range (addr, length))
|
putHex (0, addr, length);
|
putHex (0, addr, length);
|
else
|
else
|
putPacket ("E03");
|
putPacket ("E03");
|
}
|
}
|
else
|
else
|
putPacket ("E02");
|
putPacket ("E02");
|
}
|
}
|
else if (kind == 'R')
|
else if (kind == 'R')
|
{
|
{
|
if (hexToInt (&ptr, &addr))
|
if (hexToInt (&ptr, &addr))
|
registers.pc = addr;
|
registers.pc = addr;
|
putPacket ("OK");
|
putPacket ("OK");
|
}
|
}
|
else if (kind == '!')
|
else if (kind == '!')
|
putPacket ("OK");
|
putPacket ("OK");
|
else if (kind == '?')
|
else if (kind == '?')
|
putHex ('S', (unsigned long)(unsigned int)&sigval, 1);
|
putHex ('S', (unsigned long)(unsigned int)&sigval, 1);
|
else if (kind == 'g')
|
else if (kind == 'g')
|
putHex (0, (unsigned long)(unsigned int)®isters, NUMREGBYTES);
|
putHex (0, (unsigned long)(unsigned int)®isters, NUMREGBYTES);
|
else if (kind == 'P')
|
else if (kind == 'P')
|
{
|
{
|
/* set the value of a single CPU register - return OK */
|
/* set the value of a single CPU register - return OK */
|
unsigned long regno;
|
unsigned long regno;
|
|
|
if (hexToInt (&ptr, ®no)
|
if (hexToInt (&ptr, ®no)
|
&& *ptr++ == '='
|
&& *ptr++ == '='
|
&& regno < NUMREGS)
|
&& regno < NUMREGS)
|
{
|
{
|
hex2mem (ptr, (unsigned long)(unsigned int)(registers.r + regno),
|
hex2mem (ptr, (unsigned long)(unsigned int)(registers.r + regno),
|
regno == PC ? 4 : 2);
|
regno == PC ? 4 : 2);
|
putPacket ("OK");
|
putPacket ("OK");
|
}
|
}
|
else
|
else
|
putPacket ("E01");
|
putPacket ("E01");
|
}
|
}
|
else if (kind == 'G')
|
else if (kind == 'G')
|
{
|
{
|
/* set the value of the CPU registers - return OK */
|
/* set the value of the CPU registers - return OK */
|
hex2mem(ptr, (unsigned long)(unsigned int)®isters, NUMREGBYTES);
|
hex2mem(ptr, (unsigned long)(unsigned int)®isters, NUMREGBYTES);
|
putPacket ("OK");
|
putPacket ("OK");
|
}
|
}
|
else if (kind == 's' || kind == 'c')
|
else if (kind == 's' || kind == 'c')
|
{
|
{
|
/* sAA..AA Step one instruction from AA..AA(optional) */
|
/* sAA..AA Step one instruction from AA..AA(optional) */
|
/* cAA..AA Continue from address AA..AA(optional) */
|
/* cAA..AA Continue from address AA..AA(optional) */
|
/* try to read optional parameter, pc unchanged if no parm */
|
/* try to read optional parameter, pc unchanged if no parm */
|
|
|
is_running = 1;
|
is_running = 1;
|
|
|
if (hexToInt(&ptr,&addr))
|
if (hexToInt(&ptr,&addr))
|
registers.pc = addr;
|
registers.pc = addr;
|
|
|
if (kind == 's') /* single-stepping */
|
if (kind == 's') /* single-stepping */
|
prepare_to_step();
|
prepare_to_step();
|
return;
|
return;
|
}
|
}
|
else if (kind == 'k')
|
else if (kind == 'k')
|
{
|
{
|
/* kill the program */
|
/* kill the program */
|
assign_regs (®isters, &orig_registers);
|
assign_regs (®isters, &orig_registers);
|
is_running = 0;
|
is_running = 0;
|
putPacket ("");
|
putPacket ("");
|
}
|
}
|
else
|
else
|
/* Unknown code. Return an empty reply message. */
|
/* Unknown code. Return an empty reply message. */
|
putPacket ("");
|
putPacket ("");
|
}
|
}
|
}
|
}
|
|
|
static int
|
static int
|
hex (int ch)
|
hex (int ch)
|
{
|
{
|
if ((ch >= '0') && (ch <= '9')) return (ch-'0');
|
if ((ch >= '0') && (ch <= '9')) return (ch-'0');
|
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
|
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
|
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
|
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
/* scan for the sequence $<data>#<checksum> */
|
/* scan for the sequence $<data>#<checksum> */
|
|
|
static unsigned char *
|
static unsigned char *
|
getpacket (void)
|
getpacket (void)
|
{
|
{
|
unsigned char *buffer = &remcomBuffer[0];
|
unsigned char *buffer = &remcomBuffer[0];
|
unsigned checksum;
|
unsigned checksum;
|
int count;
|
int count;
|
char ch;
|
char ch;
|
|
|
while (1)
|
while (1)
|
{
|
{
|
/* wait around for the start character, ignore all other characters */
|
/* wait around for the start character, ignore all other characters */
|
while (getDebugChar () != '$')
|
while (getDebugChar () != '$')
|
;
|
;
|
|
|
checksum = 0;
|
checksum = 0;
|
count = 0;
|
count = 0;
|
while ((ch = getDebugChar ()) == '$')
|
while ((ch = getDebugChar ()) == '$')
|
;
|
;
|
|
|
/* now, read until a # or end of buffer is found */
|
/* now, read until a # or end of buffer is found */
|
while (ch != '#' && count < BUFMAX - 1)
|
while (ch != '#' && count < BUFMAX - 1)
|
{
|
{
|
checksum = checksum + ch;
|
checksum = checksum + ch;
|
buffer[count] = ch;
|
buffer[count] = ch;
|
count = count + 1;
|
count = count + 1;
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
}
|
}
|
buffer[count] = 0;
|
buffer[count] = 0;
|
|
|
if (ch == '#')
|
if (ch == '#')
|
{
|
{
|
unsigned xmitcsum;
|
unsigned xmitcsum;
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
xmitcsum = hex (ch) << 4;
|
xmitcsum = hex (ch) << 4;
|
ch = getDebugChar ();
|
ch = getDebugChar ();
|
xmitcsum += hex (ch);
|
xmitcsum += hex (ch);
|
|
|
/* If one of the above 'hex' calls returns -1, xmitcsum will
|
/* If one of the above 'hex' calls returns -1, xmitcsum will
|
have high bits set, and so the test below will fail. */
|
have high bits set, and so the test below will fail. */
|
|
|
if ((checksum & 0xFF) != xmitcsum)
|
if ((checksum & 0xFF) != xmitcsum)
|
putDebugChar ('-'); /* failed checksum */
|
putDebugChar ('-'); /* failed checksum */
|
else
|
else
|
{
|
{
|
putDebugChar ('+'); /* successful transfer */
|
putDebugChar ('+'); /* successful transfer */
|
return &buffer[0];
|
return &buffer[0];
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* send the packet in buffer. */
|
/* send the packet in buffer. */
|
|
|
static void
|
static void
|
putPacket (unsigned char *buffer_p)
|
putPacket (unsigned char *buffer_p)
|
{
|
{
|
/* $<packet info>#<checksum>. */
|
/* $<packet info>#<checksum>. */
|
do {
|
do {
|
unsigned checksum;
|
unsigned checksum;
|
unsigned char *buffer = buffer_p;
|
unsigned char *buffer = buffer_p;
|
|
|
putDebugChar('$');
|
putDebugChar('$');
|
checksum = 0;
|
checksum = 0;
|
|
|
while (*buffer) {
|
while (*buffer) {
|
putDebugChar(*buffer);
|
putDebugChar(*buffer);
|
checksum += *buffer;
|
checksum += *buffer;
|
buffer++;
|
buffer++;
|
}
|
}
|
putDebugChar('#');
|
putDebugChar('#');
|
putDebugChar(hexchars[(checksum >> 4) % 16]);
|
putDebugChar(hexchars[(checksum >> 4) % 16]);
|
putDebugChar(hexchars[checksum % 16]);
|
putDebugChar(hexchars[checksum % 16]);
|
} while (getDebugChar() != '+');
|
} while (getDebugChar() != '+');
|
}
|
}
|
|
|
/* Convert the memory pointed to by mem into hex, and return it as a packet. */
|
/* Convert the memory pointed to by mem into hex, and return it as a packet. */
|
|
|
static void
|
static void
|
putHex (char c, unsigned long mem_arg, int count)
|
putHex (char c, unsigned long mem_arg, int count)
|
{
|
{
|
do {
|
do {
|
unsigned long mem = mem_arg;
|
unsigned long mem = mem_arg;
|
int i;
|
int i;
|
unsigned checksum;
|
unsigned checksum;
|
|
|
putDebugChar('$');
|
putDebugChar('$');
|
checksum = 0;
|
checksum = 0;
|
|
|
if (c)
|
if (c)
|
{
|
{
|
checksum = c;
|
checksum = c;
|
putDebugChar(c);
|
putDebugChar(c);
|
}
|
}
|
|
|
for (i = 0; i < count; i++)
|
for (i = 0; i < count; i++)
|
{
|
{
|
unsigned char c = get_char (mem);
|
unsigned char c = get_char (mem);
|
char ch = hexchars[c >> 4];
|
char ch = hexchars[c >> 4];
|
putDebugChar(ch);
|
putDebugChar(ch);
|
checksum += ch;
|
checksum += ch;
|
ch = hexchars[c % 16];
|
ch = hexchars[c % 16];
|
putDebugChar(ch);
|
putDebugChar(ch);
|
checksum += ch;
|
checksum += ch;
|
mem++;
|
mem++;
|
}
|
}
|
putDebugChar('#');
|
putDebugChar('#');
|
putDebugChar(hexchars[(checksum >> 4) % 16]);
|
putDebugChar(hexchars[(checksum >> 4) % 16]);
|
putDebugChar(hexchars[checksum % 16]);
|
putDebugChar(hexchars[checksum % 16]);
|
} while (getDebugChar() != '+');
|
} while (getDebugChar() != '+');
|
}
|
}
|
|
|
/* Function: gdb_write(char *, int)
|
/* Function: gdb_write(char *, int)
|
Make gdb write n bytes to stdout (not assumed to be null-terminated). */
|
Make gdb write n bytes to stdout (not assumed to be null-terminated). */
|
|
|
void
|
void
|
gdb_write (char *data, int len)
|
gdb_write (char *data, int len)
|
{
|
{
|
ERR_DETECT_REG &= ~SER0_IRQ_ENA;
|
ERR_DETECT_REG &= ~SER0_IRQ_ENA;
|
putHex ('O', (unsigned long)(unsigned int)data, len);
|
putHex ('O', (unsigned long)(unsigned int)data, len);
|
ERR_DETECT_REG |= SER0_IRQ_ENA;
|
ERR_DETECT_REG |= SER0_IRQ_ENA;
|
}
|
}
|
|
|
int
|
int
|
gdb_read (char *buf, int nbytes)
|
gdb_read (char *buf, int nbytes)
|
{
|
{
|
int i = 0;
|
int i = 0;
|
|
|
ERR_DETECT_REG &= ~SER0_IRQ_ENA;
|
ERR_DETECT_REG &= ~SER0_IRQ_ENA;
|
for (i = 0; i < nbytes; i++)
|
for (i = 0; i < nbytes; i++)
|
{
|
{
|
*(buf + i) = getDebugChar();
|
*(buf + i) = getDebugChar();
|
if ((*(buf + i) == '\n') || (*(buf + i) == '\r'))
|
if ((*(buf + i) == '\n') || (*(buf + i) == '\r'))
|
{
|
{
|
(*(buf + i + 1)) = 0;
|
(*(buf + i + 1)) = 0;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
ERR_DETECT_REG |= SER0_IRQ_ENA;
|
ERR_DETECT_REG |= SER0_IRQ_ENA;
|
return (i);
|
return (i);
|
}
|
}
|
|
|
static int
|
static int
|
valid_addr_range (unsigned long mem, int count)
|
valid_addr_range (unsigned long mem, int count)
|
{
|
{
|
unsigned long last = mem + count - 1;
|
unsigned long last = mem + count - 1;
|
|
|
if (last < 0x800L)
|
if (last < 0x800L)
|
return 1;
|
return 1;
|
|
|
if (mem < 0x7f00L)
|
if (mem < 0x7f00L)
|
return 0;
|
return 0;
|
|
|
if (last > 0x7ffffL)
|
if (last > 0x7ffffL)
|
return 0;
|
return 0;
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Convert the hex array pointed to by buf into binary to be placed in mem.
|
/* Convert the hex array pointed to by buf into binary to be placed in mem.
|
Return a pointer to the character AFTER the last byte written. */
|
Return a pointer to the character AFTER the last byte written. */
|
|
|
static void
|
static void
|
hex2mem (unsigned char *buf, unsigned long mem, int count)
|
hex2mem (unsigned char *buf, unsigned long mem, int count)
|
{
|
{
|
int i;
|
int i;
|
unsigned char ch;
|
unsigned char ch;
|
|
|
for (i=0;i<count;i++)
|
for (i=0;i<count;i++)
|
{
|
{
|
ch = hex(*buf++) << 4;
|
ch = hex(*buf++) << 4;
|
ch = ch + hex(*buf++);
|
ch = ch + hex(*buf++);
|
set_char (mem++, ch);
|
set_char (mem++, ch);
|
}
|
}
|
}
|
}
|
|
|
/**********************************************/
|
/**********************************************/
|
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
|
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
|
/* RETURN NUMBER OF CHARS PROCESSED */
|
/* RETURN NUMBER OF CHARS PROCESSED */
|
/**********************************************/
|
/**********************************************/
|
static int
|
static int
|
hexToInt (unsigned char **ptr, long *intValue)
|
hexToInt (unsigned char **ptr, long *intValue)
|
{
|
{
|
int numChars = 0;
|
int numChars = 0;
|
int hexValue;
|
int hexValue;
|
|
|
*intValue = 0;
|
*intValue = 0;
|
while (**ptr)
|
while (**ptr)
|
{
|
{
|
hexValue = hex(**ptr);
|
hexValue = hex(**ptr);
|
if (hexValue >=0)
|
if (hexValue >=0)
|
{
|
{
|
*intValue = (*intValue <<4) | (unsigned) hexValue;
|
*intValue = (*intValue <<4) | (unsigned) hexValue;
|
numChars ++;
|
numChars ++;
|
}
|
}
|
else
|
else
|
break;
|
break;
|
(*ptr)++;
|
(*ptr)++;
|
}
|
}
|
return (numChars);
|
return (numChars);
|
}
|
}
|
|
|
|
|
/* Function: opcode_size
|
/* Function: opcode_size
|
Determine number of bytes in full opcode by examining first word.
|
Determine number of bytes in full opcode by examining first word.
|
*/
|
*/
|
static int
|
static int
|
opcode_size(unsigned int opcode)
|
opcode_size(unsigned int opcode)
|
{
|
{
|
if ((opcode & 0xff00) == 0)
|
if ((opcode & 0xff00) == 0)
|
return 2;
|
return 2;
|
|
|
if ((opcode & 0xf800) == 0)
|
if ((opcode & 0xf800) == 0)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xf800) == 0x7800)
|
if ((opcode & 0xf800) == 0x7800)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xf000) == 0xc000)
|
if ((opcode & 0xf000) == 0xc000)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xf100) == 0x2000)
|
if ((opcode & 0xf100) == 0x2000)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xfff0) == 0x30e0)
|
if ((opcode & 0xfff0) == 0x30e0)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xf008) == 0x6008)
|
if ((opcode & 0xf008) == 0x6008)
|
return 4;
|
return 4;
|
|
|
if ((opcode & 0xf808) == 0x7008)
|
if ((opcode & 0xf808) == 0x7008)
|
return 4;
|
return 4;
|
|
|
opcode >>= 8;
|
opcode >>= 8;
|
if (opcode == 0x0c || opcode == 0x0d || opcode == 0x31)
|
if (opcode == 0x0c || opcode == 0x0d || opcode == 0x31)
|
return 4;
|
return 4;
|
|
|
return 2;
|
return 2;
|
}
|
}
|
|
|
static struct {
|
static struct {
|
unsigned long addr;
|
unsigned long addr;
|
unsigned long addr2;
|
unsigned long addr2;
|
unsigned int opcode;
|
unsigned int opcode;
|
unsigned int opcode2;
|
unsigned int opcode2;
|
} stepinfo;
|
} stepinfo;
|
|
|
/* Function: prepare_to_step
|
/* Function: prepare_to_step
|
Called from handle_exception to prepare the user program to single-step.
|
Called from handle_exception to prepare the user program to single-step.
|
Places a trap instruction after the target instruction, with special
|
Places a trap instruction after the target instruction, with special
|
extra handling for branch instructions.
|
extra handling for branch instructions.
|
*/
|
*/
|
|
|
static void
|
static void
|
prepare_to_step(void)
|
prepare_to_step(void)
|
{
|
{
|
unsigned long pc = registers.pc;
|
unsigned long pc = registers.pc;
|
unsigned long next_pc, next_pc2;
|
unsigned long next_pc, next_pc2;
|
unsigned int op, op2, sp;
|
unsigned int op, op2, sp;
|
unsigned char op_msb, op_lsb;
|
unsigned char op_msb, op_lsb;
|
int r12;
|
int r12;
|
char r8;
|
char r8;
|
|
|
op = get_word(pc);
|
op = get_word(pc);
|
op_msb = (op >> 8) & 0xff;
|
op_msb = (op >> 8) & 0xff;
|
op_lsb = op & 0xff;
|
op_lsb = op & 0xff;
|
op2 = get_word(pc + 2);
|
op2 = get_word(pc + 2);
|
next_pc = pc + opcode_size(op);
|
next_pc = pc + opcode_size(op);
|
next_pc2 = 0;
|
next_pc2 = 0;
|
|
|
if (op_msb == 0)
|
if (op_msb == 0)
|
{
|
{
|
if (op_lsb == 2)
|
if (op_lsb == 2)
|
{
|
{
|
/* IRET */
|
/* IRET */
|
sp = registers.r[SP];
|
sp = registers.r[SP];
|
next_pc = *(unsigned *)(sp - 4);
|
next_pc = *(unsigned *)(sp - 4);
|
next_pc = (next_pc << 16) | *(unsigned *)(sp - 6);
|
next_pc = (next_pc << 16) | *(unsigned *)(sp - 6);
|
}
|
}
|
else if (op_lsb == 3)
|
else if (op_lsb == 3)
|
{
|
{
|
/* RET */
|
/* RET */
|
sp = registers.r[SP];
|
sp = registers.r[SP];
|
next_pc = *(unsigned *)(sp - 2);
|
next_pc = *(unsigned *)(sp - 2);
|
next_pc = (next_pc << 16) | *(unsigned *)(sp - 4);
|
next_pc = (next_pc << 16) | *(unsigned *)(sp - 4);
|
}
|
}
|
else
|
else
|
{
|
{
|
op2 = op_lsb & 0xf0;
|
op2 = op_lsb & 0xf0;
|
if (op2 && op2 < 0x40)
|
if (op2 && op2 < 0x40)
|
{
|
{
|
/* {CALLR,BR,ICALLR} Rs */
|
/* {CALLR,BR,ICALLR} Rs */
|
next_pc = (pc + 2) + (int)registers.r[op_lsb & 0xf];
|
next_pc = (pc + 2) + (int)registers.r[op_lsb & 0xf];
|
}
|
}
|
else if (op2 < 0x80 || op2 == 0xa0 || op2 == 0xb0)
|
else if (op2 < 0x80 || op2 == 0xa0 || op2 == 0xb0)
|
{
|
{
|
/* {JMP,ICALL,CALL} Rb,Rs */
|
/* {JMP,ICALL,CALL} Rb,Rs */
|
next_pc = registers.r[(op_lsb & 0x10) ? 9 : 8];
|
next_pc = registers.r[(op_lsb & 0x10) ? 9 : 8];
|
next_pc = (next_pc << 16) | (unsigned int)registers.r[op_lsb & 0xf];
|
next_pc = (next_pc << 16) | (unsigned int)registers.r[op_lsb & 0xf];
|
}
|
}
|
}
|
}
|
}
|
}
|
else if (op_msb < 4)
|
else if (op_msb < 4)
|
{
|
{
|
/* {CALLF,JMPF,ICALLF} a24 */
|
/* {CALLF,JMPF,ICALLF} a24 */
|
next_pc = ((unsigned long)op2) << 8;
|
next_pc = ((unsigned long)op2) << 8;
|
next_pc |= op_lsb;
|
next_pc |= op_lsb;
|
}
|
}
|
else if (op_msb < 8)
|
else if (op_msb < 8)
|
{
|
{
|
if ((op2 & 0xf000) == 0)
|
if ((op2 & 0xf000) == 0)
|
{
|
{
|
/* Bx Rd,#imm4,r12 */
|
/* Bx Rd,#imm4,r12 */
|
/* Bx Rd,Rs,r12 */
|
/* Bx Rd,Rs,r12 */
|
r12 = op2 << 4;
|
r12 = op2 << 4;
|
r12 >>= 4;
|
r12 >>= 4;
|
next_pc2 = (pc + 4) + r12;
|
next_pc2 = (pc + 4) + r12;
|
}
|
}
|
}
|
}
|
else if (op_msb == 0x0c || op_msb == 0x0d || (op_msb & 0xf1) == 0x20 ||
|
else if (op_msb == 0x0c || op_msb == 0x0d || (op_msb & 0xf1) == 0x20 ||
|
((op_msb >= 0x7c && op_msb <= 0x7f) && (op2 & 0x8000) == 0))
|
((op_msb >= 0x7c && op_msb <= 0x7f) && (op2 & 0x8000) == 0))
|
{
|
{
|
/* Bxx Rd,Rs,r12 */
|
/* Bxx Rd,Rs,r12 */
|
/* Bxx Rd,#imm8,r12 */
|
/* Bxx Rd,#imm8,r12 */
|
/* Bx m8,#imm3,r12 */
|
/* Bx m8,#imm3,r12 */
|
/* Bx s8,#imm3,r12 */
|
/* Bx s8,#imm3,r12 */
|
r12 = op2 << 4;
|
r12 = op2 << 4;
|
r12 >>= 4;
|
r12 >>= 4;
|
next_pc2 = (pc + 4) + r12;
|
next_pc2 = (pc + 4) + r12;
|
}
|
}
|
else if ((op_msb & 0xf0) == 0x10)
|
else if ((op_msb & 0xf0) == 0x10)
|
{
|
{
|
/* {BR,CALLR} r12 */
|
/* {BR,CALLR} r12 */
|
r12 = (op & 0xffe) << 4;
|
r12 = (op & 0xffe) << 4;
|
r12 >>= 4;
|
r12 >>= 4;
|
next_pc = (pc + 2) + r12;
|
next_pc = (pc + 2) + r12;
|
}
|
}
|
else if ((op_msb & 0xe0) == 0xc0)
|
else if ((op_msb & 0xe0) == 0xc0)
|
{
|
{
|
/* Bxx Rx,#imm16,r8 */
|
/* Bxx Rx,#imm16,r8 */
|
/* TBxx r8 */
|
/* TBxx r8 */
|
r8 = op_lsb;
|
r8 = op_lsb;
|
next_pc2 = next_pc + r8;
|
next_pc2 = next_pc + r8;
|
}
|
}
|
|
|
stepinfo.addr = next_pc;
|
stepinfo.addr = next_pc;
|
stepinfo.opcode = get_word(next_pc);
|
stepinfo.opcode = get_word(next_pc);
|
set_word(next_pc, BREAKPOINT_OPCODE);
|
set_word(next_pc, BREAKPOINT_OPCODE);
|
|
|
if (next_pc2)
|
if (next_pc2)
|
{
|
{
|
stepinfo.addr2 = next_pc2;
|
stepinfo.addr2 = next_pc2;
|
stepinfo.opcode2 = get_word(next_pc2);
|
stepinfo.opcode2 = get_word(next_pc2);
|
set_word(next_pc2, BREAKPOINT_OPCODE);
|
set_word(next_pc2, BREAKPOINT_OPCODE);
|
}
|
}
|
}
|
}
|
|
|
/* Function: finish_from_step
|
/* Function: finish_from_step
|
Called from handle_exception to finish up when the user program
|
Called from handle_exception to finish up when the user program
|
returns from a single-step. Replaces the instructions that had
|
returns from a single-step. Replaces the instructions that had
|
been overwritten by breakpoint. */
|
been overwritten by breakpoint. */
|
|
|
static void
|
static void
|
finish_from_step (void)
|
finish_from_step (void)
|
{
|
{
|
if (stepinfo.addr) /* anything to do? */
|
if (stepinfo.addr) /* anything to do? */
|
{
|
{
|
set_word(stepinfo.addr, stepinfo.opcode);
|
set_word(stepinfo.addr, stepinfo.opcode);
|
stepinfo.addr = 0;
|
stepinfo.addr = 0;
|
if (stepinfo.addr2)
|
if (stepinfo.addr2)
|
{
|
{
|
set_word(stepinfo.addr2, stepinfo.opcode2);
|
set_word(stepinfo.addr2, stepinfo.opcode2);
|
stepinfo.addr2 = 0;
|
stepinfo.addr2 = 0;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* UART support
|
* UART support
|
*/
|
*/
|
#define UART0_BASE 0x7f38
|
#define UART0_BASE 0x7f38
|
#define UART1_BASE 0x7f48
|
#define UART1_BASE 0x7f48
|
|
|
#define UART_CR(base) (*(volatile unsigned char *)(base))
|
#define UART_CR(base) (*(volatile unsigned char *)(base))
|
#define UART_RXD(base) (*(volatile unsigned int *)((base) + 2))
|
#define UART_RXD(base) (*(volatile unsigned int *)((base) + 2))
|
#define UART_TXD(base) (*(volatile unsigned int *)((base) + 4))
|
#define UART_TXD(base) (*(volatile unsigned int *)((base) + 4))
|
|
|
#define UART_CR_RUN 0x80
|
#define UART_CR_RUN 0x80
|
#define UART_CR_ERR 0x40
|
#define UART_CR_ERR 0x40
|
#define UART_CR_BAUD_115k 0x20
|
#define UART_CR_BAUD_115k 0x20
|
#define UART_CR_PARITY 0x10
|
#define UART_CR_PARITY 0x10
|
#define UART_CR_TXEMPTY 0x08
|
#define UART_CR_TXEMPTY 0x08
|
#define UART_CR_TXIEN 0x04
|
#define UART_CR_TXIEN 0x04
|
#define UART_CR_RXRDY 0x02
|
#define UART_CR_RXRDY 0x02
|
#define UART_CR_RXIEN 0x01
|
#define UART_CR_RXIEN 0x01
|
|
|
#define DBG_UART UART0_BASE
|
#define DBG_UART UART0_BASE
|
|
|
static void
|
static void
|
putDebugChar(unsigned ch)
|
putDebugChar(unsigned ch)
|
{
|
{
|
while ((UART_CR(DBG_UART) & UART_CR_TXEMPTY) == 0) ;
|
while ((UART_CR(DBG_UART) & UART_CR_TXEMPTY) == 0) ;
|
|
|
UART_TXD(DBG_UART) = ch;
|
UART_TXD(DBG_UART) = ch;
|
}
|
}
|
|
|
static unsigned char
|
static unsigned char
|
getDebugChar(void)
|
getDebugChar(void)
|
{
|
{
|
while ((UART_CR(DBG_UART) & UART_CR_RXRDY) == 0) ;
|
while ((UART_CR(DBG_UART) & UART_CR_RXRDY) == 0) ;
|
|
|
return UART_RXD(DBG_UART);
|
return UART_RXD(DBG_UART);
|
}
|
}
|
|
|
void
|
void
|
uart_init(void)
|
uart_init(void)
|
{
|
{
|
UART_CR(DBG_UART) |= (UART_CR_RUN | UART_CR_RXIEN);
|
UART_CR(DBG_UART) |= (UART_CR_RUN | UART_CR_RXIEN);
|
}
|
}
|
|
|
|
|
