mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-10 23:03:29 +09:00
![Heiko Schocher](/assets/img/avatar_default.png)
There was for long time no activity in the 8260 area. We need to go further and convert to Kconfig, but it turned out, nobody is interested anymore in 8260, so remove it. Signed-off-by: Heiko Schocher <hs@denx.de>
275 lines
5.7 KiB
C
275 lines
5.7 KiB
C
#include <common.h>
|
|
#include <command.h>
|
|
#include <kgdb.h>
|
|
#include <asm/signal.h>
|
|
#include <asm/processor.h>
|
|
|
|
#define PC_REGNUM 64
|
|
#define SP_REGNUM 1
|
|
|
|
void breakinst(void);
|
|
|
|
int
|
|
kgdb_setjmp(long *buf)
|
|
{
|
|
unsigned long temp;
|
|
|
|
asm volatile("mflr %0; stw %0,0(%1);"
|
|
"stw %%r1,4(%1); stw %%r2,8(%1);"
|
|
"mfcr %0; stw %0,12(%1);"
|
|
"stmw %%r13,16(%1)"
|
|
: "=&r"(temp) : "r" (buf));
|
|
/* XXX should save fp regs as well */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
kgdb_longjmp(long *buf, int val)
|
|
{
|
|
unsigned long temp;
|
|
|
|
if (val == 0)
|
|
val = 1;
|
|
|
|
asm volatile("lmw %%r13,16(%1);"
|
|
"lwz %0,12(%1); mtcrf 0x38,%0;"
|
|
"lwz %0,0(%1); lwz %%r1,4(%1); lwz %%r2,8(%1);"
|
|
"mtlr %0; mr %%r3,%2"
|
|
: "=&r"(temp) : "r" (buf), "r" (val));
|
|
}
|
|
|
|
static inline unsigned long
|
|
get_msr(void)
|
|
{
|
|
unsigned long msr;
|
|
asm volatile("mfmsr %0" : "=r" (msr):);
|
|
return msr;
|
|
}
|
|
|
|
static inline void
|
|
set_msr(unsigned long msr)
|
|
{
|
|
asm volatile("mtmsr %0" : : "r" (msr));
|
|
}
|
|
|
|
/* Convert the SPARC hardware trap type code to a unix signal number. */
|
|
/*
|
|
* This table contains the mapping between PowerPC hardware trap types, and
|
|
* signals, which are primarily what GDB understands.
|
|
*/
|
|
static struct hard_trap_info
|
|
{
|
|
unsigned int tt; /* Trap type code for powerpc */
|
|
unsigned char signo; /* Signal that we map this trap into */
|
|
} hard_trap_info[] = {
|
|
{ 0x200, SIGSEGV }, /* machine check */
|
|
{ 0x300, SIGSEGV }, /* address error (store) */
|
|
{ 0x400, SIGBUS }, /* instruction bus error */
|
|
{ 0x500, SIGINT }, /* interrupt */
|
|
{ 0x600, SIGBUS }, /* alingment */
|
|
{ 0x700, SIGTRAP }, /* breakpoint trap */
|
|
{ 0x800, SIGFPE }, /* fpu unavail */
|
|
{ 0x900, SIGALRM }, /* decrementer */
|
|
{ 0xa00, SIGILL }, /* reserved */
|
|
{ 0xb00, SIGILL }, /* reserved */
|
|
{ 0xc00, SIGCHLD }, /* syscall */
|
|
{ 0xd00, SIGTRAP }, /* single-step/watch */
|
|
{ 0xe00, SIGFPE }, /* fp assist */
|
|
{ 0, 0} /* Must be last */
|
|
};
|
|
|
|
static int
|
|
computeSignal(unsigned int tt)
|
|
{
|
|
struct hard_trap_info *ht;
|
|
|
|
for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
|
|
if (ht->tt == tt)
|
|
return ht->signo;
|
|
|
|
return SIGHUP; /* default for things we don't know about */
|
|
}
|
|
|
|
void
|
|
kgdb_enter(struct pt_regs *regs, kgdb_data *kdp)
|
|
{
|
|
unsigned long msr;
|
|
|
|
kdp->private[0] = msr = get_msr();
|
|
set_msr(msr & ~MSR_EE); /* disable interrupts */
|
|
|
|
if (regs->nip == (unsigned long)breakinst) {
|
|
/* Skip over breakpoint trap insn */
|
|
regs->nip += 4;
|
|
}
|
|
regs->msr &= ~MSR_SE;
|
|
|
|
/* reply to host that an exception has occurred */
|
|
kdp->sigval = computeSignal(regs->trap);
|
|
|
|
kdp->nregs = 2;
|
|
|
|
kdp->regs[0].num = PC_REGNUM;
|
|
kdp->regs[0].val = regs->nip;
|
|
|
|
kdp->regs[1].num = SP_REGNUM;
|
|
kdp->regs[1].val = regs->gpr[SP_REGNUM];
|
|
}
|
|
|
|
void
|
|
kgdb_exit(struct pt_regs *regs, kgdb_data *kdp)
|
|
{
|
|
unsigned long msr = kdp->private[0];
|
|
|
|
if (kdp->extype & KGDBEXIT_WITHADDR)
|
|
regs->nip = kdp->exaddr;
|
|
|
|
switch (kdp->extype & KGDBEXIT_TYPEMASK) {
|
|
|
|
case KGDBEXIT_KILL:
|
|
case KGDBEXIT_CONTINUE:
|
|
set_msr(msr);
|
|
break;
|
|
|
|
case KGDBEXIT_SINGLE:
|
|
regs->msr |= MSR_SE;
|
|
#if 0
|
|
set_msr(msr | MSR_SE);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
kgdb_trap(struct pt_regs *regs)
|
|
{
|
|
return (regs->trap);
|
|
}
|
|
|
|
/* return the value of the CPU registers.
|
|
* some of them are non-PowerPC names :(
|
|
* they are stored in gdb like:
|
|
* struct {
|
|
* u32 gpr[32];
|
|
* f64 fpr[32];
|
|
* u32 pc, ps, cnd, lr; (ps=msr)
|
|
* u32 cnt, xer, mq;
|
|
* }
|
|
*/
|
|
|
|
#define SPACE_REQUIRED ((32*4)+(32*8)+(6*4))
|
|
|
|
int
|
|
kgdb_getregs(struct pt_regs *regs, char *buf, int max)
|
|
{
|
|
int i;
|
|
unsigned long *ptr = (unsigned long *)buf;
|
|
|
|
if (max < SPACE_REQUIRED)
|
|
kgdb_error(KGDBERR_NOSPACE);
|
|
|
|
if ((unsigned long)ptr & 3)
|
|
kgdb_error(KGDBERR_ALIGNFAULT);
|
|
|
|
/* General Purpose Regs */
|
|
for (i = 0; i < 32; i++)
|
|
*ptr++ = regs->gpr[i];
|
|
|
|
/* Floating Point Regs */
|
|
for (i = 0; i < 32; i++) {
|
|
*ptr++ = 0;
|
|
*ptr++ = 0;
|
|
}
|
|
|
|
/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
|
|
*ptr++ = regs->nip;
|
|
*ptr++ = regs->msr;
|
|
*ptr++ = regs->ccr;
|
|
*ptr++ = regs->link;
|
|
*ptr++ = regs->ctr;
|
|
*ptr++ = regs->xer;
|
|
|
|
return (SPACE_REQUIRED);
|
|
}
|
|
|
|
/* set the value of the CPU registers */
|
|
void
|
|
kgdb_putreg(struct pt_regs *regs, int regno, char *buf, int length)
|
|
{
|
|
unsigned long *ptr = (unsigned long *)buf;
|
|
|
|
if (regno < 0 || regno >= 70)
|
|
kgdb_error(KGDBERR_BADPARAMS);
|
|
else if (regno >= 32 && regno < 64) {
|
|
if (length < 8)
|
|
kgdb_error(KGDBERR_NOSPACE);
|
|
}
|
|
else {
|
|
if (length < 4)
|
|
kgdb_error(KGDBERR_NOSPACE);
|
|
}
|
|
|
|
if ((unsigned long)ptr & 3)
|
|
kgdb_error(KGDBERR_ALIGNFAULT);
|
|
|
|
if (regno >= 0 && regno < 32)
|
|
regs->gpr[regno] = *ptr;
|
|
else switch (regno) {
|
|
case 64: regs->nip = *ptr; break;
|
|
case 65: regs->msr = *ptr; break;
|
|
case 66: regs->ccr = *ptr; break;
|
|
case 67: regs->link = *ptr; break;
|
|
case 68: regs->ctr = *ptr; break;
|
|
case 69: regs->ctr = *ptr; break;
|
|
|
|
default:
|
|
kgdb_error(KGDBERR_BADPARAMS);
|
|
}
|
|
}
|
|
|
|
void
|
|
kgdb_putregs(struct pt_regs *regs, char *buf, int length)
|
|
{
|
|
int i;
|
|
unsigned long *ptr = (unsigned long *)buf;
|
|
|
|
if (length < SPACE_REQUIRED)
|
|
kgdb_error(KGDBERR_NOSPACE);
|
|
|
|
if ((unsigned long)ptr & 3)
|
|
kgdb_error(KGDBERR_ALIGNFAULT);
|
|
|
|
/*
|
|
* If the stack pointer has moved, you should pray.
|
|
* (cause only god can help you).
|
|
*/
|
|
|
|
/* General Purpose Regs */
|
|
for (i = 0; i < 32; i++)
|
|
regs->gpr[i] = *ptr++;
|
|
|
|
/* Floating Point Regs */
|
|
ptr += 32*2;
|
|
|
|
/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
|
|
regs->nip = *ptr++;
|
|
regs->msr = *ptr++;
|
|
regs->ccr = *ptr++;
|
|
regs->link = *ptr++;
|
|
regs->ctr = *ptr++;
|
|
regs->xer = *ptr++;
|
|
}
|
|
|
|
/* This function will generate a breakpoint exception. It is used at the
|
|
beginning of a program to sync up with a debugger and can be used
|
|
otherwise as a quick means to stop program execution and "break" into
|
|
the debugger. */
|
|
|
|
void
|
|
kgdb_breakpoint(int argc, char * const argv[])
|
|
{
|
|
asm(" .globl breakinst\n\
|
|
breakinst: .long 0x7d821008\n\
|
|
");
|
|
}
|