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wdenk 2002-08-27 10:52:29 +00:00
parent 0f9cfa09df
commit 1dda0b1f7c
5 changed files with 1292 additions and 0 deletions
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239
cpu/mpc8260/bedbug_603e.c Normal file
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/*
* Bedbug Functions specific to the MPC603e core
*/
#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <cmd_bedbug.h>
#include <bedbug/bedbug.h>
#include <bedbug/regs.h>
#include <bedbug/ppc.h>
#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) && (defined(CONFIG_MPC824X) || defined(CONFIG_MPC8260))
#define MAX_BREAK_POINTS 1
extern CPU_DEBUG_CTX bug_ctx;
void bedbug603e_init __P((void));
void bedbug603e_do_break __P((cmd_tbl_t*,int,int,char*[]));
void bedbug603e_break_isr __P((struct pt_regs*));
int bedbug603e_find_empty __P((void));
int bedbug603e_set __P((int,unsigned long));
int bedbug603e_clear __P((int));
/* ======================================================================
* Initialize the global bug_ctx structure for the processor. Clear all
* of the breakpoints.
* ====================================================================== */
void bedbug603e_init( void )
{
int i;
/* -------------------------------------------------- */
bug_ctx.hw_debug_enabled = 0;
bug_ctx.stopped = 0;
bug_ctx.current_bp = 0;
bug_ctx.regs = NULL;
bug_ctx.do_break = bedbug603e_do_break;
bug_ctx.break_isr = bedbug603e_break_isr;
bug_ctx.find_empty = bedbug603e_find_empty;
bug_ctx.set = bedbug603e_set;
bug_ctx.clear = bedbug603e_clear;
for( i = 1; i <= MAX_BREAK_POINTS; ++i )
(*bug_ctx.clear)( i );
puts ("BEDBUG:ready\n");
return;
} /* bedbug_init_breakpoints */
/* ======================================================================
* Set/clear/show the hardware breakpoint for the 603e. The "off"
* string will disable a specific breakpoint. The "show" string will
* display the current breakpoints. Otherwise an address will set a
* breakpoint at that address. Setting a breakpoint uses the CPU-specific
* set routine which will assign a breakpoint number.
* ====================================================================== */
void bedbug603e_do_break (cmd_tbl_t *cmdtp, int flag, int argc,
char *argv[])
{
long addr; /* Address to break at */
int which_bp; /* Breakpoint number */
/* -------------------------------------------------- */
if (argc < 2)
{
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
/* Turn off a breakpoint */
if( strcmp( argv[ 1 ], "off" ) == 0 )
{
if( bug_ctx.hw_debug_enabled == 0 )
{
printf( "No breakpoints enabled\n" );
return;
}
which_bp = simple_strtoul( argv[ 2 ], NULL, 10 );
if( bug_ctx.clear )
(*bug_ctx.clear)( which_bp );
printf( "Breakpoint %d removed\n", which_bp );
return;
}
/* Show a list of breakpoints */
if( strcmp( argv[ 1 ], "show" ) == 0 )
{
for( which_bp = 1; which_bp <= MAX_BREAK_POINTS; ++which_bp )
{
addr = GET_IABR();
printf( "Breakpoint [%d]: ", which_bp );
if( (addr & 0x00000002) == 0 )
printf( "NOT SET\n" );
else
disppc( (unsigned char *)(addr & 0xFFFFFFFC), 0, 1, bedbug_puts, F_RADHEX );
}
return;
}
/* Set a breakpoint at the address */
if(!(( isdigit( argv[ 1 ][ 0 ] )) ||
(( argv[ 1 ][ 0 ] >= 'a' ) && ( argv[ 1 ][ 0 ] <= 'f' )) ||
(( argv[ 1 ][ 0 ] >= 'A' ) && ( argv[ 1 ][ 0 ] <= 'F' ))))
{
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
addr = simple_strtoul( argv[ 1 ], NULL, 16 );
if(( bug_ctx.set ) && ( which_bp = (*bug_ctx.set)( 0, addr )) > 0 )
{
printf( "Breakpoint [%d]: ", which_bp );
disppc( (unsigned char *)addr, 0, 1, bedbug_puts, F_RADHEX );
}
return;
} /* bedbug603e_do_break */
/* ======================================================================
* Handle a breakpoint. Enter a mini main loop. Stay in the loop until
* the stopped flag in the debug context is cleared.
* ====================================================================== */
void bedbug603e_break_isr( struct pt_regs *regs )
{
unsigned long addr; /* Address stopped at */
/* -------------------------------------------------- */
bug_ctx.current_bp = 1;
addr = GET_IABR() & 0xFFFFFFFC;
bedbug_main_loop( addr, regs );
return;
} /* bedbug603e_break_isr */
/* ======================================================================
* See if the hardware breakpoint is available.
* ====================================================================== */
int bedbug603e_find_empty( void )
{
/* -------------------------------------------------- */
if( (GET_IABR() && 0x00000002) == 0 )
return 1;
return 0;
} /* bedbug603e_find_empty */
/* ======================================================================
* Set a breakpoint. If 'which_bp' is zero then find an unused breakpoint
* number, otherwise reassign the given breakpoint. If hardware debugging
* is not enabled, then turn it on via the MSR and DBCR0. Set the break
* address in the IABR register.
* ====================================================================== */
int bedbug603e_set( int which_bp, unsigned long addr )
{
/* -------------------------------------------------- */
if(( addr & 0x00000003 ) != 0 )
{
printf( "Breakpoints must be on a 32 bit boundary\n" );
return 0;
}
/* Only look if which_bp == 0, else use which_bp */
if(( bug_ctx.find_empty ) && ( !which_bp ) &&
( which_bp = (*bug_ctx.find_empty)()) == 0 )
{
printf( "All breakpoints in use\n" );
return 0;
}
if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
{
printf( "Invalid break point # %d\n", which_bp );
return 0;
}
if( ! bug_ctx.hw_debug_enabled )
{
bug_ctx.hw_debug_enabled = 1;
}
SET_IABR( addr | 0x00000002 );
return which_bp;
} /* bedbug603e_set */
/* ======================================================================
* Disable a specific breakoint by setting the IABR register to zero.
* ====================================================================== */
int bedbug603e_clear( int which_bp )
{
/* -------------------------------------------------- */
if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
{
printf( "Invalid break point # (%d)\n", which_bp );
return -1;
}
SET_IABR( 0 );
return 0;
} /* bedbug603e_clear */
/* ====================================================================== */
#endif

318
cpu/mpc8xx/bedbug_860.c Normal file
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/*
* Bedbug Functions specific to the MPC860 chip
*/
#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <cmd_bedbug.h>
#include <bedbug/bedbug.h>
#include <bedbug/regs.h>
#include <bedbug/ppc.h>
#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) && defined(CONFIG_MPC860)
#define MAX_BREAK_POINTS 2
extern CPU_DEBUG_CTX bug_ctx;
void bedbug860_init __P((void));
void bedbug860_do_break __P((cmd_tbl_t*,int,int,char*[]));
void bedbug860_break_isr __P((struct pt_regs*));
int bedbug860_find_empty __P((void));
int bedbug860_set __P((int,unsigned long));
int bedbug860_clear __P((int));
/* ======================================================================
* Initialize the global bug_ctx structure for the MPC860. Clear all
* of the breakpoints.
* ====================================================================== */
void bedbug860_init( void )
{
int i;
/* -------------------------------------------------- */
bug_ctx.hw_debug_enabled = 0;
bug_ctx.stopped = 0;
bug_ctx.current_bp = 0;
bug_ctx.regs = NULL;
bug_ctx.do_break = bedbug860_do_break;
bug_ctx.break_isr = bedbug860_break_isr;
bug_ctx.find_empty = bedbug860_find_empty;
bug_ctx.set = bedbug860_set;
bug_ctx.clear = bedbug860_clear;
for( i = 1; i <= MAX_BREAK_POINTS; ++i )
(*bug_ctx.clear)( i );
puts ("BEDBUG:ready\n");
return;
} /* bedbug_init_breakpoints */
/* ======================================================================
* Set/clear/show one of the hardware breakpoints for the 860. The "off"
* string will disable a specific breakpoint. The "show" string will
* display the current breakpoints. Otherwise an address will set a
* breakpoint at that address. Setting a breakpoint uses the CPU-specific
* set routine which will assign a breakpoint number.
* ====================================================================== */
void bedbug860_do_break (cmd_tbl_t *cmdtp, int flag, int argc,
char *argv[])
{
long addr = 0; /* Address to break at */
int which_bp; /* Breakpoint number */
/* -------------------------------------------------- */
if (argc < 2)
{
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
/* Turn off a breakpoint */
if( strcmp( argv[ 1 ], "off" ) == 0 )
{
if( bug_ctx.hw_debug_enabled == 0 )
{
printf( "No breakpoints enabled\n" );
return;
}
which_bp = simple_strtoul( argv[ 2 ], NULL, 10 );
if( bug_ctx.clear )
(*bug_ctx.clear)( which_bp );
printf( "Breakpoint %d removed\n", which_bp );
return;
}
/* Show a list of breakpoints */
if( strcmp( argv[ 1 ], "show" ) == 0 )
{
for( which_bp = 1; which_bp <= MAX_BREAK_POINTS; ++which_bp )
{
switch( which_bp )
{
case 1: addr = GET_CMPA(); break;
case 2: addr = GET_CMPB(); break;
case 3: addr = GET_CMPC(); break;
case 4: addr = GET_CMPD(); break;
}
printf( "Breakpoint [%d]: ", which_bp );
if( addr == 0 )
printf( "NOT SET\n" );
else
disppc( (unsigned char *)addr, 0, 1, bedbug_puts, F_RADHEX );
}
return;
}
/* Set a breakpoint at the address */
if( !isdigit( argv[ 1 ][ 0 ]))
{
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
addr = simple_strtoul( argv[ 1 ], NULL, 16 ) & 0xfffffffc;
if(( bug_ctx.set ) && ( which_bp = (*bug_ctx.set)( 0, addr )) > 0 )
{
printf( "Breakpoint [%d]: ", which_bp );
disppc( (unsigned char *)addr, 0, 1, bedbug_puts, F_RADHEX );
}
return;
} /* bedbug860_do_break */
/* ======================================================================
* Handle a breakpoint. First determine which breakpoint was hit by
* looking at the DeBug Status Register (DBSR), clear the breakpoint
* and enter a mini main loop. Stay in the loop until the stopped flag
* in the debug context is cleared.
* ====================================================================== */
void bedbug860_break_isr( struct pt_regs *regs )
{
unsigned long addr; /* Address stopped at */
unsigned long cause; /* Address stopped at */
/* -------------------------------------------------- */
cause = GET_ICR();
if( !(cause & 0x00000004)) {
printf( "Not an instruction breakpoint (ICR 0x%08lx)\n", cause );
return;
}
addr = regs->nip;
if( addr == GET_CMPA() )
{
bug_ctx.current_bp = 1;
}
else if( addr == GET_CMPB() )
{
bug_ctx.current_bp = 2;
}
else if( addr == GET_CMPC() )
{
bug_ctx.current_bp = 3;
}
else if( addr == GET_CMPD() )
{
bug_ctx.current_bp = 4;
}
bedbug_main_loop( addr, regs );
return;
} /* bedbug860_break_isr */
/* ======================================================================
* Look through all of the hardware breakpoints available to see if one
* is unused.
* ====================================================================== */
int bedbug860_find_empty( void )
{
/* -------------------------------------------------- */
if( GET_CMPA() == 0 )
return 1;
if( GET_CMPB() == 0 )
return 2;
if( GET_CMPC() == 0 )
return 3;
if( GET_CMPD() == 0 )
return 4;
return 0;
} /* bedbug860_find_empty */
/* ======================================================================
* Set a breakpoint. If 'which_bp' is zero then find an unused breakpoint
* number, otherwise reassign the given breakpoint. If hardware debugging
* is not enabled, then turn it on via the MSR and DBCR0. Set the break
* address in the appropriate IACx register and enable proper address
* beakpoint in DBCR0.
* ====================================================================== */
int bedbug860_set( int which_bp, unsigned long addr )
{
/* -------------------------------------------------- */
/* Only look if which_bp == 0, else use which_bp */
if(( bug_ctx.find_empty ) && ( !which_bp ) &&
( which_bp = (*bug_ctx.find_empty)()) == 0 )
{
printf( "All breakpoints in use\n" );
return 0;
}
if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
{
printf( "Invalid break point # %d\n", which_bp );
return 0;
}
if( ! bug_ctx.hw_debug_enabled )
{
bug_ctx.hw_debug_enabled = 1;
SET_DER( GET_DER() | 0x00000004 );
}
switch( which_bp )
{
case 1:
SET_CMPA( addr );
SET_ICTRL( GET_ICTRL() | 0x80080800 ); /* CTA=Equal,IW0=Match A,SIW0EN */
break;
case 2:
SET_CMPB( addr );
SET_ICTRL( GET_ICTRL() | 0x10020400 ); /* CTB=Equal,IW1=Match B,SIW1EN */
break;
case 3:
SET_CMPC( addr );
SET_ICTRL( GET_ICTRL() | 0x02008200 ); /* CTC=Equal,IW2=Match C,SIW2EN */
break;
case 4:
SET_CMPD( addr );
SET_ICTRL( GET_ICTRL() | 0x00404100 ); /* CTD=Equal,IW3=Match D,SIW3EN */
break;
}
return which_bp;
} /* bedbug860_set */
/* ======================================================================
* Disable a specific breakoint by setting the appropriate IACx register
* to zero and claring the instruction address breakpoint in DBCR0.
* ====================================================================== */
int bedbug860_clear( int which_bp )
{
/* -------------------------------------------------- */
if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
{
printf( "Invalid break point # (%d)\n", which_bp );
return -1;
}
switch( which_bp )
{
case 1:
SET_CMPA( 0 );
SET_ICTRL( GET_ICTRL() & ~0x80080800 ); /* CTA=Equal,IW0=Match A,SIW0EN */
break;
case 2:
SET_CMPB( 0 );
SET_ICTRL( GET_ICTRL() & ~0x10020400 ); /* CTB=Equal,IW1=Match B,SIW1EN */
break;
case 3:
SET_CMPC( 0 );
SET_ICTRL( GET_ICTRL() & ~0x02008200 ); /* CTC=Equal,IW2=Match C,SIW2EN */
break;
case 4:
SET_CMPD( 0 );
SET_ICTRL( GET_ICTRL() & ~0x00404100 ); /* CTD=Equal,IW3=Match D,SIW3EN */
break;
}
return 0;
} /* bedbug860_clear */
/* ====================================================================== */
#endif

309
cpu/ppc4xx/bedbug_405.c Normal file
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/*
* Bedbug Functions specific to the PPC405 chip
*/
#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <cmd_bedbug.h>
#include <bedbug/bedbug.h>
#include <bedbug/regs.h>
#include <bedbug/ppc.h>
#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) && defined(CONFIG_4xx)
#define MAX_BREAK_POINTS 4
extern CPU_DEBUG_CTX bug_ctx;
void bedbug405_init __P ((void));
void bedbug405_do_break __P ((cmd_tbl_t *, int, int, char *[]));
void bedbug405_break_isr __P ((struct pt_regs *));
int bedbug405_find_empty __P ((void));
int bedbug405_set __P ((int, unsigned long));
int bedbug405_clear __P ((int));
/* ======================================================================
* Initialize the global bug_ctx structure for the IBM PPC405. Clear all
* of the breakpoints.
* ====================================================================== */
void bedbug405_init (void)
{
int i;
/* -------------------------------------------------- */
bug_ctx.hw_debug_enabled = 0;
bug_ctx.stopped = 0;
bug_ctx.current_bp = 0;
bug_ctx.regs = NULL;
bug_ctx.do_break = bedbug405_do_break;
bug_ctx.break_isr = bedbug405_break_isr;
bug_ctx.find_empty = bedbug405_find_empty;
bug_ctx.set = bedbug405_set;
bug_ctx.clear = bedbug405_clear;
for (i = 1; i <= MAX_BREAK_POINTS; ++i)
(*bug_ctx.clear) (i);
puts ("BEDBUG:ready\n");
return;
} /* bedbug_init_breakpoints */
/* ======================================================================
* Set/clear/show one of the hardware breakpoints for the 405. The "off"
* string will disable a specific breakpoint. The "show" string will
* display the current breakpoints. Otherwise an address will set a
* breakpoint at that address. Setting a breakpoint uses the CPU-specific
* set routine which will assign a breakpoint number.
* ====================================================================== */
void bedbug405_do_break (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
long addr = 0; /* Address to break at */
int which_bp; /* Breakpoint number */
/* -------------------------------------------------- */
if (argc < 2) {
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
/* Turn off a breakpoint */
if (strcmp (argv[1], "off") == 0) {
if (bug_ctx.hw_debug_enabled == 0) {
printf ("No breakpoints enabled\n");
return;
}
which_bp = simple_strtoul (argv[2], NULL, 10);
if (bug_ctx.clear)
(*bug_ctx.clear) (which_bp);
printf ("Breakpoint %d removed\n", which_bp);
return;
}
/* Show a list of breakpoints */
if (strcmp (argv[1], "show") == 0) {
for (which_bp = 1; which_bp <= MAX_BREAK_POINTS; ++which_bp) {
switch (which_bp) {
case 1:
addr = GET_IAC1 ();
break;
case 2:
addr = GET_IAC2 ();
break;
case 3:
addr = GET_IAC3 ();
break;
case 4:
addr = GET_IAC4 ();
break;
}
printf ("Breakpoint [%d]: ", which_bp);
if (addr == 0)
printf ("NOT SET\n");
else
disppc ((unsigned char *) addr, 0, 1, bedbug_puts,
F_RADHEX);
}
return;
}
/* Set a breakpoint at the address */
if (!isdigit (argv[1][0])) {
printf ("Usage:\n%s\n", cmdtp->usage);
return;
}
addr = simple_strtoul (argv[1], NULL, 16) & 0xfffffffc;
if ((bug_ctx.set) && (which_bp = (*bug_ctx.set) (0, addr)) > 0) {
printf ("Breakpoint [%d]: ", which_bp);
disppc ((unsigned char *) addr, 0, 1, bedbug_puts, F_RADHEX);
}
return;
} /* bedbug405_do_break */
/* ======================================================================
* Handle a breakpoint. First determine which breakpoint was hit by
* looking at the DeBug Status Register (DBSR), clear the breakpoint
* and enter a mini main loop. Stay in the loop until the stopped flag
* in the debug context is cleared.
* ====================================================================== */
void bedbug405_break_isr (struct pt_regs *regs)
{
unsigned long dbsr_val; /* Value of the DBSR */
unsigned long addr = 0; /* Address stopped at */
/* -------------------------------------------------- */
dbsr_val = GET_DBSR ();
if (dbsr_val & DBSR_IA1) {
bug_ctx.current_bp = 1;
addr = GET_IAC1 ();
SET_DBSR (DBSR_IA1); /* Write a 1 to clear */
} else if (dbsr_val & DBSR_IA2) {
bug_ctx.current_bp = 2;
addr = GET_IAC2 ();
SET_DBSR (DBSR_IA2); /* Write a 1 to clear */
} else if (dbsr_val & DBSR_IA3) {
bug_ctx.current_bp = 3;
addr = GET_IAC3 ();
SET_DBSR (DBSR_IA3); /* Write a 1 to clear */
} else if (dbsr_val & DBSR_IA4) {
bug_ctx.current_bp = 4;
addr = GET_IAC4 ();
SET_DBSR (DBSR_IA4); /* Write a 1 to clear */
}
bedbug_main_loop (addr, regs);
return;
} /* bedbug405_break_isr */
/* ======================================================================
* Look through all of the hardware breakpoints available to see if one
* is unused.
* ====================================================================== */
int bedbug405_find_empty (void)
{
/* -------------------------------------------------- */
if (GET_IAC1 () == 0)
return 1;
if (GET_IAC2 () == 0)
return 2;
if (GET_IAC3 () == 0)
return 3;
if (GET_IAC4 () == 0)
return 4;
return 0;
} /* bedbug405_find_empty */
/* ======================================================================
* Set a breakpoint. If 'which_bp' is zero then find an unused breakpoint
* number, otherwise reassign the given breakpoint. If hardware debugging
* is not enabled, then turn it on via the MSR and DBCR0. Set the break
* address in the appropriate IACx register and enable proper address
* beakpoint in DBCR0.
* ====================================================================== */
int bedbug405_set (int which_bp, unsigned long addr)
{
/* -------------------------------------------------- */
/* Only look if which_bp == 0, else use which_bp */
if ((bug_ctx.find_empty) && (!which_bp) &&
(which_bp = (*bug_ctx.find_empty) ()) == 0) {
printf ("All breakpoints in use\n");
return 0;
}
if (which_bp < 1 || which_bp > MAX_BREAK_POINTS) {
printf ("Invalid break point # %d\n", which_bp);
return 0;
}
if (!bug_ctx.hw_debug_enabled) {
SET_MSR (GET_MSR () | 0x200); /* set MSR[ DE ] */
SET_DBCR0 (GET_DBCR0 () | DBCR0_IDM);
bug_ctx.hw_debug_enabled = 1;
}
switch (which_bp) {
case 1:
SET_IAC1 (addr);
SET_DBCR0 (GET_DBCR0 () | DBCR0_IA1);
break;
case 2:
SET_IAC2 (addr);
SET_DBCR0 (GET_DBCR0 () | DBCR0_IA2);
break;
case 3:
SET_IAC3 (addr);
SET_DBCR0 (GET_DBCR0 () | DBCR0_IA3);
break;
case 4:
SET_IAC4 (addr);
SET_DBCR0 (GET_DBCR0 () | DBCR0_IA4);
break;
}
return which_bp;
} /* bedbug405_set */
/* ======================================================================
* Disable a specific breakoint by setting the appropriate IACx register
* to zero and claring the instruction address breakpoint in DBCR0.
* ====================================================================== */
int bedbug405_clear (int which_bp)
{
/* -------------------------------------------------- */
if (which_bp < 1 || which_bp > MAX_BREAK_POINTS) {
printf ("Invalid break point # (%d)\n", which_bp);
return -1;
}
switch (which_bp) {
case 1:
SET_IAC1 (0);
SET_DBCR0 (GET_DBCR0 () & ~DBCR0_IA1);
break;
case 2:
SET_IAC2 (0);
SET_DBCR0 (GET_DBCR0 () & ~DBCR0_IA2);
break;
case 3:
SET_IAC3 (0);
SET_DBCR0 (GET_DBCR0 () & ~DBCR0_IA3);
break;
case 4:
SET_IAC4 (0);
SET_DBCR0 (GET_DBCR0 () & ~DBCR0_IA4);
break;
}
return 0;
} /* bedbug405_clear */
/* ====================================================================== */
#endif

326
lib_ppc/kgdb.c Normal file
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#include <common.h>
#include <command.h>
#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
#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)
{
asm ("mflr 0; stw 0,0(%0);"
"stw 1,4(%0); stw 2,8(%0);"
"mfcr 0; stw 0,12(%0);"
"stmw 13,16(%0)"
: : "r" (buf));
/* XXX should save fp regs as well */
return 0;
}
void
kgdb_longjmp(long *buf, int val)
{
if (val == 0)
val = 1;
asm ("lmw 13,16(%0);"
"lwz 0,12(%0); mtcrf 0x38,0;"
"lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
"mtlr 0; mr 3,%1"
: : "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))
#ifdef CONFIG_8260
/* store floating double indexed */
#define STFDI(n,p) __asm__ __volatile__ ("stfd " #n ",%0" : "=o"(p[2*n]))
/* store floating double multiple */
#define STFDM(p) { STFDI( 0,p); STFDI( 1,p); STFDI( 2,p); STFDI( 3,p); \
STFDI( 4,p); STFDI( 5,p); STFDI( 6,p); STFDI( 7,p); \
STFDI( 8,p); STFDI( 9,p); STFDI(10,p); STFDI(11,p); \
STFDI(12,p); STFDI(13,p); STFDI(14,p); STFDI(15,p); \
STFDI(16,p); STFDI(17,p); STFDI(18,p); STFDI(19,p); \
STFDI(20,p); STFDI(21,p); STFDI(22,p); STFDI(23,p); \
STFDI(24,p); STFDI(25,p); STFDI(26,p); STFDI(27,p); \
STFDI(28,p); STFDI(29,p); STFDI(30,p); STFDI(31,p); }
#endif
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 */
#ifdef CONFIG_8260
STFDM(ptr);
ptr += 32*2;
#else
for (i = 0; i < 32; i++) {
*ptr++ = 0;
*ptr++ = 0;
}
#endif
/* 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 */
#ifdef CONFIG_8260
/* load floating double */
#define LFD(n,v) __asm__ __volatile__ ("lfd " #n ",%0" :: "o"(v))
/* load floating double indexed */
#define LFDI(n,p) __asm__ __volatile__ ("lfd " #n ",%0" :: "o"((p)[2*n]))
/* load floating double multiple */
#define LFDM(p) { LFDI( 0,p); LFDI( 1,p); LFDI( 2,p); LFDI( 3,p); \
LFDI( 4,p); LFDI( 5,p); LFDI( 6,p); LFDI( 7,p); \
LFDI( 8,p); LFDI( 9,p); LFDI(10,p); LFDI(11,p); \
LFDI(12,p); LFDI(13,p); LFDI(14,p); LFDI(15,p); \
LFDI(16,p); LFDI(17,p); LFDI(18,p); LFDI(19,p); \
LFDI(20,p); LFDI(21,p); LFDI(22,p); LFDI(23,p); \
LFDI(24,p); LFDI(25,p); LFDI(26,p); LFDI(27,p); \
LFDI(28,p); LFDI(29,p); LFDI(30,p); LFDI(31,p); }
#endif
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) {
#ifdef CONFIG_8260
#define caseF(n) \
case (n) + 32: LFD(n, *ptr); break;
caseF( 0) caseF( 1) caseF( 2) caseF( 3) caseF( 4) caseF( 5) caseF( 6) caseF( 7)
caseF( 8) caseF( 9) caseF(10) caseF(11) caseF(12) caseF(13) caseF(14) caseF(15)
caseF(16) caseF(17) caseF(18) caseF(19) caseF(20) caseF(21) caseF(22) caseF(23)
caseF(24) caseF(25) caseF(26) caseF(27) caseF(28) caseF(29) caseF(30) caseF(31)
#undef caseF
#endif
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 */
#ifdef CONFIG_8260
LFDM(ptr);
#endif
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 *argv[])
{
asm(" .globl breakinst\n\
breakinst: .long 0x7d821008\n\
");
}
#endif /* CFG_CMD_KGDB */

100
lib_ppc/time.c Normal file
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@ -0,0 +1,100 @@
/*
* (C) Copyright 2000, 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
/* ------------------------------------------------------------------------- */
/*
* This function is intended for SHORT delays only.
* It will overflow at around 10 seconds @ 400MHz,
* or 20 seconds @ 200MHz.
*/
unsigned long usec2ticks(unsigned long usec)
{
ulong ticks;
if (usec < 1000) {
ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
} else {
ticks = ((usec / 10) * (get_tbclk() / 100000));
}
return (ticks);
}
/* ------------------------------------------------------------------------- */
/*
* We implement the delay by converting the delay (the number of
* microseconds to wait) into a number of time base ticks; then we
* watch the time base until it has incremented by that amount.
*/
void udelay(unsigned long usec)
{
ulong ticks = usec2ticks (usec);
wait_ticks (ticks);
}
/* ------------------------------------------------------------------------- */
unsigned long ticks2usec(unsigned long ticks)
{
ulong tbclk = get_tbclk();
/* usec = ticks * 1000000 / tbclk
* Multiplication would overflow at ~4.2e3 ticks,
* so we break it up into
* usec = ( ( ticks * 1000) / tbclk ) * 1000;
*/
ticks *= 1000L;
ticks /= tbclk;
ticks *= 1000L;
return ((ulong)ticks);
}
/* ------------------------------------------------------------------------- */
int init_timebase (void)
{
#ifdef CONFIG_8xx
volatile immap_t *immap = (immap_t *) CFG_IMMR;
/* unlock */
immap->im_sitk.sitk_tbk = KAPWR_KEY;
#endif
/* reset */
asm ("li 3,0 ; mttbu 3 ; mttbl 3 ;");
#ifdef CONFIG_8xx
/* enable */
immap->im_sit.sit_tbscr |= TBSCR_TBE;
#endif
return (0);
}
/* ------------------------------------------------------------------------- */