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![wdenk](/assets/img/avatar_default.png)
- show PCI clock frequency on MPC8260 systems - add FCC_PSMR_RMII flag for HiP7 processors - in do_jffs2_fsload(), take load address from load_addr if not set explicit, update load_addr otherwise - replaced printf by putc/puts when no formatting is needed (smaller code size, faster execution)
238 lines
6.2 KiB
C
238 lines
6.2 KiB
C
/*
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* Bedbug Functions specific to the MPC603e core
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*/
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#include <common.h>
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#include <command.h>
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#include <linux/ctype.h>
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#include <bedbug/type.h>
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#include <bedbug/bedbug.h>
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#include <bedbug/regs.h>
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#include <bedbug/ppc.h>
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#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) && (defined(CONFIG_MPC824X) || defined(CONFIG_MPC8260))
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#define MAX_BREAK_POINTS 1
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extern CPU_DEBUG_CTX bug_ctx;
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void bedbug603e_init __P((void));
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void bedbug603e_do_break __P((cmd_tbl_t*,int,int,char*[]));
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void bedbug603e_break_isr __P((struct pt_regs*));
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int bedbug603e_find_empty __P((void));
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int bedbug603e_set __P((int,unsigned long));
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int bedbug603e_clear __P((int));
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/* ======================================================================
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* Initialize the global bug_ctx structure for the processor. Clear all
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* of the breakpoints.
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* ====================================================================== */
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void bedbug603e_init( void )
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{
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int i;
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/* -------------------------------------------------- */
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bug_ctx.hw_debug_enabled = 0;
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bug_ctx.stopped = 0;
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bug_ctx.current_bp = 0;
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bug_ctx.regs = NULL;
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bug_ctx.do_break = bedbug603e_do_break;
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bug_ctx.break_isr = bedbug603e_break_isr;
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bug_ctx.find_empty = bedbug603e_find_empty;
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bug_ctx.set = bedbug603e_set;
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bug_ctx.clear = bedbug603e_clear;
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for( i = 1; i <= MAX_BREAK_POINTS; ++i )
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(*bug_ctx.clear)( i );
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puts ("BEDBUG:ready\n");
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return;
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} /* bedbug_init_breakpoints */
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/* ======================================================================
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* Set/clear/show the hardware breakpoint for the 603e. The "off"
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* string will disable a specific breakpoint. The "show" string will
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* display the current breakpoints. Otherwise an address will set a
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* breakpoint at that address. Setting a breakpoint uses the CPU-specific
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* set routine which will assign a breakpoint number.
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* ====================================================================== */
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void bedbug603e_do_break (cmd_tbl_t *cmdtp, int flag, int argc,
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char *argv[])
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{
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long addr; /* Address to break at */
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int which_bp; /* Breakpoint number */
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/* -------------------------------------------------- */
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if (argc < 2)
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{
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printf ("Usage:\n%s\n", cmdtp->usage);
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return;
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}
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/* Turn off a breakpoint */
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if( strcmp( argv[ 1 ], "off" ) == 0 )
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{
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if( bug_ctx.hw_debug_enabled == 0 )
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{
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puts ( "No breakpoints enabled\n" );
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return;
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}
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which_bp = simple_strtoul( argv[ 2 ], NULL, 10 );
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if( bug_ctx.clear )
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(*bug_ctx.clear)( which_bp );
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printf( "Breakpoint %d removed\n", which_bp );
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return;
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}
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/* Show a list of breakpoints */
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if( strcmp( argv[ 1 ], "show" ) == 0 )
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{
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for( which_bp = 1; which_bp <= MAX_BREAK_POINTS; ++which_bp )
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{
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addr = GET_IABR();
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printf( "Breakpoint [%d]: ", which_bp );
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if( (addr & 0x00000002) == 0 )
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puts ( "NOT SET\n" );
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else
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disppc( (unsigned char *)(addr & 0xFFFFFFFC), 0, 1, bedbug_puts, F_RADHEX );
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}
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return;
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}
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/* Set a breakpoint at the address */
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if(!(( isdigit( argv[ 1 ][ 0 ] )) ||
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(( argv[ 1 ][ 0 ] >= 'a' ) && ( argv[ 1 ][ 0 ] <= 'f' )) ||
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(( argv[ 1 ][ 0 ] >= 'A' ) && ( argv[ 1 ][ 0 ] <= 'F' ))))
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{
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printf ("Usage:\n%s\n", cmdtp->usage);
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return;
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}
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addr = simple_strtoul( argv[ 1 ], NULL, 16 );
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if(( bug_ctx.set ) && ( which_bp = (*bug_ctx.set)( 0, addr )) > 0 )
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{
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printf( "Breakpoint [%d]: ", which_bp );
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disppc( (unsigned char *)addr, 0, 1, bedbug_puts, F_RADHEX );
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}
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return;
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} /* bedbug603e_do_break */
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/* ======================================================================
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* Handle a breakpoint. Enter a mini main loop. Stay in the loop until
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* the stopped flag in the debug context is cleared.
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* ====================================================================== */
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void bedbug603e_break_isr( struct pt_regs *regs )
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{
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unsigned long addr; /* Address stopped at */
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/* -------------------------------------------------- */
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bug_ctx.current_bp = 1;
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addr = GET_IABR() & 0xFFFFFFFC;
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bedbug_main_loop( addr, regs );
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return;
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} /* bedbug603e_break_isr */
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/* ======================================================================
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* See if the hardware breakpoint is available.
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* ====================================================================== */
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int bedbug603e_find_empty( void )
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{
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/* -------------------------------------------------- */
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if( (GET_IABR() && 0x00000002) == 0 )
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return 1;
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return 0;
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} /* bedbug603e_find_empty */
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/* ======================================================================
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* Set a breakpoint. If 'which_bp' is zero then find an unused breakpoint
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* number, otherwise reassign the given breakpoint. If hardware debugging
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* is not enabled, then turn it on via the MSR and DBCR0. Set the break
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* address in the IABR register.
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* ====================================================================== */
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int bedbug603e_set( int which_bp, unsigned long addr )
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{
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/* -------------------------------------------------- */
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if(( addr & 0x00000003 ) != 0 )
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{
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puts ( "Breakpoints must be on a 32 bit boundary\n" );
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return 0;
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}
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/* Only look if which_bp == 0, else use which_bp */
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if(( bug_ctx.find_empty ) && ( !which_bp ) &&
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( which_bp = (*bug_ctx.find_empty)()) == 0 )
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{
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puts ( "All breakpoints in use\n" );
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return 0;
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}
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if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
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{
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printf( "Invalid break point # %d\n", which_bp );
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return 0;
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}
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if( ! bug_ctx.hw_debug_enabled )
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{
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bug_ctx.hw_debug_enabled = 1;
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}
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SET_IABR( addr | 0x00000002 );
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return which_bp;
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} /* bedbug603e_set */
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/* ======================================================================
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* Disable a specific breakoint by setting the IABR register to zero.
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* ====================================================================== */
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int bedbug603e_clear( int which_bp )
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{
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/* -------------------------------------------------- */
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if( which_bp < 1 || which_bp > MAX_BREAK_POINTS )
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{
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printf( "Invalid break point # (%d)\n", which_bp );
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return -1;
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}
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SET_IABR( 0 );
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return 0;
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} /* bedbug603e_clear */
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/* ====================================================================== */
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#endif
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