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Diffstat (limited to 'arch/ppc/cpu/mpc8xx/bedbug_860.c')
-rw-r--r--arch/ppc/cpu/mpc8xx/bedbug_860.c316
1 files changed, 0 insertions, 316 deletions
diff --git a/arch/ppc/cpu/mpc8xx/bedbug_860.c b/arch/ppc/cpu/mpc8xx/bedbug_860.c
deleted file mode 100644
index 0308bbb..0000000
--- a/arch/ppc/cpu/mpc8xx/bedbug_860.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- * Bedbug Functions specific to the MPC860 chip
- */
-
-#include <common.h>
-#include <command.h>
-#include <linux/ctype.h>
-#include <bedbug/bedbug.h>
-#include <bedbug/regs.h>
-#include <bedbug/ppc.h>
-#include <bedbug/type.h>
-
-#if defined(CONFIG_CMD_BEDBUG) && defined(CONFIG_8xx)
-
-#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)
- {
- cmd_usage(cmdtp);
- 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 ]))
- {
- cmd_usage(cmdtp);
- 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
generated by cgit v1.1 at 2024-11-05 23:57:31 +0000