Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

1 files changed, 316 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc8xx/bedbug_860.c b/arch/powerpc/cpu/mpc8xx/bedbug_860.c
new file mode 100644
index 0000000000..0308bbbf7a
--- /dev/null
+++ b/arch/powerpc/cpu/mpc8xx/bedbug_860.c
@@ -0,0 +1,316 @@
+/*
+ * 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