kgdb, powerpc: arch specific powerpc kgdb support

This patch removes the old kgdb reminants from ARCH=powerpc and
implements the new style arch specific stub for the common kgdb core
interface.

It is possible to have xmon and kgdb in the same kernel, but you
cannot use both at the same time because there is only one set of
debug hooks.

The arch specific kgdb implementation saves the previous state of the
debug hooks and restores them if you unconfigure the kgdb I/O driver.
Kgdb should have no impact on a kernel that has no kgdb I/O driver
configured.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 4efebe88e64a..066e65c59b58 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -43,10 +43,6 @@
 
 #define DBG(fmt...)
 
-#if defined CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-
 extern void bootx_init(unsigned long r4, unsigned long phys);
 
 int boot_cpuid;
@@ -302,18 +298,6 @@ void __init setup_arch(char **cmdline_p)
 
         xmon_setup();
 
-#if defined(CONFIG_KGDB)
-        if (ppc_md.kgdb_map_scc)
-                ppc_md.kgdb_map_scc();
-        set_debug_traps();
-        if (strstr(cmd_line, "gdb")) {
-                if (ppc_md.progress)
-                        ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
-                printk("kgdb breakpoint activated\n");
-                breakpoint();
-        }
-#endif
-
         /*
          * Set cache line size based on type of cpu as a default.
          * Systems with OF can look in the properties on the cpu node(s)