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authorSonic Zhang <sonic.zhang@analog.com>2010-11-17 06:19:28 +0000
committerMike Frysinger <vapier@gentoo.org>2011-01-10 07:18:22 -0500
commit900de05182d520ff66378e74a7b18f7d9971a32d (patch)
tree98896918623213bef886c7e83f5bf7a537361466 /arch/blackfin/kernel
parent84e97c1014a2afe1a07beb1b6de5f2d867b368fd (diff)
downloadlinux-2.6.38-lt-ux500-900de05182d520ff66378e74a7b18f7d9971a32d.tar.gz
Blackfin: kgdb: disable interrupt when single stepping in ADEOS
When ADEOS and kgdb are both enabled, single step in linux kernel may be scheduled to Xenomai core after return from interrupt handlers. This blocks gdb continue operation after a break point is hit. So, disable interrupt when running gdb single step. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/kgdb.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index edae461b1c5..e89ef34f744 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -345,6 +345,18 @@ void kgdb_roundup_cpu(int cpu, unsigned long flags)
}
#endif
+#ifdef CONFIG_IPIPE
+static unsigned long kgdb_arch_imask;
+
+void kgdb_post_primary_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+ if (kgdb_arch_imask) {
+ cpu_pda[raw_smp_processor_id()].ex_imask = kgdb_arch_imask;
+ kgdb_arch_imask = 0;
+ }
+}
+#endif
+
int kgdb_arch_handle_exception(int vector, int signo,
int err_code, char *remcom_in_buffer,
char *remcom_out_buffer,
@@ -388,6 +400,11 @@ int kgdb_arch_handle_exception(int vector, int signo,
* kgdb_single_step > 0 means in single step mode
*/
kgdb_single_step = i + 1;
+
+#ifdef CONFIG_IPIPE
+ kgdb_arch_imask = cpu_pda[raw_smp_processor_id()].ex_imask;
+ cpu_pda[raw_smp_processor_id()].ex_imask = 0;
+#endif
}
bfin_correct_hw_break();
@@ -448,6 +465,9 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
int kgdb_arch_init(void)
{
kgdb_single_step = 0;
+#ifdef CONFIG_IPIPE
+ kgdb_arch_imask = 0;
+#endif
bfin_remove_all_hw_break();
return 0;