[PATCH 5/5] arm64: simplify interrupt code

[Heinrich Schuchardt]

Carve out a function except_msg() to handle the output for most type of
interrupts.

Consistently use 16 digits for printing the exception syndrome register
esr to match the register size.

Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
---
 arch/arm/lib/interrupts_64.c | 72 ++++++++++++------------------------
 1 file changed, 24 insertions(+), 48 deletions(-)

diff --git a/arch/arm/lib/interrupts_64.c b/arch/arm/lib/interrupts_64.c
index 970f8b6831f..cc20528327b 100644
--- a/arch/arm/lib/interrupts_64.c
+++ b/arch/arm/lib/interrupts_64.c
@@ -170,14 +170,18 @@ static bool smh_emulate_trap(struct pt_regs *regs)
        return true;
 }
 
-/*
- * do_bad_sync handles the impossible case in the Synchronous Abort vector.
+/**
+ * except_msg() - print exception message
+ *
+ * Print exception message, register contents, backtrace, loaded EFI images.
+ *
+ * @msg:       message describing exception type
+ * @pt_regs:   registers
  */
-void do_bad_sync(struct pt_regs *pt_regs)
+static void except_msg(const char *msg, struct pt_regs *pt_regs)
 {
        efi_restore_gd();
-       printf("Bad mode in \"Synchronous Abort\" handler, esr 0x%08lx\n",
-              pt_regs->esr);
+       printf("%s handler, esr 0x%016lx\n", msg, pt_regs->esr);
        show_regs(pt_regs);
        if (CONFIG_IS_ENABLED(FRAMEPOINTER))
                show_backtrace(pt_regs);
@@ -185,18 +189,20 @@ void do_bad_sync(struct pt_regs *pt_regs)
        panic("Resetting CPU ...\n");
 }
 
+/*
+ * do_bad_sync handles the impossible case in the Synchronous Abort vector.
+ */
+void do_bad_sync(struct pt_regs *pt_regs)
+{
+       except_msg("Bad mode in \"Synchronous Abort\"", pt_regs);
+}
+
 /*
  * do_bad_irq handles the impossible case in the Irq vector.
  */
 void do_bad_irq(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("Bad mode in \"Irq\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("Bad mode in \"Irq\"", pt_regs);
 }
 
 /*
@@ -204,13 +210,7 @@ void do_bad_irq(struct pt_regs *pt_regs)
  */
 void do_bad_fiq(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("Bad mode in \"Fiq\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("Bad mode in \"Fiq\"", pt_regs);
 }
 
 /*
@@ -218,13 +218,7 @@ void do_bad_fiq(struct pt_regs *pt_regs)
  */
 void do_bad_error(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("Bad mode in \"Error\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("Bad mode in \"Error\"", pt_regs);
 }
 
 /*
@@ -236,7 +230,7 @@ void do_sync(struct pt_regs *pt_regs)
            smh_emulate_trap(pt_regs))
                return;
        efi_restore_gd();
-       printf("\"Synchronous Abort\" handler, esr 0x%08lx", pt_regs->esr);
+       printf("\"Synchronous Abort\" handler, esr 0x%016lx", pt_regs->esr);
        dump_far(pt_regs->esr);
        printf("\n");
        show_regs(pt_regs);
@@ -251,13 +245,7 @@ void do_sync(struct pt_regs *pt_regs)
  */
 void do_irq(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("\"Irq\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("\"Irq\"", pt_regs);
 }
 
 /*
@@ -265,13 +253,7 @@ void do_irq(struct pt_regs *pt_regs)
  */
 void do_fiq(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("\"Fiq\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("\"Fiq\"", pt_regs);
 }
 
 /*
@@ -282,11 +264,5 @@ void do_fiq(struct pt_regs *pt_regs)
  */
 void __weak do_error(struct pt_regs *pt_regs)
 {
-       efi_restore_gd();
-       printf("\"Error\" handler, esr 0x%08lx\n", pt_regs->esr);
-       show_regs(pt_regs);
-       if (CONFIG_IS_ENABLED(FRAMEPOINTER))
-               show_backtrace(pt_regs);
-       show_efi_loaded_images(pt_regs);
-       panic("Resetting CPU ...\n");
+       except_msg("\"Error\"", pt_regs);
 }
-- 
2.48.1