Blackfin arch: Enable earlyprintk earlier - so any error after our interrupt tables are set up will print out
Also ensure that the traps_c code doesn't cause a double fault, by
sending a signal to a faulting kernel before the memory subsystem
is fully initialized, by printing out the error message before sending
the signal.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index abf34a8..8dcd76e 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -44,6 +44,7 @@
#include <asm/blackfin.h>
#include <asm/cplbinit.h>
#include <asm/fixed_code.h>
+#include <asm/early_printk.h>
u16 _bfin_swrst;
@@ -157,8 +158,10 @@
1;
}
}
+ } else if (!memcmp(to, "earlyprintk=", 12)) {
+ to += 12;
+ setup_early_printk(to);
}
-
}
c = *(to++);
if (!c)
@@ -177,6 +180,23 @@
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
+
+#if defined(CONFIG_CMDLINE_BOOL)
+ strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
+ command_line[sizeof(command_line) - 1] = 0;
+#endif
+
+ /* Keep a copy of command line */
+ *cmdline_p = &command_line[0];
+ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
+
+ /* setup memory defaults from the user config */
+ physical_mem_end = 0;
+ _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
+
+ parse_cmdline_early(&command_line[0]);
+
cclk = get_cclk();
sclk = get_sclk();
@@ -210,22 +230,6 @@
flash_probe();
#endif
-#if defined(CONFIG_CMDLINE_BOOL)
- strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
- command_line[sizeof(command_line) - 1] = 0;
-#endif
-
- /* Keep a copy of command line */
- *cmdline_p = &command_line[0];
- memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
- boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
-
- /* setup memory defaults from the user config */
- physical_mem_end = 0;
- _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
-
- parse_cmdline_early(&command_line[0]);
-
if (physical_mem_end == 0)
physical_mem_end = _ramend;
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index ba68eb2..8823e9a 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -402,10 +402,6 @@
break;
}
- info.si_signo = sig;
- info.si_errno = 0;
- info.si_addr = (void *)fp->pc;
- force_sig_info(sig, &info, current);
if (sig != 0 && sig != SIGTRAP) {
unsigned long stack;
dump_bfin_regs(fp, (void *)fp->retx);
@@ -414,6 +410,10 @@
if (current->mm == NULL)
panic("Kernel exception");
}
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_addr = (void *)fp->pc;
+ force_sig_info(sig, &info, current);
/* if the address that we are about to return to is not valid, set it
* to a valid address, if we have a current application or panic
