From ce3afa1c043ab3d4125671441a57353d80f5f6f7 Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Tue, 9 Oct 2007 17:28:36 +0800 Subject: 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 Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 38 +++++++++++++++++++++----------------- arch/blackfin/kernel/traps.c | 8 ++++---- 2 files changed, 25 insertions(+), 21 deletions(-) (limited to 'arch/blackfin') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index abf34a8dd070..8dcd76e87ed5 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -44,6 +44,7 @@ #include #include #include +#include u16 _bfin_swrst; @@ -157,8 +158,10 @@ static __init void parse_cmdline_early(char *cmdline_p) 1; } } + } else if (!memcmp(to, "earlyprintk=", 12)) { + to += 12; + setup_early_printk(to); } - } c = *(to++); if (!c) @@ -177,6 +180,23 @@ void __init setup_arch(char **cmdline_p) #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 @@ void __init setup_arch(char **cmdline_p) 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 ba68eb2ec929..8823e9ade584 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -402,10 +402,6 @@ asmlinkage void trap_c(struct pt_regs *fp) 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 @@ asmlinkage void trap_c(struct pt_regs *fp) 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 -- cgit v1.2.3-59-g8ed1b