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Blackfin: fix early crash when booting on wrong cpu 

Make sure we process the kernel command line before poking the hardware,
so that we can process early printk.  This helps ensure that if you boot
a kernel configured for a different processor, something will be left in
the log buffer.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Robin Getz 2009-06-18 22:53:43 +00:00 committed by Mike Frysinger
parent 3aca47c020
commit bd854c077e
1 changed files with 15 additions and 8 deletions
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23
arch/blackfin/kernel/setup.c
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@ -477,9 +477,11 @@ static __init void parse_cmdline_early(char *cmdline_p)
} else if (!memcmp(to, "clkin_hz=", 9)) {
to += 9;
early_init_clkin_hz(to);
#ifdef CONFIG_EARLY_PRINTK
} else if (!memcmp(to, "earlyprintk=", 12)) {
to += 12;
setup_early_printk(to);
#endif
} else if (!memcmp(to, "memmap=", 7)) {
to += 7;
parse_memmap(to);
@ -798,6 +800,11 @@ void __init setup_arch(char **cmdline_p)
{
unsigned long sclk, cclk;
/* Check to make sure we are running on the right processor */
if (unlikely(CPUID != bfin_cpuid()))
printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
CPU, bfin_cpuid(), bfin_revid());
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
@ -812,14 +819,17 @@ void __init setup_arch(char **cmdline_p)
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 = get_mem_size() * 1024 * 1024;
memset(&bfin_memmap, 0, sizeof(bfin_memmap));
/* If the user does not specify things on the command line, use
* what the bootloader set things up as
*/
physical_mem_end = 0;
parse_cmdline_early(&command_line[0]);
if (_ramend == 0)
_ramend = get_mem_size() * 1024 * 1024;
if (physical_mem_end == 0)
physical_mem_end = _ramend;
@ -910,10 +920,7 @@ void __init setup_arch(char **cmdline_p)
else
printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
if (unlikely(CPUID != bfin_cpuid()))
printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
CPU, bfin_cpuid(), bfin_revid());
else {
if (likely(CPUID == bfin_cpuid())) {
if (bfin_revid() != bfin_compiled_revid()) {
if (bfin_compiled_revid() == -1)
printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",