aboutsummaryrefslogtreecommitdiff
path: root/arch/microblaze/include
diff options
context:
space:
mode:
authorMichal Simek <monstr@monstr.eu>2011-04-04 15:45:06 +0200
committerMichal Simek <monstr@monstr.eu>2011-07-25 09:23:47 +0200
commite721a45fbed13a52093d2cc1962dbb8a754462ea (patch)
treee4796291b72cdad4d7b64e1c9d19269008005fa8 /arch/microblaze/include
parent95ce618f85a86a7383c1a3e39278be3de84b1b99 (diff)
microblaze: Get early printk console earlier
1. Register early console as standard console 2. Enable CON_BOOT console flag to ensure auto-unregistering by the kernel 3. remap_early_printk function remap physical console baseaddr to virtual space Usage specific function for console remap is done after memory initialization with IRQ turn off that's why there is not necessary to protect it. The reason for remapping is that the kernel use TLB 63 for 1:1 address mapping to be able to use console in very early boot-up phase. But allocating one TLB just for console caused performance degression that's why ioremaps create new mapping and TLB 63 is automatically released and ready to use. Signed-off-by: Michal Simek <monstr@monstr.eu> CC: Russell King <linux@arm.linux.org.uk> CC: Ralf Baechle <ralf@linux-mips.org> CC: Ingo Molnar <mingo@redhat.com> CC: Alan Cox <alan@linux.intel.com> CC: <linux-serial@vger.kernel.org> CC: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/microblaze/include')
-rw-r--r--arch/microblaze/include/asm/setup.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h
index 8f3968971e4..904e5ef6a11 100644
--- a/arch/microblaze/include/asm/setup.h
+++ b/arch/microblaze/include/asm/setup.h
@@ -23,6 +23,7 @@ extern char cmd_line[COMMAND_LINE_SIZE];
void early_printk(const char *fmt, ...);
int setup_early_printk(char *opt);
+void remap_early_printk(void);
void disable_early_printk(void);
#if defined(CONFIG_EARLY_PRINTK)