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x86 mmiotrace: implement mmiotrace_printk()

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Offer mmiotrace users a function to inject markers from inside the kernel.
This depends on the trace_vprintk() patch.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pekka Paalanen
2008-09-16 22:00:34 +03:00
committed by Ingo Molnar
parent 801fe40001
commit 9e57fb35d7
4 changed files with 42 additions and 3 deletions
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4
arch/x86/mm/testmmiotrace.c
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@@ -3,6 +3,7 @@
*/
#include <linux/module.h>
#include <linux/io.h>
#include <linux/mmiotrace.h>
#define MODULE_NAME "testmmiotrace"
@@ -13,6 +14,7 @@ MODULE_PARM_DESC(mmio_address, "Start address of the mapping of 16 kB.");
static void do_write_test(void __iomem *p)
{
unsigned int i;
mmiotrace_printk("Write test.\n");
for (i = 0; i < 256; i++)
iowrite8(i, p + i);
for (i = 1024; i < (5 * 1024); i += 2)
@@ -24,6 +26,7 @@ static void do_write_test(void __iomem *p)
static void do_read_test(void __iomem *p)
{
unsigned int i;
mmiotrace_printk("Read test.\n");
for (i = 0; i < 256; i++)
ioread8(p + i);
for (i = 1024; i < (5 * 1024); i += 2)
@@ -39,6 +42,7 @@ static void do_test(void)
pr_err(MODULE_NAME ": could not ioremap, aborting.\n");
return;
}
mmiotrace_printk("ioremap returned %p.\n", p);
do_write_test(p);
do_read_test(p);
iounmap(p);