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Date: Wed, 06 Feb 2008 00:34:21 +0100
From: Jan Kiszka <jan.kiszka@....de>
To: Jason Wessel <jason.wessel@...driver.com>,
Ingo Molnar <mingo@...e.hu>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
kgdb-bugreport@...ts.sourceforge.net,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 2/3] KGDB_8250: consolidate config string
Merge mmio and mmap of the KGDB_8250 config string into mmio (with
mapping semantic). I see no point in current mmio that accepts
pre-mapped addresses from the user. Moreover, this conforms to the
interface of 8250_early.
Signed-off-by: Jan Kiszka <jan.kiszka@....de>
---
drivers/serial/8250_kgdb.c | 36 ++++++++++++++----------------------
lib/Kconfig.kgdb | 2 +-
2 files changed, 15 insertions(+), 23 deletions(-)
Index: b/drivers/serial/8250_kgdb.c
===================================================================
--- a/drivers/serial/8250_kgdb.c
+++ b/drivers/serial/8250_kgdb.c
@@ -208,7 +208,7 @@ static int kgdb8250_uart_init(void)
/*
* Syntax for this cmdline option is:
- * <io|mmio|mmap>,<address>[/<regshift>],<baud rate>,<irq> or
+ * <io|mmio>,<address>[/<regshift>],<baud rate>,<irq> or
* ttyS<n>,<baud rate>
*/
static int kgdb8250_parse_config(char *str)
@@ -225,13 +225,9 @@ static int kgdb8250_parse_config(char *s
if (!strncmp(str, "io", 2)) {
kgdb8250_port.iotype = UPIO_PORT;
str += 2;
- } else if (!strncmp(str, "mmap", 4)) {
- kgdb8250_port.iotype = UPIO_MEM;
- kgdb8250_port.flags |= UPF_IOREMAP;
- str += 4;
} else if (!strncmp(str, "mmio", 4)) {
kgdb8250_port.iotype = UPIO_MEM;
- kgdb8250_port.flags &= ~UPF_IOREMAP;
+ kgdb8250_port.flags = UPF_IOREMAP;
str += 4;
} else if (!strncmp(str, "ttyS", 4)) {
str += 4;
@@ -246,7 +242,7 @@ static int kgdb8250_parse_config(char *s
if (late_init_passed)
return err;
printk(KERN_WARNING "kgdb8250: ttyS%d init delayed, "
- "use io|mmio|mmap syntax for early init.\n",
+ "use io/mmio syntax for early init.\n",
line);
return 0;
}
@@ -272,14 +268,9 @@ static int kgdb8250_parse_config(char *s
if (kgdb8250_port.iotype == UPIO_PORT)
kgdb8250_port.iobase = simple_strtoul(str, &str, 16);
- else {
- if (kgdb8250_port.flags & UPF_IOREMAP)
- kgdb8250_port.mapbase =
- (unsigned long) simple_strtoul(str, &str, 16);
- else
- kgdb8250_port.membase =
- (void *) simple_strtoul(str, &str, 16);
- }
+ else
+ kgdb8250_port.mapbase =
+ (unsigned long)simple_strtoul(str, &str, 16);
if (*str == '/') {
str++;
@@ -362,11 +353,11 @@ static int kgdb8250_late_init(void)
kgdb8250_uart_init();
/* Request memory/io regions that we use. */
- if (kgdb8250_port.flags & UPF_IOREMAP) {
+ if (kgdb8250_port.iotype == UPIO_MEM) {
if (!request_mem_region(kgdb8250_port.mapbase,
8 << kgdb8250_port.regshift, "kgdb"))
goto rollback;
- } else if (kgdb8250_port.iotype == UPIO_PORT) {
+ } else {
if (!request_region(kgdb8250_port.iobase,
8 << kgdb8250_port.regshift, "kgdb"))
goto rollback;
@@ -423,14 +414,15 @@ static void kgdb8250_cleanup(void)
fully_initialized = 0;
- if (kgdb8250_port.iotype == UPIO_PORT) {
+ if (kgdb8250_port.iotype == UPIO_MEM) {
+ if (kgdb8250_port.flags & UPF_IOREMAP)
+ iounmap(kgdb8250_port.membase);
+ release_mem_region(kgdb8250_port.mapbase,
+ 8 << kgdb8250_port.regshift);
+ } else {
ioport_unmap(ioaddr);
release_region(kgdb8250_port.iobase,
8 << kgdb8250_port.regshift);
- } else if (kgdb8250_port.flags & UPF_IOREMAP) {
- iounmap(kgdb8250_port.membase);
- release_mem_region(kgdb8250_port.mapbase,
- 8 << kgdb8250_port.regshift);
}
/* Give the port back to the 8250 driver. */
Index: b/lib/Kconfig.kgdb
===================================================================
--- a/lib/Kconfig.kgdb
+++ b/lib/Kconfig.kgdb
@@ -43,7 +43,7 @@ config KGDB_8250
passed as kernel or module parameter, respectively. The
configuration comes in two flavors:
- <io|mmio|mmap>,<address>[/<regshift>],<baud rate>,<irq>
+ <io|mmio>,<address>[/<regshift>],<baud rate>,<irq>
or
ttyS<n>,<baud rate>
--
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