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Diffstat (limited to 'arch/m32r/boot/compressed/m32r_sio.c')
-rw-r--r--arch/m32r/boot/compressed/m32r_sio.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/m32r/boot/compressed/m32r_sio.c b/arch/m32r/boot/compressed/m32r_sio.c
index bad5475eff9..8f9a57271f8 100644
--- a/arch/m32r/boot/compressed/m32r_sio.c
+++ b/arch/m32r/boot/compressed/m32r_sio.c
@@ -6,6 +6,7 @@
*/
#include <linux/config.h>
+#include <asm/processor.h>
static void putc(char c);
@@ -38,16 +39,17 @@ static int puts(const char *s)
static void putc(char c)
{
-
- while ((*BOOT_SIO0STS & 0x3) != 0x3) ;
+ while ((*BOOT_SIO0STS & 0x3) != 0x3)
+ cpu_relax();
if (c == '\n') {
*BOOT_SIO0TXB = '\r';
- while ((*BOOT_SIO0STS & 0x3) != 0x3) ;
+ while ((*BOOT_SIO0STS & 0x3) != 0x3)
+ cpu_relax();
}
*BOOT_SIO0TXB = c;
}
-#else /* defined(CONFIG_PLAT_M32700UT_Alpha) || defined(CONFIG_PLAT_M32700UT) */
-#ifdef CONFIG_MMU
+#else /* !(CONFIG_PLAT_M32700UT_Alpha) && !(CONFIG_PLAT_M32700UT) */
+#if defined(CONFIG_PLAT_MAPPI2)
#define SIO0STS (volatile unsigned short *)(0xa0efd000 + 14)
#define SIO0TXB (volatile unsigned short *)(0xa0efd000 + 30)
#else
@@ -57,11 +59,12 @@ static void putc(char c)
static void putc(char c)
{
-
- while ((*SIO0STS & 0x1) == 0) ;
+ while ((*SIO0STS & 0x1) == 0)
+ cpu_relax();
if (c == '\n') {
*SIO0TXB = '\r';
- while ((*SIO0STS & 0x1) == 0) ;
+ while ((*SIO0STS & 0x1) == 0)
+ cpu_relax();
}
*SIO0TXB = c;
}