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[ARM] 4516/1: S3C: Fix uncompressor serial output for ARM926 

Ensure we check for ARM926 in the uncompressor, as all current
ARM926s do not have an ID register and all have S3C2440 style
UARTs.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ben Dooks 2007-07-22 16:14:02 +01:00 committed by Russell King
parent a14a26aca6
commit 5c49218a15
1 changed files with 10 additions and 1 deletions
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11
include/asm-arm/arch-s3c2410/uncompress.h
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@ -25,6 +25,15 @@
/* how many bytes we allow into the FIFO at a time in FIFO mode */
#define FIFO_MAX (14)
static inline int is_arm926(void)
{
unsigned int cpuid;
asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (cpuid));
return ((cpuid & 0xff0) == 0x260);
}
static void arch_detect_cpu(void)
{
unsigned int cpuid;
@ -32,7 +41,7 @@ static void arch_detect_cpu(void)
cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
cpuid &= S3C2410_GSTATUS1_IDMASK;
if (cpuid == S3C2410_GSTATUS1_2440 ||
if (is_arm926() || cpuid == S3C2410_GSTATUS1_2440 ||
cpuid == S3C2410_GSTATUS1_2442) {
fifo_mask = S3C2440_UFSTAT_TXMASK;
fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT;