From 5c49218a15188cc036364c4cda325bae3cb138ae Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Sun, 22 Jul 2007 16:14:02 +0100 Subject: [PATCH] [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 Signed-off-by: Russell King --- include/asm-arm/arch-s3c2410/uncompress.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/asm-arm/arch-s3c2410/uncompress.h b/include/asm-arm/arch-s3c2410/uncompress.h index 22328b70ba5d..7058382a6405 100644 --- a/include/asm-arm/arch-s3c2410/uncompress.h +++ b/include/asm-arm/arch-s3c2410/uncompress.h @@ -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; -- 2.20.1