From e399b1a4e1d205bdc816cb550d2064f2eb1ddc4c Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 17 Jan 2011 15:08:32 +0000 Subject: ARM: v6k: introduce CPU_V6K option Introduce a CPU_V6K configuration option for platforms to select if they have a V6K CPU core. This allows us to identify whether we need to support ARMv6 CPUs without the V6K SMP extensions at build time. Currently CPU_V6K is just an alias for CPU_V6, and all places which reference CPU_V6 are replaced by (CPU_V6 || CPU_V6K). Select CPU_V6K from platforms which are known to be V6K-only. Acked-by: Tony Lindgren Tested-by: Sourav Poddar Tested-by: Will Deacon Signed-off-by: Russell King --- arch/arm/boot/compressed/misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/boot/compressed/misc.c') diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index e653a6d3c8d9..4657e877bf8f 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -36,7 +36,7 @@ extern void error(char *x); #ifdef CONFIG_DEBUG_ICEDCC -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) static void icedcc_putc(int ch) { -- cgit v1.2.3 From dfad549d98b60160547d1b8299051b9456c8da85 Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Wed, 23 Mar 2011 22:46:15 +0100 Subject: ARM: 6826/1: Merge v6 and v7 DEBUG_LL DCC support The inline assembly differences for v6 vs. v7 are purely optimizations. On a v7 processor, an mrc with the pc sets the condition codes to the 28-31 bits of the register being read. It just so happens that the TX/RX full bits the DCC support code is testing for are high enough in the register to be put into the condition codes. On a v6 processor, this "feature" isn't implemented and thus we have to do the usual read, mask, test operations to check for TX/RX full. Thus, we can drop the v7 implementation and just use the v6 implementation for both. Cc: Tony Lindgren Signed-off-by: Stephen Boyd Signed-off-by: Russell King --- arch/arm/boot/compressed/head.S | 10 +--------- arch/arm/boot/compressed/misc.c | 12 +----------- arch/arm/kernel/debug.S | 19 +------------------ 3 files changed, 3 insertions(+), 38 deletions(-) (limited to 'arch/arm/boot/compressed/misc.c') diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 84ac4d656310..adf583cd0c35 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -21,20 +21,12 @@ #if defined(CONFIG_DEBUG_ICEDCC) -#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) .macro loadsp, rb, tmp .endm .macro writeb, ch, rb mcr p14, 0, \ch, c0, c5, 0 .endm -#elif defined(CONFIG_CPU_V7) - .macro loadsp, rb, tmp - .endm - .macro writeb, ch, rb -wait: mrc p14, 0, pc, c0, c1, 0 - bcs wait - mcr p14, 0, \ch, c0, c5, 0 - .endm #elif defined(CONFIG_CPU_XSCALE) .macro loadsp, rb, tmp .endm diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 4657e877bf8f..2df38263124c 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -36,7 +36,7 @@ extern void error(char *x); #ifdef CONFIG_DEBUG_ICEDCC -#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) static void icedcc_putc(int ch) { @@ -52,16 +52,6 @@ static void icedcc_putc(int ch) asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch)); } -#elif defined(CONFIG_CPU_V7) - -static void icedcc_putc(int ch) -{ - asm( - "wait: mrc p14, 0, pc, c0, c1, 0 \n\ - bcs wait \n\ - mcr p14, 0, %0, c0, c5, 0 " - : : "r" (ch)); -} #elif defined(CONFIG_CPU_XSCALE) diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index d2d983be096d..bcd66e00bdbe 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -25,7 +25,7 @@ .macro addruart, rp, rv .endm -#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) .macro senduart, rd, rx mcr p14, 0, \rd, c0, c5, 0 @@ -49,23 +49,6 @@ 1002: .endm -#elif defined(CONFIG_CPU_V7) - - .macro senduart, rd, rx - mcr p14, 0, \rd, c0, c5, 0 - .endm - - .macro busyuart, rd, rx -busy: mrc p14, 0, pc, c0, c1, 0 - bcs busy - .endm - - .macro waituart, rd, rx -wait: mrc p14, 0, pc, c0, c1, 0 - bcs wait - - .endm - #elif defined(CONFIG_CPU_XSCALE) .macro senduart, rd, rx -- cgit v1.2.3