diff options
| author | Tony Lindgren <tony@atomide.com> | 2006-09-20 13:03:34 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-09-25 10:36:09 +0100 |
| commit | 7d95ded91149564100a3181d341361aedcfd5bf5 (patch) | |
| tree | 5be7882a7cc3f3c646f12c2c60cb7a689d46d0ba /arch/arm/boot | |
| parent | baf97ce6eda5891ee45fae9c1b06db855bb697e1 (diff) | |
| download | linux-7d95ded91149564100a3181d341361aedcfd5bf5.tar.gz | |
[ARM] 3838/1: ARM: DCC debug console support for ARM11
Adds support for CONFIG_DEBUG_ICEDCC for ARM11. Tested on ARM1136 (OMAP2420). Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/boot')
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 10 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/misc.c | 21 |
2 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 987c44160496..75df1f764a10 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -20,11 +20,21 @@ #ifdef DEBUG #if defined(CONFIG_DEBUG_ICEDCC) + +#ifdef CONFIG_CPU_V6 + .macro loadsp, rb + .endm + .macro writeb, ch, rb + mcr p14, 0, \ch, c0, c5, 0 + .endm +#else .macro loadsp, rb .endm .macro writeb, ch, rb mcr p14, 0, \ch, c0, c1, 0 .endm +#endif + #else #include <asm/arch/debug-macro.S> diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index ace3fb5835d9..283891c736c4 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -30,6 +30,25 @@ static void putstr(const char *ptr); #include <asm/arch/uncompress.h> #ifdef CONFIG_DEBUG_ICEDCC + +#ifdef CONFIG_CPU_V6 + +static void icedcc_putc(int ch) +{ + int status, i = 0x4000000; + + do { + if (--i < 0) + return; + + asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status)); + } while (status & (1 << 29)); + + asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch)); +} + +#else + static void icedcc_putc(int ch) { int status, i = 0x4000000; @@ -44,6 +63,8 @@ static void icedcc_putc(int ch) asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch)); } +#endif + #define putc(ch) icedcc_putc(ch) #define flush() do { } while (0) #endif |