diff options
| author | Jean-Christop PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2009-02-25 04:20:40 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-02-27 21:57:46 +0100 |
| commit | c633c3cfcf41efe720020553aa3d4782fa0b9bd5 (patch) | |
| tree | b7de4fc54682dcbf1c89ca8374a55ce3851be685 /arch | |
| parent | Merge branch 'dma' into devel (diff) | |
| download | linux-c633c3cfcf41efe720020553aa3d4782fa0b9bd5.tar.xz linux-c633c3cfcf41efe720020553aa3d4782fa0b9bd5.zip | |
[ARM] 5412/1: XSCALE: add ice dcc support
SCALE: add ice dcc support
Tested on the ixp425 with the ice PEEDI
Ack-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig.debug | 2 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 6 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/misc.c | 15 | ||||
| -rw-r--r-- | arch/arm/kernel/debug.S | 27 |
4 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 35f8db35f442..a71fd941ade7 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -77,7 +77,7 @@ config DEBUG_ICEDCC Say Y here if you want the debug print routines to direct their output to the EmbeddedICE macrocell's DCC channel using co-processor 14. This is known to work on the ARM9 style ICE - channel. + channel and on the XScale with the PEEDI. It does include a timeout to ensure that the system does not totally freeze when there is nothing connected to read. diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 77d614232d81..d1b678dc120b 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -27,6 +27,12 @@ .macro writeb, ch, rb mcr p14, 0, \ch, c0, c5, 0 .endm +#elif defined(CONFIG_CPU_XSCALE) + .macro loadsp, rb + .endm + .macro writeb, ch, rb + mcr p14, 0, \ch, c8, c0, 0 + .endm #else .macro loadsp, rb .endm diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 3fc08413fff0..393c81641314 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -46,6 +46,21 @@ static void icedcc_putc(int ch) asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch)); } +#elif defined(CONFIG_CPU_XSCALE) + +static void icedcc_putc(int ch) +{ + int status, i = 0x4000000; + + do { + if (--i < 0) + return; + + asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status)); + } while (status & (1 << 28)); + + asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch)); +} #else diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index f53c58290543..b121b6053cce 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -49,6 +49,33 @@ 1002: .endm +#elif defined(CONFIG_CPU_XSCALE) + + .macro addruart, rx + .endm + + .macro senduart, rd, rx + mcr p14, 0, \rd, c8, c0, 0 + .endm + + .macro busyuart, rd, rx +1001: + mrc p14, 0, \rx, c14, c0, 0 + tst \rx, #0x10000000 + beq 1001b + .endm + + .macro waituart, rd, rx + mov \rd, #0x10000000 +1001: + subs \rd, \rd, #1 + bmi 1002f + mrc p14, 0, \rx, c14, c0, 0 + tst \rx, #0x10000000 + bne 1001b +1002: + .endm + #else .macro addruart, rx |