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| author | Jeremy Kerr <jeremy.kerr@canonical.com> | 2010-07-06 18:30:06 +0800 |
|---|---|---|
| committer | Nicolas Pitre <nico@fluxnic.net> | 2010-10-20 00:27:33 -0400 |
| commit | 0ea1293009826da45e1019f45dfde1e557bb30df (patch) | |
| tree | 7111bcd355921f03415182845e5f236ffe1896f4 /arch/arm/mach-l7200 | |
| parent | 1ea64615601229f0dc16dee91dc5b50216411baa (diff) | |
| download | linux-0ea1293009826da45e1019f45dfde1e557bb30df.tar.gz linux-0ea1293009826da45e1019f45dfde1e557bb30df.tar.bz2 linux-0ea1293009826da45e1019f45dfde1e557bb30df.zip | |
arm: return both physical and virtual addresses from addruart
Rather than checking the MMU status in every instance of addruart, do it
once in kernel/debug.S, and change the existing addruart macros to
return both physical and virtual addresses. The main debug code can then
select the appropriate address to use.
This will also allow us to retreive the address of a uart for the MMU
state that we're not current in.
Updated with fixes for OMAP from Jason Wang <jason77.wang@gmail.com>
and Tony Lindgren <tony@atomide.com>, and fix for versatile express from
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-l7200')
| -rw-r--r-- | arch/arm/mach-l7200/include/mach/debug-macro.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm/mach-l7200/include/mach/debug-macro.S b/arch/arm/mach-l7200/include/mach/debug-macro.S new file mode 100644 index 000000000000..b0a2db77d392 --- /dev/null +++ b/arch/arm/mach-l7200/include/mach/debug-macro.S @@ -0,0 +1,38 @@ +/* arch/arm/mach-l7200/include/mach/debug-macro.S + * + * Debugging macro include header + * + * Copyright (C) 1994-1999 Russell King + * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * +*/ + + .equ io_virt, IO_BASE + .equ io_phys, IO_START + + .macro addruart, rp, rv + mov \rp, #0x00044000 @ UART1 +@ mov \rp, #0x00045000 @ UART2 + add \rv, \rp, #io_virt @ virtual address + add \rp, \rp, #io_phys @ physical base address + .endm + + .macro senduart,rd,rx + str \rd, [\rx, #0x0] @ UARTDR + .endm + + .macro waituart,rd,rx +1001: ldr \rd, [\rx, #0x18] @ UARTFLG + tst \rd, #1 << 5 @ UARTFLGUTXFF - 1 when full + bne 1001b + .endm + + .macro busyuart,rd,rx +1001: ldr \rd, [\rx, #0x18] @ UARTFLG + tst \rd, #1 << 3 @ UARTFLGUBUSY - 1 when busy + bne 1001b + .endm |