[PATCH] i.MX25: Define address mapping macros

[PATCH] i.MX25: Define address mapping macros

[Matthias Kaehlcke]

Add macros for mapping physical addresses of i.MX25 registers to virtual
addresses

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
---
 arch/arm/plat-mxc/include/mach/mx25.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-mxc/include/mach/mx25.h b/arch/arm/plat-mxc/include/mach/mx25.h
index 4eb6e33..4821fcd 100644
--- a/arch/arm/plat-mxc/include/mach/mx25.h
+++ b/arch/arm/plat-mxc/include/mach/mx25.h
@@ -27,6 +27,19 @@
 	IMX_IO_ADDRESS(x, MX25_AIPS2) ?:			\
 	IMX_IO_ADDRESS(x, MX25_AVIC))
 
+/*
+ * define the address mapping macros: in physical address order
+ */
+
+#define MX25_AIPS1_IO_ADDRESS(x)  \
+	(((x) - MX25_AIPS1_BASE_ADDR) + MX25_AIPS1_BASE_ADDR_VIRT)
+
+#define MX25_AIPS2_IO_ADDRESS(x)  \
+	(((x) - MX25_AIPS2_BASE_ADDR) + MX25_AIPS2_BASE_ADDR_VIRT)
+
+#define MX25_AVIC_IO_ADDRESS(x)  \
+	(((x) - MX25_AVIC_BASE_ADDR) + MX25_AVIC_BASE_ADDR_VIRT)
+
 #define MX25_UART1_BASE_ADDR		0x43f90000
 #define MX25_UART2_BASE_ADDR		0x43f94000
 
-- 
1.6.5

[PATCH] i.MX25: Define address mapping macros

[Uwe Kleine-König]

Hello Matthias,

On Thu, Mar 25, 2010 at 09:50:57AM +0100, Matthias Kaehlcke wrote:
> Add macros for mapping physical addresses of i.MX25 registers to virtual
> addresses
Where do you need them?  MX25_IO_ADDRESS isn't enough?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-K?nig            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

[PATCH] i.MX25: Define address mapping macros

[Matthias Kaehlcke]

Hi Uwe,

El Thu, Mar 25, 2010 at 10:36:17AM +0100 Uwe Kleine-K?nig ha dit:

> Hello Matthias,
> 
> On Thu, Mar 25, 2010 at 09:50:57AM +0100, Matthias Kaehlcke wrote:
> > Add macros for mapping physical addresses of i.MX25 registers to virtual
> > addresses
> Where do you need them?  MX25_IO_ADDRESS isn't enough?

MX25_AIPS1_IO_ADDRESS is used in arch/arm/plat-mxc/include/mach/debug-macro.S:

#define UART_VADDR  MX25_AIPS1_IO_ADDRESS(UART1_BASE_ADDR)

i added the other two for completeness

-- 
Matthias Kaehlcke
Embedded Linux Developer
Barcelona

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                             (Isaac Newton)
                                                                 .''`.
    using free software / Debian GNU/Linux | http://debian.org  : :'  :
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[PATCH] i.MX25: Define address mapping macros

[Baruch Siach]

Hi Matthias,

On Thu, Mar 25, 2010 at 12:50:53PM +0100, Matthias Kaehlcke wrote:
> El Thu, Mar 25, 2010 at 10:36:17AM +0100 Uwe Kleine-K?nig ha dit:
> 
> > On Thu, Mar 25, 2010 at 09:50:57AM +0100, Matthias Kaehlcke wrote:
> > > Add macros for mapping physical addresses of i.MX25 registers to virtual
> > > addresses
> > Where do you need them?  MX25_IO_ADDRESS isn't enough?
> 
> MX25_AIPS1_IO_ADDRESS is used in arch/arm/plat-mxc/include/mach/debug-macro.S:
> 
> #define UART_VADDR  MX25_AIPS1_IO_ADDRESS(UART1_BASE_ADDR)
> 
> i added the other two for completeness

See http://thread.gmane.org/gmane.linux.ports.arm.kernel/75691 for a different 
approach, and discussion of the general problem.

baruch

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