Author: gonzo
Date: Sat Feb 23 22:46:26 2013
New Revision: 247204
URL: http://svnweb.freebsd.org/changeset/base/247204
Log:
Add macroses to properly map IO peripherals memory window from
ARM physical memory address space to VideoCore address space
Modified:
head/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h Sat Feb 23 22:00:59
2013 (r247203)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h Sat Feb 23 22:46:26
2013 (r247204)
@@ -34,14 +34,28 @@
#define _BCM2835_VCBUS_H_
#define BCM2835_VCBUS_SDRAM_CACHED 0x40000000
+#define BCM2835_VCBUS_IO_BASE 0x7E000000
#define BCM2835_VCBUS_SDRAM_UNCACHED 0xC0000000
+#define BCM2835_ARM_IO_BASE 0x20000000
+#define BCM2835_ARM_IO_SIZE 0x02000000
+
/*
* Convert physical address to VC bus address. Should be used
* when submitting address over mailbox interface
*/
#define PHYS_TO_VCBUS(pa) ((pa) + BCM2835_VCBUS_SDRAM_CACHED)
+/* Check whether pa bellong top IO window */
+#define BCM2835_ARM_IS_IO(pa) (((pa) >= BCM2835_ARM_IO_BASE) && \
+ ((pa) < BCM2835_ARM_IO_BASE + BCM2835_ARM_IO_SIZE))
+
+/*
+ * Convert physical address in IO space to VC bus address.
+ */
+#define IO_TO_VCBUS(pa) ((pa - BCM2835_ARM_IO_BASE) + \
+ BCM2835_VCBUS_IO_BASE)
+
/*
* Convert address from VC bus space to physical. Should be used
* when address is returned by VC over mailbox interface. e.g.
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