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dm: Introduce dev_phys_to_bus()/dev_bus_to_phys() 

These functions, instead of relying on hard-coded platform-specific
address translations, make use of the DMA constraints provided by the DM
core. This allows for per-device translations.

We can't yet get rid of the legacy phys_to_bus()/bus_to_phys()
implementations as some of its users are not integrated into the
device model.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
This commit is contained in:
Nicolas Saenz Julienne 2021-01-12 13:55:26 +01:00 committed by Matthias Brugger
parent e88018769c
commit 2a15a25c36
1 changed files with 17 additions and 0 deletions
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17
include/phys2bus.h
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@ -21,4 +21,21 @@ static inline unsigned long bus_to_phys(unsigned long bus)
}
#endif
#if CONFIG_IS_ENABLED(DM)
#include <dm/device.h>
static inline dma_addr_t dev_phys_to_bus(struct udevice *dev, phys_addr_t phys)
{
return phys - dev_get_dma_offset(dev);
}
static inline phys_addr_t dev_bus_to_phys(struct udevice *dev, dma_addr_t bus)
{
return bus + dev_get_dma_offset(dev);
}
#else
#define dev_phys_to_bus(_, _addr) _addr
#define dev_bus_to_phys(_, _addr) _addr
#endif
#endif