root/arch/arm/mach-omap1/include/mach/memory.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/mach-omap1/include/mach/memory.h
   4  */
   5 
   6 #ifndef __ASM_ARCH_MEMORY_H
   7 #define __ASM_ARCH_MEMORY_H
   8 
   9 /* REVISIT: omap1 legacy drivers still rely on this */
  10 #include <mach/soc.h>
  11 
  12 /*
  13  * Bus address is physical address, except for OMAP-1510 Local Bus.
  14  * OMAP-1510 bus address is translated into a Local Bus address if the
  15  * OMAP bus type is lbus. We do the address translation based on the
  16  * device overriding the defaults used in the dma-mapping API.
  17  * Note that the is_lbus_device() test is not very efficient on 1510
  18  * because of the strncmp().
  19  */
  20 #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__)
  21 
  22 /*
  23  * OMAP-1510 Local Bus address offset
  24  */
  25 #define OMAP1510_LB_OFFSET      UL(0x30000000)
  26 
  27 #define virt_to_lbus(x)         ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
  28 #define lbus_to_virt(x)         ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
  29 #define is_lbus_device(dev)     (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
  30 
  31 #define __arch_pfn_to_dma(dev, pfn)     \
  32         ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
  33            if (is_lbus_device(dev)) \
  34                 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
  35            __dma; })
  36 
  37 #define __arch_dma_to_pfn(dev, addr)    \
  38         ({ dma_addr_t __dma = addr;                             \
  39            if (is_lbus_device(dev))                             \
  40                 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;      \
  41            __phys_to_pfn(__dma);                                \
  42         })
  43 
  44 #define __arch_dma_to_virt(dev, addr)   ({ (void *) (is_lbus_device(dev) ? \
  45                                                 lbus_to_virt(addr) : \
  46                                                 __phys_to_virt(addr)); })
  47 
  48 #define __arch_virt_to_dma(dev, addr)   ({ unsigned long __addr = (unsigned long)(addr); \
  49                                            (dma_addr_t) (is_lbus_device(dev) ? \
  50                                                 virt_to_lbus(__addr) : \
  51                                                 __virt_to_phys(__addr)); })
  52 
  53 #endif  /* CONFIG_ARCH_OMAP15XX */
  54 
  55 #endif