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[mirror_ubuntu-focal-kernel.git] / arch / arm / mach-iop13xx / include / mach / memory.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_ARCH_MEMORY_H
3 #define __ASM_ARCH_MEMORY_H
4
5 #include <mach/hardware.h>
6
7 #ifndef __ASSEMBLY__
8
9 #if defined(CONFIG_ARCH_IOP13XX)
10 #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
11 #define IOP13XX_PMMR_V_END (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
12 #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
13 #define IOP13XX_PMMR_P_END (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
14
15 static inline dma_addr_t __virt_to_lbus(void __iomem *x)
16 {
17 return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
18 }
19
20 static inline void __iomem *__lbus_to_virt(dma_addr_t x)
21 {
22 return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
23 }
24
25 #define __is_lbus_dma(a) \
26 ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
27
28 #define __is_lbus_virt(a) \
29 ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
30
31 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
32 #define is_lbus_device(dev) \
33 (dev && strncmp(dev->bus->name, "platform", 8) == 0)
34
35 #define __arch_dma_to_virt(dev, addr) \
36 ({ \
37 void * __virt; \
38 dma_addr_t __dma = addr; \
39 if (is_lbus_device(dev) && __is_lbus_dma(__dma)) \
40 __virt = __lbus_to_virt(__dma); \
41 else \
42 __virt = (void *)__phys_to_virt(__dma); \
43 __virt; \
44 })
45
46 #define __arch_virt_to_dma(dev, addr) \
47 ({ \
48 void * __virt = addr; \
49 dma_addr_t __dma; \
50 if (is_lbus_device(dev) && __is_lbus_virt(__virt)) \
51 __dma = __virt_to_lbus(__virt); \
52 else \
53 __dma = __virt_to_phys((unsigned long)__virt); \
54 __dma; \
55 })
56
57 #define __arch_pfn_to_dma(dev, pfn) \
58 ({ \
59 /* __is_lbus_virt() can never be true for RAM pages */ \
60 (dma_addr_t)__pfn_to_phys(pfn); \
61 })
62
63 #define __arch_dma_to_pfn(dev, addr) __phys_to_pfn(addr)
64
65 #endif /* CONFIG_ARCH_IOP13XX */
66 #endif /* !ASSEMBLY */
67
68 #endif