Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef __ASM_SH_UNCACHED_H |
| 3 | #define __ASM_SH_UNCACHED_H |
| 4 | |
| 5 | #include <linux/bug.h> |
| 6 | |
| 7 | #ifdef CONFIG_UNCACHED_MAPPING |
| 8 | extern unsigned long cached_to_uncached; |
| 9 | extern unsigned long uncached_size; |
| 10 | extern unsigned long uncached_start, uncached_end; |
| 11 | |
| 12 | extern int virt_addr_uncached(unsigned long kaddr); |
| 13 | extern void uncached_init(void); |
| 14 | extern void uncached_resize(unsigned long size); |
| 15 | |
| 16 | /* |
| 17 | * Jump to uncached area. |
| 18 | * When handling TLB or caches, we need to do it from an uncached area. |
| 19 | */ |
| 20 | #define jump_to_uncached() \ |
| 21 | do { \ |
| 22 | unsigned long __dummy; \ |
| 23 | \ |
| 24 | __asm__ __volatile__( \ |
| 25 | "mova 1f, %0\n\t" \ |
| 26 | "add %1, %0\n\t" \ |
| 27 | "jmp @%0\n\t" \ |
| 28 | " nop\n\t" \ |
| 29 | ".balign 4\n" \ |
| 30 | "1:" \ |
| 31 | : "=&z" (__dummy) \ |
| 32 | : "r" (cached_to_uncached)); \ |
| 33 | } while (0) |
| 34 | |
| 35 | /* |
| 36 | * Back to cached area. |
| 37 | */ |
| 38 | #define back_to_cached() \ |
| 39 | do { \ |
| 40 | unsigned long __dummy; \ |
| 41 | ctrl_barrier(); \ |
| 42 | __asm__ __volatile__( \ |
| 43 | "mov.l 1f, %0\n\t" \ |
| 44 | "jmp @%0\n\t" \ |
| 45 | " nop\n\t" \ |
| 46 | ".balign 4\n" \ |
| 47 | "1: .long 2f\n" \ |
| 48 | "2:" \ |
| 49 | : "=&r" (__dummy)); \ |
| 50 | } while (0) |
| 51 | #else |
| 52 | #define virt_addr_uncached(kaddr) (0) |
| 53 | #define uncached_init() do { } while (0) |
| 54 | #define uncached_resize(size) BUG() |
| 55 | #define jump_to_uncached() do { } while (0) |
| 56 | #define back_to_cached() do { } while (0) |
| 57 | #endif |
| 58 | |
| 59 | #endif /* __ASM_SH_UNCACHED_H */ |
| 60 |
Warning: This file is not a C or C++ file. It does not have highlighting.