/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_SH_UNCACHED_H #define __ASM_SH_UNCACHED_H #include <linux/bug.h> #ifdef CONFIG_UNCACHED_MAPPING extern unsigned long cached_to_uncached; extern unsigned long uncached_size; extern unsigned long uncached_start, uncached_end; extern int virt_addr_uncached(unsigned long kaddr); extern void uncached_init(void); extern void uncached_resize(unsigned long size); /* * Jump to uncached area. * When handling TLB or caches, we need to do it from an uncached area. */ #define jump_to_uncached() \ do { \ unsigned long __dummy; \ \ __asm__ __volatile__( \ "mova 1f, %0\n\t" \ "add %1, %0\n\t" \ "jmp @%0\n\t" \ " nop\n\t" \ ".balign 4\n" \ "1:" \ : "=&z" (__dummy) \ : "r" (cached_to_uncached)); \ } while (0) /* * Back to cached area. */ #define back_to_cached() \ do { \ unsigned long __dummy; \ ctrl_barrier(); \ __asm__ __volatile__( \ "mov.l 1f, %0\n\t" \ "jmp @%0\n\t" \ " nop\n\t" \ ".balign 4\n" \ "1: .long 2f\n" \ "2:" \ : "=&r" (__dummy)); \ } while (0) #else #define virt_addr_uncached(kaddr) (0) #define uncached_init() do { } while (0) #define uncached_resize(size) BUG() #define jump_to_uncached() do { } while (0) #define back_to_cached() do { } while (0) #endif #endif /* __ASM_SH_UNCACHED_H */