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Commit 43bc61d8 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Add register alignment helpers for shared flushers. 



This plugs in some register alignment helpers for the shared flushers,
allowing them to also be used on SH-5. The main rationale here is that
in the SH-5 case we have a variable ABI, where the pointer size may not
equal the register width. This register extension is taken care of by
the SH-5 code already today, and is otherwise unused on the SH-4 code.
This combines the two and allows us to kill off the SH-5 implementation.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 0837f524

arch/sh/include/asm/system_32.h

+5 −0
Original line number Diff line number Diff line
@@ -198,6 +198,11 @@ do { \ 
})

#endif



static inline reg_size_t register_align(void *val)

{

	return (unsigned long)(signed long)val;

}



int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,

			    struct mem_access *ma);

arch/sh/include/asm/system_64.h

+5 −0
Original line number Diff line number Diff line
@@ -37,4 +37,9 @@ do { \ 
#define jump_to_uncached()	do { } while (0)

#define back_to_cached()	do { } while (0)



static inline reg_size_t register_align(void *val)

{

	return (unsigned long long)(signed long long)(signed long)val;

}



#endif /* __ASM_SH_SYSTEM_64_H */

arch/sh/include/asm/types.h

+2 −0
Original line number Diff line number Diff line
@@ -11,8 +11,10 @@ 


#ifdef CONFIG_SUPERH32

typedef u16 insn_size_t;

typedef u32 reg_size_t;

#else

typedef u32 insn_size_t;

typedef u64 reg_size_t;

#endif



#endif /* __ASSEMBLY__ */

arch/sh/mm/flush-sh4.c

+12 −9
Original line number Diff line number Diff line
@@ -10,10 +10,11 @@ 
 */

void __weak __flush_wback_region(void *start, int size)

{

	unsigned long v, cnt, end;

	reg_size_t aligned_start, v, cnt, end;



	v = (unsigned long)start & ~(L1_CACHE_BYTES-1);

	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)

	aligned_start = register_align(start);

	v = aligned_start & ~(L1_CACHE_BYTES-1);

	end = (aligned_start + size + L1_CACHE_BYTES-1)

		& ~(L1_CACHE_BYTES-1);

	cnt = (end - v) / L1_CACHE_BYTES;
@@ -52,10 +53,11 @@ void __weak __flush_wback_region(void *start, int size) 
 */

void __weak __flush_purge_region(void *start, int size)

{

	unsigned long v, cnt, end;

	reg_size_t aligned_start, v, cnt, end;



	v = (unsigned long)start & ~(L1_CACHE_BYTES-1);

	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)

	aligned_start = register_align(start);

	v = aligned_start & ~(L1_CACHE_BYTES-1);

	end = (aligned_start + size + L1_CACHE_BYTES-1)

		& ~(L1_CACHE_BYTES-1);

	cnt = (end - v) / L1_CACHE_BYTES;
@@ -90,10 +92,11 @@ void __weak __flush_purge_region(void *start, int size) 
 */

void __weak __flush_invalidate_region(void *start, int size)

{

	unsigned long v, cnt, end;

	reg_size_t aligned_start, v, cnt, end;



	v = (unsigned long)start & ~(L1_CACHE_BYTES-1);

	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)

	aligned_start = register_align(start);

	v = aligned_start & ~(L1_CACHE_BYTES-1);

	end = (aligned_start + size + L1_CACHE_BYTES-1)

		& ~(L1_CACHE_BYTES-1);

	cnt = (end - v) / L1_CACHE_BYTES;