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Commit de8974e3 authored by Leonid Yegoshin's avatar Leonid Yegoshin Committed by Ralf Baechle
Browse files

MIPS: asm: r4kcache: Add EVA cache flushing functions 



Add EVA cache flushing functions similar to non-EVA configurations.
Because the cache may or may not contain user virtual addresses, we
need to use the 'cache' or 'cachee' instruction based on whether we
flush the cache on behalf of kernel or user respectively.

Signed-off-by: default avatarLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: default avatarMarkos Chandras <markos.chandras@imgtec.com>
parent a8053854

arch/mips/include/asm/r4kcache.h

+151 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <asm/cpu-features.h>

#include <asm/cpu-type.h>

#include <asm/mipsmtregs.h>

#include <asm/uaccess.h> /* for segment_eq() */



/*

 * This macro return a properly sign-extended address suitable as base address
@@ -374,6 +375,91 @@ static inline void invalidate_tcache_page(unsigned long addr) 
		: "r" (base),						\

		  "i" (op));



/*

 * Perform the cache operation specified by op using a user mode virtual

 * address while in kernel mode.

 */

#define cache16_unroll32_user(base,op)					\

	__asm__ __volatile__(						\

	"	.set push					\n"	\

	"	.set noreorder					\n"	\

	"	.set mips0					\n"	\

	"	.set eva					\n"	\

	"	cachee %1, 0x000(%0); cachee %1, 0x010(%0)	\n"	\

	"	cachee %1, 0x020(%0); cachee %1, 0x030(%0)	\n"	\

	"	cachee %1, 0x040(%0); cachee %1, 0x050(%0)	\n"	\

	"	cachee %1, 0x060(%0); cachee %1, 0x070(%0)	\n"	\

	"	cachee %1, 0x080(%0); cachee %1, 0x090(%0)	\n"	\

	"	cachee %1, 0x0a0(%0); cachee %1, 0x0b0(%0)	\n"	\

	"	cachee %1, 0x0c0(%0); cachee %1, 0x0d0(%0)	\n"	\

	"	cachee %1, 0x0e0(%0); cachee %1, 0x0f0(%0)	\n"	\

	"	cachee %1, 0x100(%0); cachee %1, 0x110(%0)	\n"	\

	"	cachee %1, 0x120(%0); cachee %1, 0x130(%0)	\n"	\

	"	cachee %1, 0x140(%0); cachee %1, 0x150(%0)	\n"	\

	"	cachee %1, 0x160(%0); cachee %1, 0x170(%0)	\n"	\

	"	cachee %1, 0x180(%0); cachee %1, 0x190(%0)	\n"	\

	"	cachee %1, 0x1a0(%0); cachee %1, 0x1b0(%0)	\n"	\

	"	cachee %1, 0x1c0(%0); cachee %1, 0x1d0(%0)	\n"	\

	"	cachee %1, 0x1e0(%0); cachee %1, 0x1f0(%0)	\n"	\

	"	.set pop					\n"	\

		:							\

		: "r" (base),						\

		  "i" (op));



#define cache32_unroll32_user(base, op)					\

	__asm__ __volatile__(						\

	"	.set push					\n"	\

	"	.set noreorder					\n"	\

	"	.set mips0					\n"	\

	"	.set eva					\n"	\

	"	cachee %1, 0x000(%0); cachee %1, 0x020(%0)	\n"	\

	"	cachee %1, 0x040(%0); cachee %1, 0x060(%0)	\n"	\

	"	cachee %1, 0x080(%0); cachee %1, 0x0a0(%0)	\n"	\

	"	cachee %1, 0x0c0(%0); cachee %1, 0x0e0(%0)	\n"	\

	"	cachee %1, 0x100(%0); cachee %1, 0x120(%0)	\n"	\

	"	cachee %1, 0x140(%0); cachee %1, 0x160(%0)	\n"	\

	"	cachee %1, 0x180(%0); cachee %1, 0x1a0(%0)	\n"	\

	"	cachee %1, 0x1c0(%0); cachee %1, 0x1e0(%0)	\n"	\

	"	cachee %1, 0x200(%0); cachee %1, 0x220(%0)	\n"	\

	"	cachee %1, 0x240(%0); cachee %1, 0x260(%0)	\n"	\

	"	cachee %1, 0x280(%0); cachee %1, 0x2a0(%0)	\n"	\

	"	cachee %1, 0x2c0(%0); cachee %1, 0x2e0(%0)	\n"	\

	"	cachee %1, 0x300(%0); cachee %1, 0x320(%0)	\n"	\

	"	cachee %1, 0x340(%0); cachee %1, 0x360(%0)	\n"	\

	"	cachee %1, 0x380(%0); cachee %1, 0x3a0(%0)	\n"	\

	"	cachee %1, 0x3c0(%0); cachee %1, 0x3e0(%0)	\n"	\

	"	.set pop					\n"	\

		:							\

		: "r" (base),						\

		  "i" (op));



#define cache64_unroll32_user(base, op)					\

	__asm__ __volatile__(						\

	"	.set push					\n"	\

	"	.set noreorder					\n"	\

	"	.set mips0					\n"	\

	"	.set eva					\n"	\

	"	cachee %1, 0x000(%0); cachee %1, 0x040(%0)	\n"	\

	"	cachee %1, 0x080(%0); cachee %1, 0x0c0(%0)	\n"	\

	"	cachee %1, 0x100(%0); cachee %1, 0x140(%0)	\n"	\

	"	cachee %1, 0x180(%0); cachee %1, 0x1c0(%0)	\n"	\

	"	cachee %1, 0x200(%0); cachee %1, 0x240(%0)	\n"	\

	"	cachee %1, 0x280(%0); cachee %1, 0x2c0(%0)	\n"	\

	"	cachee %1, 0x300(%0); cachee %1, 0x340(%0)	\n"	\

	"	cachee %1, 0x380(%0); cachee %1, 0x3c0(%0)	\n"	\

	"	cachee %1, 0x400(%0); cachee %1, 0x440(%0)	\n"	\

	"	cachee %1, 0x480(%0); cachee %1, 0x4c0(%0)	\n"	\

	"	cachee %1, 0x500(%0); cachee %1, 0x540(%0)	\n"	\

	"	cachee %1, 0x580(%0); cachee %1, 0x5c0(%0)	\n"	\

	"	cachee %1, 0x600(%0); cachee %1, 0x640(%0)	\n"	\

	"	cachee %1, 0x680(%0); cachee %1, 0x6c0(%0)	\n"	\

	"	cachee %1, 0x700(%0); cachee %1, 0x740(%0)	\n"	\

	"	cachee %1, 0x780(%0); cachee %1, 0x7c0(%0)	\n"	\

	"	.set pop					\n"	\

		:							\

		: "r" (base),						\

		  "i" (op));



/* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */

#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, extra)	\

static inline void extra##blast_##pfx##cache##lsize(void)		\
@@ -447,6 +533,32 @@ __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32 
__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )

__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, )



#define __BUILD_BLAST_USER_CACHE(pfx, desc, indexop, hitop, lsize) \

static inline void blast_##pfx##cache##lsize##_user_page(unsigned long page) \

{									\

	unsigned long start = page;					\

	unsigned long end = page + PAGE_SIZE;				\

									\

	__##pfx##flush_prologue						\

									\

	do {								\

		cache##lsize##_unroll32_user(start, hitop);             \

		start += lsize * 32;					\

	} while (start < end);						\

									\

	__##pfx##flush_epilogue						\

}



__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D,

			 16)

__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)

__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D,

			 32)

__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)

__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D,

			 64)

__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)



/* build blast_xxx_range, protected_blast_xxx_range */

#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, extra)	\

static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start, \
@@ -468,9 +580,47 @@ static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start, 
	__##pfx##flush_epilogue						\

}



#ifndef CONFIG_EVA



__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, )

__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_, )

__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_, )



#else



#define __BUILD_PROT_BLAST_CACHE_RANGE(pfx, desc, hitop)		\

static inline void protected_blast_##pfx##cache##_range(unsigned long start,\

							unsigned long end) \

{									\

	unsigned long lsize = cpu_##desc##_line_size();			\

	unsigned long addr = start & ~(lsize - 1);			\

	unsigned long aend = (end - 1) & ~(lsize - 1);			\

									\

	__##pfx##flush_prologue						\

									\

	if (segment_eq(get_fs(), USER_DS)) {				\

		while (1) {						\

			protected_cachee_op(hitop, addr);		\

			if (addr == aend)				\

				break;					\

			addr += lsize;					\

		}							\

	} else {							\

		while (1) {						\

			protected_cache_op(hitop, addr);		\

			if (addr == aend)				\

				break;					\

			addr += lsize;					\

		}                                                       \

									\

	}								\

	__##pfx##flush_epilogue						\

}



__BUILD_PROT_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D)

__BUILD_PROT_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I)



#endif

__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_, )

__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I_Loongson2, \

	protected_, loongson2_)

__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, , )