[net-next-2.6.git] / include / asm-mips / edac.h

#ifndef ASM_EDAC_H
#define ASM_EDAC_H

/* ECC atomic, DMA, SMP and interrupt safe scrub function */

static inline void atomic_scrub(void *va, u32 size)
{
	unsigned long *virt_addr = va;
	unsigned long temp;
	u32 i;

	for (i = 0; i < size / sizeof(unsigned long); i++) {
		/*
		 * Very carefully read and write to memory atomically
		 * so we are interrupt, DMA and SMP safe.
		 *
		 * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
		 */

		__asm__ __volatile__ (
		"	.set	mips2					\n"
		"1:	ll	%0, %1		# atomic_scrub		\n"
		"	addu	%0, $0					\n"
		"	sc	%0, %1					\n"
		"	beqz	%0, 1b					\n"
		"	.set	mips0					\n"
		: "=&r" (temp), "=m" (*virt_addr)
		: "m" (*virt_addr));

		virt_addr++;
	}
}

#endif
Commit	Line	Data
39c29657 DT	1	#ifndef ASM_EDAC_H
	2	#define ASM_EDAC_H
	3
	4	/* ECC atomic, DMA, SMP and interrupt safe scrub function */
	5
	6	static inline void atomic_scrub(void *va, u32 size)
	7	{
	8	unsigned long *virt_addr = va;
	9	unsigned long temp;
	10	u32 i;
	11
1bfa771e	12	for (i = 0; i < size / sizeof(unsigned long); i++) {
39c29657 DT	13	/*
	14	* Very carefully read and write to memory atomically
	15	* so we are interrupt, DMA and SMP safe.
	16	*
	17	* Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
	18	*/
	19
	20	__asm__ __volatile__ (
1bfa771e RB	21	" .set mips2 \n"
	22	"1: ll %0, %1 # atomic_scrub \n"
	23	" addu %0, $0 \n"
	24	" sc %0, %1 \n"
	25	" beqz %0, 1b \n"
	26	" .set mips0 \n"
39c29657 DT	27	: "=&r" (temp), "=m" (*virt_addr)
	28	: "m" (*virt_addr));
	29
1bfa771e	30	virt_addr++;
39c29657 DT	31	}
	32	}
	33
	34	#endif