parisc/kernel/real2.S

14 #include <asm/asm-offsets.h>
45 /************************ 32-bit real-mode calls ***********************/
59 	STREG	%rp, -RP_OFFSET(%sp)	/* save RP */
63 	STREG	%r27, -1*REG_SZ(%sp)
64 	STREG	%r29, -2*REG_SZ(%sp)
66 	STREG	%sp, -REG_SZ(%arg0)	/* save SP on real-mode stack */
67 	copy	%arg0, %sp		/* adopt the real-mode SP */
73 	/* 32-bit calling convention passes first 4 args in registers */
75 	ldw	-8(%arg1), %arg2
76 	ldw	-12(%arg1), %arg3
77 	ldw	-4(%arg1), %arg1	/* obviously must do this one last! */
106 	LDREG	-REG_SZ(%sp), %sp	/* restore SP */
108 	LDREG	-1*REG_SZ(%sp), %r27
109 	LDREG	-2*REG_SZ(%sp), %r29
110 	ldo	-2*REG_SZ(%sp), %sp
113 	LDREG	-RP_OFFSET(%sp), %rp	/* restore RP */
120 #  define POP_CR(r, where) LDREG,mb -REG_SZ(where), %r1 ! mtctl %r1, r
154  * more general-purpose use by the several places which need RFIs
159 #if !defined(BOOTLOADER)
160 	/* switch to real mode... */
189 #endif /* defined(BOOTLOADER) */
197 #if !defined(BOOTLOADER)
226 #endif /* defined(BOOTLOADER) */
233 /************************ 64-bit real-mode calls ***********************/
244 	std	%rp, -0x10(%sp)		/* save RP */
245 	std	%sp, -8(%arg0)		/* save SP on real-mode stack */
246 	copy	%arg0, %sp		/* adopt the real-mode SP */
255 	/* 32-bit calling convention passes first 4 args in registers */
285 	ldd	-8(%sp), %sp		/* restore SP */
286 	ldd	-0x10(%sp), %rp		/* restore RP */
294 	/* http://lists.parisc-linux.org/hypermail/parisc-linux/10916.html