parisc/kernel/real2.S

14 #include <asm/asm-offsets.h>
32 /************************ 32-bit real-mode calls ***********************/
46 	STREG	%rp, -RP_OFFSET(%sp)	/* save RP */
50 	STREG	%r27, -1*REG_SZ(%sp)
51 	STREG	%r29, -2*REG_SZ(%sp)
53 	STREG	%sp, -REG_SZ(%arg0)	/* save SP on real-mode stack */
54 	copy	%arg0, %sp		/* adopt the real-mode SP */
60 	/* 32-bit calling convention passes first 4 args in registers */
62 	ldw	-8(%arg1), %arg2
63 	ldw	-12(%arg1), %arg3
64 	ldw	-4(%arg1), %arg1	/* obviously must do this one last! */
93 	LDREG	-REG_SZ(%sp), %sp	/* restore SP */
95 	LDREG	-1*REG_SZ(%sp), %r27
96 	LDREG	-2*REG_SZ(%sp), %r29
97 	ldo	-2*REG_SZ(%sp), %sp
100 	LDREG	-RP_OFFSET(%sp), %rp	/* restore RP */
107 #  define POP_CR(r, where) LDREG,mb -REG_SZ(where), %r1 ! mtctl %r1, r
141  * more general-purpose use by the several places which need RFIs
146 #if !defined(BOOTLOADER)
147 	/* switch to real mode... */
176 #endif /* defined(BOOTLOADER) */
184 #if !defined(BOOTLOADER)
213 #endif /* defined(BOOTLOADER) */
220 /************************ 64-bit real-mode calls ***********************/
231 	std	%rp, -0x10(%sp)		/* save RP */
232 	std	%sp, -8(%arg0)		/* save SP on real-mode stack */
233 	copy	%arg0, %sp		/* adopt the real-mode SP */
239 	/* 32-bit calling convention passes first 4 args in registers */
249 	/* set up real-mode stack and real-mode ap */
251 	ldo	-16(%sp), %r29			/* Reference param save area */
271 	ldd	-8(%sp), %sp		/* restore SP */
272 	ldd	-0x10(%sp), %rp		/* restore RP */
280 	/* http://lists.parisc-linux.org/hypermail/parisc-linux/10916.html