Initial import of mvmeppc.

1 files changed, 125 insertions, 0 deletions

diff --git a/sys/arch/mvmeppc/stand/bugcrt/crt.c b/sys/arch/mvmeppc/stand/bugcrt/crt.c
new file mode 100644
index 00000000000..992a907a481
--- /dev/null
+++ b/sys/arch/mvmeppc/stand/bugcrt/crt.c
@@ -0,0 +1,125 @@
+/*	$OpenBSD: crt.c,v 1.1 2001/06/26 21:58:02 smurph Exp $ */
+
+#include <sys/types.h>
+#include <machine/prom.h>
+
+struct mvmeprom_args bugargs = { 1};	       /* not BSS */
+
+/* pseudo reset vector */
+#if 0
+asm (".text");
+asm (STACK_ASM_OP);	/* initial sp value */
+asm (".long _start");	/* initial ip value */
+#endif
+_start()
+{
+	register int dev_lun asm (MVMEPROM_REG_DEVLUN);
+	register int ctrl_lun asm (MVMEPROM_REG_CTRLLUN);
+	register int flags asm (MVMEPROM_REG_SCSUPP);
+	register int ctrl_addr asm (MVMEPROM_REG_CTRLADDR);
+	register int entry asm (MVMEPROM_REG_ENTRY);
+	register int conf_blk asm (MVMEPROM_REG_IPA);
+	register char *arg_start asm (MVMEPROM_REG_ARGSTART);
+	register char *arg_end asm (MVMEPROM_REG_ARGEND);
+	register char *nbarg_start asm (MVMEPROM_REG_NBARGSTART);
+	register char *nbarg_end asm (MVMEPROM_REG_NBARGEND);
+	extern int edata, end;
+	struct mvmeprom_brdid *id, *mvmeprom_brdid();
+
+#ifdef notyet
+	/* 
+	 * This code enables the SFU1 and is used for single stage 
+	 * bootstraps or the first stage of a two stage bootstrap.
+	 * Do not use r10 to enable the SFU1. This wipes out
+	 * the netboot args.  Not cool at all... r25 seems free. 
+	 */
+	asm("|	enable SFU1");
+	asm("	ldcr	r25,cr1");
+	asm("	clr	r25,r25,1<3>"); /* bit 3 is SFU1D */
+	asm("	stcr	r25,cr1");
+#endif 
+	bugargs.dev_lun = dev_lun;
+	bugargs.ctrl_lun = ctrl_lun;
+	bugargs.flags = flags;
+	bugargs.ctrl_addr = ctrl_addr;
+	bugargs.entry = entry;
+	bugargs.conf_blk = conf_blk;
+	bugargs.arg_start = arg_start;
+	bugargs.arg_end = arg_end;
+	bugargs.nbarg_start = nbarg_start;
+	bugargs.nbarg_end = nbarg_end;
+	*bugargs.arg_end = 0;      
+	*bugargs.nbarg_end = 0;      
+
+	id = mvmeprom_brdid();
+	bugargs.cputyp = id->model;
+
+#ifdef notyet /* STAGE1 */
+	/* 
+	 * Initialize PSR and CMMU to a known, stable state. 
+	 * This has to be done early for MVME197.
+	 * Per EB162 mc88110 engineering bulletin.
+	 */
+	if (bugargs.cputyp == 0x197) {
+		asm("|	init MVME197");
+		asm("|	1. PSR");
+		asm("or.u   r2,r0,0xA200");
+		asm("or     r2,r2,0x03E2");
+		asm("stcr   r2,cr1");
+		asm("|	2. ICTL");
+		asm("or     r2,r0,r0");
+		asm("or     r2,r2,0x8000");
+		asm("or     r2,r2,0x0040");
+		asm("stcr   r2,cr26");
+		asm("|	3. DCTL");
+		asm("or     r2,r0,r0");
+		asm("or     r2,r2,0x2000");
+		asm("or     r2,r2,0x0040");
+		asm("stcr   r2,cr41");
+		asm("|	4. init cache");
+		asm("or     r2,r0,0x01");
+		asm("stcr   r2,cr25");
+		asm("stcr   r2,cr40");
+	}
+#endif
+
+	memset(&edata, 0, ((int)&end - (int)&edata));
+
+	asm  ("#	main()");
+	main();
+	mvmeprom_return();
+	/* NOTREACHED */
+}
+
+__main()
+{
+}
+
+void
+bugexec(addr)
+	void (*addr)();
+{
+	register int dev_lun asm (MVMEPROM_REG_DEVLUN);
+	register int ctrl_lun asm (MVMEPROM_REG_CTRLLUN);
+	register int flags asm (MVMEPROM_REG_SCSUPP);
+	register int ctrl_addr asm (MVMEPROM_REG_CTRLADDR);
+	register int entry asm (MVMEPROM_REG_ENTRY);
+	register int conf_blk asm (MVMEPROM_REG_IPA);
+	register char *arg_start asm (MVMEPROM_REG_ARGSTART);
+	register char *arg_end asm (MVMEPROM_REG_ARGEND);
+
+	dev_lun = bugargs.dev_lun;
+	ctrl_lun = bugargs.ctrl_lun;
+	flags = bugargs.flags;
+	ctrl_addr = bugargs.ctrl_addr;
+	entry = bugargs.entry;
+	conf_blk = bugargs.conf_blk;
+	arg_start = bugargs.arg_start;
+	arg_end = bugargs.arg_end;
+
+	(*addr)();
+	printf("bugexec: 0x%x returned!\n", addr);
+
+	_rtt();
+}
+