patch-2.1.44 linux/arch/mips/sgi/prom/misc.c

• Lines: 120
• Date: Thu Jun 26 12:33:38 1997
• Orig file: v2.1.43/linux/arch/mips/sgi/prom/misc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/sgi/prom/misc.c linux/arch/mips/sgi/prom/misc.c
@@ -0,0 +1,119 @@
+/*
+ * misc.c: Miscellaneous ARCS PROM routines.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+#include <asm/system.h>
+
+extern unsigned long mips_cputype;
+extern int initialize_kbd(void);
+extern void *sgiwd93_host;
+extern void reset_wd33c93(void *instance);
+
+static inline void shutoff_r4600_cache(void)
+{
+	unsigned long tmp1, tmp2, tmp3;
+
+	if(mips_cputype != CPU_R4600 &&
+	   mips_cputype != CPU_R4640 &&
+	   mips_cputype != CPU_R4700)
+		return;
+	printk("Disabling R4600 SCACHE\n");
+	__asm__ __volatile__("
+	.set noreorder
+	.set mips3
+	li	%0, 0x1
+	dsll	%0, 31
+	lui	%1, 0x9000
+	dsll32	%1, 0
+	or	%0, %1, %0
+	mfc0	%2, $12
+	nop; nop; nop; nop;
+	li	%1, 0x80
+	mtc0	%1, $12
+	nop; nop; nop; nop;
+	sh	$0, 0(%0)
+	mtc0	$0, $12
+	nop; nop; nop; nop;
+	mtc0	%2, $12
+	nop; nop; nop; nop;
+	.set mips2
+	.set reorder
+        " : "=r" (tmp1), "=r" (tmp2), "=r" (tmp3));
+}
+
+void prom_halt(void)
+{
+	shutoff_r4600_cache();
+	initialize_kbd();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	cli();
+	romvec->halt();
+}
+
+void prom_powerdown(void)
+{
+	shutoff_r4600_cache();
+	initialize_kbd();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	cli();
+	romvec->pdown();
+}
+
+/* XXX is this a soft reset basically? XXX */
+void prom_restart(void)
+{
+	shutoff_r4600_cache();
+	initialize_kbd();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	cli();
+	romvec->restart();
+}
+
+void prom_reboot(void)
+{
+	shutoff_r4600_cache();
+	initialize_kbd();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	cli();
+	romvec->reboot();
+}
+
+void prom_imode(void)
+{
+	shutoff_r4600_cache();
+	initialize_kbd();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	cli();
+	romvec->imode();
+}
+
+long prom_cfgsave(void)
+{
+	return romvec->cfg_save();
+}
+
+struct linux_sysid *prom_getsysid(void)
+{
+	return romvec->get_sysid();
+}
+
+void prom_cacheflush(void)
+{
+	romvec->cache_flush();
+}