From dc295ed278eb0235154462b23615e89213bc591c Mon Sep 17 00:00:00 2001
From: dfr <dfr@FreeBSD.org>
Date: Sun, 14 Jun 1998 13:46:10 +0000
Subject: Major changes to the generic device framework for FreeBSD/alpha:

* Eliminate bus_t and make it possible for all devices to have
  attached children.

* Support dynamically extendable interfaces for drivers to replace
  both the function pointers in driver_t and bus_ops_t (which has been
  removed entirely.  Two system defined interfaces have been defined,
  'device' which is mandatory for all devices and 'bus' which is
  recommended for all devices which support attached children.

* In addition, the alpha port defines two simple interfaces 'clock'
  for attaching various real time clocks to the system and 'mcclock'
  for the many different variations of mc146818 clocks which can be
  attached to different alpha platforms.  This eliminates two more
  function pointer tables in favour of the generic method dispatch
  system provided by the device framework.

Future device interfaces may include:

* cdev and bdev interfaces for devfs to use in replacement for specfs
  and the fixed interfaces bdevsw and cdevsw.

* scsi interface to replace struct scsi_adapter (not sure how this
  works in CAM but I imagine there is something similar there).

* various tailored interfaces for different bus types such as pci,
  isa, pccard etc.
---
 sys/dev/mc146818/mc146818reg.h | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

(limited to 'sys/dev/mc146818')

diff --git a/sys/dev/mc146818/mc146818reg.h b/sys/dev/mc146818/mc146818reg.h
index 95c3ccf..18cc979 100644
--- a/sys/dev/mc146818/mc146818reg.h
+++ b/sys/dev/mc146818/mc146818reg.h
@@ -142,14 +142,6 @@
 #define	MC_BASE_NONE	0x60		/* actually, both of these reset */
 #define	MC_BASE_RESET	0x70
 
-
-/*
- * RTC register/NVRAM read and write functions -- machine-dependent.
- * Appropriately manipulate RTC registers to get/put data values.
- */
-u_int mc146818_read __P((void *sc, u_int reg));
-void mc146818_write __P((void *sc, u_int reg, u_int datum));
-
 /*
  * A collection of TOD/Alarm registers.
  */
@@ -159,36 +151,36 @@ typedef u_int mc_todregs[MC_NTODREGS];
  * Get all of the TOD/Alarm registers
  * Must be called at splhigh(), and with the RTC properly set up.
  */
-#define MC146818_GETTOD(sc, regs)					\
+#define MC146818_GETTOD(dev, regs)					\
 	do {								\
 		int i;							\
 									\
 		/* update in progress; spin loop */			\
-		while (mc146818_read(sc, MC_REGA) & MC_REGA_UIP)	\
+		while (MCCLOCK_READ(dev, MC_REGA) & MC_REGA_UIP)	\
 			;						\
 									\
 		/* read all of the tod/alarm regs */			\
 		for (i = 0; i < MC_NTODREGS; i++)			\
-			(*regs)[i] = mc146818_read(sc, i);		\
+			(*regs)[i] = MCCLOCK_READ(dev, i);		\
 	} while (0);
 
 /*
  * Set all of the TOD/Alarm registers
  * Must be called at splhigh(), and with the RTC properly set up.
  */
-#define MC146818_PUTTOD(sc, regs)					\
+#define MC146818_PUTTOD(dev, regs)					\
 	do {								\
 		int i;							\
 									\
 		/* stop updates while setting */			\
-		mc146818_write(sc, MC_REGB,				\
-		    mc146818_read(sc, MC_REGB) | MC_REGB_SET);		\
+		MCCLOCK_WRITE(dev, MC_REGB,				\
+		    MCCLOCK_READ(dev, MC_REGB) | MC_REGB_SET);		\
 									\
 		/* write all of the tod/alarm regs */			\
 		for (i = 0; i < MC_NTODREGS; i++)			\
-			mc146818_write(sc, i, (*regs)[i]);		\
+			MCCLOCK_WRITE(dev, i, (*regs)[i]);		\
 									\
 		/* reenable updates */					\
-		mc146818_write(sc, MC_REGB,				\
-		    mc146818_read(sc, MC_REGB) & ~MC_REGB_SET);		\
+		MCCLOCK_WRITE(dev, MC_REGB,				\
+		    MCCLOCK_READ(dev, MC_REGB) & ~MC_REGB_SET);		\
 	} while (0);
-- 
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