patch-2.4.19 linux-2.4.19/arch/mips64/sgi-ip22/ip22-mc.c

• Lines: 159
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips64/sgi-ip22/ip22-mc.c
• Orig date: Sun Sep 9 10:43:02 2001

diff -urN linux-2.4.18/arch/mips64/sgi-ip22/ip22-mc.c linux-2.4.19/arch/mips64/sgi-ip22/ip22-mc.c
@@ -1,158 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- * Copyright (C) 2001 Ralf Baechle (ralf@gnu.org)
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-
-#include <asm/addrspace.h>
-#include <asm/ptrace.h>
-#include <asm/sgi/sgimc.h>
-#include <asm/sgi/sgihpc.h>
-
-/* #define DEBUG_SGIMC */
-
-struct sgimc_misc_ctrl *mcmisc_regs;
-u32 *rpsscounter;
-struct sgimc_dma_ctrl *dmactrlregs;
-
-static inline char *mconfig_string(unsigned long val)
-{
-	switch(val & SGIMC_MCONFIG_RMASK) {
-	case SGIMC_MCONFIG_FOURMB:
-		return "4MB";
-
-	case SGIMC_MCONFIG_EIGHTMB:
-		return "8MB";
-
-	case SGIMC_MCONFIG_SXTEENMB:
-		return "16MB";
-
-	case SGIMC_MCONFIG_TTWOMB:
-		return "32MB";
-
-	case SGIMC_MCONFIG_SFOURMB:
-		return "64MB";
-
-	case SGIMC_MCONFIG_OTEIGHTMB:
-		return "128MB";
-
-	default:
-		return "wheee, unknown";
-	};
-}
-
-void __init sgimc_init(void)
-{
-	unsigned long tmpreg;
-
-	mcmisc_regs = (struct sgimc_misc_ctrl *)(KSEG1+0x1fa00000);
-	rpsscounter = (u32 *) (KSEG1 + 0x1fa01004);
-	dmactrlregs = (struct sgimc_dma_ctrl *) (KSEG1+0x1fa02000);
-
-	printk("MC: SGI memory controller Revision %d\n",
-	       (int) mcmisc_regs->systemid & SGIMC_SYSID_MASKREV);
-
-#if 0 /* XXX Until I figure out what this bit really indicates XXX */
-	/* XXX Is this systemid bit reliable? */
-	if(mcmisc_regs->systemid & SGIMC_SYSID_EPRESENT) {
-		EISA_bus = 1;
-		printk("with EISA\n");
-	} else {
-		EISA_bus = 0;
-		printk("no EISA\n");
-	}
-#endif
-
-#ifdef DEBUG_SGIMC
-	prom_printf("sgimc_init: memconfig0<%s> mconfig1<%s>\n",
-		    mconfig_string(mcmisc_regs->mconfig0),
-		    mconfig_string(mcmisc_regs->mconfig1));
-
-	prom_printf("mcdump: cpuctrl0<%08lx> cpuctrl1<%08lx>\n",
-		    mcmisc_regs->cpuctrl0, mcmisc_regs->cpuctrl1);
-	prom_printf("mcdump: divider<%08lx>, gioparm<%04x>\n",
-		    mcmisc_regs->divider, mcmisc_regs->gioparm);
-#endif
-
-	/* Place the MC into a known state.  This must be done before
-	 * interrupts are first enabled etc.
-	 */
-
-	/* Step 1: The CPU/GIO error status registers will not latch
-	 *         up a new error status until the register has been
-	 *         cleared by the cpu.  These status registers are
-	 *         cleared by writing any value to them.
-	 */
-	mcmisc_regs->cstat = mcmisc_regs->gstat = 0;
-
-	/* Step 2: Enable all parity checking in cpu control register
-	 *         zero.
-	 */
-	tmpreg = mcmisc_regs->cpuctrl0;
-	tmpreg |= (SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM |
-		   SGIMC_CCTRL0_R4KNOCHKPARR);
-	mcmisc_regs->cpuctrl0 = tmpreg;
-
-	/* Step 3: Setup the MC write buffer depth, this is controlled
-	 *         in cpu control register 1 in the lower 4 bits.
-	 */
-	tmpreg = mcmisc_regs->cpuctrl1;
-	tmpreg &= ~0xf;
-	tmpreg |= 0xd;
-	mcmisc_regs->cpuctrl1 = tmpreg;
-
-	/* Step 4: Initialize the RPSS divider register to run as fast
-	 *         as it can correctly operate.  The register is laid
-	 *         out as follows:
-	 *
-	 *         ----------------------------------------
-	 *         |  RESERVED  |   INCREMENT   | DIVIDER |
-	 *         ----------------------------------------
-	 *          31        16 15            8 7       0
-	 *
-	 *         DIVIDER determines how often a 'tick' happens,
-	 *         INCREMENT determines by how the RPSS increment
-	 *         registers value increases at each 'tick'. Thus,
-	 *         for IP22 we get INCREMENT=1, DIVIDER=1 == 0x101
-	 */
-	mcmisc_regs->divider = 0x101;
-
-	/* Step 5: Initialize GIO64 arbitrator configuration register.
-	 *
-	 * NOTE: If you dork with startup code the HPC init code in
-	 *       sgihpc_init() must run before us because of how we
-	 *       need to know Guiness vs. FullHouse and the board
-	 *       revision on this machine.  You have been warned.
-	 */
-
-	/* First the basic invariants across all gio64 implementations. */
-	tmpreg = SGIMC_GIOPARM_HPC64;    /* All 1st HPC's interface at 64bits. */
-	tmpreg |= SGIMC_GIOPARM_ONEBUS;  /* Only one physical GIO bus exists. */
-
-	if(sgi_guiness) {
-		/* Guiness specific settings. */
-		tmpreg |= SGIMC_GIOPARM_EISA64;     /* MC talks to EISA at 64bits */
-		tmpreg |= SGIMC_GIOPARM_MASTEREISA; /* EISA bus can act as master */
-	} else {
-		/* Fullhouse specific settings. */
-		if(sgi_boardid < 2) {
-			tmpreg |= SGIMC_GIOPARM_HPC264; /* 2nd HPC at 64bits */
-			tmpreg |= SGIMC_GIOPARM_PLINEEXP0; /* exp0 pipelines */
-			tmpreg |= SGIMC_GIOPARM_MASTEREXP1;/* exp1 masters */
-			tmpreg |= SGIMC_GIOPARM_RTIMEEXP0; /* exp0 is realtime */
-		} else {
-			tmpreg |= SGIMC_GIOPARM_HPC264; /* 2nd HPC 64bits */
-			tmpreg |= SGIMC_GIOPARM_PLINEEXP0; /* exp[01] pipelined */
-			tmpreg |= SGIMC_GIOPARM_PLINEEXP1;
-			tmpreg |= SGIMC_GIOPARM_MASTEREISA;/* EISA masters */
-			/* someone forgot this poor little guy... */
-			tmpreg |= SGIMC_GIOPARM_GFX64; 	/* GFX at 64 bits */
-		}
-	}
-	mcmisc_regs->gioparm = tmpreg; /* poof */
-}