1 // SPDX-License-Identifier: GPL-2.0
3  * ip22-mc.c: Routines for manipulating SGI Memory Controller.
6  * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) - Indigo2 changes
7  * Copyright (C) 2003 Ladislav Michl  (ladis@linux-mips.org)
8  * Copyright (C) 2004 Peter Fuerst    (pf@net.alphadv.de) - IP28
30 …return (memconfig & SGIMC_MCONFIG_BASEADDR) << ((sgimc->systemid & SGIMC_SYSID_MASKREV) >= 5 ? 24 …  in get_bank_addr()
35 …return ((memconfig & SGIMC_MCONFIG_RMASK) + 0x0100) << ((sgimc->systemid & SGIMC_SYSID_MASKREV) >=…  in get_bank_size()
40 	unsigned int res = bank > 1 ? sgimc->mconfig1 : sgimc->mconfig0;  in get_bank_config()
55 	unsigned long addr, size;  in probe_memory()  local
64 		size = get_bank_size(tmp);  in probe_memory()
67 			i, size / 1024 / 1024, addr);  in probe_memory()
70 			memblock_add(addr, size);  in probe_memory()
84 	       (int) sgimc->systemid & SGIMC_SYSID_MASKREV);  in sgimc_init()
90 	/* Step 0: Make sure we turn off the watchdog in case it's  in sgimc_init()
94 	tmp = sgimc->cpuctrl0;  in sgimc_init()
96 	sgimc->cpuctrl0 = tmp;  in sgimc_init()
98 	/* Step 1: The CPU/GIO error status registers will not latch  in sgimc_init()
103 	sgimc->cstat = sgimc->gstat = 0;  in sgimc_init()
105 	/* Step 2: Enable all parity checking in cpu control register  in sgimc_init()
109 	tmp = sgimc->cpuctrl0;  in sgimc_init()
114 	sgimc->cpuctrl0 = tmp;  in sgimc_init()
116 	/* Step 3: Setup the MC write buffer depth, this is controlled  in sgimc_init()
119 	tmp = sgimc->cpuctrl1;  in sgimc_init()
122 	sgimc->cpuctrl1 = tmp;  in sgimc_init()
124 	/* Step 4: Initialize the RPSS divider register to run as fast  in sgimc_init()
128 	 *	   ----------------------------------------  in sgimc_init()
130 	 *	   ----------------------------------------  in sgimc_init()
138 	sgimc->divider = 0x101;  in sgimc_init()
140 	/* Step 5: Initialize GIO64 arbitrator configuration register.  in sgimc_init()
148 	tmp = sgimc->giopar & SGIMC_GIOPAR_GFX64; /* keep gfx 64bit settings */  in sgimc_init()
154 		if (SGIOC_SYSID_BOARDREV(sgioc->sysid) < 2) {  in sgimc_init()
170 	sgimc->giopar = tmp;	/* poof */  in sgimc_init()
188 	mconfig1 = sgimc->mconfig1;  in prom_cleanup()
190 	sgimc->mconfig1 = (mconfig1 & 0xffff0000) | 0x2060;  in prom_cleanup()
196 	sgimc->cmacc = (sgimc->cmacc & ~0xf) | 4;  in prom_cleanup()
199 	sgimc->mconfig1 = mconfig1;  in prom_cleanup()