1 /* $Id: sgimc.h,v 1.1.1.1 1997/06/01 03:17:13 ralf Exp $
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
7 * sgimc.h: Definitions for memory controller hardware found on
8 * SGI IP20, IP22, IP26, and IP28 machines.
10 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
11 * Copyright (C) 1999 Ralf Baechle
12 * Copyright (C) 1999 Silicon Graphics, Inc.
14 #ifndef _ASM_SGI_SGIMC_H
15 #define _ASM_SGI_SGIMC_H
17 struct sgimc_misc_ctrl {
19 volatile u32 cpuctrl0; /* CPU control register 0, readwrite */
20 #define SGIMC_CCTRL0_REFS 0x0000000f /* REFS mask */
21 #define SGIMC_CCTRL0_EREFRESH 0x00000010 /* Memory refresh enable */
22 #define SGIMC_CCTRL0_EPERRGIO 0x00000020 /* GIO parity error enable */
23 #define SGIMC_CCTRL0_EPERRMEM 0x00000040 /* Main mem parity error enable */
24 #define SGIMC_CCTRL0_EPERRCPU 0x00000080 /* CPU bus parity error enable */
25 #define SGIMC_CCTRL0_WDOG 0x00000100 /* Watchdog timer enable */
26 #define SGIMC_CCTRL0_SYSINIT 0x00000200 /* System init bit */
27 #define SGIMC_CCTRL0_GFXRESET 0x00000400 /* Graphics interface reset */
28 #define SGIMC_CCTRL0_EISALOCK 0x00000800 /* Lock CPU from memory for EISA */
29 #define SGIMC_CCTRL0_EPERRSCMD 0x00001000 /* SysCMD bus parity error enable */
30 #define SGIMC_CCTRL0_IENAB 0x00002000 /* Allow interrupts from MC */
31 #define SGIMC_CCTRL0_ESNOOP 0x00004000 /* Snooping I/O enable */
32 #define SGIMC_CCTRL0_EPROMWR 0x00008000 /* Prom writes from cpu enable */
33 #define SGIMC_CCTRL0_WRESETPMEM 0x00010000 /* Perform warm reset, preserves mem */
34 #define SGIMC_CCTRL0_LENDIAN 0x00020000 /* Put MC in little-endian mode */
35 #define SGIMC_CCTRL0_WRESETDMEM 0x00040000 /* Warm reset, destroys mem contents */
36 #define SGIMC_CCTRL0_CMEMBADPAR 0x02000000 /* Generate bad perr from cpu to mem */
37 #define SGIMC_CCTRL0_R4KNOCHKPARR 0x04000000 /* Don't chk parity on mem data reads */
38 #define SGIMC_CCTRL0_GIOBTOB 0x08000000 /* Allow GIO back to back writes */
41 volatile u32 cpuctrl1; /* CPU control register 1, readwrite */
42 #define SGIMC_CCTRL1_EGIOTIMEO 0x00000010 /* GIO bus timeout enable */
43 #define SGIMC_CCTRL1_FIXEDEHPC 0x00001000 /* Fixed HPC endianness */
44 #define SGIMC_CCTRL1_LITTLEHPC 0x00002000 /* Little endian HPC */
45 #define SGIMC_CCTRL1_FIXEDEEXP0 0x00004000 /* Fixed EXP0 endianness */
46 #define SGIMC_CCTRL1_LITTLEEXP0 0x00008000 /* Little endian EXP0 */
47 #define SGIMC_CCTRL1_FIXEDEEXP1 0x00010000 /* Fixed EXP1 endianness */
48 #define SGIMC_CCTRL1_LITTLEEXP1 0x00020000 /* Little endian EXP1 */
51 volatile u32 watchdogt; /* Watchdog reg rdonly, write clears */
54 volatile u32 systemid; /* MC system ID register, readonly */
55 #define SGIMC_SYSID_MASKREV 0x0000000f /* Revision of MC controller */
56 #define SGIMC_SYSID_EPRESENT 0x00000010 /* Indicates presence of EISA bus */
59 volatile u32 divider; /* Divider reg for RPSS */
62 volatile unsigned char eeprom; /* EEPROM byte reg for r4k */
63 #define SGIMC_EEPROM_PRE 0x00000001 /* eeprom chip PRE pin assertion */
64 #define SGIMC_EEPROM_CSEL 0x00000002 /* Active high, eeprom chip select */
65 #define SGIMC_EEPROM_SECLOCK 0x00000004 /* EEPROM serial clock */
66 #define SGIMC_EEPROM_SDATAO 0x00000008 /* Serial EEPROM data-out */
67 #define SGIMC_EEPROM_SDATAI 0x00000010 /* Serial EEPROM data-in */
69 unsigned char _unused7[3];
71 volatile unsigned short rcntpre; /* Preload refresh counter */
73 unsigned short _unused9;
75 volatile unsigned short rcounter; /* Readonly refresh counter */
77 unsigned short _unused10;
79 volatile u32 gioparm; /* Parameter word for GIO64 */
80 #define SGIMC_GIOPARM_HPC64 0x00000001 /* HPC talks to GIO using 64-bits */
81 #define SGIMC_GIOPARM_GFX64 0x00000002 /* GFX talks to GIO using 64-bits */
82 #define SGIMC_GIOPARM_EXP064 0x00000004 /* EXP(slot0) talks using 64-bits */
83 #define SGIMC_GIOPARM_EXP164 0x00000008 /* EXP(slot1) talks using 64-bits */
84 #define SGIMC_GIOPARM_EISA64 0x00000010 /* EISA bus talks 64-bits to GIO */
85 #define SGIMC_GIOPARM_HPC264 0x00000020 /* 2nd HPX talks 64-bits to GIO */
86 #define SGIMC_GIOPARM_RTIMEGFX 0x00000040 /* GFX device has realtime attr */
87 #define SGIMC_GIOPARM_RTIMEEXP0 0x00000080 /* EXP(slot0) has realtime attr */
88 #define SGIMC_GIOPARM_RTIMEEXP1 0x00000100 /* EXP(slot1) has realtime attr */
89 #define SGIMC_GIOPARM_MASTEREISA 0x00000200 /* EISA bus can act as bus master */
90 #define SGIMC_GIOPARM_ONEBUS 0x00000400 /* Exists one GIO64 pipelined bus */
91 #define SGIMC_GIOPARM_MASTERGFX 0x00000800 /* GFX can act as a bus master */
92 #define SGIMC_GIOPARM_MASTEREXP0 0x00001000 /* EXP(slot0) can bus master */
93 #define SGIMC_GIOPARM_MASTEREXP1 0x00002000 /* EXP(slot1) can bus master */
94 #define SGIMC_GIOPARM_PLINEEXP0 0x00004000 /* EXP(slot0) has pipeline attr */
95 #define SGIMC_GIOPARM_PLINEEXP1 0x00008000 /* EXP(slot1) has pipeline attr */
98 volatile unsigned short cputp; /* CPU bus arb time period */
100 unsigned short _unused14;
102 volatile unsigned short lbursttp; /* Time period for long bursts */
104 unsigned short _unused16;
106 volatile u32 mconfig0; /* Memory config register zero */
108 volatile u32 mconfig1; /* Memory config register one */
110 /* These defines apply to both mconfig registers above. */
111 #define SGIMC_MCONFIG_FOURMB 0x00000000 /* Physical ram = 4megs */
112 #define SGIMC_MCONFIG_EIGHTMB 0x00000100 /* Physical ram = 8megs */
113 #define SGIMC_MCONFIG_SXTEENMB 0x00000300 /* Physical ram = 16megs */
114 #define SGIMC_MCONFIG_TTWOMB 0x00000700 /* Physical ram = 32megs */
115 #define SGIMC_MCONFIG_SFOURMB 0x00000f00 /* Physical ram = 64megs */
116 #define SGIMC_MCONFIG_OTEIGHTMB 0x00001f00 /* Physical ram = 128megs */
117 #define SGIMC_MCONFIG_RMASK 0x00001f00 /* Ram config bitmask */
120 volatile u32 cmacc; /* Mem access config for CPU */
122 volatile u32 gmacc; /* Mem access config for GIO */
124 /* This define applies to both cmacc and gmacc registers above. */
125 #define SGIMC_MACC_ALIASBIG 0x20000000 /* 512MB home for alias */
127 /* Error address/status regs from GIO and CPU perspectives. */
129 volatile u32 cerr; /* Error address reg for CPU */
131 volatile u32 cstat; /* Status reg for CPU */
133 volatile u32 gerr; /* Error address reg for GIO */
135 volatile u32 gstat; /* Status reg for GIO */
137 /* Special hard bus locking registers. */
139 volatile unsigned char syssembit; /* Uni-bit system semaphore */
140 unsigned char _unused26[3];
142 volatile unsigned char mlock; /* Global GIO memory access lock */
143 unsigned char _unused28[3];
145 volatile unsigned char elock; /* Locks EISA from GIO accesses */
147 /* GIO dma control registers. */
148 unsigned char _unused30[3];
150 volatile u32 gio_dma_trans;/* DMA mask to translation GIO addrs */
152 volatile u32 gio_dma_sbits;/* DMA GIO addr substitution bits */
154 volatile u32 dma_intr_cause; /* DMA IRQ cause indicator bits */
156 volatile u32 dma_ctrl; /* Main DMA control reg */
158 /* DMA TLB entry 0 */
160 volatile u32 dtlb_hi0;
162 volatile u32 dtlb_lo0;
164 /* DMA TLB entry 1 */
166 volatile u32 dtlb_hi1;
168 volatile u32 dtlb_lo1;
170 /* DMA TLB entry 2 */
172 volatile u32 dtlb_hi2;
174 volatile u32 dtlb_lo2;
176 /* DMA TLB entry 3 */
178 volatile u32 dtlb_hi3;
180 volatile u32 dtlb_lo3;
183 /* MC misc control registers live at physical 0x1fa00000. */
184 extern struct sgimc_misc_ctrl *mcmisc_regs;
185 extern u32 *rpsscounter; /* Chirps at 100ns */
187 struct sgimc_dma_ctrl {
189 volatile u32 maddronly; /* Address DMA goes at */
191 volatile u32 maddrpdeflts; /* Same as above, plus set defaults */
193 volatile u32 dmasz; /* DMA count */
195 volatile u32 ssize; /* DMA stride size */
197 volatile u32 gmaddronly; /* Set GIO DMA but do not start trans */
199 volatile u32 dmaddnpgo; /* Set GIO DMA addr + start transfer */
201 volatile u32 dmamode; /* DMA mode config bit settings */
203 volatile u32 dmacount; /* Zoom and byte count for DMA */
205 volatile u32 dmastart; /* Pedal to the metal. */
207 volatile u32 dmarunning; /* DMA op is in progress */
210 /* Set dma addr, defaults, and kick it */
211 volatile u32 maddr_defl_go; /* go go go! -lm */
214 /* MC controller dma regs live at physical 0x1fa02000. */
215 extern struct sgimc_dma_ctrl *dmactrlregs;
217 /* Base location of the two ram banks found in IP2[0268] machines. */
218 #define SGIMC_SEG0_BADDR 0x08000000
219 #define SGIMC_SEG1_BADDR 0x20000000
221 /* Maximum size of the above banks are per machine. */
222 extern u32 sgimc_seg0_size, sgimc_seg1_size;
223 #define SGIMC_SEG0_SIZE_ALL 0x10000000 /* 256MB */
224 #define SGIMC_SEG1_SIZE_IP20_IP22 0x08000000 /* 128MB */
225 #define SGIMC_SEG1_SIZE_IP26_IP28 0x20000000 /* 512MB */
227 extern void sgimc_init(void);
229 #endif /* _ASM_SGI_SGIMC_H */