1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * mc.h: Definitions for SGI Memory Controller 7 * 8 * Copyright (C) 1996 David S. Miller 9 * Copyright (C) 1999 Ralf Baechle 10 * Copyright (C) 1999 Silicon Graphics, Inc. 11 */ 12 13#ifndef _SGI_MC_H 14#define _SGI_MC_H 15 16struct sgimc_regs { 17 u32 _unused0; 18 volatile u32 cpuctrl0; /* CPU control register 0, readwrite */ 19#define SGIMC_CCTRL0_REFS 0x0000000f /* REFS mask */ 20#define SGIMC_CCTRL0_EREFRESH 0x00000010 /* Memory refresh enable */ 21#define SGIMC_CCTRL0_EPERRGIO 0x00000020 /* GIO parity error enable */ 22#define SGIMC_CCTRL0_EPERRMEM 0x00000040 /* Main mem parity error enable */ 23#define SGIMC_CCTRL0_EPERRCPU 0x00000080 /* CPU bus parity error enable */ 24#define SGIMC_CCTRL0_WDOG 0x00000100 /* Watchdog timer enable */ 25#define SGIMC_CCTRL0_SYSINIT 0x00000200 /* System init bit */ 26#define SGIMC_CCTRL0_GFXRESET 0x00000400 /* Graphics interface reset */ 27#define SGIMC_CCTRL0_EISALOCK 0x00000800 /* Lock CPU from memory for EISA */ 28#define SGIMC_CCTRL0_EPERRSCMD 0x00001000 /* SysCMD bus parity error enable */ 29#define SGIMC_CCTRL0_IENAB 0x00002000 /* Allow interrupts from MC */ 30#define SGIMC_CCTRL0_ESNOOP 0x00004000 /* Snooping I/O enable */ 31#define SGIMC_CCTRL0_EPROMWR 0x00008000 /* Prom writes from cpu enable */ 32#define SGIMC_CCTRL0_WRESETPMEM 0x00010000 /* Perform warm reset, preserves mem */ 33#define SGIMC_CCTRL0_LENDIAN 0x00020000 /* Put MC in little-endian mode */ 34#define SGIMC_CCTRL0_WRESETDMEM 0x00040000 /* Warm reset, destroys mem contents */ 35#define SGIMC_CCTRL0_CMEMBADPAR 0x02000000 /* Generate bad perr from cpu to mem */ 36#define SGIMC_CCTRL0_R4KNOCHKPARR 0x04000000 /* Don't chk parity on mem data reads */ 37#define SGIMC_CCTRL0_GIOBTOB 0x08000000 /* Allow GIO back to back writes */ 38 u32 _unused1; 39 volatile u32 cpuctrl1; /* CPU control register 1, readwrite */ 40#define SGIMC_CCTRL1_EGIOTIMEO 0x00000010 /* GIO bus timeout enable */ 41#define SGIMC_CCTRL1_FIXEDEHPC 0x00001000 /* Fixed HPC endianness */ 42#define SGIMC_CCTRL1_LITTLEHPC 0x00002000 /* Little endian HPC */ 43#define SGIMC_CCTRL1_FIXEDEEXP0 0x00004000 /* Fixed EXP0 endianness */ 44#define SGIMC_CCTRL1_LITTLEEXP0 0x00008000 /* Little endian EXP0 */ 45#define SGIMC_CCTRL1_FIXEDEEXP1 0x00010000 /* Fixed EXP1 endianness */ 46#define SGIMC_CCTRL1_LITTLEEXP1 0x00020000 /* Little endian EXP1 */ 47 48 u32 _unused2; 49 volatile u32 watchdogt; /* Watchdog reg rdonly, write clears */ 50 51 u32 _unused3; 52 volatile u32 systemid; /* MC system ID register, readonly */ 53#define SGIMC_SYSID_MASKREV 0x0000000f /* Revision of MC controller */ 54#define SGIMC_SYSID_EPRESENT 0x00000010 /* Indicates presence of EISA bus */ 55 56 u32 _unused4[3]; 57 volatile u32 divider; /* Divider reg for RPSS */ 58 59 u32 _unused5; 60 u32 eeprom; /* EEPROM byte reg for r4k */ 61#define SGIMC_EEPROM_PRE 0x00000001 /* eeprom chip PRE pin assertion */ 62#define SGIMC_EEPROM_CSEL 0x00000002 /* Active high, eeprom chip select */ 63#define SGIMC_EEPROM_SECLOCK 0x00000004 /* EEPROM serial clock */ 64#define SGIMC_EEPROM_SDATAO 0x00000008 /* Serial EEPROM data-out */ 65#define SGIMC_EEPROM_SDATAI 0x00000010 /* Serial EEPROM data-in */ 66 67 u32 _unused6[3]; 68 volatile u32 rcntpre; /* Preload refresh counter */ 69 70 u32 _unused7; 71 volatile u32 rcounter; /* Readonly refresh counter */ 72 73 u32 _unused8[13]; 74 volatile u32 giopar; /* Parameter word for GIO64 */ 75#define SGIMC_GIOPAR_HPC64 0x00000001 /* HPC talks to GIO using 64-bits */ 76#define SGIMC_GIOPAR_GFX64 0x00000002 /* GFX talks to GIO using 64-bits */ 77#define SGIMC_GIOPAR_EXP064 0x00000004 /* EXP(slot0) talks using 64-bits */ 78#define SGIMC_GIOPAR_EXP164 0x00000008 /* EXP(slot1) talks using 64-bits */ 79#define SGIMC_GIOPAR_EISA64 0x00000010 /* EISA bus talks 64-bits to GIO */ 80#define SGIMC_GIOPAR_HPC264 0x00000020 /* 2nd HPX talks 64-bits to GIO */ 81#define SGIMC_GIOPAR_RTIMEGFX 0x00000040 /* GFX device has realtime attr */ 82#define SGIMC_GIOPAR_RTIMEEXP0 0x00000080 /* EXP(slot0) has realtime attr */ 83#define SGIMC_GIOPAR_RTIMEEXP1 0x00000100 /* EXP(slot1) has realtime attr */ 84#define SGIMC_GIOPAR_MASTEREISA 0x00000200 /* EISA bus can act as bus master */ 85#define SGIMC_GIOPAR_ONEBUS 0x00000400 /* Exists one GIO64 pipelined bus */ 86#define SGIMC_GIOPAR_MASTERGFX 0x00000800 /* GFX can act as a bus master */ 87#define SGIMC_GIOPAR_MASTEREXP0 0x00001000 /* EXP(slot0) can bus master */ 88#define SGIMC_GIOPAR_MASTEREXP1 0x00002000 /* EXP(slot1) can bus master */ 89#define SGIMC_GIOPAR_PLINEEXP0 0x00004000 /* EXP(slot0) has pipeline attr */ 90#define SGIMC_GIOPAR_PLINEEXP1 0x00008000 /* EXP(slot1) has pipeline attr */ 91 92 u32 _unused9; 93 volatile u32 cputp; /* CPU bus arb time period */ 94 95 u32 _unused10[3]; 96 volatile u32 lbursttp; /* Time period for long bursts */ 97 98 /* MC chip can drive up to 4 bank 4 SIMMs each. All SIMMs in bank must 99 * be the same size. The size encoding for supported SIMMs is bellow */ 100 u32 _unused11[9]; 101 volatile u32 mconfig0; /* Memory config register zero */ 102 u32 _unused12; 103 volatile u32 mconfig1; /* Memory config register one */ 104#define SGIMC_MCONFIG_BASEADDR 0x000000ff /* Base address of bank*/ 105#define SGIMC_MCONFIG_RMASK 0x00001f00 /* Ram config bitmask */ 106#define SGIMC_MCONFIG_BVALID 0x00002000 /* Bank is valid */ 107#define SGIMC_MCONFIG_SBANKS 0x00004000 /* Number of subbanks */ 108 109 u32 _unused13; 110 volatile u32 cmacc; /* Mem access config for CPU */ 111 u32 _unused14; 112 volatile u32 gmacc; /* Mem access config for GIO */ 113 114 /* This define applies to both cmacc and gmacc registers above. */ 115#define SGIMC_MACC_ALIASBIG 0x20000000 /* 512MB home for alias */ 116 117 /* Error address/status regs from GIO and CPU perspectives. */ 118 u32 _unused15; 119 volatile u32 cerr; /* Error address reg for CPU */ 120 u32 _unused16; 121 volatile u32 cstat; /* Status reg for CPU */ 122#define SGIMC_CSTAT_RD 0x00000100 /* read parity error */ 123#define SGIMC_CSTAT_PAR 0x00000200 /* CPU parity error */ 124#define SGIMC_CSTAT_ADDR 0x00000400 /* memory bus error bad addr */ 125#define SGIMC_CSTAT_SYSAD_PAR 0x00000800 /* sysad parity error */ 126#define SGIMC_CSTAT_SYSCMD_PAR 0x00001000 /* syscmd parity error */ 127#define SGIMC_CSTAT_BAD_DATA 0x00002000 /* bad data identifier */ 128#define SGIMC_CSTAT_PAR_MASK 0x00001f00 /* parity error mask */ 129#define SGIMC_CSTAT_RD_PAR (SGIMC_CSTAT_RD | SGIMC_CSTAT_PAR) 130 131 u32 _unused17; 132 volatile u32 gerr; /* Error address reg for GIO */ 133 u32 _unused18; 134 volatile u32 gstat; /* Status reg for GIO */ 135#define SGIMC_GSTAT_RD 0x00000100 /* read parity error */ 136#define SGIMC_GSTAT_WR 0x00000200 /* write parity error */ 137#define SGIMC_GSTAT_TIME 0x00000400 /* GIO bus timed out */ 138#define SGIMC_GSTAT_PROM 0x00000800 /* write to PROM when PROM_EN not set */ 139#define SGIMC_GSTAT_ADDR 0x00001000 /* parity error on addr cycle */ 140#define SGIMC_GSTAT_BC 0x00002000 /* parity error on byte count cycle */ 141#define SGIMC_GSTAT_PIO_RD 0x00004000 /* read data parity on pio */ 142#define SGIMC_GSTAT_PIO_WR 0x00008000 /* write data parity on pio */ 143 144 /* Special hard bus locking registers. */ 145 u32 _unused19; 146 volatile u32 syssembit; /* Uni-bit system semaphore */ 147 u32 _unused20; 148 volatile u32 mlock; /* Global GIO memory access lock */ 149 u32 _unused21; 150 volatile u32 elock; /* Locks EISA from GIO accesses */ 151 152 /* GIO dma control registers. */ 153 u32 _unused22[15]; 154 volatile u32 gio_dma_trans; /* DMA mask to translation GIO addrs */ 155 u32 _unused23; 156 volatile u32 gio_dma_sbits; /* DMA GIO addr substitution bits */ 157 u32 _unused24; 158 volatile u32 dma_intr_cause; /* DMA IRQ cause indicator bits */ 159 u32 _unused25; 160 volatile u32 dma_ctrl; /* Main DMA control reg */ 161 162 /* DMA TLB entry 0 */ 163 u32 _unused26[5]; 164 volatile u32 dtlb_hi0; 165 u32 _unused27; 166 volatile u32 dtlb_lo0; 167 168 /* DMA TLB entry 1 */ 169 u32 _unused28; 170 volatile u32 dtlb_hi1; 171 u32 _unused29; 172 volatile u32 dtlb_lo1; 173 174 /* DMA TLB entry 2 */ 175 u32 _unused30; 176 volatile u32 dtlb_hi2; 177 u32 _unused31; 178 volatile u32 dtlb_lo2; 179 180 /* DMA TLB entry 3 */ 181 u32 _unused32; 182 volatile u32 dtlb_hi3; 183 u32 _unused33; 184 volatile u32 dtlb_lo3; 185 186 u32 _unused34[0x0392]; 187 188 u32 _unused35; 189 volatile u32 rpsscounter; /* Chirps at 100ns */ 190 191 u32 _unused36[0x1000/4-2*4]; 192 193 u32 _unused37; 194 volatile u32 maddronly; /* Address DMA goes at */ 195 u32 _unused38; 196 volatile u32 maddrpdeflts; /* Same as above, plus set defaults */ 197 u32 _unused39; 198 volatile u32 dmasz; /* DMA count */ 199 u32 _unused40; 200 volatile u32 ssize; /* DMA stride size */ 201 u32 _unused41; 202 volatile u32 gmaddronly; /* Set GIO DMA but don't start trans */ 203 u32 _unused42; 204 volatile u32 dmaddnpgo; /* Set GIO DMA addr + start transfer */ 205 u32 _unused43; 206 volatile u32 dmamode; /* DMA mode config bit settings */ 207 u32 _unused44; 208 volatile u32 dmaccount; /* Zoom and byte count for DMA */ 209 u32 _unused45; 210 volatile u32 dmastart; /* Pedal to the metal. */ 211 u32 _unused46; 212 volatile u32 dmarunning; /* DMA op is in progress */ 213 u32 _unused47; 214 volatile u32 maddrdefstart; /* Set dma addr, defaults, and kick it */ 215}; 216 217extern struct sgimc_regs *sgimc; 218#define SGIMC_BASE 0x1fa00000 /* physical */ 219 220/* Base location of the two ram banks found in IP2[0268] machines. */ 221#define SGIMC_SEG0_BADDR 0x08000000 222#define SGIMC_SEG1_BADDR 0x20000000 223 224/* Maximum size of the above banks are per machine. */ 225#define SGIMC_SEG0_SIZE_ALL 0x10000000 /* 256MB */ 226#define SGIMC_SEG1_SIZE_IP20_IP22 0x08000000 /* 128MB */ 227#define SGIMC_SEG1_SIZE_IP26_IP28 0x20000000 /* 512MB */ 228 229extern void sgimc_init(void); 230 231#endif /* _SGI_MC_H */ 232