ip22-hpc.c
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上传日期:2013-04-10
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- /*
- * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- * Copyright (C) 1998 Ralf Baechle
- */
- #include <linux/init.h>
- #include <linux/types.h>
- #include <asm/addrspace.h>
- #include <asm/sgi/sgihpc.h>
- #include <asm/sgi/sgint23.h>
- #include <asm/sgialib.h>
- #include <asm/bootinfo.h>
- #if 0
- #define HPC_DEBUG(args...) printk(args)
- #else
- #define HPC_DEBUG(args...)
- #endif
- struct hpc3_regs *hpc3c0, *hpc3c1;
- struct hpc3_miscregs *hpc3mregs;
- /* We need software copies of these because they are write only. */
- u32 sgi_hpc_write1, sgi_hpc_write2;
- /* Machine specific identifier knobs. */
- int sgi_has_ioc2 = 0;
- int sgi_guiness = 0;
- int sgi_boardid;
- extern char *system_type;
- void __init sgihpc_init(void)
- {
- unsigned int sid, crev, brev;
- hpc3c0 = (struct hpc3_regs *) (KSEG1 + HPC3_CHIP0_PBASE);
- hpc3c1 = (struct hpc3_regs *) (KSEG1 + HPC3_CHIP1_PBASE);
- hpc3mregs = (struct hpc3_miscregs *) (KSEG1 + HPC3_MREGS_PBASE);
- sid = hpc3mregs->sysid;
- sid &= 0xff;
- crev = (sid & 0xe0) >> 5;
- brev = (sid & 0x1e) >> 1;
- HPC_DEBUG("sgihpc_init: crev<%2x> brev<%2x>n", crev, brev);
- HPC_DEBUG("sgihpc_init: ");
- /* This test works now thanks to William J. Earl */
- if ((sid & 1) == 0 ) {
- HPC_DEBUG("GUINESS ");
- sgi_guiness = 1;
- mips_machtype = MACH_SGI_INDY;
- system_type = "SGI Indy";
- } else {
- HPC_DEBUG("FULLHOUSE ");
- mips_machtype = MACH_SGI_INDIGO2;
- sgi_guiness = 0;
- system_type = "SGI Indigo2";
- }
- sgi_boardid = brev;
- HPC_DEBUG("sgi_boardid<%d> ", sgi_boardid);
- if(crev == 1) {
- if((sid & 1) || (brev >= 2)) {
- HPC_DEBUG("IOC2 ");
- sgi_has_ioc2 = 1;
- } else {
- HPC_DEBUG("IOC1 revision 1 ");
- }
- } else {
- HPC_DEBUG("IOC1 revision 0 ");
- }
- HPC_DEBUG("n");
- sgi_hpc_write1 = (HPC3_WRITE1_PRESET | HPC3_WRITE1_KMRESET |
- HPC3_WRITE1_ERESET | HPC3_WRITE1_LC0OFF);
- sgi_hpc_write2 = (HPC3_WRITE2_EASEL | HPC3_WRITE2_NTHRESH |
- HPC3_WRITE2_TPSPEED | HPC3_WRITE2_EPSEL |
- HPC3_WRITE2_U0AMODE | HPC3_WRITE2_U1AMODE);
- if(!sgi_guiness)
- sgi_hpc_write1 |= HPC3_WRITE1_GRESET;
- hpc3mregs->write1 = sgi_hpc_write1;
- hpc3mregs->write2 = sgi_hpc_write2;
- hpc3c0->pbus_piocfgs[0][6] |= HPC3_PIOPCFG_HW;
- }