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 * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
7 */
8
9 #include <linux/types.h>
10 #include <linux/config.h>
11 #include <linux/slab.h>
12 #include <asm/sn/sgi.h>
13 #include <asm/sn/io.h>
14 #include <asm/sn/sn_cpuid.h>
15 #include <asm/sn/klconfig.h>
16 #include <asm/sn/sn_private.h>
17 #include <asm/sn/pda.h>
18 #include <linux/smp.h>
19
20 extern int init_hcl(void);
21
22 /*
23 * per_hub_init
24 *
25 * This code is executed once for each Hub chip.
26 */
27 void
per_hub_init(cnodeid_t cnode)28 per_hub_init(cnodeid_t cnode)
29 {
30 nasid_t nasid;
31 nodepda_t *npdap;
32 ii_icmr_u_t ii_icmr;
33 ii_ibcr_u_t ii_ibcr;
34 ii_ilcsr_u_t ii_ilcsr;
35
36 nasid = COMPACT_TO_NASID_NODEID(cnode);
37
38 ASSERT(nasid != INVALID_NASID);
39 ASSERT(NASID_TO_COMPACT_NODEID(nasid) == cnode);
40
41 npdap = NODEPDA(cnode);
42
43 /* Disable the request and reply errors. */
44 REMOTE_HUB_S(nasid, IIO_IWEIM, 0xC000);
45
46 /*
47 * Set the total number of CRBs that can be used.
48 */
49 ii_icmr.ii_icmr_regval= 0x0;
50 ii_icmr.ii_icmr_fld_s.i_c_cnt = 0xf;
51 if (enable_shub_wars_1_1() ) {
52 // Set bit one of ICMR to prevent II from sending interrupt for II bug.
53 ii_icmr.ii_icmr_regval |= 0x1;
54 }
55 REMOTE_HUB_S(nasid, IIO_ICMR, ii_icmr.ii_icmr_regval);
56
57 /*
58 * Set the number of CRBs that both of the BTEs combined
59 * can use minus 1.
60 */
61 ii_ibcr.ii_ibcr_regval= 0x0;
62 ii_ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(nasid, IIO_LLP_CSR);
63 if (ii_ilcsr.ii_ilcsr_fld_s.i_llp_stat & LNK_STAT_WORKING) {
64 ii_ibcr.ii_ibcr_fld_s.i_count = 0x8;
65 } else {
66 /*
67 * if the LLP is down, there is no attached I/O, so
68 * give BTE all the CRBs.
69 */
70 ii_ibcr.ii_ibcr_fld_s.i_count = 0x14;
71 }
72 REMOTE_HUB_S(nasid, IIO_IBCR, ii_ibcr.ii_ibcr_regval);
73
74 /*
75 * Set CRB timeout to be 10ms.
76 */
77 REMOTE_HUB_S(nasid, IIO_ICTP, 0xffffff );
78 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
79
80 /* Initialize error interrupts for this hub. */
81 hub_error_init(cnode);
82 }
83
84 /*
85 * This routine is responsible for the setup of all the IRIX hwgraph style
86 * stuff that's been pulled into linux. It's called by sn_pci_find_bios which
87 * is called just before the generic Linux PCI layer does its probing (by
88 * platform_pci_fixup aka sn_pci_fixup).
89 *
90 * It is very IMPORTANT that this call is only made by the Master CPU!
91 *
92 */
93
94 void
sgi_master_io_infr_init(void)95 sgi_master_io_infr_init(void)
96 {
97 extern void irix_io_init(void);
98
99 init_hcl(); /* Sets up the hwgraph compatibility layer with devfs */
100 irix_io_init(); /* Do IRIX Compatibility IO Init */
101
102 #ifdef CONFIG_KDB
103 {
104 extern void kdba_io_init(void);
105 kdba_io_init();
106 }
107 #endif
108
109 }
110