2 * Copyright (c) 2004 Juli Mallett. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/module.h>
31 #include <sys/stdint.h>
35 #include <sys/sysctl.h>
36 #include <sys/systm.h>
39 #include <vm/vm_page.h>
41 #include <machine/cache.h>
42 #include <machine/cpufunc.h>
43 #include <machine/cpuinfo.h>
44 #include <machine/cpuregs.h>
45 #include <machine/intr_machdep.h>
46 #include <machine/locore.h>
47 #include <machine/pte.h>
49 static struct mips_cpuinfo cpuinfo;
55 * Attempt to identify the MIPS CPU as much as possible.
57 * XXX: Assumes the CPU is MIPS32 compliant.
58 * XXX: For now, skip config register selections 2 and 3
59 * as we don't currently use L2/L3 cache or additional
60 * MIPS32 processor features.
63 mips_get_identity(struct mips_cpuinfo *cpuinfo)
70 memset(cpuinfo, 0, sizeof(struct mips_cpuinfo));
72 /* Read and store the PrID ID for CPU identification. */
73 prid = mips_rd_prid();
74 cpuinfo->cpu_vendor = MIPS_PRID_CID(prid);
75 cpuinfo->cpu_rev = MIPS_PRID_REV(prid);
76 cpuinfo->cpu_impl = MIPS_PRID_IMPL(prid);
78 /* Read config register selection 0 to learn TLB type. */
79 cfg0 = mips_rd_config();
81 cpuinfo->tlb_type = ((cfg0 & MIPS_CONFIG0_MT_MASK) >> MIPS_CONFIG0_MT_SHIFT);
82 cpuinfo->icache_virtual = cfg0 & MIPS_CONFIG0_VI;
84 /* If config register selection 1 does not exist, exit. */
85 if (!(cfg0 & MIPS3_CONFIG_CM))
88 /* Learn TLB size and L1 cache geometry. */
89 cfg1 = mips_rd_config_sel1();
90 cpuinfo->tlb_nentries = ((cfg1 & MIPS_CONFIG1_TLBSZ_MASK) >> MIPS_CONFIG1_TLBSZ_SHIFT) + 1;
92 /* L1 instruction cache. */
93 tmp = 1 << (((cfg1 & MIPS_CONFIG1_IL_MASK) >> MIPS_CONFIG1_IL_SHIFT) + 1);
95 cpuinfo->l1.ic_linesize = tmp;
96 cpuinfo->l1.ic_nways = (((cfg1 & MIPS_CONFIG1_IA_MASK) >> MIPS_CONFIG1_IA_SHIFT)) + 1;
97 cpuinfo->l1.ic_nsets = 1 << (((cfg1 & MIPS_CONFIG1_IS_MASK) >> MIPS_CONFIG1_IS_SHIFT) + 6);
98 cpuinfo->l1.ic_size = cpuinfo->l1.ic_linesize * cpuinfo->l1.ic_nsets
99 * cpuinfo->l1.ic_nways;
103 tmp = 1 << (((cfg1 & MIPS_CONFIG1_DL_MASK) >> MIPS_CONFIG1_DL_SHIFT) + 1);
105 cpuinfo->l1.dc_linesize = tmp;
106 cpuinfo->l1.dc_nways = (((cfg1 & MIPS_CONFIG1_DA_MASK) >> MIPS_CONFIG1_DA_SHIFT)) + 1;
107 cpuinfo->l1.dc_nsets = 1 << (((cfg1 & MIPS_CONFIG1_DS_MASK) >> MIPS_CONFIG1_DS_SHIFT) + 6);
110 * Octeon does 128 byte line-size. But Config-Sel1 doesn't show
111 * 128 line-size, 1 Set, 64 ways.
113 cpuinfo->l1.dc_linesize = 128;
114 cpuinfo->l1.dc_nsets = 1;
115 cpuinfo->l1.dc_nways = 64;
117 cpuinfo->l1.dc_size = cpuinfo->l1.dc_linesize * cpuinfo->l1.dc_nsets
118 * cpuinfo->l1.dc_nways;
125 mips_get_identity(&cpuinfo);
126 num_tlbentries = cpuinfo.tlb_nentries;
128 Mips_TLBFlush(num_tlbentries);
129 Mips_SetWIRED(VMWIRED_ENTRIES);
130 mips_config_cache(&cpuinfo);
133 mips_icache_sync_all();
134 mips_dcache_wbinv_all();
140 printf("cpu%d: ", 0); /* XXX per-cpu */
141 switch (cpuinfo.cpu_vendor) {
142 case MIPS_PRID_CID_MTI:
143 printf("MIPS Technologies");
145 case MIPS_PRID_CID_BROADCOM:
146 case MIPS_PRID_CID_SIBYTE:
149 case MIPS_PRID_CID_ALCHEMY:
152 case MIPS_PRID_CID_SANDCRAFT:
155 case MIPS_PRID_CID_PHILIPS:
158 case MIPS_PRID_CID_TOSHIBA:
161 case MIPS_PRID_CID_LSI:
164 case MIPS_PRID_CID_LEXRA:
167 case MIPS_PRID_CID_PREHISTORIC:
172 printf(" processor v%d.%d\n", cpuinfo.cpu_rev, cpuinfo.cpu_impl);
175 if (cpuinfo.tlb_type == MIPS_MMU_NONE) {
176 printf("none present\n");
178 if (cpuinfo.tlb_type == MIPS_MMU_TLB) {
179 printf("Standard TLB");
180 } else if (cpuinfo.tlb_type == MIPS_MMU_BAT) {
181 printf("Standard BAT");
182 } else if (cpuinfo.tlb_type == MIPS_MMU_FIXED) {
183 printf("Fixed mapping");
185 printf(", %d entries\n", cpuinfo.tlb_nentries);
188 printf(" L1 i-cache: ");
189 if (cpuinfo.l1.ic_linesize == 0) {
192 if (cpuinfo.l1.ic_nways == 1) {
193 printf("direct-mapped with");
195 printf ("%d ways of", cpuinfo.l1.ic_nways);
197 printf(" %d sets, %d bytes per line\n", cpuinfo.l1.ic_nsets, cpuinfo.l1.ic_linesize);
200 printf(" L1 d-cache: ");
201 if (cpuinfo.l1.dc_linesize == 0) {
204 if (cpuinfo.l1.dc_nways == 1) {
205 printf("direct-mapped with");
207 printf ("%d ways of", cpuinfo.l1.dc_nways);
209 printf(" %d sets, %d bytes per line\n", cpuinfo.l1.dc_nsets, cpuinfo.l1.dc_linesize);
213 static struct rman cpu_hardirq_rman;
215 static devclass_t cpu_devclass;
220 static int cpu_probe(device_t);
221 static int cpu_attach(device_t);
222 static struct resource *cpu_alloc_resource(device_t, device_t, int, int *,
223 u_long, u_long, u_long, u_int);
224 static int cpu_setup_intr(device_t, device_t, struct resource *, int,
225 driver_filter_t *f, driver_intr_t *, void *,
228 static device_method_t cpu_methods[] = {
229 /* Device interface */
230 DEVMETHOD(device_probe, cpu_probe),
231 DEVMETHOD(device_attach, cpu_attach),
232 DEVMETHOD(device_detach, bus_generic_detach),
233 DEVMETHOD(device_shutdown, bus_generic_shutdown),
236 DEVMETHOD(bus_alloc_resource, cpu_alloc_resource),
237 DEVMETHOD(bus_setup_intr, cpu_setup_intr),
238 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
243 static driver_t cpu_driver = {
244 "cpu", cpu_methods, 1
248 cpu_probe(device_t dev)
254 cpu_attach(device_t dev)
261 cpu_hardirq_rman.rm_start = 0;
262 cpu_hardirq_rman.rm_end = 5;
263 cpu_hardirq_rman.rm_type = RMAN_ARRAY;
264 cpu_hardirq_rman.rm_descr = "CPU Hard Interrupts";
266 error = rman_init(&cpu_hardirq_rman);
268 device_printf(dev, "failed to initialize irq resources\n");
271 /* XXX rman_manage_all. */
272 error = rman_manage_region(&cpu_hardirq_rman,
273 cpu_hardirq_rman.rm_start,
274 cpu_hardirq_rman.rm_end);
276 device_printf(dev, "failed to manage irq resources\n");
280 if (device_get_unit(dev) != 0)
281 panic("can't attach more cpus");
282 device_set_desc(dev, "MIPS32 processor");
285 clock = device_add_child(dev, "clock", device_get_unit(dev));
287 device_printf(dev, "clock failed to attach");
290 return (bus_generic_attach(dev));
293 static struct resource *
294 cpu_alloc_resource(device_t dev, device_t child, int type, int *rid,
295 u_long start, u_long end, u_long count, u_int flags)
297 struct resource *res;
299 if (type != SYS_RES_IRQ)
301 res = rman_reserve_resource(&cpu_hardirq_rman, start, end, count, 0,
307 cpu_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
308 driver_filter_t *filt, driver_intr_t *handler, void *arg,
314 error = rman_activate_resource(res);
316 device_printf(child, "could not activate irq\n");
320 intr = rman_get_start(res);
322 cpu_establish_hardintr(device_get_nameunit(child), filt, handler, arg,
323 intr, flags, cookiep);
324 device_printf(child, "established CPU interrupt %d\n", intr);
328 DRIVER_MODULE(cpu, root, cpu_driver, cpu_devclass, 0, 0);