1 /* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
2 * linux/arch/sparc64/kernel/setup.c
4 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 #include <linux/errno.h>
9 #include <linux/sched.h>
10 #include <linux/kernel.h>
12 #include <linux/stddef.h>
13 #include <linux/unistd.h>
14 #include <linux/ptrace.h>
15 #include <linux/slab.h>
17 #include <linux/user.h>
18 #include <linux/screen_info.h>
19 #include <linux/delay.h>
21 #include <linux/seq_file.h>
22 #include <linux/syscalls.h>
23 #include <linux/kdev_t.h>
24 #include <linux/major.h>
25 #include <linux/string.h>
26 #include <linux/init.h>
27 #include <linux/inet.h>
28 #include <linux/console.h>
29 #include <linux/root_dev.h>
30 #include <linux/interrupt.h>
31 #include <linux/cpu.h>
32 #include <linux/initrd.h>
34 #include <asm/system.h>
36 #include <asm/processor.h>
37 #include <asm/oplib.h>
39 #include <asm/pgtable.h>
40 #include <asm/idprom.h>
42 #include <asm/starfire.h>
43 #include <asm/mmu_context.h>
44 #include <asm/timer.h>
45 #include <asm/sections.h>
46 #include <asm/setup.h>
48 #include <asm/ns87303.h>
51 #include <net/ipconfig.h>
54 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
55 * operations in asm/ns87303.h
57 DEFINE_SPINLOCK(ns87303_lock);
59 struct screen_info screen_info = {
60 0, 0, /* orig-x, orig-y */
62 0, /* orig-video-page */
63 0, /* orig-video-mode */
64 128, /* orig-video-cols */
65 0, 0, 0, /* unused, ega_bx, unused */
66 54, /* orig-video-lines */
67 0, /* orig-video-isVGA */
68 16 /* orig-video-points */
71 void (*prom_palette)(int);
72 void (*prom_keyboard)(void);
75 prom_console_write(struct console *con, const char *s, unsigned n)
80 /* Exported for mm/init.c:paging_init. */
81 unsigned long cmdline_memory_size = 0;
83 static struct console prom_early_console = {
85 .write = prom_console_write,
86 .flags = CON_PRINTBUFFER | CON_BOOT,
91 * Process kernel command line switches that are specific to the
92 * SPARC or that require special low-level processing.
94 static void __init process_switch(char c)
101 prom_printf("boot_flags_init: Halt!\n");
105 /* Just ignore, this behavior is now the default. */
108 /* Force UltraSPARC-III P-Cache on. */
109 if (tlb_type != cheetah) {
110 printk("BOOT: Ignoring P-Cache force option.\n");
113 cheetah_pcache_forced_on = 1;
114 add_taint(TAINT_MACHINE_CHECK);
115 cheetah_enable_pcache();
119 printk("Unknown boot switch (-%c)\n", c);
124 static void __init boot_flags_init(char *commands)
127 /* Move to the start of the next "argument". */
128 while (*commands && *commands == ' ')
131 /* Process any command switches, otherwise skip it. */
132 if (*commands == '\0')
134 if (*commands == '-') {
136 while (*commands && *commands != ' ')
137 process_switch(*commands++);
140 if (!strncmp(commands, "mem=", 4)) {
142 * "mem=XXX[kKmM]" overrides the PROM-reported
145 cmdline_memory_size = simple_strtoul(commands + 4,
147 if (*commands == 'K' || *commands == 'k') {
148 cmdline_memory_size <<= 10;
150 } else if (*commands=='M' || *commands=='m') {
151 cmdline_memory_size <<= 20;
155 while (*commands && *commands != ' ')
160 extern unsigned short root_flags;
161 extern unsigned short root_dev;
162 extern unsigned short ram_flags;
163 #define RAMDISK_IMAGE_START_MASK 0x07FF
164 #define RAMDISK_PROMPT_FLAG 0x8000
165 #define RAMDISK_LOAD_FLAG 0x4000
167 extern int root_mountflags;
169 char reboot_command[COMMAND_LINE_SIZE];
171 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
173 void __init per_cpu_patch(void)
175 struct cpuid_patch_entry *p;
179 if (tlb_type == spitfire && !this_is_starfire)
183 if (tlb_type != hypervisor) {
184 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
185 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
186 (ver >> 32UL) == __SERRANO_ID);
190 while (p < &__cpuid_patch_end) {
191 unsigned long addr = p->addr;
196 insns = &p->starfire[0];
201 insns = &p->cheetah_jbus[0];
203 insns = &p->cheetah_safari[0];
206 insns = &p->sun4v[0];
209 prom_printf("Unknown cpu type, halting.\n");
213 *(unsigned int *) (addr + 0) = insns[0];
215 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
217 *(unsigned int *) (addr + 4) = insns[1];
219 __asm__ __volatile__("flush %0" : : "r" (addr + 4));
221 *(unsigned int *) (addr + 8) = insns[2];
223 __asm__ __volatile__("flush %0" : : "r" (addr + 8));
225 *(unsigned int *) (addr + 12) = insns[3];
227 __asm__ __volatile__("flush %0" : : "r" (addr + 12));
233 void __init sun4v_patch(void)
235 extern void sun4v_hvapi_init(void);
236 struct sun4v_1insn_patch_entry *p1;
237 struct sun4v_2insn_patch_entry *p2;
239 if (tlb_type != hypervisor)
242 p1 = &__sun4v_1insn_patch;
243 while (p1 < &__sun4v_1insn_patch_end) {
244 unsigned long addr = p1->addr;
246 *(unsigned int *) (addr + 0) = p1->insn;
248 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
253 p2 = &__sun4v_2insn_patch;
254 while (p2 < &__sun4v_2insn_patch_end) {
255 unsigned long addr = p2->addr;
257 *(unsigned int *) (addr + 0) = p2->insns[0];
259 __asm__ __volatile__("flush %0" : : "r" (addr + 0));
261 *(unsigned int *) (addr + 4) = p2->insns[1];
263 __asm__ __volatile__("flush %0" : : "r" (addr + 4));
272 void __init boot_cpu_id_too_large(int cpu)
274 prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
280 void __init setup_arch(char **cmdline_p)
282 /* Initialize PROM console and command line. */
283 *cmdline_p = prom_getbootargs();
284 strcpy(boot_command_line, *cmdline_p);
286 boot_flags_init(*cmdline_p);
287 register_console(&prom_early_console);
289 if (tlb_type == hypervisor)
290 printk("ARCH: SUN4V\n");
292 printk("ARCH: SUN4U\n");
294 #ifdef CONFIG_DUMMY_CONSOLE
295 conswitchp = &dummy_con;
296 #elif defined(CONFIG_PROM_CONSOLE)
297 conswitchp = &prom_con;
303 root_mountflags &= ~MS_RDONLY;
304 ROOT_DEV = old_decode_dev(root_dev);
305 #ifdef CONFIG_BLK_DEV_RAM
306 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
307 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
308 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
311 task_thread_info(&init_task)->kregs = &fake_swapper_regs;
314 if (!ic_set_manually) {
315 int chosen = prom_finddevice ("/chosen");
318 cl = prom_getintdefault (chosen, "client-ip", 0);
319 sv = prom_getintdefault (chosen, "server-ip", 0);
320 gw = prom_getintdefault (chosen, "gateway-ip", 0);
326 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
327 ic_proto_enabled = 0;
333 /* Get boot processor trap_block[] setup. */
334 init_cur_cpu_trap(current_thread_info());
339 /* BUFFER is PAGE_SIZE bytes long. */
341 extern char *sparc_cpu_type;
342 extern char *sparc_fpu_type;
344 extern void smp_info(struct seq_file *);
345 extern void smp_bogo(struct seq_file *);
346 extern void mmu_info(struct seq_file *);
348 unsigned int dcache_parity_tl1_occurred;
349 unsigned int icache_parity_tl1_occurred;
353 static int show_cpuinfo(struct seq_file *m, void *__unused)
360 "ncpus probed\t: %d\n"
361 "ncpus active\t: %d\n"
362 "D$ parity tl1\t: %u\n"
363 "I$ parity tl1\t: %u\n"
365 "Cpu0ClkTck\t: %016lx\n"
371 ((tlb_type == hypervisor) ?
376 dcache_parity_tl1_occurred,
377 icache_parity_tl1_occurred
379 , cpu_data(0).clock_tick
392 static void *c_start(struct seq_file *m, loff_t *pos)
394 /* The pointer we are returning is arbitrary,
395 * it just has to be non-NULL and not IS_ERR
396 * in the success case.
398 return *pos == 0 ? &c_start : NULL;
401 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
404 return c_start(m, pos);
407 static void c_stop(struct seq_file *m, void *v)
411 const struct seq_operations cpuinfo_op = {
415 .show = show_cpuinfo,
418 extern int stop_a_enabled;
420 void sun_do_break(void)
426 flush_user_windows();
431 int stop_a_enabled = 1;