2 * arch/ppc/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 * Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
8 * Further modified for generic 8xx and 8260 by Dan.
12 * bootup setup stuff..
15 #include <linux/config.h>
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/a.out.h>
26 #include <linux/tty.h>
27 #include <linux/major.h>
28 #include <linux/interrupt.h>
29 #include <linux/reboot.h>
30 #include <linux/init.h>
31 #include <linux/initrd.h>
32 #include <linux/ioport.h>
33 #include <linux/ide.h>
34 #include <linux/seq_file.h>
37 #include <asm/residual.h>
39 #include <asm/pgtable.h>
41 #include <asm/mpc8260.h>
42 #include <asm/immap_cpm2.h>
43 #include <asm/machdep.h>
44 #include <asm/bootinfo.h>
49 static int m8260_set_rtc_time(unsigned long time);
50 static unsigned long m8260_get_rtc_time(void);
51 static void m8260_calibrate_decr(void);
53 unsigned char __res[sizeof(bd_t)];
55 extern void cpm2_reset(void);
56 extern void m8260_find_bridges(void);
57 extern void idma_pci9_init(void);
60 m8260_setup_arch(void)
62 /* Reset the Communication Processor Module.
65 #ifdef CONFIG_8260_PCI9
66 /* Initialise IDMA for PCI erratum workaround */
69 #ifdef CONFIG_PCI_8260
74 /* The decrementer counts at the system (internal) clock frequency
78 m8260_calibrate_decr(void)
80 bd_t *binfo = (bd_t *)__res;
83 freq = binfo->bi_busfreq;
85 tb_ticks_per_jiffy = freq / HZ / divisor;
86 tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
89 /* The 8260 has an internal 1-second timer update register that
90 * we should use for this purpose.
95 m8260_set_rtc_time(unsigned long time)
103 m8260_get_rtc_time(void)
105 /* Get time from the RTC.
107 return((unsigned long)rtc_time);
110 #ifndef BOOTROM_RESTART_ADDR
111 #warning "Using default BOOTROM_RESTART_ADDR!"
112 #define BOOTROM_RESTART_ADDR 0xff000104
116 m8260_restart(char *cmd)
118 extern void m8260_gorom(bd_t *bi, uint addr);
121 /* Most boot roms have a warmstart as the second instruction
122 * of the reset vector. If that doesn't work for you, change this
123 * or the reboot program to send a proper address.
125 startaddr = BOOTROM_RESTART_ADDR;
127 if (!strncmp(cmd, "startaddr=", 10))
128 startaddr = simple_strtoul(&cmd[10], NULL, 0);
131 m8260_gorom((void*)__pa(__res), startaddr);
142 m8260_power_off(void)
148 m8260_show_percpuinfo(struct seq_file *m, int i)
154 seq_printf(m, "core clock\t: %ld MHz\n"
155 "CPM clock\t: %ld MHz\n"
156 "bus clock\t: %ld MHz\n",
157 bp->bi_intfreq / 1000000,
158 bp->bi_cpmfreq / 1000000,
159 bp->bi_busfreq / 1000000);
163 /* Initialize the internal interrupt controller. The number of
164 * interrupts supported can vary with the processor type, and the
165 * 8260 family can have up to 64.
166 * External interrupts can be either edge or level triggered, and
167 * need to be initialized by the appropriate driver.
173 void cpm_interrupt_init(void);
175 for ( i = 0 ; i < NR_SIU_INTS ; i++ )
176 irq_desc[i].handler = &cpm2_pic;
178 /* Initialize the default interrupt mapping priorities,
179 * in case the boot rom changed something on us.
181 cpm2_immr->im_intctl.ic_sicr = 0;
182 cpm2_immr->im_intctl.ic_siprr = 0x05309770;
183 cpm2_immr->im_intctl.ic_scprrh = 0x05309770;
184 cpm2_immr->im_intctl.ic_scprrl = 0x05309770;
190 static unsigned long __init
191 m8260_find_end_of_memory(void)
194 extern unsigned char __res[];
196 binfo = (bd_t *)__res;
198 return binfo->bi_memsize;
201 /* Map the IMMR, plus anything else we can cover
202 * in that upper space according to the memory controller
203 * chip select mapping. Grab another bunch of space
204 * below that for stuff we can't cover in the upper.
211 /* Map IMMR region to a 256MB BAT */
212 addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR;
213 io_block_mapping(addr, addr, 0x10000000, _PAGE_IO);
215 /* Map I/O region to a 256MB BAT */
216 io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO);
220 * r3 - Optional pointer to a board information structure.
221 * r4 - Optional pointer to the physical starting address of the init RAM
223 * r5 - Optional pointer to the physical ending address of the init RAM
225 * r6 - Optional pointer to the physical starting address of any kernel
226 * command-line parameters.
227 * r7 - Optional pointer to the physical ending address of any kernel
228 * command-line parameters.
231 m8260_init(unsigned long r3, unsigned long r4, unsigned long r5,
232 unsigned long r6, unsigned long r7)
234 parse_bootinfo(find_bootinfo());
237 memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );
239 #ifdef CONFIG_BLK_DEV_INITRD
240 /* take care of initrd if we have one */
242 initrd_start = r4 + KERNELBASE;
243 initrd_end = r5 + KERNELBASE;
245 #endif /* CONFIG_BLK_DEV_INITRD */
246 /* take care of cmd line */
248 *(char *)(r7+KERNELBASE) = 0;
249 strcpy(cmd_line, (char *)(r6+KERNELBASE));
252 ppc_md.setup_arch = m8260_setup_arch;
253 ppc_md.show_percpuinfo = m8260_show_percpuinfo;
254 ppc_md.irq_canonicalize = NULL;
255 ppc_md.init_IRQ = m8260_init_IRQ;
256 ppc_md.get_irq = cpm2_get_irq;
259 ppc_md.restart = m8260_restart;
260 ppc_md.power_off = m8260_power_off;
261 ppc_md.halt = m8260_halt;
263 ppc_md.time_init = NULL;
264 ppc_md.set_rtc_time = m8260_set_rtc_time;
265 ppc_md.get_rtc_time = m8260_get_rtc_time;
266 ppc_md.calibrate_decr = m8260_calibrate_decr;
268 ppc_md.find_end_of_memory = m8260_find_end_of_memory;
269 ppc_md.setup_io_mappings = m8260_map_io;