| /* |
| * linux/arch/ppc/kernel/setup.c |
| * |
| * Copyright (C) 1995 Linus Torvalds |
| * Adapted from 'alpha' version by Gary Thomas |
| * Modified by Cort Dougan (cort@cs.nmt.edu) |
| * Modified by PPC64 Team, IBM Corp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| /* |
| * bootup setup stuff.. |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/stddef.h> |
| #include <linux/unistd.h> |
| #include <linux/ptrace.h> |
| #include <linux/slab.h> |
| #include <linux/user.h> |
| #include <linux/a.out.h> |
| #include <linux/tty.h> |
| #include <linux/major.h> |
| #include <linux/interrupt.h> |
| #include <linux/reboot.h> |
| #include <linux/init.h> |
| #include <linux/blk.h> |
| #include <linux/ioport.h> |
| #include <linux/console.h> |
| #include <linux/pci.h> |
| #include <linux/version.h> |
| #include <linux/adb.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| |
| #include <linux/irq.h> |
| #include <linux/seq_file.h> |
| |
| #include <asm/mmu.h> |
| #include <asm/processor.h> |
| #include <asm/io.h> |
| #include <asm/pgtable.h> |
| #include <asm/prom.h> |
| #include <asm/rtas.h> |
| #include <asm/pci-bridge.h> |
| #include <asm/pci_dma.h> |
| #include <asm/dma.h> |
| #include <asm/machdep.h> |
| #include <asm/irq.h> |
| #include <asm/keyboard.h> |
| #include <asm/init.h> |
| #include <asm/naca.h> |
| #include <asm/time.h> |
| |
| #include "local_irq.h" |
| #include "i8259.h" |
| #include "open_pic.h" |
| #include "xics.h" |
| #include <asm/ppcdebug.h> |
| #include <asm/cputable.h> |
| |
| extern volatile unsigned char *chrp_int_ack_special; |
| |
| void chrp_setup_pci_ptrs(void); |
| void chrp_progress(char *, unsigned short); |
| void chrp_request_regions(void); |
| |
| extern int pckbd_setkeycode(unsigned int scancode, unsigned int keycode); |
| extern int pckbd_getkeycode(unsigned int scancode); |
| extern int pckbd_translate(unsigned char scancode, unsigned char *keycode, |
| char raw_mode); |
| extern char pckbd_unexpected_up(unsigned char keycode); |
| extern void pckbd_leds(unsigned char leds); |
| extern void pckbd_init_hw(void); |
| extern unsigned char pckbd_sysrq_xlate[128]; |
| extern void openpic_init_IRQ(void); |
| extern void openpic_init_irq_desc(irq_desc_t *); |
| extern void init_ras_IRQ(void); |
| |
| extern void find_and_init_phbs(void); |
| extern void pSeries_pcibios_fixup(void); |
| extern void iSeries_pcibios_fixup(void); |
| |
| extern void pSeries_get_boot_time(struct rtc_time *rtc_time); |
| extern void pSeries_get_rtc_time(struct rtc_time *rtc_time); |
| extern int pSeries_set_rtc_time(struct rtc_time *rtc_time); |
| void pSeries_calibrate_decr(void); |
| static void machine_check_init(void); |
| extern void SystemReset_FWNMI(void), MachineCheck_FWNMI(void); /* from head.S */ |
| int fwnmi_active = 0; /* TRUE if an FWNMI handler is present */ |
| int check_exception_flag = 0; /* TRUE if a check-exception handler present */ |
| |
| kdev_t boot_dev; |
| unsigned long virtPython0Facilities = 0; // python0 facility area (memory mapped io) (64-bit format) VIRTUAL address. |
| |
| extern HPTE *Hash, *Hash_end; |
| extern unsigned long Hash_size, Hash_mask; |
| extern int probingmem; |
| extern unsigned long loops_per_jiffy; |
| |
| extern unsigned long ppc_proc_freq; |
| extern unsigned long ppc_tb_freq; |
| #ifdef CONFIG_BLK_DEV_RAM |
| extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ |
| extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ |
| extern int rd_image_start; /* starting block # of image */ |
| #endif |
| |
| void |
| chrp_get_cpuinfo(struct seq_file *m) |
| { |
| struct device_node *root; |
| const char *model = ""; |
| |
| seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); |
| |
| root = find_path_device("/"); |
| if (root) |
| model = get_property(root, "model", NULL); |
| seq_printf(m, "machine\t\t: CHRP %s\n", model); |
| } |
| |
| void __init chrp_request_regions(void) { |
| request_region(0x20,0x20,"pic1"); |
| request_region(0xa0,0x20,"pic2"); |
| request_region(0x00,0x20,"dma1"); |
| request_region(0x40,0x20,"timer"); |
| request_region(0x80,0x10,"dma page reg"); |
| request_region(0xc0,0x20,"dma2"); |
| } |
| |
| void __init |
| chrp_setup_arch(void) |
| { |
| struct device_node *root; |
| unsigned int *opprop; |
| |
| /* openpic global configuration register (64-bit format). */ |
| /* openpic Interrupt Source Unit pointer (64-bit format). */ |
| /* python0 facility area (mmio) (64-bit format) REAL address. */ |
| |
| /* init to some ~sane value until calibrate_delay() runs */ |
| loops_per_jiffy = 50000000; |
| |
| #ifdef CONFIG_BLK_DEV_INITRD |
| /* this is fine for chrp */ |
| initrd_below_start_ok = 1; |
| |
| if (initrd_start) |
| ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0); |
| else |
| #endif |
| ROOT_DEV = to_kdev_t(0x0803); /* sda3 (sda1 is for the kernel or the bootloader) */ |
| |
| machine_check_init(); |
| |
| #ifndef CONFIG_PPC_ISERIES |
| /* Find and initialize PCI host bridges */ |
| /* iSeries needs to be done much later. */ |
| eeh_init(); |
| find_and_init_phbs(); |
| #endif |
| |
| /* Find the Open PIC if present */ |
| root = find_path_device("/"); |
| opprop = (unsigned int *) get_property(root, |
| "platform-open-pic", NULL); |
| if (opprop != 0) { |
| int n = prom_n_addr_cells(root); |
| unsigned long openpic; |
| |
| for (openpic = 0; n > 0; --n) |
| openpic = (openpic << 32) + *opprop++; |
| printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic); |
| OpenPIC_Addr = __ioremap(openpic, 0x40000, _PAGE_NO_CACHE); |
| } |
| |
| #ifdef CONFIG_DUMMY_CONSOLE |
| conswitchp = &dummy_con; |
| #endif |
| } |
| |
| void __init |
| chrp_init2(void) |
| { |
| /* |
| * It is sensitive, when this is called (not too earlu) |
| * -- tibit |
| */ |
| chrp_request_regions(); |
| /* Manually leave the kernel version on the panel. */ |
| ppc_md.progress("Linux ppc64\n", 0); |
| ppc_md.progress(UTS_RELEASE, 0); |
| } |
| |
| /* Initialize firmware assisted non-maskable interrupts if |
| * the firmware supports this feature. If it does not, |
| * look for the check-exception property. |
| */ |
| static void __init machine_check_init(void) |
| { |
| long ret; |
| int check_ex_token; |
| int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
| |
| if (ibm_nmi_register != RTAS_UNKNOWN_SERVICE) { |
| ret = rtas_call(ibm_nmi_register, 2, 1, NULL, |
| __pa((unsigned long)SystemReset_FWNMI), |
| __pa((unsigned long)MachineCheck_FWNMI)); |
| if (ret == 0) |
| fwnmi_active = 1; |
| } else { |
| check_ex_token = rtas_token("check-exception"); |
| if (check_ex_token != RTAS_UNKNOWN_SERVICE) |
| check_exception_flag = 1; |
| } |
| } |
| |
| |
| /* Early initialization. Relocation is on but do not reference unbolted pages */ |
| void __init pSeries_init_early(void) |
| { |
| #ifdef CONFIG_PPC_PSERIES /* This ifdef should go away */ |
| void *comport; |
| |
| hpte_init_pSeries(); |
| tce_init_pSeries(); |
| pSeries_pcibios_init_early(); |
| |
| #ifdef CONFIG_SMP |
| smp_init_pSeries(); |
| #endif |
| |
| /* Map the uart for udbg. */ |
| comport = (void *)__ioremap(naca->serialPortAddr, 16, _PAGE_NO_CACHE); |
| udbg_init_uart(comport); |
| |
| ppc_md.udbg_putc = udbg_putc; |
| ppc_md.udbg_getc = udbg_getc; |
| ppc_md.udbg_getc_poll = udbg_getc_poll; |
| #endif |
| } |
| |
| void __init |
| chrp_init(unsigned long r3, unsigned long r4, unsigned long r5, |
| unsigned long r6, unsigned long r7) |
| { |
| #if 0 /* PPPBBB remove this later... -Peter */ |
| #ifdef CONFIG_BLK_DEV_INITRD |
| /* take care of initrd if we have one */ |
| if ( r6 ) |
| { |
| initrd_start = __va(r6); |
| initrd_end = __va(r6 + r7); |
| } |
| #endif /* CONFIG_BLK_DEV_INITRD */ |
| #endif |
| |
| ppc_md.ppc_machine = systemcfg->platform; |
| |
| ppc_md.setup_arch = chrp_setup_arch; |
| ppc_md.setup_residual = NULL; |
| ppc_md.get_cpuinfo = chrp_get_cpuinfo; |
| if(naca->interrupt_controller == IC_OPEN_PIC) { |
| ppc_md.init_IRQ = openpic_init_IRQ; |
| ppc_md.init_irq_desc = openpic_init_irq_desc; |
| ppc_md.get_irq = openpic_get_irq; |
| } else { |
| ppc_md.init_IRQ = xics_init_IRQ; |
| ppc_md.init_irq_desc = xics_init_irq_desc; |
| ppc_md.get_irq = xics_get_irq; |
| } |
| ppc_md.init_ras_IRQ = init_ras_IRQ; |
| |
| #ifndef CONFIG_PPC_ISERIES |
| ppc_md.pcibios_fixup = pSeries_pcibios_fixup; |
| ppc_md.log_error = pSeries_log_error; |
| #else |
| ppc_md.pcibios_fixup = NULL; |
| // ppc_md.pcibios_fixup = iSeries_pcibios_fixup; |
| ppc_md.log_error = NULL; |
| #endif |
| |
| |
| ppc_md.init = chrp_init2; |
| |
| ppc_md.restart = rtas_restart; |
| ppc_md.power_off = rtas_power_off; |
| ppc_md.halt = rtas_halt; |
| |
| ppc_md.time_init = NULL; |
| ppc_md.get_boot_time = pSeries_get_boot_time; |
| ppc_md.get_rtc_time = pSeries_get_rtc_time; |
| ppc_md.set_rtc_time = pSeries_set_rtc_time; |
| ppc_md.calibrate_decr = pSeries_calibrate_decr; |
| |
| ppc_md.progress = chrp_progress; |
| |
| #ifdef CONFIG_VT |
| ppc_md.kbd_setkeycode = pckbd_setkeycode; |
| ppc_md.kbd_getkeycode = pckbd_getkeycode; |
| ppc_md.kbd_translate = pckbd_translate; |
| ppc_md.kbd_unexpected_up = pckbd_unexpected_up; |
| ppc_md.kbd_leds = pckbd_leds; |
| ppc_md.kbd_init_hw = pckbd_init_hw; |
| #ifdef CONFIG_MAGIC_SYSRQ |
| ppc_md.ppc_kbd_sysrq_xlate = pckbd_sysrq_xlate; |
| SYSRQ_KEY = 0x63; /* Print Screen */ |
| #endif |
| #endif |
| /* Build up the firmware_features bitmask field |
| * using contents of device-tree/ibm,hypertas-functions. |
| * Ultimately this functionality may be moved into prom.c prom_init(). |
| */ |
| struct device_node * dn; |
| char * hypertas; |
| unsigned int len; |
| dn = find_path_device("/rtas"); |
| cur_cpu_spec->firmware_features=0; |
| hypertas = get_property(dn, "ibm,hypertas-functions", &len); |
| if (hypertas) { |
| while (len > 0) { |
| int i, hypertas_len; |
| /* check value against table of strings */ |
| for(i=0; i < FIRMWARE_MAX_FEATURES; i++) { |
| if ((firmware_features_table[i].name) && |
| (strcmp(firmware_features_table[i].name,hypertas))==0) { |
| /* we have a match */ |
| cur_cpu_spec->firmware_features |= |
| (firmware_features_table[i].val); |
| break; |
| } |
| } |
| hypertas_len = strlen(hypertas); |
| len -= hypertas_len +1; |
| hypertas+= hypertas_len +1; |
| } |
| } |
| |
| printk(KERN_INFO "firmware_features = 0x%lx\n", |
| cur_cpu_spec->firmware_features); |
| } |
| |
| void __chrp |
| chrp_progress(char *s, unsigned short hex) |
| { |
| struct device_node *root; |
| int width, *p; |
| char *os; |
| static int display_character, set_indicator; |
| static int max_width; |
| static spinlock_t progress_lock = SPIN_LOCK_UNLOCKED; |
| static int pending_newline = 0; /* did last write end with unprinted newline? */ |
| |
| if (!rtas.base) |
| return; |
| |
| if (max_width == 0) { |
| if ( (root = find_path_device("/rtas")) && |
| (p = (unsigned int *)get_property(root, |
| "ibm,display-line-length", |
| NULL)) ) |
| max_width = *p; |
| else |
| max_width = 0x10; |
| display_character = rtas_token("display-character"); |
| set_indicator = rtas_token("set-indicator"); |
| } |
| |
| if(display_character == RTAS_UNKNOWN_SERVICE) { |
| /* use hex display if available */ |
| if(set_indicator != RTAS_UNKNOWN_SERVICE) |
| rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex); |
| return; |
| } |
| |
| spin_lock(&progress_lock); |
| |
| /* Last write ended with newline, but we didn't print it since |
| * it would just clear the bottom line of output. Print it now |
| * instead. |
| * |
| * If no newline is pending, print a CR to start output at the |
| * beginning of the line. |
| */ |
| if(pending_newline) { |
| rtas_call(display_character, 1, 1, NULL, '\r'); |
| rtas_call(display_character, 1, 1, NULL, '\n'); |
| pending_newline = 0; |
| } else |
| rtas_call(display_character, 1, 1, NULL, '\r'); |
| |
| width = max_width; |
| os = s; |
| while (*os) { |
| if(*os == '\n' || *os == '\r') { |
| /* Blank to end of line. */ |
| while(width-- > 0) |
| rtas_call(display_character, 1, 1, NULL, ' '); |
| |
| /* If newline is the last character, save it |
| * until next call to avoid bumping up the |
| * display output. |
| */ |
| if(*os == '\n' && !os[1]) { |
| pending_newline = 1; |
| spin_unlock(&progress_lock); |
| return; |
| } |
| |
| /* RTAS wants CR-LF, not just LF */ |
| |
| if(*os == '\n') { |
| rtas_call(display_character, 1, 1, NULL, '\r'); |
| rtas_call(display_character, 1, 1, NULL, '\n'); |
| } else { |
| /* CR might be used to re-draw a line, so we'll |
| * leave it alone and not add LF. |
| */ |
| rtas_call(display_character, 1, 1, NULL, *os); |
| } |
| |
| width = max_width; |
| } else { |
| width--; |
| rtas_call(display_character, 1, 1, NULL, *os); |
| } |
| |
| os++; |
| |
| /* if we overwrite the screen length */ |
| if ( width <= 0 ) |
| while ( (*os != 0) && (*os != '\n') && (*os != '\r') ) |
| os++; |
| } |
| |
| /* Blank to end of line. */ |
| while ( width-- > 0 ) |
| rtas_call(display_character, 1, 1, NULL, ' ' ); |
| |
| spin_unlock(&progress_lock); |
| } |
| |
| extern void setup_default_decr(void); |
| |
| void __init pSeries_calibrate_decr(void) |
| { |
| struct device_node *cpu; |
| struct div_result divres; |
| int *fp; |
| unsigned long freq, processor_freq; |
| |
| /* |
| * The cpu node should have a timebase-frequency property |
| * to tell us the rate at which the decrementer counts. |
| */ |
| freq = 16666000; /* hardcoded default */ |
| cpu = find_type_devices("cpu"); |
| if (cpu != 0) { |
| fp = (int *) get_property(cpu, "timebase-frequency", NULL); |
| if (fp != 0) |
| freq = *fp; |
| } |
| ppc_tb_freq = freq; |
| processor_freq = freq; |
| if (cpu != 0) { |
| fp = (int *) get_property(cpu, "clock-frequency", NULL); |
| if (fp != 0) |
| processor_freq = *fp; |
| } |
| ppc_proc_freq = processor_freq; |
| |
| printk("time_init: decrementer frequency = %lu.%.6lu MHz\n", |
| freq/1000000, freq%1000000 ); |
| printk("time_init: processor frequency = %lu.%.6lu MHz\n", |
| processor_freq/1000000, processor_freq%1000000 ); |
| |
| tb_ticks_per_jiffy = freq / HZ; |
| tb_ticks_per_sec = tb_ticks_per_jiffy * HZ; |
| tb_ticks_per_usec = freq / 1000000; |
| div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres ); |
| tb_to_xs = divres.result_low; |
| |
| setup_default_decr(); |
| } |
| |