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/* $Id: setup.c,v 1.8 2000/02/02 04:42:38 prumpf Exp $
*
* Initial setup-routines for HP 9000 based hardware.
*
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
* Modifications for PA-RISC (C) 1999 Helge Deller <helge.deller@ruhr-uni-bochum.de>
* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
* Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
* Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
*
* Initial PA-RISC Version: 04-23-1999 by Helge Deller
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/ptrace.h>
#include <linux/sched.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/config.h>
#include <linux/fs.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/blk.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/bootmem.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/threads.h>
#include <asm/cache.h>
#include <asm/hardware.h> /* for register_driver() stuff */
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/pdc.h>
#include <asm/led.h>
#include <asm/real.h>
#include <asm/system.h>
#include <asm/machdep.h> /* for pa7300lc_init() proto */
#include <asm/irq.h> /* for struct irq_region */
#include <asm/pdcpat.h> /* for PA_VIEW PDC_PAT_CPU_GET_NUMBER etc */
#include <linux/proc_fs.h>
#define COMMAND_LINE_SIZE 1024
char saved_command_line[COMMAND_LINE_SIZE];
/*
** KLUGE ALERT!
**
** We *really* should be using a combination of request_resource()
** and request_region()! But request_region() requires kmalloc since
** returns a new struct resource. And kmalloc just isn't available
** until after mem_init() is called from start_kernel().
**
** FIXME: assume contiguous memory initially.
** Additional chunks of memory might be added to sysram_resource.sibling.
*/
static struct resource sysrom_resource = {
name: "System ROM", start: 0x0f0000000UL, end: 0x0f00fffffUL,
flags: IORESOURCE_BUSY | IORESOURCE_MEM,
parent: &iomem_resource, sibling: NULL, child: NULL };
static struct resource pdcdata_resource;
static struct resource sysram_resource = {
name: "System RAM", start: 0UL, end: ~0UL /* bogus */,
flags: IORESOURCE_MEM,
parent: &iomem_resource, sibling: &sysrom_resource, child: &pdcdata_resource};
extern char _text; /* start of kernel code, defined by linker */
extern int data_start;
extern char _edata; /* end of data, begin BSS, defined by linker */
extern char _end; /* end of BSS, defined by linker */
static struct resource data_resource = {
name: "kernel Data", start: virt_to_phys(&data_start), end: virt_to_phys(&_end)-1,
flags: IORESOURCE_BUSY | IORESOURCE_MEM,
parent: &sysram_resource, sibling: NULL, child: NULL};
static struct resource code_resource = {
name: "Kernel Code", start: virt_to_phys(&_text), end: virt_to_phys(&data_start)-1,
flags: IORESOURCE_BUSY | IORESOURCE_MEM,
parent: &sysram_resource, sibling: &data_resource, child: NULL};
static struct resource pdcdata_resource = {
name: "PDC data (Page Zero)", start: 0, end: 0x9ff,
flags: IORESOURCE_BUSY | IORESOURCE_MEM,
parent: &sysram_resource, sibling: &code_resource, child: NULL};
struct system_cpuinfo_parisc boot_cpu_data;
struct cpuinfo_parisc cpu_data[NR_CPUS];
extern void do_inventory(void);
extern void cache_init(void);
extern struct hp_device * register_module(void *hpa);
static int cpu_driver_callback(struct hp_device *, struct pa_iodc_driver *);
static struct pa_iodc_driver cpu_drivers_for[] = {
{HPHW_NPROC, 0x0, 0x0, 0x0, 0, 0,
DRIVER_CHECK_HWTYPE,
"CPU", "PARISC", (void *) cpu_driver_callback},
{0,0,0,0,0,0,
0,
(char *) NULL, (char *) NULL, (void *) NULL }
};
static long fallback_cpu_hpa[] = { 0xfffa0000L, 0xfffbe000L, 0x0 };
/*
** PARISC CPU driver - claim "device" and initialize CPU data structures.
**
** Consolidate per CPU initialization into (mostly) one module.
** Monarch CPU will initialize boot_cpu_data which shouldn't
** change once the system has booted.
**
** The callback *should* do per-instance initialization of
** everything including the monarch. Some of the code that's
** in setup.c:start_parisc() should migrate here and start_parisc()
** should "register_driver(cpu_driver_for)" before calling
** do_inventory().
**
** The goal of consolidating CPU initialization into one place is
** to make sure all CPU's get initialized the same way.
** It would be nice if the even the manarch through the exact same code path.
** (up to rendevous at least).
*/
#undef ASSERT
#define ASSERT(expr) \
if(!(expr)) { \
printk( "\n" __FILE__ ":%d: Assertion " #expr " failed!\n",__LINE__); \
panic(#expr); \
}
static int
cpu_driver_callback(struct hp_device *d, struct pa_iodc_driver *dri)
{
#ifdef __LP64__
extern int pdc_pat; /* arch/parisc/kernel/inventory.c */
static unsigned long pdc_result[32] __attribute__ ((aligned (8))) = {0,0,0,0};
#endif
struct cpuinfo_parisc *p;
#ifndef CONFIG_SMP
if (boot_cpu_data.cpu_count > 0) {
printk(KERN_INFO "CONFIG_SMP disabled - not claiming addional CPUs\n");
return(1);
}
#endif
p = &cpu_data[boot_cpu_data.cpu_count];
boot_cpu_data.cpu_count++;
/* TODO: Enable FP regs - done early in start_parisc() now */
/* initialize counters */
memset(p, 0, sizeof(struct cpuinfo_parisc));
p->hpa = (unsigned long) d->hpa; /* save CPU hpa */
#ifdef __LP64__
if (pdc_pat) {
ulong status;
pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
status = pdc_pat_cell_module(& pdc_result, d->pcell_loc,
d->mod_index, PA_VIEW, & pa_pdc_cell);
ASSERT(PDC_RET_OK == status);
/* verify it's the same as what do_pat_inventory() found */
ASSERT(d->mod_info == pa_pdc_cell.mod_info);
ASSERT(d->pmod_loc == pa_pdc_cell.mod_location);
ASSERT(d->mod_path == pa_pdc_cell.mod_path);
p->txn_addr = pa_pdc_cell.mod[0]; /* id_eid for IO sapic */
/* get the cpu number */
status = mem_pdc_call( PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
__pa(& pdc_result), d->hpa);
ASSERT(PDC_RET_OK == status);
p->cpuid = pdc_result[0];
} else
#endif
{
p->txn_addr = (unsigned long) d->hpa; /* for normal parisc */
/* logical CPU ID and update global counter */
p->cpuid = boot_cpu_data.cpu_count - 1;
}
/*
** itimer and ipi IRQ handlers are statically initialized in
** arch/parisc/kernel/irq.c
*/
p->region = irq_region[IRQ_FROM_REGION(CPU_IRQ_REGION)];
return(0);
}
void __xchg_called_with_bad_pointer(void)
{
printk(KERN_EMERG "xchg() called with bad pointer !\n");
}
/* Some versions of IODC don't list the CPU, and since we don't walk
* the bus yet, we have to probe for processors at well known hpa
* addresses.
*/
void __init register_fallback_cpu (void)
{
struct hp_device *d = NULL;
int i = 0;
#ifdef CONFIG_SMP
#error "Revisit CPU fallback addresses for SMP (Assuming bus walk hasn't been implemented)"
#endif
printk ("No CPUs reported by firmware - probing...\n");
while (fallback_cpu_hpa[i]) {
d = register_module ((void *) fallback_cpu_hpa[i]);
if (d > 0) {
printk ("Found CPU at %lx\n", fallback_cpu_hpa[i]);
cpu_driver_callback (d, 0);
return;
}
i++;
}
panic ("No CPUs found. System halted.\n");
return;
}
/*
* Get CPU information and store it in the boot_cpu_data structure. */
void __init collect_boot_cpu_data(void)
{
memset(&boot_cpu_data,0,sizeof(boot_cpu_data));
boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
/* get CPU-Model Information... */
#define p ((unsigned long *)&boot_cpu_data.pdc.model)
if(pdc_model_info(&boot_cpu_data.pdc.model)==0)
printk("model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
#undef p
if(pdc_model_versions(&boot_cpu_data.pdc.versions, 0)==0)
printk("vers %08lx\n", boot_cpu_data.pdc.versions.cpuid);
if(pdc_model_cpuid(&boot_cpu_data.pdc.cpuid)==0)
printk("cpuid %08lx\n", boot_cpu_data.pdc.cpuid.cpuid);
printk("CPUID vers %ld rev %ld\n",
(boot_cpu_data.pdc.cpuid.cpuid >> 5) & 127,
boot_cpu_data.pdc.cpuid.cpuid & 31);
if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name)==0)
printk("model %s\n",boot_cpu_data.pdc.sys_model_name);
boot_cpu_data.model_name = parisc_getHWdescription(HPHW_NPROC,
boot_cpu_data.pdc.model.hversion>>4,
boot_cpu_data.pdc.model.sversion>>8);
boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
boot_cpu_data.cpu_type =
parisc_get_cpu_type(boot_cpu_data.pdc.model.hversion);
boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
}
#ifdef __LP64__
#define COMMAND_GLOBAL 0xfffffffffffe0030UL
#else
#define COMMAND_GLOBAL 0xfffe0030
#endif
#define CMD_RESET 5 /* reset any module */
/*
** The Wright Brothers and Gecko systems have a H/W problem
** (Lasi...'nuf said) may cause a broadcast reset to lockup
** the system. An HVERSION dependent PDC call was developed
** to perform a "safe", platform specific broadcast reset instead
** of kludging up all the code.
**
** Older machines which do not implement PDC_BROADCAST_RESET will
** return (with an error) and the regular broadcast reset can be
** issued. Obviously, if the PDC does implement PDC_BROADCAST_RESET
** the PDC call will not return (the system will be reset).
*/
static int
reset_parisc(struct notifier_block *self, unsigned long command, void *ptr)
{
printk("%s: %s(cmd=%lu)\n", __FILE__, __FUNCTION__, command);
switch(command) {
case MACH_RESTART:
#ifdef FASTBOOT_SELFTEST_SUPPORT
/*
** If user has modified the Firmware Selftest Bitmap,
** run the tests specified in the bitmap after the
** system is rebooted w/PDC_DO_RESET.
**
** ftc_bitmap = 0x1AUL "Skip destructive memory tests"
**
** Using "directed resets" at each processor with the MEM_TOC
** vector cleared will also avoid running destructive
** memory self tests. (Not implemented yet)
*/
if (ftc_bitmap) {
mem_pdc_call( PDC_BROADCAST_RESET,
PDC_DO_FIRM_TEST_RESET, PDC_FIRM_TEST_MAGIC,
ftc_bitmap);
}
#endif
/* "Normal" system reset */
(void) mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET,
0L, 0L, 0L);
/* Nope...box should reset with just CMD_RESET now */
gsc_writel(CMD_RESET, COMMAND_GLOBAL);
/* Wait for RESET to lay us to rest. */
while (1) ;
break;
}
return NOTIFY_DONE;
}
static struct notifier_block parisc_block = { reset_parisc, NULL, 0 };
/* start_parisc() will be called from head.S to setup our new memory_start
and actually start our kernel !
Memory-Layout is:
- Kernel-Image (code+data+BSS)
- Stack (stack-size see below!, stack-setup-code is in head.S)
- memory_start at end of stack..
*/
unsigned long mem_start, mem_max;
unsigned long start_pfn, max_pfn;
extern asmlinkage void __init start_kernel(void);
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
void __init start_parisc(unsigned arg0, unsigned arg1,
unsigned arg2, unsigned arg3)
{
register unsigned long ccr;
unsigned long memory_start;
/* Clear BSS */
{
char *p = &_edata, *q = &_end;
while (p < q) {
*p++ = 0;
}
}
pdc_console_init();
#ifdef __LP64__
printk("The 64-bit Kernel has started...\n");
#else
printk("The 32-bit Kernel has started...\n");
#endif
/*
** Enable FP coprocessor
**
** REVISIT: ccr should be set by PDC_COPROC results to support PA1.0.
** Hardcoding works for PA1.1 processors.
**
** REVISIT: this could be done in the "code 22" trap handler.
** (frowands idea - that way we know which processes need FP
** registers saved on the interrupt stack.)
**
** NEWS FLASH: wide kernels need FP coprocessor enabled to handle
** formatted printing of %lx for example (double divides I think)
*/
ccr = 0xc0;
mtctl(ccr, 10);
printk("Enabled FP coprocessor\n");
#ifdef __LP64__
printk( "If this is the LAST MESSAGE YOU SEE, you're probably using\n"
"32-bit millicode by mistake.\n");
#endif
memory_start = (unsigned long) &_end;
memory_start = (memory_start + PAGE_SIZE) & PAGE_MASK;
printk("Free memory starts at: 0x%lx\n", memory_start);
/* Collect stuff passed in from the boot loader */
printk(KERN_WARNING "%s(0x%x,0x%x,0x%x,0x%x)\n",
__FUNCTION__, arg0, arg1, arg2, arg3);
/* arg0 is free-mem start, arg1 is ptr to command line */
if (arg0 < 64) {
/* called from hpux boot loader */
saved_command_line[0] = '\0';
} else {
strcpy(saved_command_line, (char *)__va(arg1));
printk("PALO command line: '%s'\nPALO initrd %x-%x\n",
saved_command_line, arg2, arg3);
#ifdef CONFIG_BLK_DEV_INITRD
if (arg2 != 0) /* did palo pass us a ramdisk? */
{
initrd_start = (unsigned long)__va(arg2);
initrd_end = (unsigned long)__va(arg3);
}
#endif
}
mem_start = __pa(memory_start);
#define MAX_MEM (512*1024*1024)
mem_max = (PAGE0->imm_max_mem > MAX_MEM ? MAX_MEM : PAGE0->imm_max_mem);
collect_boot_cpu_data();
/* initialize the LCD/LED after boot_cpu_data is available ! */
led_init(); /* LCD/LED initialization */
do_inventory(); /* probe for hardware */
register_driver(cpu_drivers_for); /* claim all the CPUs */
if (boot_cpu_data.cpu_count == 0)
register_fallback_cpu();
printk("CPU(s): %d x %s at %d.%06d MHz\n",
boot_cpu_data.cpu_count,
boot_cpu_data.cpu_name,
boot_cpu_data.cpu_hz / 1000000,
boot_cpu_data.cpu_hz % 1000000 );
switch (boot_cpu_data.cpu_type) {
case pcx:
case pcxs:
case pcxt:
hppa_dma_ops = &pcx_dma_ops;
break;
case pcxl2:
pa7300lc_init();
case pcxl: /* falls through */
hppa_dma_ops = &pcxl_dma_ops;
break;
default:
break;
}
#if 1
/* KLUGE! this really belongs in kernel/resource.c! */
iomem_resource.end = ~0UL;
#endif
sysram_resource.end = mem_max - 1;
notifier_chain_register(&mach_notifier, &parisc_block);
start_kernel(); /* now back to arch-generic code... */
}
void __init setup_arch(char **cmdline_p)
{
unsigned long bootmap_size;
unsigned long start_pfn;
unsigned long mem_free;
*cmdline_p = saved_command_line;
/* initialize bootmem */
start_pfn = PFN_UP(mem_start);
max_pfn = PFN_DOWN(mem_max);
bootmap_size = init_bootmem(start_pfn, max_pfn);
mem_start += bootmap_size;
mem_free = mem_max - mem_start;
/* free_bootmem handles rounding nicely */
printk("free_bootmem(0x%lx, 0x%lx)\n", (unsigned long)mem_start,
(unsigned long)mem_free);
free_bootmem(mem_start, mem_free);
#ifdef CONFIG_BLK_DEV_INITRD
printk("initrd: %08x-%08x\n", (int) initrd_start, (int) initrd_end);
if (initrd_end != 0) {
initrd_below_start_ok = 1;
reserve_bootmem(__pa(initrd_start), initrd_end - initrd_start);
}
#endif
cache_init();
paging_init();
if((unsigned long)&init_task_union&(INIT_TASK_SIZE - 1)) {
printk("init_task_union not aligned. Please recompile the kernel after changing the first line in arch/parisc/kernel/init_task.c from \n\"#define PAD 0\" to\n\"#define PAD 1\" or vice versa\n");
for(;;);
}
#ifdef CONFIG_SERIAL_CONSOLE
/* nothing */
#elif CONFIG_VT
#if defined(CONFIG_STI_CONSOLE)
conswitchp = &dummy_con; /* we use take_over_console() later ! */
#elif defined(CONFIG_IODC_CONSOLE)
conswitchp = &prom_con; /* it's currently really "prom_con" */
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
}
#ifdef CONFIG_PROC_FS
/*
* Get CPU information for use by procfs.
*/
int get_cpuinfo(char *buffer)
{
char *p = buffer;
int n;
for(n=0; n<boot_cpu_data.cpu_count; n++) {
#ifdef CONFIG_SMP
if (!(cpu_online_map & (1<<n)))
continue;
#endif
p += sprintf(p, "processor\t: %d\n"
"cpu family\t: PA-RISC %s\n",
n, boot_cpu_data.family_name);
p += sprintf(p, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
/* cpu MHz */
p += sprintf(p, "cpu MHz\t\t: %d.%06d\n",
boot_cpu_data.cpu_hz / 1000000,
boot_cpu_data.cpu_hz % 1000000 );
p += sprintf(p, "model\t\t: %s\n"
"model name\t: %s\n",
boot_cpu_data.pdc.sys_model_name,
boot_cpu_data.model_name);
p += sprintf(p, "hversion\t: 0x%08x\n"
"sversion\t: 0x%08x\n",
boot_cpu_data.hversion,
boot_cpu_data.sversion );
p += get_cache_info(p);
/* print cachesize info ? */
p += sprintf(p, "bogomips\t: %lu.%02lu\n",
(loops_per_sec+2500)/500000,
((loops_per_sec+2500)/5000) % 100);
}
return p - buffer;
}
#endif
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